diff --git a/java/com/google/gerrit/acceptance/AbstractDaemonTest.java b/java/com/google/gerrit/acceptance/AbstractDaemonTest.java
index 8a77829..eae3e6b 100644
--- a/java/com/google/gerrit/acceptance/AbstractDaemonTest.java
+++ b/java/com/google/gerrit/acceptance/AbstractDaemonTest.java
@@ -49,7 +49,6 @@
 import com.google.gerrit.common.data.PermissionRule;
 import com.google.gerrit.common.data.PermissionRule.Action;
 import com.google.gerrit.extensions.api.GerritApi;
-import com.google.gerrit.extensions.api.changes.RelatedChangeAndCommitInfo;
 import com.google.gerrit.extensions.api.changes.ReviewInput;
 import com.google.gerrit.extensions.api.changes.RevisionApi;
 import com.google.gerrit.extensions.api.changes.SubmittedTogetherInfo;
@@ -1177,10 +1176,6 @@
     }
   }
 
-  protected RevCommit getHead(Repository repo) throws Exception {
-    return getHead(repo, "HEAD");
-  }
-
   @Nullable
   protected RevCommit getRemoteHead(Project.NameKey project, String branch) throws Exception {
     try (Repository repo = repoManager.openRepository(project)) {
@@ -1650,13 +1645,4 @@
     comments.sort(Comparator.comparing(c -> c.id));
     return comments;
   }
-
-  protected List<RelatedChangeAndCommitInfo> getRelated(PatchSet.Id ps) throws Exception {
-    return getRelated(ps.getParentKey(), ps.get());
-  }
-
-  protected List<RelatedChangeAndCommitInfo> getRelated(Change.Id changeId, int ps)
-      throws Exception {
-    return gApi.changes().id(changeId.get()).revision(ps).related().changes;
-  }
 }
diff --git a/java/com/google/gerrit/acceptance/PushOneCommit.java b/java/com/google/gerrit/acceptance/PushOneCommit.java
index 5e45df2..d0735c8 100644
--- a/java/com/google/gerrit/acceptance/PushOneCommit.java
+++ b/java/com/google/gerrit/acceptance/PushOneCommit.java
@@ -16,7 +16,6 @@
 
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.gerrit.acceptance.GitUtil.pushHead;
-import static java.util.stream.Collectors.toList;
 import static org.junit.Assert.assertEquals;
 
 import com.google.common.base.Strings;
@@ -31,7 +30,6 @@
 import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.ApprovalsUtil;
 import com.google.gerrit.server.notedb.ChangeNotes;
-import com.google.gerrit.server.notedb.NotesMigration;
 import com.google.gerrit.server.notedb.ReviewerStateInternal;
 import com.google.gerrit.server.query.change.ChangeData;
 import com.google.gerrit.server.query.change.InternalChangeQuery;
@@ -43,7 +41,6 @@
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicInteger;
-import java.util.stream.Stream;
 import org.eclipse.jgit.api.TagCommand;
 import org.eclipse.jgit.junit.TestRepository;
 import org.eclipse.jgit.lib.PersonIdent;
@@ -144,7 +141,6 @@
   private final ChangeNotes.Factory notesFactory;
   private final ApprovalsUtil approvalsUtil;
   private final Provider<InternalChangeQuery> queryProvider;
-  private final NotesMigration notesMigration;
   private final ReviewDb db;
   private final TestRepository<?> testRepo;
 
@@ -162,7 +158,6 @@
       ChangeNotes.Factory notesFactory,
       ApprovalsUtil approvalsUtil,
       Provider<InternalChangeQuery> queryProvider,
-      NotesMigration notesMigration,
       @Assisted ReviewDb db,
       @Assisted PersonIdent i,
       @Assisted TestRepository<?> testRepo)
@@ -171,7 +166,6 @@
         notesFactory,
         approvalsUtil,
         queryProvider,
-        notesMigration,
         db,
         i,
         testRepo,
@@ -185,7 +179,6 @@
       ChangeNotes.Factory notesFactory,
       ApprovalsUtil approvalsUtil,
       Provider<InternalChangeQuery> queryProvider,
-      NotesMigration notesMigration,
       @Assisted ReviewDb db,
       @Assisted PersonIdent i,
       @Assisted TestRepository<?> testRepo,
@@ -195,7 +188,6 @@
         notesFactory,
         approvalsUtil,
         queryProvider,
-        notesMigration,
         db,
         i,
         testRepo,
@@ -210,7 +202,6 @@
       ChangeNotes.Factory notesFactory,
       ApprovalsUtil approvalsUtil,
       Provider<InternalChangeQuery> queryProvider,
-      NotesMigration notesMigration,
       @Assisted ReviewDb db,
       @Assisted PersonIdent i,
       @Assisted TestRepository<?> testRepo,
@@ -222,7 +213,6 @@
         notesFactory,
         approvalsUtil,
         queryProvider,
-        notesMigration,
         db,
         i,
         testRepo,
@@ -237,24 +227,13 @@
       ChangeNotes.Factory notesFactory,
       ApprovalsUtil approvalsUtil,
       Provider<InternalChangeQuery> queryProvider,
-      NotesMigration notesMigration,
       @Assisted ReviewDb db,
       @Assisted PersonIdent i,
       @Assisted TestRepository<?> testRepo,
       @Assisted String subject,
       @Assisted Map<String, String> files)
       throws Exception {
-    this(
-        notesFactory,
-        approvalsUtil,
-        queryProvider,
-        notesMigration,
-        db,
-        i,
-        testRepo,
-        subject,
-        files,
-        null);
+    this(notesFactory, approvalsUtil, queryProvider, db, i, testRepo, subject, files, null);
   }
 
   @AssistedInject
@@ -262,7 +241,6 @@
       ChangeNotes.Factory notesFactory,
       ApprovalsUtil approvalsUtil,
       Provider<InternalChangeQuery> queryProvider,
-      NotesMigration notesMigration,
       @Assisted ReviewDb db,
       @Assisted PersonIdent i,
       @Assisted TestRepository<?> testRepo,
@@ -275,7 +253,6 @@
         notesFactory,
         approvalsUtil,
         queryProvider,
-        notesMigration,
         db,
         i,
         testRepo,
@@ -288,7 +265,6 @@
       ChangeNotes.Factory notesFactory,
       ApprovalsUtil approvalsUtil,
       Provider<InternalChangeQuery> queryProvider,
-      NotesMigration notesMigration,
       ReviewDb db,
       PersonIdent i,
       TestRepository<?> testRepo,
@@ -301,7 +277,6 @@
     this.notesFactory = notesFactory;
     this.approvalsUtil = approvalsUtil;
     this.queryProvider = queryProvider;
-    this.notesMigration = notesMigration;
     this.subject = subject;
     this.files = files;
     this.changeId = changeId;
@@ -436,22 +411,15 @@
       assertThat(c.getSubject()).isEqualTo(resSubj);
       assertThat(c.getStatus()).isEqualTo(expectedStatus);
       assertThat(Strings.emptyToNull(c.getTopic())).isEqualTo(expectedTopic);
-      if (notesMigration.readChanges()) {
-        assertReviewers(c, ReviewerStateInternal.REVIEWER, expectedReviewers);
-        assertReviewers(c, ReviewerStateInternal.CC, expectedCcs);
-      } else {
-        assertReviewers(
-            c,
-            ReviewerStateInternal.REVIEWER,
-            Stream.concat(expectedReviewers.stream(), expectedCcs.stream()).collect(toList()));
-      }
+      assertReviewers(c, ReviewerStateInternal.REVIEWER, expectedReviewers);
+      assertReviewers(c, ReviewerStateInternal.CC, expectedCcs);
     }
 
     private void assertReviewers(
         Change c, ReviewerStateInternal state, List<TestAccount> expectedReviewers)
         throws OrmException {
       Iterable<Account.Id> actualIds =
-          approvalsUtil.getReviewers(db, notesFactory.createChecked(db, c)).byState(state);
+          approvalsUtil.getReviewers(notesFactory.createChecked(db, c)).byState(state);
       assertThat(actualIds)
           .containsExactlyElementsIn(Sets.newHashSet(TestAccount.ids(expectedReviewers)));
     }
diff --git a/java/com/google/gerrit/httpd/raw/CatServlet.java b/java/com/google/gerrit/httpd/raw/CatServlet.java
index 4b5c227..051b33a 100644
--- a/java/com/google/gerrit/httpd/raw/CatServlet.java
+++ b/java/com/google/gerrit/httpd/raw/CatServlet.java
@@ -143,7 +143,7 @@
           return;
         }
       } else {
-        PatchSet patchSet = psUtil.get(requestDb.get(), notes, patchKey.getParentKey());
+        PatchSet patchSet = psUtil.get(notes, patchKey.getParentKey());
         if (patchSet == null) {
           rsp.sendError(HttpServletResponse.SC_NOT_FOUND);
           return;
diff --git a/java/com/google/gerrit/server/ApprovalCopier.java b/java/com/google/gerrit/server/ApprovalCopier.java
index c3d3b60..7083804 100644
--- a/java/com/google/gerrit/server/ApprovalCopier.java
+++ b/java/com/google/gerrit/server/ApprovalCopier.java
@@ -137,7 +137,7 @@
       @Nullable Config repoConfig,
       Iterable<PatchSetApproval> dontCopy)
       throws OrmException {
-    PatchSet ps = psUtil.get(db, notes, psId);
+    PatchSet ps = psUtil.get(notes, psId);
     if (ps == null) {
       return Collections.emptyList();
     }
diff --git a/java/com/google/gerrit/server/ApprovalsUtil.java b/java/com/google/gerrit/server/ApprovalsUtil.java
index 3625de6..95b92af 100644
--- a/java/com/google/gerrit/server/ApprovalsUtil.java
+++ b/java/com/google/gerrit/server/ApprovalsUtil.java
@@ -21,7 +21,6 @@
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.collect.ImmutableList;
-import com.google.common.collect.ImmutableListMultimap;
 import com.google.common.collect.Iterables;
 import com.google.common.collect.ListMultimap;
 import com.google.common.collect.Lists;
@@ -44,7 +43,6 @@
 import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.notedb.ChangeNotes;
 import com.google.gerrit.server.notedb.ChangeUpdate;
-import com.google.gerrit.server.notedb.NotesMigration;
 import com.google.gerrit.server.notedb.ReviewerStateInternal;
 import com.google.gerrit.server.permissions.ChangePermission;
 import com.google.gerrit.server.permissions.LabelPermission;
@@ -106,7 +104,6 @@
     return Iterables.filter(psas, a -> Objects.equals(a.getAccountId(), accountId));
   }
 
-  private final NotesMigration migration;
   private final ApprovalCopier copier;
   private final PermissionBackend permissionBackend;
   private final ProjectCache projectCache;
@@ -114,11 +111,7 @@
   @VisibleForTesting
   @Inject
   public ApprovalsUtil(
-      NotesMigration migration,
-      ApprovalCopier copier,
-      PermissionBackend permissionBackend,
-      ProjectCache projectCache) {
-    this.migration = migration;
+      ApprovalCopier copier, PermissionBackend permissionBackend, ProjectCache projectCache) {
     this.copier = copier;
     this.permissionBackend = permissionBackend;
     this.projectCache = projectCache;
@@ -127,15 +120,11 @@
   /**
    * Get all reviewers for a change.
    *
-   * @param db review database.
    * @param notes change notes.
    * @return reviewers for the change.
    * @throws OrmException if reviewers for the change could not be read.
    */
-  public ReviewerSet getReviewers(ReviewDb db, ChangeNotes notes) throws OrmException {
-    if (!migration.readChanges()) {
-      return ReviewerSet.fromApprovals(db.patchSetApprovals().byChange(notes.getChangeId()));
-    }
+  public ReviewerSet getReviewers(ChangeNotes notes) throws OrmException {
     return notes.load().getReviewers();
   }
 
@@ -148,23 +137,17 @@
    */
   public ReviewerSet getReviewers(ChangeNotes notes, Iterable<PatchSetApproval> allApprovals)
       throws OrmException {
-    if (!migration.readChanges()) {
-      return ReviewerSet.fromApprovals(allApprovals);
-    }
     return notes.load().getReviewers();
   }
 
   /**
-   * Get updates to reviewer set. Always returns empty list for ReviewDb.
+   * Get updates to reviewer set.
    *
    * @param notes change notes.
    * @return reviewer updates for the change.
    * @throws OrmException if reviewer updates for the change could not be read.
    */
   public List<ReviewerStatusUpdate> getReviewerUpdates(ChangeNotes notes) throws OrmException {
-    if (!migration.readChanges()) {
-      return ImmutableList.of();
-    }
     return notes.load().getReviewerUpdates();
   }
 
@@ -200,13 +183,7 @@
       throws OrmException {
     PatchSet.Id psId = change.currentPatchSetId();
     Collection<Account.Id> existingReviewers;
-    if (migration.readChanges()) {
-      // If using NoteDB, we only want reviewers in the REVIEWER state.
-      existingReviewers = notes.load().getReviewers().byState(REVIEWER);
-    } else {
-      // Prior to NoteDB, we gather all reviewers regardless of state.
-      existingReviewers = getReviewers(db, notes).all();
-    }
+    existingReviewers = notes.load().getReviewers().byState(REVIEWER);
     // Existing reviewers should include pending additions in the REVIEWER
     // state, taken from ChangeUpdate.
     existingReviewers = Lists.newArrayList(existingReviewers);
@@ -308,7 +285,7 @@
   }
 
   /**
-   * Adds approvals to ChangeUpdate for a new patch set, and writes to ReviewDb.
+   * Adds approvals to ChangeUpdate for a new patch set, and writes to NoteDb.
    *
    * @param db review database.
    * @param update change update.
@@ -346,7 +323,6 @@
     for (PatchSetApproval psa : cells) {
       update.putApproval(psa.getLabel(), psa.getValue());
     }
-    db.patchSetApprovals().insert(cells);
     return cells;
   }
 
@@ -377,16 +353,8 @@
     }
   }
 
-  public ListMultimap<PatchSet.Id, PatchSetApproval> byChange(ReviewDb db, ChangeNotes notes)
+  public ListMultimap<PatchSet.Id, PatchSetApproval> byChange(ChangeNotes notes)
       throws OrmException {
-    if (!migration.readChanges()) {
-      ImmutableListMultimap.Builder<PatchSet.Id, PatchSetApproval> result =
-          ImmutableListMultimap.builder();
-      for (PatchSetApproval psa : db.patchSetApprovals().byChange(notes.getChangeId())) {
-        result.put(psa.getPatchSetId(), psa);
-      }
-      return result.build();
-    }
     return notes.load().getApprovals();
   }
 
@@ -397,9 +365,6 @@
       @Nullable RevWalk rw,
       @Nullable Config repoConfig)
       throws OrmException {
-    if (!migration.readChanges()) {
-      return sortApprovals(db.patchSetApprovals().byPatchSet(psId));
-    }
     return copier.getForPatchSet(db, notes, psId, rw, repoConfig);
   }
 
@@ -411,19 +376,16 @@
       @Nullable RevWalk rw,
       @Nullable Config repoConfig)
       throws OrmException {
-    if (!migration.readChanges()) {
-      return sortApprovals(db.patchSetApprovals().byPatchSetUser(psId, accountId));
-    }
     return filterApprovals(byPatchSet(db, notes, psId, rw, repoConfig), accountId);
   }
 
-  public PatchSetApproval getSubmitter(ReviewDb db, ChangeNotes notes, PatchSet.Id c) {
+  public PatchSetApproval getSubmitter(ChangeNotes notes, PatchSet.Id c) {
     if (c == null) {
       return null;
     }
     try {
       // Submit approval is never copied, so bypass expensive byPatchSet call.
-      return getSubmitter(c, byChange(db, notes).get(c));
+      return getSubmitter(c, byChange(notes).get(c));
     } catch (OrmException e) {
       return null;
     }
diff --git a/java/com/google/gerrit/server/ChangeMessagesUtil.java b/java/com/google/gerrit/server/ChangeMessagesUtil.java
index 969cf38..c2b6b23 100644
--- a/java/com/google/gerrit/server/ChangeMessagesUtil.java
+++ b/java/com/google/gerrit/server/ChangeMessagesUtil.java
@@ -15,37 +15,24 @@
 package com.google.gerrit.server;
 
 import static com.google.common.base.Preconditions.checkState;
-import static com.google.gerrit.reviewdb.server.ReviewDbUtil.unwrapDb;
 import static java.util.Objects.requireNonNull;
 
-import com.google.common.annotations.VisibleForTesting;
 import com.google.gerrit.common.Nullable;
 import com.google.gerrit.extensions.common.ChangeMessageInfo;
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.reviewdb.client.ChangeMessage;
 import com.google.gerrit.reviewdb.client.PatchSet;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.account.AccountLoader;
 import com.google.gerrit.server.notedb.ChangeNotes;
 import com.google.gerrit.server.notedb.ChangeUpdate;
-import com.google.gerrit.server.notedb.NoteDbChangeState.PrimaryStorage;
-import com.google.gerrit.server.notedb.NotesMigration;
-import com.google.gerrit.server.update.BatchUpdateReviewDb;
 import com.google.gerrit.server.update.ChangeContext;
 import com.google.gwtorm.server.OrmException;
-import com.google.inject.Inject;
 import com.google.inject.Singleton;
 import java.sql.Timestamp;
-import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
 
-/**
- * Utility functions to manipulate ChangeMessages.
- *
- * <p>These methods either query for and update ChangeMessages in the NoteDb or ReviewDb, depending
- * on the state of the NotesMigration.
- */
+/** Utility functions to manipulate ChangeMessages. */
 @Singleton
 public class ChangeMessagesUtil {
   public static final String AUTOGENERATED_TAG_PREFIX = "autogenerated:";
@@ -100,27 +87,11 @@
     return workInProgress ? TAG_UPLOADED_WIP_PATCH_SET : TAG_UPLOADED_PATCH_SET;
   }
 
-  private static List<ChangeMessage> sortChangeMessages(Iterable<ChangeMessage> changeMessage) {
-    return ChangeNotes.MESSAGE_BY_TIME.sortedCopy(changeMessage);
-  }
-
-  private final NotesMigration migration;
-
-  @VisibleForTesting
-  @Inject
-  public ChangeMessagesUtil(NotesMigration migration) {
-    this.migration = migration;
-  }
-
-  public List<ChangeMessage> byChange(ReviewDb db, ChangeNotes notes) throws OrmException {
-    if (!migration.readChanges()) {
-      return sortChangeMessages(db.changeMessages().byChange(notes.getChangeId()));
-    }
+  public List<ChangeMessage> byChange(ChangeNotes notes) throws OrmException {
     return notes.load().getChangeMessages();
   }
 
-  public void addChangeMessage(ReviewDb db, ChangeUpdate update, ChangeMessage changeMessage)
-      throws OrmException {
+  public void addChangeMessage(ChangeUpdate update, ChangeMessage changeMessage) {
     checkState(
         Objects.equals(changeMessage.getAuthor(), update.getNullableAccountId()),
         "cannot store change message by %s in update by %s",
@@ -128,7 +99,6 @@
         update.getNullableAccountId());
     update.setChangeMessage(changeMessage.getMessage());
     update.setTag(changeMessage.getTag());
-    db.changeMessages().insert(Collections.singleton(changeMessage));
   }
 
   /**
@@ -139,63 +109,14 @@
    * deleted from both NoteDb and ReviewDb, the index of the change message must be used rather than
    * its ID.
    *
-   * @param db the {@code ReviewDb} instance to update.
    * @param update change update.
    * @param targetMessageIdx the index of the target change message.
    * @param newMessage the new message which is going to replace the old.
-   * @throws OrmException
    */
-  public void replaceChangeMessage(
-      ReviewDb db, ChangeUpdate update, int targetMessageIdx, String newMessage)
-      throws OrmException {
-    if (PrimaryStorage.of(update.getChange()).equals(PrimaryStorage.REVIEW_DB)) {
-      if (db instanceof BatchUpdateReviewDb) {
-        db = ((BatchUpdateReviewDb) db).unsafeGetDelegate();
-      }
-      db = unwrapDb(db);
-
-      List<ChangeMessage> messagesInReviewDb =
-          sortChangeMessages(db.changeMessages().byChange(update.getId()));
-      if (migration.readChanges()) {
-        sanityCheckForChangeMessages(messagesInReviewDb, update.getNotes().getChangeMessages());
-      }
-      ChangeMessage targetMessage = messagesInReviewDb.get(targetMessageIdx);
-      targetMessage.setMessage(newMessage);
-      db.changeMessages().upsert(Collections.singleton(targetMessage));
-    }
-
+  public void replaceChangeMessage(ChangeUpdate update, int targetMessageIdx, String newMessage) {
     update.deleteChangeMessageByRewritingHistory(targetMessageIdx, newMessage);
   }
 
-  private static void sanityCheckForChangeMessages(
-      List<ChangeMessage> messagesInReviewDb, List<ChangeMessage> messagesInNoteDb) {
-    String message =
-        String.format(
-            "Change messages in ReivewDb and NoteDb don't match: NoteDb %s; ReviewDb %s",
-            messagesInNoteDb, messagesInReviewDb);
-    if (messagesInReviewDb.size() != messagesInNoteDb.size()) {
-      throw new IllegalStateException(message);
-    }
-
-    for (int i = 0; i < messagesInReviewDb.size(); i++) {
-      ChangeMessage messageInReviewDb = messagesInReviewDb.get(i);
-      ChangeMessage messageInNoteDb = messagesInNoteDb.get(i);
-
-      // Don't compare the keys because they are different for the same change message in NoteDb and
-      // ReviewDb.
-      boolean isEqual =
-          Objects.equals(messageInReviewDb.getAuthor(), messageInNoteDb.getAuthor())
-              && Objects.equals(messageInReviewDb.getWrittenOn(), messageInNoteDb.getWrittenOn())
-              && Objects.equals(messageInReviewDb.getMessage(), messageInNoteDb.getMessage())
-              && Objects.equals(messageInReviewDb.getPatchSetId(), messageInNoteDb.getPatchSetId())
-              && Objects.equals(messageInReviewDb.getTag(), messageInNoteDb.getTag())
-              && Objects.equals(messageInReviewDb.getRealAuthor(), messageInNoteDb.getRealAuthor());
-      if (!isEqual) {
-        throw new IllegalStateException(message);
-      }
-    }
-  }
-
   /**
    * @param tag value of a tag, or null.
    * @return whether the tag starts with the autogenerated prefix.
diff --git a/java/com/google/gerrit/server/CommentsUtil.java b/java/com/google/gerrit/server/CommentsUtil.java
index 99dfbbb..b3812a0 100644
--- a/java/com/google/gerrit/server/CommentsUtil.java
+++ b/java/com/google/gerrit/server/CommentsUtil.java
@@ -16,16 +16,12 @@
 
 import static com.google.common.base.MoreObjects.firstNonNull;
 import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.gerrit.reviewdb.client.PatchLineComment.Status.PUBLISHED;
 import static java.util.stream.Collectors.toList;
 
 import com.google.common.collect.ComparisonChain;
 import com.google.common.collect.FluentIterable;
-import com.google.common.collect.ImmutableList;
-import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Ordering;
-import com.google.common.collect.Streams;
 import com.google.gerrit.common.Nullable;
 import com.google.gerrit.extensions.client.Side;
 import com.google.gerrit.extensions.common.CommentInfo;
@@ -35,31 +31,23 @@
 import com.google.gerrit.reviewdb.client.Comment;
 import com.google.gerrit.reviewdb.client.Patch;
 import com.google.gerrit.reviewdb.client.PatchLineComment;
-import com.google.gerrit.reviewdb.client.PatchLineComment.Status;
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.client.RefNames;
 import com.google.gerrit.reviewdb.client.RobotComment;
-import com.google.gerrit.reviewdb.server.ReviewDb;
-import com.google.gerrit.reviewdb.server.ReviewDbUtil;
 import com.google.gerrit.server.config.AllUsersName;
 import com.google.gerrit.server.config.GerritServerId;
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.notedb.ChangeNotes;
 import com.google.gerrit.server.notedb.ChangeUpdate;
-import com.google.gerrit.server.notedb.NoteDbChangeState.PrimaryStorage;
-import com.google.gerrit.server.notedb.NotesMigration;
 import com.google.gerrit.server.patch.PatchListCache;
 import com.google.gerrit.server.patch.PatchListNotAvailableException;
-import com.google.gerrit.server.update.BatchUpdateReviewDb;
 import com.google.gerrit.server.update.ChangeContext;
 import com.google.gwtorm.server.OrmException;
-import com.google.gwtorm.server.ResultSet;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
 import org.eclipse.jgit.lib.BatchRefUpdate;
@@ -70,12 +58,7 @@
 import org.eclipse.jgit.revwalk.RevWalk;
 import org.eclipse.jgit.transport.ReceiveCommand;
 
-/**
- * Utility functions to manipulate Comments.
- *
- * <p>These methods either query for and update Comments in the NoteDb or ReviewDb, depending on the
- * state of the NotesMigration.
- */
+/** Utility functions to manipulate Comments. */
 @Singleton
 public class CommentsUtil {
   public static final Ordering<Comment> COMMENT_ORDER =
@@ -127,18 +110,13 @@
 
   private final GitRepositoryManager repoManager;
   private final AllUsersName allUsers;
-  private final NotesMigration migration;
   private final String serverId;
 
   @Inject
   CommentsUtil(
-      GitRepositoryManager repoManager,
-      AllUsersName allUsers,
-      NotesMigration migration,
-      @GerritServerId String serverId) {
+      GitRepositoryManager repoManager, AllUsersName allUsers, @GerritServerId String serverId) {
     this.repoManager = repoManager;
     this.allUsers = allUsers;
-    this.migration = migration;
     this.serverId = serverId;
   }
 
@@ -158,7 +136,7 @@
       } else {
         // Inherit unresolved value from inReplyTo comment if not specified.
         Comment.Key key = new Comment.Key(parentUuid, path, psId.patchSetId);
-        Optional<Comment> parent = getPublished(ctx.getDb(), ctx.getNotes(), key);
+        Optional<Comment> parent = getPublished(ctx.getNotes(), key);
         if (!parent.isPresent()) {
           throw new UnprocessableEntityException("Invalid parentUuid supplied for comment");
         }
@@ -201,119 +179,64 @@
     return c;
   }
 
-  public Optional<Comment> getPublished(ReviewDb db, ChangeNotes notes, Comment.Key key)
-      throws OrmException {
-    if (!migration.readChanges()) {
-      return getReviewDb(db, notes, key);
-    }
-    return publishedByChange(db, notes).stream().filter(c -> key.equals(c.key)).findFirst();
+  public Optional<Comment> getPublished(ChangeNotes notes, Comment.Key key) throws OrmException {
+    return publishedByChange(notes).stream().filter(c -> key.equals(c.key)).findFirst();
   }
 
-  public Optional<Comment> getDraft(
-      ReviewDb db, ChangeNotes notes, IdentifiedUser user, Comment.Key key) throws OrmException {
-    if (!migration.readChanges()) {
-      Optional<Comment> c = getReviewDb(db, notes, key);
-      if (c.isPresent() && !c.get().author.getId().equals(user.getAccountId())) {
-        throw new OrmException(
-            String.format(
-                "Expected draft %s to belong to account %s, but it belongs to %s",
-                key, user.getAccountId(), c.get().author.getId()));
-      }
-      return c;
-    }
-    return draftByChangeAuthor(db, notes, user.getAccountId())
+  public Optional<Comment> getDraft(ChangeNotes notes, IdentifiedUser user, Comment.Key key)
+      throws OrmException {
+    return draftByChangeAuthor(notes, user.getAccountId())
         .stream()
         .filter(c -> key.equals(c.key))
         .findFirst();
   }
 
-  private Optional<Comment> getReviewDb(ReviewDb db, ChangeNotes notes, Comment.Key key)
-      throws OrmException {
-    return Optional.ofNullable(
-            db.patchComments().get(PatchLineComment.Key.from(notes.getChangeId(), key)))
-        .map(plc -> plc.asComment(serverId));
-  }
-
-  public List<Comment> publishedByChange(ReviewDb db, ChangeNotes notes) throws OrmException {
-    if (!migration.readChanges()) {
-      return sort(byCommentStatus(db.patchComments().byChange(notes.getChangeId()), PUBLISHED));
-    }
-
+  public List<Comment> publishedByChange(ChangeNotes notes) throws OrmException {
     notes.load();
     return sort(Lists.newArrayList(notes.getComments().values()));
   }
 
   public List<RobotComment> robotCommentsByChange(ChangeNotes notes) throws OrmException {
-    if (!migration.readChanges()) {
-      return ImmutableList.of();
-    }
-
     notes.load();
     return sort(Lists.newArrayList(notes.getRobotComments().values()));
   }
 
-  public List<Comment> draftByChange(ReviewDb db, ChangeNotes notes) throws OrmException {
-    if (!migration.readChanges()) {
-      return sort(byCommentStatus(db.patchComments().byChange(notes.getChangeId()), Status.DRAFT));
-    }
-
+  public List<Comment> draftByChange(ChangeNotes notes) throws OrmException {
     List<Comment> comments = new ArrayList<>();
     for (Ref ref : getDraftRefs(notes.getChangeId())) {
       Account.Id account = Account.Id.fromRefSuffix(ref.getName());
       if (account != null) {
-        comments.addAll(draftByChangeAuthor(db, notes, account));
+        comments.addAll(draftByChangeAuthor(notes, account));
       }
     }
     return sort(comments);
   }
 
-  private List<Comment> byCommentStatus(
-      ResultSet<PatchLineComment> comments, PatchLineComment.Status status) {
-    return toComments(
-        serverId, Lists.newArrayList(Iterables.filter(comments, c -> c.getStatus() == status)));
-  }
-
-  public List<Comment> byPatchSet(ReviewDb db, ChangeNotes notes, PatchSet.Id psId)
-      throws OrmException {
-    if (!migration.readChanges()) {
-      return sort(toComments(serverId, db.patchComments().byPatchSet(psId).toList()));
-    }
+  public List<Comment> byPatchSet(ChangeNotes notes, PatchSet.Id psId) throws OrmException {
     List<Comment> comments = new ArrayList<>();
-    comments.addAll(publishedByPatchSet(db, notes, psId));
+    comments.addAll(publishedByPatchSet(notes, psId));
 
     for (Ref ref : getDraftRefs(notes.getChangeId())) {
       Account.Id account = Account.Id.fromRefSuffix(ref.getName());
       if (account != null) {
-        comments.addAll(draftByPatchSetAuthor(db, psId, account, notes));
+        comments.addAll(draftByPatchSetAuthor(psId, account, notes));
       }
     }
     return sort(comments);
   }
 
-  public List<Comment> publishedByChangeFile(
-      ReviewDb db, ChangeNotes notes, Change.Id changeId, String file) throws OrmException {
-    if (!migration.readChanges()) {
-      return sort(
-          toComments(serverId, db.patchComments().publishedByChangeFile(changeId, file).toList()));
-    }
+  public List<Comment> publishedByChangeFile(ChangeNotes notes, String file) throws OrmException {
     return commentsOnFile(notes.load().getComments().values(), file);
   }
 
-  public List<Comment> publishedByPatchSet(ReviewDb db, ChangeNotes notes, PatchSet.Id psId)
+  public List<Comment> publishedByPatchSet(ChangeNotes notes, PatchSet.Id psId)
       throws OrmException {
-    if (!migration.readChanges()) {
-      return removeCommentsOnAncestorOfCommitMessage(
-          sort(toComments(serverId, db.patchComments().publishedByPatchSet(psId).toList())));
-    }
     return removeCommentsOnAncestorOfCommitMessage(
         commentsOnPatchSet(notes.load().getComments().values(), psId));
   }
 
   public List<RobotComment> robotCommentsByPatchSet(ChangeNotes notes, PatchSet.Id psId)
       throws OrmException {
-    if (!migration.readChanges()) {
-      return ImmutableList.of();
-    }
     return commentsOnPatchSet(notes.load().getRobotComments().values(), psId);
   }
 
@@ -330,49 +253,28 @@
         .collect(toList());
   }
 
-  public List<Comment> draftByPatchSetAuthor(
-      ReviewDb db, PatchSet.Id psId, Account.Id author, ChangeNotes notes) throws OrmException {
-    if (!migration.readChanges()) {
-      return sort(
-          toComments(serverId, db.patchComments().draftByPatchSetAuthor(psId, author).toList()));
-    }
+  public List<Comment> draftByPatchSetAuthor(PatchSet.Id psId, Account.Id author, ChangeNotes notes)
+      throws OrmException {
     return commentsOnPatchSet(notes.load().getDraftComments(author).values(), psId);
   }
 
-  public List<Comment> draftByChangeFileAuthor(
-      ReviewDb db, ChangeNotes notes, String file, Account.Id author) throws OrmException {
-    if (!migration.readChanges()) {
-      return sort(
-          toComments(
-              serverId,
-              db.patchComments()
-                  .draftByChangeFileAuthor(notes.getChangeId(), file, author)
-                  .toList()));
-    }
+  public List<Comment> draftByChangeFileAuthor(ChangeNotes notes, String file, Account.Id author)
+      throws OrmException {
     return commentsOnFile(notes.load().getDraftComments(author).values(), file);
   }
 
-  public List<Comment> draftByChangeAuthor(ReviewDb db, ChangeNotes notes, Account.Id author)
+  public List<Comment> draftByChangeAuthor(ChangeNotes notes, Account.Id author)
       throws OrmException {
-    if (!migration.readChanges()) {
-      return Streams.stream(db.patchComments().draftByAuthor(author))
-          .filter(c -> c.getPatchSetId().getParentKey().equals(notes.getChangeId()))
-          .map(plc -> plc.asComment(serverId))
-          .sorted(COMMENT_ORDER)
-          .collect(toList());
-    }
     List<Comment> comments = new ArrayList<>();
     comments.addAll(notes.getDraftComments(author).values());
     return sort(comments);
   }
 
   public void putComments(
-      ReviewDb db, ChangeUpdate update, PatchLineComment.Status status, Iterable<Comment> comments)
-      throws OrmException {
+      ChangeUpdate update, PatchLineComment.Status status, Iterable<Comment> comments) {
     for (Comment c : comments) {
       update.putComment(status, c);
     }
-    db.patchComments().upsert(toPatchLineComments(update.getId(), status, comments));
   }
 
   public void putRobotComments(ChangeUpdate update, Iterable<RobotComment> comments) {
@@ -381,37 +283,14 @@
     }
   }
 
-  public void deleteComments(ReviewDb db, ChangeUpdate update, Iterable<Comment> comments)
-      throws OrmException {
+  public void deleteComments(ChangeUpdate update, Iterable<Comment> comments) {
     for (Comment c : comments) {
       update.deleteComment(c);
     }
-    db.patchComments()
-        .delete(toPatchLineComments(update.getId(), PatchLineComment.Status.DRAFT, comments));
   }
 
   public void deleteCommentByRewritingHistory(
-      ReviewDb db, ChangeUpdate update, Comment.Key commentKey, PatchSet.Id psId, String newMessage)
-      throws OrmException {
-    if (PrimaryStorage.of(update.getChange()).equals(PrimaryStorage.REVIEW_DB)) {
-      PatchLineComment.Key key =
-          new PatchLineComment.Key(new Patch.Key(psId, commentKey.filename), commentKey.uuid);
-
-      if (db instanceof BatchUpdateReviewDb) {
-        db = ((BatchUpdateReviewDb) db).unsafeGetDelegate();
-      }
-      db = ReviewDbUtil.unwrapDb(db);
-
-      PatchLineComment patchLineComment = db.patchComments().get(key);
-
-      if (!patchLineComment.getStatus().equals(PUBLISHED)) {
-        throw new OrmException(String.format("comment %s is not published", key));
-      }
-
-      patchLineComment.setMessage(newMessage);
-      db.patchComments().upsert(Collections.singleton(patchLineComment));
-    }
-
+      ChangeUpdate update, Comment.Key commentKey, String newMessage) {
     update.deleteCommentByRewritingHistory(commentKey.uuid, newMessage);
   }
 
diff --git a/java/com/google/gerrit/server/PatchSetUtil.java b/java/com/google/gerrit/server/PatchSetUtil.java
index f6c7abc..9405486 100644
--- a/java/com/google/gerrit/server/PatchSetUtil.java
+++ b/java/com/google/gerrit/server/PatchSetUtil.java
@@ -15,17 +15,11 @@
 package com.google.gerrit.server;
 
 import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.collect.ImmutableMap.toImmutableMap;
-import static com.google.gerrit.server.ChangeUtil.PS_ID_ORDER;
-import static com.google.gerrit.server.notedb.PatchSetState.PUBLISHED;
 import static java.util.Objects.requireNonNull;
-import static java.util.function.Function.identity;
 
 import com.google.common.collect.ImmutableCollection;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Maps;
-import com.google.common.collect.Sets;
-import com.google.common.collect.Streams;
 import com.google.gerrit.common.data.LabelFunction;
 import com.google.gerrit.common.data.LabelType;
 import com.google.gerrit.extensions.restapi.ResourceConflictException;
@@ -38,7 +32,6 @@
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.notedb.ChangeNotes;
 import com.google.gerrit.server.notedb.ChangeUpdate;
-import com.google.gerrit.server.notedb.NotesMigration;
 import com.google.gerrit.server.project.ProjectCache;
 import com.google.gerrit.server.project.ProjectState;
 import com.google.gwtorm.server.OrmException;
@@ -47,7 +40,6 @@
 import com.google.inject.Singleton;
 import java.io.IOException;
 import java.sql.Timestamp;
-import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 import org.eclipse.jgit.lib.ObjectId;
@@ -58,7 +50,6 @@
 /** Utilities for manipulating patch sets. */
 @Singleton
 public class PatchSetUtil {
-  private final NotesMigration migration;
   private final Provider<ApprovalsUtil> approvalsUtilProvider;
   private final ProjectCache projectCache;
   private final Provider<ReviewDb> dbProvider;
@@ -66,62 +57,38 @@
 
   @Inject
   PatchSetUtil(
-      NotesMigration migration,
       Provider<ApprovalsUtil> approvalsUtilProvider,
       ProjectCache projectCache,
       Provider<ReviewDb> dbProvider,
       GitRepositoryManager repoManager) {
-    this.migration = migration;
     this.approvalsUtilProvider = approvalsUtilProvider;
     this.projectCache = projectCache;
     this.dbProvider = dbProvider;
     this.repoManager = repoManager;
   }
 
-  public PatchSet current(ReviewDb db, ChangeNotes notes) throws OrmException {
-    return get(db, notes, notes.getChange().currentPatchSetId());
+  public PatchSet current(ChangeNotes notes) throws OrmException {
+    return get(notes, notes.getChange().currentPatchSetId());
   }
 
-  public PatchSet get(ReviewDb db, ChangeNotes notes, PatchSet.Id psId) throws OrmException {
-    if (!migration.readChanges()) {
-      return db.patchSets().get(psId);
-    }
+  public PatchSet get(ChangeNotes notes, PatchSet.Id psId) throws OrmException {
     return notes.load().getPatchSets().get(psId);
   }
 
-  public ImmutableCollection<PatchSet> byChange(ReviewDb db, ChangeNotes notes)
-      throws OrmException {
-    if (!migration.readChanges()) {
-      return PS_ID_ORDER.immutableSortedCopy(db.patchSets().byChange(notes.getChangeId()));
-    }
+  public ImmutableCollection<PatchSet> byChange(ChangeNotes notes) throws OrmException {
     return notes.load().getPatchSets().values();
   }
 
-  public ImmutableMap<PatchSet.Id, PatchSet> byChangeAsMap(ReviewDb db, ChangeNotes notes)
-      throws OrmException {
-    if (!migration.readChanges()) {
-      ImmutableMap.Builder<PatchSet.Id, PatchSet> result = ImmutableMap.builder();
-      for (PatchSet ps : PS_ID_ORDER.sortedCopy(db.patchSets().byChange(notes.getChangeId()))) {
-        result.put(ps.getId(), ps);
-      }
-      return result.build();
-    }
+  public ImmutableMap<PatchSet.Id, PatchSet> byChangeAsMap(ChangeNotes notes) throws OrmException {
     return notes.load().getPatchSets();
   }
 
   public ImmutableMap<PatchSet.Id, PatchSet> getAsMap(
-      ReviewDb db, ChangeNotes notes, Set<PatchSet.Id> patchSetIds) throws OrmException {
-    if (!migration.readChanges()) {
-      patchSetIds = Sets.filter(patchSetIds, p -> p.getParentKey().equals(notes.getChangeId()));
-      return Streams.stream(db.patchSets().get(patchSetIds))
-          .sorted(PS_ID_ORDER)
-          .collect(toImmutableMap(PatchSet::getId, identity()));
-    }
+      ChangeNotes notes, Set<PatchSet.Id> patchSetIds) throws OrmException {
     return ImmutableMap.copyOf(Maps.filterKeys(notes.load().getPatchSets(), patchSetIds::contains));
   }
 
   public PatchSet insert(
-      ReviewDb db,
       RevWalk rw,
       ChangeUpdate update,
       PatchSet.Id psId,
@@ -129,10 +96,14 @@
       List<String> groups,
       String pushCertificate,
       String description)
-      throws OrmException, IOException {
+      throws IOException {
     requireNonNull(groups, "groups may not be null");
     ensurePatchSetMatches(psId, update);
 
+    update.setCommit(rw, commit, pushCertificate);
+    update.setPsDescription(description);
+    update.setGroups(groups);
+
     PatchSet ps = new PatchSet(psId);
     ps.setRevision(new RevId(commit.name()));
     ps.setUploader(update.getAccountId());
@@ -140,21 +111,9 @@
     ps.setGroups(groups);
     ps.setPushCertificate(pushCertificate);
     ps.setDescription(description);
-    db.patchSets().insert(Collections.singleton(ps));
-
-    update.setCommit(rw, commit, pushCertificate);
-    update.setPsDescription(description);
-    update.setGroups(groups);
-
     return ps;
   }
 
-  public void publish(ReviewDb db, ChangeUpdate update, PatchSet ps) throws OrmException {
-    ensurePatchSetMatches(ps.getId(), update);
-    update.setPatchSetState(PUBLISHED);
-    db.patchSets().update(Collections.singleton(ps));
-  }
-
   private static void ensurePatchSetMatches(PatchSet.Id psId, ChangeUpdate update) {
     Change.Id changeId = update.getChange().getId();
     checkArgument(
@@ -173,11 +132,9 @@
     }
   }
 
-  public void setGroups(ReviewDb db, ChangeUpdate update, PatchSet ps, List<String> groups)
-      throws OrmException {
+  public void setGroups(ChangeUpdate update, PatchSet ps, List<String> groups) {
     ps.setGroups(groups);
     update.setGroups(groups);
-    db.patchSets().update(Collections.singleton(ps));
   }
 
   /** Check if the current patch set of the change is locked. */
diff --git a/java/com/google/gerrit/server/PublishCommentUtil.java b/java/com/google/gerrit/server/PublishCommentUtil.java
index a90f3e7..25db8d9 100644
--- a/java/com/google/gerrit/server/PublishCommentUtil.java
+++ b/java/com/google/gerrit/server/PublishCommentUtil.java
@@ -56,8 +56,7 @@
     }
 
     Map<Id, PatchSet> patchSets =
-        psUtil.getAsMap(
-            ctx.getDb(), notes, drafts.stream().map(d -> psId(notes, d)).collect(toSet()));
+        psUtil.getAsMap(notes, drafts.stream().map(d -> psId(notes, d)).collect(toSet()));
     for (Comment d : drafts) {
       PatchSet ps = patchSets.get(psId(notes, d));
       if (ps == null) {
@@ -74,7 +73,7 @@
         throw new OrmException(e);
       }
     }
-    commentsUtil.putComments(ctx.getDb(), ctx.getUpdate(psId), PUBLISHED, drafts);
+    commentsUtil.putComments(ctx.getUpdate(psId), PUBLISHED, drafts);
   }
 
   private static PatchSet.Id psId(ChangeNotes notes, Comment c) {
diff --git a/java/com/google/gerrit/server/change/AbandonOp.java b/java/com/google/gerrit/server/change/AbandonOp.java
index 5affd5c..3999955 100644
--- a/java/com/google/gerrit/server/change/AbandonOp.java
+++ b/java/com/google/gerrit/server/change/AbandonOp.java
@@ -99,13 +99,13 @@
     if (!change.getStatus().isOpen()) {
       throw new ResourceConflictException("change is " + ChangeUtil.status(change));
     }
-    patchSet = psUtil.get(ctx.getDb(), ctx.getNotes(), psId);
+    patchSet = psUtil.get(ctx.getNotes(), psId);
     change.setStatus(Change.Status.ABANDONED);
     change.setLastUpdatedOn(ctx.getWhen());
 
     update.setStatus(change.getStatus());
     message = newMessage(ctx);
-    cmUtil.addChangeMessage(ctx.getDb(), update, message);
+    cmUtil.addChangeMessage(update, message);
     return true;
   }
 
diff --git a/java/com/google/gerrit/server/change/AddReviewersOp.java b/java/com/google/gerrit/server/change/AddReviewersOp.java
index 947dead..cba6954 100644
--- a/java/com/google/gerrit/server/change/AddReviewersOp.java
+++ b/java/com/google/gerrit/server/change/AddReviewersOp.java
@@ -213,7 +213,7 @@
     checkAdded();
 
     if (patchSet == null) {
-      patchSet = requireNonNull(psUtil.current(ctx.getDb(), ctx.getNotes()));
+      patchSet = requireNonNull(psUtil.current(ctx.getNotes()));
     }
     return true;
   }
diff --git a/java/com/google/gerrit/server/change/ChangeInserter.java b/java/com/google/gerrit/server/change/ChangeInserter.java
index 33c7f73..d967a46 100644
--- a/java/com/google/gerrit/server/change/ChangeInserter.java
+++ b/java/com/google/gerrit/server/change/ChangeInserter.java
@@ -412,14 +412,7 @@
     }
     patchSet =
         psUtil.insert(
-            ctx.getDb(),
-            ctx.getRevWalk(),
-            update,
-            psId,
-            commitId,
-            newGroups,
-            pushCert,
-            patchSetDescription);
+            ctx.getRevWalk(), update, psId, commitId, newGroups, pushCert, patchSetDescription);
 
     /* TODO: fixStatus is used here because the tests
      * (byStatusClosed() in AbstractQueryChangesTest)
@@ -459,7 +452,7 @@
               patchSet.getCreatedOn(),
               message,
               ChangeMessagesUtil.uploadedPatchSetTag(workInProgress));
-      cmUtil.addChangeMessage(db, update, changeMessage);
+      cmUtil.addChangeMessage(update, changeMessage);
     }
     return true;
   }
diff --git a/java/com/google/gerrit/server/change/ChangeJson.java b/java/com/google/gerrit/server/change/ChangeJson.java
index b7049a7..889a20c 100644
--- a/java/com/google/gerrit/server/change/ChangeJson.java
+++ b/java/com/google/gerrit/server/change/ChangeJson.java
@@ -667,7 +667,7 @@
   }
 
   private Collection<ChangeMessageInfo> messages(ChangeData cd) throws OrmException {
-    List<ChangeMessage> messages = cmUtil.byChange(db.get(), cd.notes());
+    List<ChangeMessage> messages = cmUtil.byChange(cd.notes());
     if (messages.isEmpty()) {
       return Collections.emptyList();
     }
diff --git a/java/com/google/gerrit/server/change/ChangeResource.java b/java/com/google/gerrit/server/change/ChangeResource.java
index ef8b2f9..55dbe87 100644
--- a/java/com/google/gerrit/server/change/ChangeResource.java
+++ b/java/com/google/gerrit/server/change/ChangeResource.java
@@ -154,11 +154,7 @@
       accounts.add(getChange().getAssignee());
     }
     try {
-      patchSetUtil
-          .byChange(db.get(), notes)
-          .stream()
-          .map(PatchSet::getUploader)
-          .forEach(accounts::add);
+      patchSetUtil.byChange(notes).stream().map(PatchSet::getUploader).forEach(accounts::add);
 
       // It's intentional to include the states for *all* reviewers into the ETag computation.
       // We need the states of all current reviewers and CCs because they are part of ChangeInfo.
@@ -167,7 +163,7 @@
       // set of accounts that posted a message is too expensive. However everyone who posts a
       // message is automatically added as reviewer. Hence if we include removed reviewers we can
       // be sure that we have all accounts that posted messages on the change.
-      accounts.addAll(approvalUtil.getReviewers(db.get(), notes).all());
+      accounts.addAll(approvalUtil.getReviewers(notes).all());
     } catch (OrmException e) {
       // This ETag will be invalidated if it loads next time.
     }
diff --git a/java/com/google/gerrit/server/change/ConsistencyChecker.java b/java/com/google/gerrit/server/change/ConsistencyChecker.java
index 6e5158b..b29f42a 100644
--- a/java/com/google/gerrit/server/change/ConsistencyChecker.java
+++ b/java/com/google/gerrit/server/change/ConsistencyChecker.java
@@ -230,7 +230,7 @@
 
   private void checkCurrentPatchSetEntity() {
     try {
-      currPs = psUtil.current(db.get(), notes);
+      currPs = psUtil.current(notes);
       if (currPs == null) {
         problem(
             String.format("Current patch set %d not found", change().currentPatchSetId().get()));
@@ -258,7 +258,7 @@
     List<PatchSet> all;
     try {
       // Iterate in descending order.
-      all = PS_ID_ORDER.sortedCopy(psUtil.byChange(db.get(), notes));
+      all = PS_ID_ORDER.sortedCopy(psUtil.byChange(notes));
     } catch (OrmException e) {
       return error("Failed to look up patch sets", e);
     }
@@ -705,7 +705,7 @@
       // Doesn't make any assumptions about the order in which deletes happen
       // and whether they are seen by this op; we are already given the full set
       // of patch sets that will eventually be deleted in this update.
-      for (PatchSet ps : psUtil.byChange(ctx.getDb(), ctx.getNotes())) {
+      for (PatchSet ps : psUtil.byChange(ctx.getNotes())) {
         if (!toDelete.contains(ps.getId())) {
           all.add(ps.getId());
         }
@@ -714,8 +714,7 @@
         throw new NoPatchSetsWouldRemainException();
       }
       PatchSet.Id latest = ReviewDbUtil.intKeyOrdering().max(all);
-      ctx.getChange()
-          .setCurrentPatchSet(patchSetInfoFactory.get(ctx.getDb(), ctx.getNotes(), latest));
+      ctx.getChange().setCurrentPatchSet(patchSetInfoFactory.get(ctx.getNotes(), latest));
       return true;
     }
   }
diff --git a/java/com/google/gerrit/server/change/PatchSetInserter.java b/java/com/google/gerrit/server/change/PatchSetInserter.java
index 24c4237..ca2f6a2 100644
--- a/java/com/google/gerrit/server/change/PatchSetInserter.java
+++ b/java/com/google/gerrit/server/change/PatchSetInserter.java
@@ -233,24 +233,17 @@
 
     List<String> newGroups = groups;
     if (newGroups.isEmpty()) {
-      PatchSet prevPs = psUtil.current(db, ctx.getNotes());
+      PatchSet prevPs = psUtil.current(ctx.getNotes());
       if (prevPs != null) {
         newGroups = prevPs.getGroups();
       }
     }
     patchSet =
         psUtil.insert(
-            db,
-            ctx.getRevWalk(),
-            ctx.getUpdate(psId),
-            psId,
-            commitId,
-            newGroups,
-            null,
-            description);
+            ctx.getRevWalk(), ctx.getUpdate(psId), psId, commitId, newGroups, null, description);
 
     if (notify != NotifyHandling.NONE) {
-      oldReviewers = approvalsUtil.getReviewers(db, ctx.getNotes());
+      oldReviewers = approvalsUtil.getReviewers(ctx.getNotes());
     }
 
     if (message != null) {
@@ -275,7 +268,7 @@
           db, ctx.getNotes(), patchSet, ctx.getRevWalk(), ctx.getRepoView().getConfig());
     }
     if (changeMessage != null) {
-      cmUtil.addChangeMessage(db, update, changeMessage);
+      cmUtil.addChangeMessage(update, changeMessage);
     }
     return true;
   }
diff --git a/java/com/google/gerrit/server/change/PureRevert.java b/java/com/google/gerrit/server/change/PureRevert.java
index ddc9661..14829ea 100644
--- a/java/com/google/gerrit/server/change/PureRevert.java
+++ b/java/com/google/gerrit/server/change/PureRevert.java
@@ -70,7 +70,7 @@
 
   public PureRevertInfo get(ChangeNotes notes, @Nullable String claimedOriginal)
       throws OrmException, IOException, BadRequestException, ResourceConflictException {
-    PatchSet currentPatchSet = psUtil.current(dbProvider.get(), notes);
+    PatchSet currentPatchSet = psUtil.current(notes);
     if (currentPatchSet == null) {
       throw new ResourceConflictException("current revision is missing");
     }
@@ -81,7 +81,6 @@
       }
       PatchSet ps =
           psUtil.current(
-              dbProvider.get(),
               notesFactory.createChecked(
                   dbProvider.get(), notes.getProjectName(), notes.getChange().getRevertOf()));
       claimedOriginal = ps.getRevision().get();
diff --git a/java/com/google/gerrit/server/change/RebaseUtil.java b/java/com/google/gerrit/server/change/RebaseUtil.java
index 22f98b8..8b7c36e 100644
--- a/java/com/google/gerrit/server/change/RebaseUtil.java
+++ b/java/com/google/gerrit/server/change/RebaseUtil.java
@@ -89,8 +89,6 @@
   }
 
   public Base parseBase(RevisionResource rsrc, String base) throws OrmException {
-    ReviewDb db = dbProvider.get();
-
     // Try parsing the base as a ref string.
     PatchSet.Id basePatchSetId = PatchSet.Id.fromRef(base);
     if (basePatchSetId != null) {
@@ -98,8 +96,7 @@
       ChangeNotes baseNotes = notesFor(rsrc, baseChangeId);
       if (baseNotes != null) {
         return Base.create(
-            notesFor(rsrc, basePatchSetId.getParentKey()),
-            psUtil.get(db, baseNotes, basePatchSetId));
+            notesFor(rsrc, basePatchSetId.getParentKey()), psUtil.get(baseNotes, basePatchSetId));
       }
     }
 
@@ -108,7 +105,7 @@
     if (baseChangeId != null) {
       ChangeNotes baseNotes = notesFor(rsrc, new Change.Id(baseChangeId));
       if (baseNotes != null) {
-        return Base.create(baseNotes, psUtil.current(db, baseNotes));
+        return Base.create(baseNotes, psUtil.current(baseNotes));
       }
     }
 
diff --git a/java/com/google/gerrit/server/change/SetAssigneeOp.java b/java/com/google/gerrit/server/change/SetAssigneeOp.java
index f61e95f..dd24ff6 100644
--- a/java/com/google/gerrit/server/change/SetAssigneeOp.java
+++ b/java/com/google/gerrit/server/change/SetAssigneeOp.java
@@ -99,7 +99,7 @@
     return true;
   }
 
-  private void addMessage(ChangeContext ctx, ChangeUpdate update) throws OrmException {
+  private void addMessage(ChangeContext ctx, ChangeUpdate update) {
     StringBuilder msg = new StringBuilder();
     msg.append("Assignee ");
     if (oldAssignee == null) {
@@ -113,7 +113,7 @@
     }
     ChangeMessage cmsg =
         ChangeMessagesUtil.newMessage(ctx, msg.toString(), ChangeMessagesUtil.TAG_SET_ASSIGNEE);
-    cmUtil.addChangeMessage(ctx.getDb(), update, cmsg);
+    cmUtil.addChangeMessage(update, cmsg);
   }
 
   @Override
diff --git a/java/com/google/gerrit/server/change/SetHashtagsOp.java b/java/com/google/gerrit/server/change/SetHashtagsOp.java
index d11b2df..2c180ed 100644
--- a/java/com/google/gerrit/server/change/SetHashtagsOp.java
+++ b/java/com/google/gerrit/server/change/SetHashtagsOp.java
@@ -125,13 +125,13 @@
     }
   }
 
-  private void addMessage(ChangeContext ctx, ChangeUpdate update) throws OrmException {
+  private void addMessage(ChangeContext ctx, ChangeUpdate update) {
     StringBuilder msg = new StringBuilder();
     appendHashtagMessage(msg, "added", toAdd);
     appendHashtagMessage(msg, "removed", toRemove);
     ChangeMessage cmsg =
         ChangeMessagesUtil.newMessage(ctx, msg.toString(), ChangeMessagesUtil.TAG_SET_HASHTAGS);
-    cmUtil.addChangeMessage(ctx.getDb(), update, cmsg);
+    cmUtil.addChangeMessage(update, cmsg);
   }
 
   private void appendHashtagMessage(StringBuilder b, String action, Set<String> hashtags) {
diff --git a/java/com/google/gerrit/server/change/WorkInProgressOp.java b/java/com/google/gerrit/server/change/WorkInProgressOp.java
index 35b4e6e..1da6d16 100644
--- a/java/com/google/gerrit/server/change/WorkInProgressOp.java
+++ b/java/com/google/gerrit/server/change/WorkInProgressOp.java
@@ -123,7 +123,7 @@
   public boolean updateChange(ChangeContext ctx) throws OrmException {
     change = ctx.getChange();
     notes = ctx.getNotes();
-    ps = psUtil.get(ctx.getDb(), ctx.getNotes(), change.currentPatchSetId());
+    ps = psUtil.get(ctx.getNotes(), change.currentPatchSetId());
     ChangeUpdate update = ctx.getUpdate(change.currentPatchSetId());
     change.setWorkInProgress(workInProgress);
     if (!change.hasReviewStarted() && !workInProgress) {
@@ -135,7 +135,7 @@
     return true;
   }
 
-  private void addMessage(ChangeContext ctx, ChangeUpdate update) throws OrmException {
+  private void addMessage(ChangeContext ctx, ChangeUpdate update) {
     Change c = ctx.getChange();
     StringBuilder buf =
         new StringBuilder(c.isWorkInProgress() ? "Set Work In Progress" : "Set Ready For Review");
@@ -154,7 +154,7 @@
                 ? ChangeMessagesUtil.TAG_SET_WIP
                 : ChangeMessagesUtil.TAG_SET_READY);
 
-    cmUtil.addChangeMessage(ctx.getDb(), update, cmsg);
+    cmUtil.addChangeMessage(update, cmsg);
   }
 
   @Override
diff --git a/java/com/google/gerrit/server/edit/ChangeEditModifier.java b/java/com/google/gerrit/server/edit/ChangeEditModifier.java
index ce359a9..a1f654c 100644
--- a/java/com/google/gerrit/server/edit/ChangeEditModifier.java
+++ b/java/com/google/gerrit/server/edit/ChangeEditModifier.java
@@ -457,7 +457,7 @@
   }
 
   private PatchSet lookupCurrentPatchSet(ChangeNotes notes) throws OrmException {
-    return patchSetUtil.current(reviewDb.get(), notes);
+    return patchSetUtil.current(notes);
   }
 
   private static boolean isBasedOn(ChangeEdit changeEdit, PatchSet patchSet) {
diff --git a/java/com/google/gerrit/server/edit/ChangeEditUtil.java b/java/com/google/gerrit/server/edit/ChangeEditUtil.java
index d5add76..9e267ac 100644
--- a/java/com/google/gerrit/server/edit/ChangeEditUtil.java
+++ b/java/com/google/gerrit/server/edit/ChangeEditUtil.java
@@ -238,8 +238,7 @@
       int pos = ref.getName().lastIndexOf('/');
       checkArgument(pos > 0, "invalid edit ref: %s", ref.getName());
       String psId = ref.getName().substring(pos + 1);
-      return psUtil.get(
-          db.get(), notes, new PatchSet.Id(notes.getChange().getId(), Integer.parseInt(psId)));
+      return psUtil.get(notes, new PatchSet.Id(notes.getChange().getId(), Integer.parseInt(psId)));
     } catch (OrmException | NumberFormatException e) {
       throw new IOException(e);
     }
diff --git a/java/com/google/gerrit/server/events/EventFactory.java b/java/com/google/gerrit/server/events/EventFactory.java
index 40ad144..25b96c8 100644
--- a/java/com/google/gerrit/server/events/EventFactory.java
+++ b/java/com/google/gerrit/server/events/EventFactory.java
@@ -222,9 +222,8 @@
    * @param a
    * @param notes
    */
-  public void addAllReviewers(ReviewDb db, ChangeAttribute a, ChangeNotes notes)
-      throws OrmException {
-    Collection<Account.Id> reviewers = approvalsUtil.getReviewers(db, notes).all();
+  public void addAllReviewers(ChangeAttribute a, ChangeNotes notes) throws OrmException {
+    Collection<Account.Id> reviewers = approvalsUtil.getReviewers(notes).all();
     if (!reviewers.isEmpty()) {
       a.allReviewers = Lists.newArrayListWithCapacity(reviewers.size());
       for (Account.Id id : reviewers) {
diff --git a/java/com/google/gerrit/server/events/StreamEventsApiListener.java b/java/com/google/gerrit/server/events/StreamEventsApiListener.java
index 972266a..04abb96 100644
--- a/java/com/google/gerrit/server/events/StreamEventsApiListener.java
+++ b/java/com/google/gerrit/server/events/StreamEventsApiListener.java
@@ -45,7 +45,6 @@
 import com.google.gerrit.reviewdb.client.Branch;
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.PatchSet;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.PatchSetUtil;
 import com.google.gerrit.server.data.AccountAttribute;
 import com.google.gerrit.server.data.ApprovalAttribute;
@@ -60,7 +59,6 @@
 import com.google.gwtorm.server.OrmException;
 import com.google.inject.AbstractModule;
 import com.google.inject.Inject;
-import com.google.inject.Provider;
 import com.google.inject.Singleton;
 import java.io.IOException;
 import java.util.Collection;
@@ -117,7 +115,6 @@
   }
 
   private final PluginItemContext<EventDispatcher> dispatcher;
-  private final Provider<ReviewDb> db;
   private final EventFactory eventFactory;
   private final ProjectCache projectCache;
   private final GitRepositoryManager repoManager;
@@ -127,14 +124,12 @@
   @Inject
   StreamEventsApiListener(
       PluginItemContext<EventDispatcher> dispatcher,
-      Provider<ReviewDb> db,
       EventFactory eventFactory,
       ProjectCache projectCache,
       GitRepositoryManager repoManager,
       PatchSetUtil psUtil,
       ChangeNotes.Factory changeNotesFactory) {
     this.dispatcher = dispatcher;
-    this.db = db;
     this.eventFactory = eventFactory;
     this.projectCache = projectCache;
     this.repoManager = repoManager;
@@ -151,7 +146,7 @@
   }
 
   private PatchSet getPatchSet(ChangeNotes notes, RevisionInfo info) throws OrmException {
-    return psUtil.get(db.get(), notes, PatchSet.Id.fromRef(info.ref));
+    return psUtil.get(notes, PatchSet.Id.fromRef(info.ref));
   }
 
   private Supplier<ChangeAttribute> changeAttributeSupplier(Change change, ChangeNotes notes) {
@@ -311,7 +306,7 @@
       Change change = notes.getChange();
       ReviewerDeletedEvent event = new ReviewerDeletedEvent(change);
       event.change = changeAttributeSupplier(change, notes);
-      event.patchSet = patchSetAttributeSupplier(change, psUtil.current(db.get(), notes));
+      event.patchSet = patchSetAttributeSupplier(change, psUtil.current(notes));
       event.reviewer = accountAttributeSupplier(ev.getReviewer());
       event.remover = accountAttributeSupplier(ev.getWho());
       event.comment = ev.getComment();
@@ -332,7 +327,7 @@
       ReviewerAddedEvent event = new ReviewerAddedEvent(change);
 
       event.change = changeAttributeSupplier(change, notes);
-      event.patchSet = patchSetAttributeSupplier(change, psUtil.current(db.get(), notes));
+      event.patchSet = patchSetAttributeSupplier(change, psUtil.current(notes));
       for (AccountInfo reviewer : ev.getReviewers()) {
         event.reviewer = accountAttributeSupplier(reviewer);
         dispatcher.run(d -> d.postEvent(event));
@@ -420,7 +415,7 @@
 
       event.change = changeAttributeSupplier(change, notes);
       event.restorer = accountAttributeSupplier(ev.getWho());
-      event.patchSet = patchSetAttributeSupplier(change, psUtil.current(db.get(), notes));
+      event.patchSet = patchSetAttributeSupplier(change, psUtil.current(notes));
       event.reason = ev.getReason();
 
       dispatcher.run(d -> d.postEvent(change, event));
@@ -438,7 +433,7 @@
 
       event.change = changeAttributeSupplier(change, notes);
       event.submitter = accountAttributeSupplier(ev.getWho());
-      event.patchSet = patchSetAttributeSupplier(change, psUtil.current(db.get(), notes));
+      event.patchSet = patchSetAttributeSupplier(change, psUtil.current(notes));
       event.newRev = ev.getNewRevisionId();
 
       dispatcher.run(d -> d.postEvent(change, event));
@@ -456,7 +451,7 @@
 
       event.change = changeAttributeSupplier(change, notes);
       event.abandoner = accountAttributeSupplier(ev.getWho());
-      event.patchSet = patchSetAttributeSupplier(change, psUtil.current(db.get(), notes));
+      event.patchSet = patchSetAttributeSupplier(change, psUtil.current(notes));
       event.reason = ev.getReason();
 
       dispatcher.run(d -> d.postEvent(change, event));
@@ -509,7 +504,7 @@
       VoteDeletedEvent event = new VoteDeletedEvent(change);
 
       event.change = changeAttributeSupplier(change, notes);
-      event.patchSet = patchSetAttributeSupplier(change, psUtil.current(db.get(), notes));
+      event.patchSet = patchSetAttributeSupplier(change, psUtil.current(notes));
       event.comment = ev.getMessage();
       event.reviewer = accountAttributeSupplier(ev.getReviewer());
       event.remover = accountAttributeSupplier(ev.getWho());
diff --git a/java/com/google/gerrit/server/git/GroupCollector.java b/java/com/google/gerrit/server/git/GroupCollector.java
index bb65fa8..88632e6 100644
--- a/java/com/google/gerrit/server/git/GroupCollector.java
+++ b/java/com/google/gerrit/server/git/GroupCollector.java
@@ -117,7 +117,7 @@
           public List<String> lookup(PatchSet.Id psId) throws OrmException {
             // TODO(dborowitz): Reuse open repository from caller.
             ChangeNotes notes = notesFactory.createChecked(db, project, psId.getParentKey());
-            PatchSet ps = psUtil.get(db, notes, psId);
+            PatchSet ps = psUtil.get(notes, psId);
             return ps != null ? ps.getGroups() : null;
           }
         });
diff --git a/java/com/google/gerrit/server/git/MergedByPushOp.java b/java/com/google/gerrit/server/git/MergedByPushOp.java
index b3a1d72..06d4e82 100644
--- a/java/com/google/gerrit/server/git/MergedByPushOp.java
+++ b/java/com/google/gerrit/server/git/MergedByPushOp.java
@@ -120,7 +120,7 @@
     } else {
       patchSet =
           requireNonNull(
-              psUtil.get(ctx.getDb(), ctx.getNotes(), psId),
+              psUtil.get(ctx.getNotes(), psId),
               () -> String.format("patch set %s not found", psId));
     }
     info = getPatchSetInfo(ctx);
@@ -151,7 +151,7 @@
     ChangeMessage msg =
         ChangeMessagesUtil.newMessage(
             psId, ctx.getUser(), ctx.getWhen(), msgBuf.toString(), ChangeMessagesUtil.TAG_MERGED);
-    cmUtil.addChangeMessage(ctx.getDb(), update, msg);
+    cmUtil.addChangeMessage(update, msg);
 
     PatchSetApproval submitter =
         ApprovalsUtil.newApproval(
diff --git a/java/com/google/gerrit/server/git/receive/ReceiveCommits.java b/java/com/google/gerrit/server/git/receive/ReceiveCommits.java
index 29c2ca0..32fbd36 100644
--- a/java/com/google/gerrit/server/git/receive/ReceiveCommits.java
+++ b/java/com/google/gerrit/server/git/receive/ReceiveCommits.java
@@ -611,7 +611,6 @@
       newProgress.end();
       replaceProgress.end();
       queueSuccessMessages(newChanges);
-      refsPublishDeprecationWarning();
 
       logger.atFine().log(
           "Command results: %s",
@@ -619,13 +618,6 @@
     }
   }
 
-  private void refsPublishDeprecationWarning() {
-    // TODO(xchangcheng): remove after migrating tools which are using this magic branch.
-    if (magicBranch != null && magicBranch.publish) {
-      addMessage("Pushing to refs/publish/* is deprecated, use refs/for/* instead.");
-    }
-  }
-
   private void sendErrorMessages() {
     if (!errors.isEmpty()) {
       logger.atFine().log("Handling error conditions: %s", errors.keySet());
@@ -1362,8 +1354,6 @@
                 + "for new changes and '--edit' for existing changes")
     boolean draft;
 
-    boolean publish;
-
     @Option(name = "--private", usage = "mark new/updated change as private")
     boolean isPrivate;
 
@@ -1501,7 +1491,6 @@
       this.deprecatedTopicSeen = false;
       this.cmd = cmd;
       this.draft = cmd.getRefName().startsWith(MagicBranch.NEW_DRAFT_CHANGE);
-      this.publish = cmd.getRefName().startsWith(MagicBranch.NEW_PUBLISH_CHANGE);
       this.labelTypes = labelTypes;
       this.notesMigration = notesMigration;
       GeneralPreferencesInfo prefs = user.state().getGeneralPreferences();
@@ -2892,7 +2881,7 @@
           new BatchUpdateOp() {
             @Override
             public boolean updateChange(ChangeContext ctx) throws OrmException {
-              PatchSet ps = psUtil.get(ctx.getDb(), ctx.getNotes(), psId);
+              PatchSet ps = psUtil.get(ctx.getNotes(), psId);
               List<String> oldGroups = ps.getGroups();
               if (oldGroups == null) {
                 if (groups == null) {
@@ -2901,7 +2890,7 @@
               } else if (sameGroups(oldGroups, groups)) {
                 return false;
               }
-              psUtil.setGroups(ctx.getDb(), ctx.getUpdate(psId), ps, groups);
+              psUtil.setGroups(ctx.getUpdate(psId), ps, groups);
               return true;
             }
           });
diff --git a/java/com/google/gerrit/server/git/receive/ReplaceOp.java b/java/com/google/gerrit/server/git/receive/ReplaceOp.java
index a580cf6..d2ef12c 100644
--- a/java/com/google/gerrit/server/git/receive/ReplaceOp.java
+++ b/java/com/google/gerrit/server/git/receive/ReplaceOp.java
@@ -255,7 +255,7 @@
       return false;
     }
     if (groups.isEmpty()) {
-      PatchSet prevPs = psUtil.current(ctx.getDb(), notes);
+      PatchSet prevPs = psUtil.current(notes);
       groups = prevPs != null ? prevPs.getGroups() : ImmutableList.<String>of();
     }
 
@@ -305,7 +305,6 @@
 
     newPatchSet =
         psUtil.insert(
-            ctx.getDb(),
             ctx.getRevWalk(),
             update,
             patchSetId,
@@ -353,7 +352,7 @@
     }
 
     msg = createChangeMessage(ctx, reviewMessage);
-    cmUtil.addChangeMessage(ctx.getDb(), update, msg);
+    cmUtil.addChangeMessage(update, msg);
 
     if (mergedByPushOp == null) {
       resetChange(ctx);
@@ -512,7 +511,7 @@
   private List<Comment> publishComments(ChangeContext ctx, boolean workInProgress)
       throws OrmException {
     List<Comment> comments =
-        commentsUtil.draftByChangeAuthor(ctx.getDb(), ctx.getNotes(), ctx.getUser().getAccountId());
+        commentsUtil.draftByChangeAuthor(ctx.getNotes(), ctx.getUser().getAccountId());
     publishCommentUtil.publish(
         ctx, patchSetId, comments, ChangeMessagesUtil.uploadedPatchSetTag(workInProgress));
     return comments;
diff --git a/java/com/google/gerrit/server/index/change/AllChangesIndexer.java b/java/com/google/gerrit/server/index/change/AllChangesIndexer.java
index 37e288c..8f1433e 100644
--- a/java/com/google/gerrit/server/index/change/AllChangesIndexer.java
+++ b/java/com/google/gerrit/server/index/change/AllChangesIndexer.java
@@ -224,7 +224,7 @@
         // It does mean that reindexing after invalidating the DiffSummary cache will be expensive,
         // but the goal is to invalidate that cache as infrequently as we possibly can. And besides,
         // we don't have concrete proof that improving packfile locality would help.
-        notesFactory.scan(repo, db, project).forEach(r -> index(db, r));
+        notesFactory.scan(repo, project).forEach(r -> index(db, r));
       } catch (RepositoryNotFoundException rnfe) {
         logger.atSevere().log(rnfe.getMessage());
       }
diff --git a/java/com/google/gerrit/server/mail/receive/MailProcessor.java b/java/com/google/gerrit/server/mail/receive/MailProcessor.java
index 262e82b..b39f4e3 100644
--- a/java/com/google/gerrit/server/mail/receive/MailProcessor.java
+++ b/java/com/google/gerrit/server/mail/receive/MailProcessor.java
@@ -283,14 +283,14 @@
     @Override
     public boolean updateChange(ChangeContext ctx)
         throws OrmException, UnprocessableEntityException, PatchListNotAvailableException {
-      patchSet = psUtil.get(ctx.getDb(), ctx.getNotes(), psId);
+      patchSet = psUtil.get(ctx.getNotes(), psId);
       notes = ctx.getNotes();
       if (patchSet == null) {
         throw new OrmException("patch set not found: " + psId);
       }
 
       changeMessage = generateChangeMessage(ctx);
-      changeMessagesUtil.addChangeMessage(ctx.getDb(), ctx.getUpdate(psId), changeMessage);
+      changeMessagesUtil.addChangeMessage(ctx.getUpdate(psId), changeMessage);
 
       comments = new ArrayList<>();
       for (MailComment c : parsedComments) {
@@ -301,10 +301,7 @@
             persistentCommentFromMailComment(ctx, c, targetPatchSetForComment(ctx, c, patchSet)));
       }
       commentsUtil.putComments(
-          ctx.getDb(),
-          ctx.getUpdate(ctx.getChange().currentPatchSetId()),
-          Status.PUBLISHED,
-          comments);
+          ctx.getUpdate(ctx.getChange().currentPatchSetId()), Status.PUBLISHED, comments);
 
       return true;
     }
@@ -369,7 +366,6 @@
         ChangeContext ctx, MailComment mailComment, PatchSet current) throws OrmException {
       if (mailComment.getInReplyTo() != null) {
         return psUtil.get(
-            ctx.getDb(),
             ctx.getNotes(),
             new PatchSet.Id(ctx.getChange().getId(), mailComment.getInReplyTo().key.patchSetId));
       }
diff --git a/java/com/google/gerrit/server/mail/send/ChangeEmail.java b/java/com/google/gerrit/server/mail/send/ChangeEmail.java
index 0b8a3c1..84576f6 100644
--- a/java/com/google/gerrit/server/mail/send/ChangeEmail.java
+++ b/java/com/google/gerrit/server/mail/send/ChangeEmail.java
@@ -159,8 +159,7 @@
       setHeader(MailHeader.PATCH_SET.fieldName(), patchSet.getPatchSetId() + "");
       if (patchSetInfo == null) {
         try {
-          patchSetInfo =
-              args.patchSetInfoFactory.get(args.db.get(), changeData.notes(), patchSet.getId());
+          patchSetInfo = args.patchSetInfoFactory.get(changeData.notes(), patchSet.getId());
         } catch (PatchSetInfoNotAvailableException | OrmException err) {
           patchSetInfo = null;
         }
diff --git a/java/com/google/gerrit/server/mail/send/CommentSender.java b/java/com/google/gerrit/server/mail/send/CommentSender.java
index e810397..c8aa259 100644
--- a/java/com/google/gerrit/server/mail/send/CommentSender.java
+++ b/java/com/google/gerrit/server/mail/send/CommentSender.java
@@ -316,7 +316,7 @@
 
     Comment.Key key = new Comment.Key(child.parentUuid, child.key.filename, child.key.patchSetId);
     try {
-      return commentsUtil.getPublished(args.db.get(), changeData.notes(), key);
+      return commentsUtil.getPublished(changeData.notes(), key);
     } catch (OrmException e) {
       logger.atWarning().log("Could not find the parent of this comment: %s", child);
       return Optional.empty();
diff --git a/java/com/google/gerrit/server/notedb/ChangeNotes.java b/java/com/google/gerrit/server/notedb/ChangeNotes.java
index 257aebb..e5e0d51 100644
--- a/java/com/google/gerrit/server/notedb/ChangeNotes.java
+++ b/java/com/google/gerrit/server/notedb/ChangeNotes.java
@@ -27,14 +27,12 @@
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.ImmutableSortedMap;
 import com.google.common.collect.ImmutableSortedSet;
-import com.google.common.collect.Iterators;
 import com.google.common.collect.ListMultimap;
 import com.google.common.collect.MultimapBuilder;
 import com.google.common.collect.Multimaps;
 import com.google.common.collect.Ordering;
 import com.google.common.collect.Sets;
 import com.google.common.collect.Sets.SetView;
-import com.google.common.collect.Streams;
 import com.google.common.flogger.FluentLogger;
 import com.google.gerrit.common.Nullable;
 import com.google.gerrit.common.data.SubmitRecord;
@@ -72,7 +70,6 @@
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
-import java.util.Set;
 import java.util.function.Predicate;
 import java.util.stream.Stream;
 import org.eclipse.jgit.errors.ConfigInvalidException;
@@ -273,7 +270,7 @@
       if (args.migration.readChanges()) {
         for (Project.NameKey project : projectCache.all()) {
           try (Repository repo = args.repoManager.openRepository(project)) {
-            scanNoteDb(repo, db, project)
+            scan(repo, project)
                 .filter(r -> !r.error().isPresent())
                 .map(ChangeNotesResult::notes)
                 .filter(predicate)
@@ -291,79 +288,23 @@
       return ImmutableListMultimap.copyOf(m);
     }
 
-    public Stream<ChangeNotesResult> scan(Repository repo, ReviewDb db, Project.NameKey project)
+    public Stream<ChangeNotesResult> scan(Repository repo, Project.NameKey project)
         throws IOException {
-      return args.migration.readChanges() ? scanNoteDb(repo, db, project) : scanReviewDb(repo, db);
-    }
-
-    private Stream<ChangeNotesResult> scanReviewDb(Repository repo, ReviewDb db)
-        throws IOException {
-      // Scan IDs that might exist in ReviewDb, assuming that each change has at least one patch set
-      // ref. Not all changes might exist: some patch set refs might have been written where the
-      // corresponding ReviewDb write failed. These will be silently filtered out by the batch get
-      // call below, which is intended.
-      Set<Change.Id> ids = scanChangeIds(repo).fromPatchSetRefs();
-
-      // A batch size of N may overload get(Iterable), so use something smaller, but still >1.
-      return Streams.stream(Iterators.partition(ids.iterator(), 30))
-          .flatMap(
-              batch -> {
-                try {
-                  return Streams.stream(ReviewDbUtil.unwrapDb(db).changes().get(batch))
-                      .map(this::toResult)
-                      .filter(Objects::nonNull);
-                } catch (OrmException e) {
-                  // Return this error for each Id in the input batch.
-                  return batch.stream().map(id -> ChangeNotesResult.error(id, e));
-                }
-              });
-    }
-
-    private Stream<ChangeNotesResult> scanNoteDb(
-        Repository repo, ReviewDb db, Project.NameKey project) throws IOException {
       ScanResult sr = scanChangeIds(repo);
-      PrimaryStorage defaultStorage = args.migration.changePrimaryStorage();
 
-      return sr.all()
-          .stream()
-          .map(id -> scanOneNoteDbChange(db, project, sr, defaultStorage, id))
-          .filter(Objects::nonNull);
+      return sr.all().stream().map(id -> scanOneChange(project, sr, id)).filter(Objects::nonNull);
     }
 
-    private ChangeNotesResult scanOneNoteDbChange(
-        ReviewDb db,
-        Project.NameKey project,
-        ScanResult sr,
-        PrimaryStorage defaultStorage,
-        Change.Id id) {
-      Change change;
-      try {
-        change = readOneReviewDbChange(db, id);
-      } catch (OrmException e) {
-        return ChangeNotesResult.error(id, e);
-      }
-
-      if (change == null) {
-        if (!sr.fromMetaRefs().contains(id)) {
-          // Stray patch set refs can happen due to normal error conditions, e.g. failed
-          // push processing, so aren't worth even a warning.
-          return null;
-        }
-        if (defaultStorage == PrimaryStorage.REVIEW_DB) {
-          // If changes should exist in ReviewDb, it's worth warning about a meta ref with
-          // no corresponding ReviewDb data.
-          logger.atWarning().log(
-              "skipping change %s found in project %s but not in ReviewDb", id, project);
-          return null;
-        }
-        // TODO(dborowitz): See discussion in NoteDbBatchUpdate#newChangeContext.
-        change = ChangeNotes.Factory.newNoteDbOnlyChange(project, id);
-      } else if (!change.getProject().equals(project)) {
-        logger.atSevere().log(
-            "skipping change %s found in project %s because ReviewDb change has project %s",
-            id, project, change.getProject());
+    private ChangeNotesResult scanOneChange(Project.NameKey project, ScanResult sr, Change.Id id) {
+      if (!sr.fromMetaRefs().contains(id)) {
+        // Stray patch set refs can happen due to normal error conditions, e.g. failed
+        // push processing, so aren't worth even a warning.
         return null;
       }
+
+      // TODO(dborowitz): See discussion in NoteDbBatchUpdate#newChangeContext.
+      Change change = ChangeNotes.Factory.newNoteDbOnlyChange(project, id);
+
       logger.atFine().log("adding change %s found in project %s", id, project);
       return toResult(change);
     }
@@ -379,7 +320,7 @@
       return ChangeNotesResult.notes(n);
     }
 
-    /** Result of {@link #scan(Repository, ReviewDb, Project.NameKey)}. */
+    /** Result of {@link #scan(Repository,Project.NameKey)}. */
     @AutoValue
     public abstract static class ChangeNotesResult {
       static ChangeNotesResult error(Change.Id id, OrmException e) {
diff --git a/java/com/google/gerrit/server/patch/PatchScriptFactory.java b/java/com/google/gerrit/server/patch/PatchScriptFactory.java
index b1e0e3c..c583729 100644
--- a/java/com/google/gerrit/server/patch/PatchScriptFactory.java
+++ b/java/com/google/gerrit/server/patch/PatchScriptFactory.java
@@ -200,8 +200,8 @@
     }
     validatePatchSetId(psb);
 
-    PatchSet psEntityA = psa != null ? psUtil.get(db, notes, psa) : null;
-    PatchSet psEntityB = psb.get() == 0 ? new PatchSet(psb) : psUtil.get(db, notes, psb);
+    PatchSet psEntityA = psa != null ? psUtil.get(notes, psa) : null;
+    PatchSet psEntityB = psb.get() == 0 ? new PatchSet(psb) : psUtil.get(notes, psb);
     if (psEntityA != null || psEntityB != null) {
       try {
         permissionBackend.currentUser().change(notes).database(db).check(ChangePermission.READ);
@@ -308,7 +308,7 @@
       // proper rename detection between the patch sets.
       //
       history = new ArrayList<>();
-      for (PatchSet ps : psUtil.byChange(db, notes)) {
+      for (PatchSet ps : psUtil.byChange(notes)) {
         String name = fileName;
         if (psa != null) {
           switch (changeType) {
@@ -391,7 +391,7 @@
   }
 
   private void loadPublished(Map<Patch.Key, Patch> byKey, String file) throws OrmException {
-    for (Comment c : commentsUtil.publishedByChangeFile(db, notes, changeId, file)) {
+    for (Comment c : commentsUtil.publishedByChangeFile(notes, file)) {
       comments.include(notes.getChangeId(), c);
       PatchSet.Id psId = new PatchSet.Id(notes.getChangeId(), c.key.patchSetId);
       Patch.Key pKey = new Patch.Key(psId, c.key.filename);
@@ -404,7 +404,7 @@
 
   private void loadDrafts(Map<Patch.Key, Patch> byKey, Account.Id me, String file)
       throws OrmException {
-    for (Comment c : commentsUtil.draftByChangeFileAuthor(db, notes, file, me)) {
+    for (Comment c : commentsUtil.draftByChangeFileAuthor(notes, file, me)) {
       comments.include(notes.getChangeId(), c);
       PatchSet.Id psId = new PatchSet.Id(notes.getChangeId(), c.key.patchSetId);
       Patch.Key pKey = new Patch.Key(psId, c.key.filename);
diff --git a/java/com/google/gerrit/server/patch/PatchSetInfoFactory.java b/java/com/google/gerrit/server/patch/PatchSetInfoFactory.java
index 41bade6..f11f116 100644
--- a/java/com/google/gerrit/server/patch/PatchSetInfoFactory.java
+++ b/java/com/google/gerrit/server/patch/PatchSetInfoFactory.java
@@ -20,7 +20,6 @@
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.reviewdb.client.RevId;
 import com.google.gerrit.reviewdb.client.UserIdentity;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.PatchSetUtil;
 import com.google.gerrit.server.account.Emails;
 import com.google.gerrit.server.git.GitRepositoryManager;
@@ -66,10 +65,10 @@
     return info;
   }
 
-  public PatchSetInfo get(ReviewDb db, ChangeNotes notes, PatchSet.Id psId)
+  public PatchSetInfo get(ChangeNotes notes, PatchSet.Id psId)
       throws PatchSetInfoNotAvailableException {
     try {
-      PatchSet patchSet = psUtil.get(db, notes, psId);
+      PatchSet patchSet = psUtil.get(notes, psId);
       return get(notes.getProjectName(), patchSet);
     } catch (OrmException e) {
       throw new PatchSetInfoNotAvailableException(e);
diff --git a/java/com/google/gerrit/server/permissions/DefaultRefFilter.java b/java/com/google/gerrit/server/permissions/DefaultRefFilter.java
index 47be6e3..249c872 100644
--- a/java/com/google/gerrit/server/permissions/DefaultRefFilter.java
+++ b/java/com/google/gerrit/server/permissions/DefaultRefFilter.java
@@ -345,7 +345,7 @@
     Project.NameKey p = projectState.getNameKey();
     Stream<ChangeNotesResult> s;
     try {
-      s = changeNotesFactory.scan(repo, db.get(), p);
+      s = changeNotesFactory.scan(repo, p);
     } catch (IOException e) {
       logger.atSevere().withCause(e).log(
           "Cannot load changes for project %s, assuming no changes are visible", p);
diff --git a/java/com/google/gerrit/server/query/change/ChangeData.java b/java/com/google/gerrit/server/query/change/ChangeData.java
index 0f5d938..4df953e 100644
--- a/java/com/google/gerrit/server/query/change/ChangeData.java
+++ b/java/com/google/gerrit/server/query/change/ChangeData.java
@@ -714,7 +714,7 @@
    */
   public Collection<PatchSet> patchSets() throws OrmException {
     if (patchSets == null) {
-      patchSets = psUtil.byChange(db, notes());
+      patchSets = psUtil.byChange(notes());
     }
     return patchSets;
   }
@@ -750,7 +750,7 @@
       if (!lazyLoad) {
         return ImmutableListMultimap.of();
       }
-      allApprovals = approvalsUtil.byChange(db, notes());
+      allApprovals = approvalsUtil.byChange(notes());
     }
     return allApprovals;
   }
@@ -858,7 +858,7 @@
       if (!lazyLoad) {
         return Collections.emptyList();
       }
-      publishedComments = commentsUtil.publishedByChange(db, notes());
+      publishedComments = commentsUtil.publishedByChange(notes());
     }
     return publishedComments;
   }
@@ -949,7 +949,7 @@
       if (!lazyLoad) {
         return Collections.emptyList();
       }
-      messages = cmUtil.byChange(db, notes());
+      messages = cmUtil.byChange(notes());
     }
     return messages;
   }
@@ -1097,7 +1097,7 @@
           }
         }
       } else {
-        for (Comment sc : commentsUtil.draftByChange(db, notes())) {
+        for (Comment sc : commentsUtil.draftByChange(notes())) {
           draftsByUser.put(sc.author.getId(), null);
         }
       }
diff --git a/java/com/google/gerrit/server/query/change/OutputStreamQuery.java b/java/com/google/gerrit/server/query/change/OutputStreamQuery.java
index 17c23b6..a190ac5 100644
--- a/java/com/google/gerrit/server/query/change/OutputStreamQuery.java
+++ b/java/com/google/gerrit/server/query/change/OutputStreamQuery.java
@@ -250,7 +250,7 @@
     }
 
     if (includeAllReviewers) {
-      eventFactory.addAllReviewers(db, c, d.notes());
+      eventFactory.addAllReviewers(c, d.notes());
     }
 
     if (includeSubmitRecords) {
diff --git a/java/com/google/gerrit/server/restapi/account/DeleteDraftComments.java b/java/com/google/gerrit/server/restapi/account/DeleteDraftComments.java
index 108ee0e..16ab812 100644
--- a/java/com/google/gerrit/server/restapi/account/DeleteDraftComments.java
+++ b/java/com/google/gerrit/server/restapi/account/DeleteDraftComments.java
@@ -184,12 +184,11 @@
         throws OrmException, PatchListNotAvailableException, PermissionBackendException {
       ImmutableList.Builder<CommentInfo> comments = ImmutableList.builder();
       boolean dirty = false;
-      for (Comment c : commentsUtil.draftByChangeAuthor(ctx.getDb(), ctx.getNotes(), accountId)) {
+      for (Comment c : commentsUtil.draftByChangeAuthor(ctx.getNotes(), accountId)) {
         dirty = true;
         PatchSet.Id psId = new PatchSet.Id(ctx.getChange().getId(), c.key.patchSetId);
-        setCommentRevId(
-            c, patchListCache, ctx.getChange(), psUtil.get(ctx.getDb(), ctx.getNotes(), psId));
-        commentsUtil.deleteComments(ctx.getDb(), ctx.getUpdate(psId), Collections.singleton(c));
+        setCommentRevId(c, patchListCache, ctx.getChange(), psUtil.get(ctx.getNotes(), psId));
+        commentsUtil.deleteComments(ctx.getUpdate(psId), Collections.singleton(c));
         comments.add(commentFormatter.format(c));
       }
       if (dirty) {
diff --git a/java/com/google/gerrit/server/restapi/change/ChangeIncludedIn.java b/java/com/google/gerrit/server/restapi/change/ChangeIncludedIn.java
index 12b3797..59b3111 100644
--- a/java/com/google/gerrit/server/restapi/change/ChangeIncludedIn.java
+++ b/java/com/google/gerrit/server/restapi/change/ChangeIncludedIn.java
@@ -18,25 +18,21 @@
 import com.google.gerrit.extensions.restapi.RestApiException;
 import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.reviewdb.client.PatchSet;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.PatchSetUtil;
 import com.google.gerrit.server.change.ChangeResource;
 import com.google.gerrit.server.change.IncludedIn;
 import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
-import com.google.inject.Provider;
 import com.google.inject.Singleton;
 import java.io.IOException;
 
 @Singleton
 public class ChangeIncludedIn implements RestReadView<ChangeResource> {
-  private Provider<ReviewDb> db;
   private PatchSetUtil psUtil;
   private IncludedIn includedIn;
 
   @Inject
-  ChangeIncludedIn(Provider<ReviewDb> db, PatchSetUtil psUtil, IncludedIn includedIn) {
-    this.db = db;
+  ChangeIncludedIn(PatchSetUtil psUtil, IncludedIn includedIn) {
     this.psUtil = psUtil;
     this.includedIn = includedIn;
   }
@@ -44,7 +40,7 @@
   @Override
   public IncludedInInfo apply(ChangeResource rsrc)
       throws RestApiException, OrmException, IOException {
-    PatchSet ps = psUtil.current(db.get(), rsrc.getNotes());
+    PatchSet ps = psUtil.current(rsrc.getNotes());
     return includedIn.apply(rsrc.getProject(), ps.getRevision().get());
   }
 }
diff --git a/java/com/google/gerrit/server/restapi/change/CherryPickChange.java b/java/com/google/gerrit/server/restapi/change/CherryPickChange.java
index 6399cde..c7a8a96 100644
--- a/java/com/google/gerrit/server/restapi/change/CherryPickChange.java
+++ b/java/com/google/gerrit/server/restapi/change/CherryPickChange.java
@@ -361,7 +361,7 @@
     if (input.keepReviewers && sourceChange != null) {
       ReviewerSet reviewerSet =
           approvalsUtil.getReviewers(
-              dbProvider.get(), changeNotesFactory.createChecked(dbProvider.get(), sourceChange));
+              changeNotesFactory.createChecked(dbProvider.get(), sourceChange));
       Set<Account.Id> reviewers =
           new HashSet<>(reviewerSet.byState(ReviewerStateInternal.REVIEWER));
       reviewers.add(sourceChange.getOwner());
diff --git a/java/com/google/gerrit/server/restapi/change/Comments.java b/java/com/google/gerrit/server/restapi/change/Comments.java
index f563cc6..22f376b 100644
--- a/java/com/google/gerrit/server/restapi/change/Comments.java
+++ b/java/com/google/gerrit/server/restapi/change/Comments.java
@@ -20,32 +20,27 @@
 import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
 import com.google.gerrit.extensions.restapi.RestView;
 import com.google.gerrit.reviewdb.client.Comment;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.CommentsUtil;
 import com.google.gerrit.server.change.CommentResource;
 import com.google.gerrit.server.change.RevisionResource;
 import com.google.gerrit.server.notedb.ChangeNotes;
 import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
-import com.google.inject.Provider;
 import com.google.inject.Singleton;
 
 @Singleton
 public class Comments implements ChildCollection<RevisionResource, CommentResource> {
   private final DynamicMap<RestView<CommentResource>> views;
   private final ListRevisionComments list;
-  private final Provider<ReviewDb> dbProvider;
   private final CommentsUtil commentsUtil;
 
   @Inject
   Comments(
       DynamicMap<RestView<CommentResource>> views,
       ListRevisionComments list,
-      Provider<ReviewDb> dbProvider,
       CommentsUtil commentsUtil) {
     this.views = views;
     this.list = list;
-    this.dbProvider = dbProvider;
     this.commentsUtil = commentsUtil;
   }
 
@@ -65,8 +60,7 @@
     String uuid = id.get();
     ChangeNotes notes = rev.getNotes();
 
-    for (Comment c :
-        commentsUtil.publishedByPatchSet(dbProvider.get(), notes, rev.getPatchSet().getId())) {
+    for (Comment c : commentsUtil.publishedByPatchSet(notes, rev.getPatchSet().getId())) {
       if (uuid.equals(c.key.uuid)) {
         return new CommentResource(rev, c);
       }
diff --git a/java/com/google/gerrit/server/restapi/change/CreateChange.java b/java/com/google/gerrit/server/restapi/change/CreateChange.java
index fd25658..319a647 100644
--- a/java/com/google/gerrit/server/restapi/change/CreateChange.java
+++ b/java/com/google/gerrit/server/restapi/change/CreateChange.java
@@ -225,7 +225,7 @@
         } catch (AuthException e) {
           throw new UnprocessableEntityException("Read not permitted for " + input.baseChange);
         }
-        PatchSet ps = psUtil.current(db.get(), change);
+        PatchSet ps = psUtil.current(change);
         parentCommit = ObjectId.fromString(ps.getRevision().get());
         groups = ps.getGroups();
       } else if (input.baseCommit != null) {
diff --git a/java/com/google/gerrit/server/restapi/change/CreateDraftComment.java b/java/com/google/gerrit/server/restapi/change/CreateDraftComment.java
index 0e93c55..bab7fb0 100644
--- a/java/com/google/gerrit/server/restapi/change/CreateDraftComment.java
+++ b/java/com/google/gerrit/server/restapi/change/CreateDraftComment.java
@@ -112,7 +112,7 @@
     public boolean updateChange(ChangeContext ctx)
         throws ResourceNotFoundException, OrmException, UnprocessableEntityException,
             PatchListNotAvailableException {
-      PatchSet ps = psUtil.get(ctx.getDb(), ctx.getNotes(), psId);
+      PatchSet ps = psUtil.get(ctx.getNotes(), psId);
       if (ps == null) {
         throw new ResourceNotFoundException("patch set not found: " + psId);
       }
@@ -126,8 +126,7 @@
 
       setCommentRevId(comment, patchListCache, ctx.getChange(), ps);
 
-      commentsUtil.putComments(
-          ctx.getDb(), ctx.getUpdate(psId), Status.DRAFT, Collections.singleton(comment));
+      commentsUtil.putComments(ctx.getUpdate(psId), Status.DRAFT, Collections.singleton(comment));
       ctx.dontBumpLastUpdatedOn();
       return true;
     }
diff --git a/java/com/google/gerrit/server/restapi/change/CreateMergePatchSet.java b/java/com/google/gerrit/server/restapi/change/CreateMergePatchSet.java
index 1b85d0b..34b4383 100644
--- a/java/com/google/gerrit/server/restapi/change/CreateMergePatchSet.java
+++ b/java/com/google/gerrit/server/restapi/change/CreateMergePatchSet.java
@@ -141,7 +141,7 @@
     }
     in.baseChange = Strings.nullToEmpty(in.baseChange).trim();
 
-    PatchSet ps = psUtil.current(db.get(), rsrc.getNotes());
+    PatchSet ps = psUtil.current(rsrc.getNotes());
     Change change = rsrc.getChange();
     Project.NameKey project = change.getProject();
     Branch.NameKey dest = change.getDest();
@@ -216,7 +216,7 @@
     } catch (AuthException e) {
       throw new UnprocessableEntityException("Read not permitted for " + baseChange);
     }
-    return psUtil.current(db.get(), change);
+    return psUtil.current(change);
   }
 
   private RevCommit createMergeCommit(
diff --git a/java/com/google/gerrit/server/restapi/change/DeleteAssignee.java b/java/com/google/gerrit/server/restapi/change/DeleteAssignee.java
index 7d68022..1e9b695 100644
--- a/java/com/google/gerrit/server/restapi/change/DeleteAssignee.java
+++ b/java/com/google/gerrit/server/restapi/change/DeleteAssignee.java
@@ -114,14 +114,14 @@
       return deletedAssignee != null ? deletedAssignee.getAccount().getId() : null;
     }
 
-    private void addMessage(ChangeContext ctx, ChangeUpdate update, IdentifiedUser deletedAssignee)
-        throws OrmException {
+    private void addMessage(
+        ChangeContext ctx, ChangeUpdate update, IdentifiedUser deletedAssignee) {
       ChangeMessage cmsg =
           ChangeMessagesUtil.newMessage(
               ctx,
               "Assignee deleted: " + deletedAssignee.getNameEmail(),
               ChangeMessagesUtil.TAG_DELETE_ASSIGNEE);
-      cmUtil.addChangeMessage(ctx.getDb(), update, cmsg);
+      cmUtil.addChangeMessage(update, cmsg);
     }
 
     @Override
diff --git a/java/com/google/gerrit/server/restapi/change/DeleteChangeMessage.java b/java/com/google/gerrit/server/restapi/change/DeleteChangeMessage.java
index 881d106..c57f9ec 100644
--- a/java/com/google/gerrit/server/restapi/change/DeleteChangeMessage.java
+++ b/java/com/google/gerrit/server/restapi/change/DeleteChangeMessage.java
@@ -109,8 +109,7 @@
 
   private ChangeMessageInfo createUpdatedChangeMessageInfo(Change.Id id, int targetIdx)
       throws OrmException, PermissionBackendException {
-    List<ChangeMessage> messages =
-        changeMessagesUtil.byChange(dbProvider.get(), notesFactory.createChecked(id));
+    List<ChangeMessage> messages = changeMessagesUtil.byChange(notesFactory.createChecked(id));
     ChangeMessage updatedChangeMessage = messages.get(targetIdx);
     AccountLoader accountLoader = accountLoaderFactory.create(true);
     ChangeMessageInfo info = createChangeMessageInfo(updatedChangeMessage, accountLoader);
@@ -145,10 +144,9 @@
     }
 
     @Override
-    public boolean updateChange(ChangeContext ctx) throws OrmException {
+    public boolean updateChange(ChangeContext ctx) {
       PatchSet.Id psId = ctx.getChange().currentPatchSetId();
-      changeMessagesUtil.replaceChangeMessage(
-          ctx.getDb(), ctx.getUpdate(psId), targetMessageIdx, newMessage);
+      changeMessagesUtil.replaceChangeMessage(ctx.getUpdate(psId), targetMessageIdx, newMessage);
       return true;
     }
   }
diff --git a/java/com/google/gerrit/server/restapi/change/DeleteChangeOp.java b/java/com/google/gerrit/server/restapi/change/DeleteChangeOp.java
index ae2d2eb..be7b0f7 100644
--- a/java/com/google/gerrit/server/restapi/change/DeleteChangeOp.java
+++ b/java/com/google/gerrit/server/restapi/change/DeleteChangeOp.java
@@ -70,7 +70,7 @@
     checkState(id == null, "cannot reuse DeleteChangeOp");
 
     id = ctx.getChange().getId();
-    Collection<PatchSet> patchSets = psUtil.byChange(ctx.getDb(), ctx.getNotes());
+    Collection<PatchSet> patchSets = psUtil.byChange(ctx.getNotes());
 
     ensureDeletable(ctx, id, patchSets);
     // Cleaning up is only possible as long as the change and its elements are
diff --git a/java/com/google/gerrit/server/restapi/change/DeleteComment.java b/java/com/google/gerrit/server/restapi/change/DeleteComment.java
index 2ddf359..6279357 100644
--- a/java/com/google/gerrit/server/restapi/change/DeleteComment.java
+++ b/java/com/google/gerrit/server/restapi/change/DeleteComment.java
@@ -97,7 +97,7 @@
 
     ChangeNotes updatedNotes =
         notesFactory.createChecked(rsrc.getRevisionResource().getChange().getId());
-    List<Comment> changeComments = commentsUtil.publishedByChange(dbProvider.get(), updatedNotes);
+    List<Comment> changeComments = commentsUtil.publishedByChange(updatedNotes);
     Optional<Comment> updatedComment =
         changeComments.stream().filter(c -> c.key.equals(rsrc.getComment().key)).findFirst();
     if (!updatedComment.isPresent()) {
@@ -127,14 +127,10 @@
 
     @Override
     public boolean updateChange(ChangeContext ctx)
-        throws ResourceConflictException, OrmException, ResourceNotFoundException {
+        throws ResourceConflictException, ResourceNotFoundException {
       PatchSet.Id psId = ctx.getChange().currentPatchSetId();
       commentsUtil.deleteCommentByRewritingHistory(
-          ctx.getDb(),
-          ctx.getUpdate(psId),
-          rsrc.getComment().key,
-          rsrc.getPatchSet().getId(),
-          newMessage);
+          ctx.getUpdate(psId), rsrc.getComment().key, newMessage);
       return true;
     }
   }
diff --git a/java/com/google/gerrit/server/restapi/change/DeleteDraftComment.java b/java/com/google/gerrit/server/restapi/change/DeleteDraftComment.java
index f8e3add..0e62273 100644
--- a/java/com/google/gerrit/server/restapi/change/DeleteDraftComment.java
+++ b/java/com/google/gerrit/server/restapi/change/DeleteDraftComment.java
@@ -91,18 +91,18 @@
     public boolean updateChange(ChangeContext ctx)
         throws ResourceNotFoundException, OrmException, PatchListNotAvailableException {
       Optional<Comment> maybeComment =
-          commentsUtil.getDraft(ctx.getDb(), ctx.getNotes(), ctx.getIdentifiedUser(), key);
+          commentsUtil.getDraft(ctx.getNotes(), ctx.getIdentifiedUser(), key);
       if (!maybeComment.isPresent()) {
         return false; // Nothing to do.
       }
       PatchSet.Id psId = new PatchSet.Id(ctx.getChange().getId(), key.patchSetId);
-      PatchSet ps = psUtil.get(ctx.getDb(), ctx.getNotes(), psId);
+      PatchSet ps = psUtil.get(ctx.getNotes(), psId);
       if (ps == null) {
         throw new ResourceNotFoundException("patch set not found: " + psId);
       }
       Comment c = maybeComment.get();
       setCommentRevId(c, patchListCache, ctx.getChange(), ps);
-      commentsUtil.deleteComments(ctx.getDb(), ctx.getUpdate(psId), Collections.singleton(c));
+      commentsUtil.deleteComments(ctx.getUpdate(psId), Collections.singleton(c));
       ctx.dontBumpLastUpdatedOn();
       return true;
     }
diff --git a/java/com/google/gerrit/server/restapi/change/DeleteReviewerOp.java b/java/com/google/gerrit/server/restapi/change/DeleteReviewerOp.java
index 2cc4ce4..81ba1a0 100644
--- a/java/com/google/gerrit/server/restapi/change/DeleteReviewerOp.java
+++ b/java/com/google/gerrit/server/restapi/change/DeleteReviewerOp.java
@@ -125,11 +125,11 @@
     // Check of removing this reviewer (even if there is no vote processed by the loop below) is OK
     removeReviewerControl.checkRemoveReviewer(ctx.getNotes(), ctx.getUser(), reviewerId);
 
-    if (!approvalsUtil.getReviewers(ctx.getDb(), ctx.getNotes()).all().contains(reviewerId)) {
+    if (!approvalsUtil.getReviewers(ctx.getNotes()).all().contains(reviewerId)) {
       throw new ResourceNotFoundException();
     }
     currChange = ctx.getChange();
-    currPs = psUtil.current(ctx.getDb(), ctx.getNotes());
+    currPs = psUtil.current(ctx.getNotes());
 
     LabelTypes labelTypes = projectCache.checkedGet(ctx.getProject()).getLabelTypes(ctx.getNotes());
     // removing a reviewer will remove all her votes
@@ -171,7 +171,7 @@
 
     changeMessage =
         ChangeMessagesUtil.newMessage(ctx, msg.toString(), ChangeMessagesUtil.TAG_DELETE_REVIEWER);
-    cmUtil.addChangeMessage(ctx.getDb(), update, changeMessage);
+    cmUtil.addChangeMessage(update, changeMessage);
 
     return true;
   }
@@ -217,7 +217,7 @@
       db = ReviewDbUtil.unwrapDb(db);
       approvals = db.patchSetApprovals().byChange(changeId);
     } else {
-      approvals = approvalsUtil.byChange(ctx.getDb(), ctx.getNotes()).values();
+      approvals = approvalsUtil.byChange(ctx.getNotes()).values();
     }
 
     return Iterables.filter(approvals, psa -> accountId.equals(psa.getAccountId()));
diff --git a/java/com/google/gerrit/server/restapi/change/DeleteVote.java b/java/com/google/gerrit/server/restapi/change/DeleteVote.java
index 57649fad..1f770e6 100644
--- a/java/com/google/gerrit/server/restapi/change/DeleteVote.java
+++ b/java/com/google/gerrit/server/restapi/change/DeleteVote.java
@@ -169,7 +169,7 @@
             PermissionBackendException {
       change = ctx.getChange();
       PatchSet.Id psId = change.currentPatchSetId();
-      ps = psUtil.current(db.get(), ctx.getNotes());
+      ps = psUtil.current(ctx.getNotes());
 
       boolean found = false;
       LabelTypes labelTypes = projectState.getLabelTypes(ctx.getNotes());
@@ -218,7 +218,7 @@
       msg.append(" by ").append(userFactory.create(accountId).getNameEmail()).append("\n");
       changeMessage =
           ChangeMessagesUtil.newMessage(ctx, msg.toString(), ChangeMessagesUtil.TAG_DELETE_VOTE);
-      cmUtil.addChangeMessage(ctx.getDb(), ctx.getUpdate(psId), changeMessage);
+      cmUtil.addChangeMessage(ctx.getUpdate(psId), changeMessage);
 
       return true;
     }
diff --git a/java/com/google/gerrit/server/restapi/change/DraftComments.java b/java/com/google/gerrit/server/restapi/change/DraftComments.java
index b8e24a5..9f06252 100644
--- a/java/com/google/gerrit/server/restapi/change/DraftComments.java
+++ b/java/com/google/gerrit/server/restapi/change/DraftComments.java
@@ -21,7 +21,6 @@
 import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
 import com.google.gerrit.extensions.restapi.RestView;
 import com.google.gerrit.reviewdb.client.Comment;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.CommentsUtil;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.change.DraftCommentResource;
@@ -36,7 +35,6 @@
   private final DynamicMap<RestView<DraftCommentResource>> views;
   private final Provider<CurrentUser> user;
   private final ListRevisionDrafts list;
-  private final Provider<ReviewDb> dbProvider;
   private final CommentsUtil commentsUtil;
 
   @Inject
@@ -44,12 +42,10 @@
       DynamicMap<RestView<DraftCommentResource>> views,
       Provider<CurrentUser> user,
       ListRevisionDrafts list,
-      Provider<ReviewDb> dbProvider,
       CommentsUtil commentsUtil) {
     this.views = views;
     this.user = user;
     this.list = list;
-    this.dbProvider = dbProvider;
     this.commentsUtil = commentsUtil;
   }
 
@@ -71,7 +67,7 @@
     String uuid = id.get();
     for (Comment c :
         commentsUtil.draftByPatchSetAuthor(
-            dbProvider.get(), rev.getPatchSet().getId(), rev.getAccountId(), rev.getNotes())) {
+            rev.getPatchSet().getId(), rev.getAccountId(), rev.getNotes())) {
       if (uuid.equals(c.key.uuid)) {
         return new DraftCommentResource(rev, c);
       }
diff --git a/java/com/google/gerrit/server/restapi/change/Files.java b/java/com/google/gerrit/server/restapi/change/Files.java
index b374fdc..5f2c370 100644
--- a/java/com/google/gerrit/server/restapi/change/Files.java
+++ b/java/com/google/gerrit/server/restapi/change/Files.java
@@ -34,7 +34,6 @@
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.client.Project;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.PatchSetUtil;
 import com.google.gerrit.server.change.AccountPatchReviewStore;
@@ -114,7 +113,6 @@
     @Option(name = "-q")
     String query;
 
-    private final Provider<ReviewDb> db;
     private final Provider<CurrentUser> self;
     private final FileInfoJson fileInfoJson;
     private final Revisions revisions;
@@ -125,7 +123,6 @@
 
     @Inject
     ListFiles(
-        Provider<ReviewDb> db,
         Provider<CurrentUser> self,
         FileInfoJson fileInfoJson,
         Revisions revisions,
@@ -133,7 +130,6 @@
         PatchListCache patchListCache,
         PatchSetUtil psUtil,
         PluginItemContext<AccountPatchReviewStore> accountPatchReviewStore) {
-      this.db = db;
       this.self = self;
       this.fileInfoJson = fileInfoJson;
       this.revisions = revisions;
@@ -268,7 +264,7 @@
           RevWalk rw = new RevWalk(reader);
           TreeWalk tw = new TreeWalk(reader)) {
         Change change = resource.getChange();
-        PatchSet patchSet = psUtil.get(db.get(), resource.getNotes(), old);
+        PatchSet patchSet = psUtil.get(resource.getNotes(), old);
         if (patchSet == null) {
           throw new PatchListNotAvailableException(
               String.format(
diff --git a/java/com/google/gerrit/server/restapi/change/GetContent.java b/java/com/google/gerrit/server/restapi/change/GetContent.java
index 6b9bf17..c133581 100644
--- a/java/com/google/gerrit/server/restapi/change/GetContent.java
+++ b/java/com/google/gerrit/server/restapi/change/GetContent.java
@@ -21,7 +21,6 @@
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.Patch;
 import com.google.gerrit.reviewdb.client.PatchSet;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.PatchSetUtil;
 import com.google.gerrit.server.change.FileContentUtil;
 import com.google.gerrit.server.change.FileResource;
@@ -33,7 +32,6 @@
 import com.google.gerrit.server.project.ProjectCache;
 import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
-import com.google.inject.Provider;
 import java.io.IOException;
 import org.eclipse.jgit.errors.RepositoryNotFoundException;
 import org.eclipse.jgit.lib.ObjectId;
@@ -43,7 +41,6 @@
 import org.kohsuke.args4j.Option;
 
 public class GetContent implements RestReadView<FileResource> {
-  private final Provider<ReviewDb> db;
   private final GitRepositoryManager gitManager;
   private final PatchSetUtil psUtil;
   private final FileContentUtil fileContentUtil;
@@ -54,12 +51,10 @@
 
   @Inject
   GetContent(
-      Provider<ReviewDb> db,
       GitRepositoryManager gitManager,
       PatchSetUtil psUtil,
       FileContentUtil fileContentUtil,
       ProjectCache projectCache) {
-    this.db = db;
     this.gitManager = gitManager;
     this.psUtil = psUtil;
     this.fileContentUtil = fileContentUtil;
@@ -90,7 +85,7 @@
 
   private String getMessage(ChangeNotes notes) throws OrmException, IOException {
     Change.Id changeId = notes.getChangeId();
-    PatchSet ps = psUtil.current(db.get(), notes);
+    PatchSet ps = psUtil.current(notes);
     if (ps == null) {
       throw new NoSuchChangeException(changeId);
     }
@@ -106,7 +101,7 @@
 
   private byte[] getMergeList(ChangeNotes notes) throws OrmException, IOException {
     Change.Id changeId = notes.getChangeId();
-    PatchSet ps = psUtil.current(db.get(), notes);
+    PatchSet ps = psUtil.current(notes);
     if (ps == null) {
       throw new NoSuchChangeException(changeId);
     }
diff --git a/java/com/google/gerrit/server/restapi/change/GetRelated.java b/java/com/google/gerrit/server/restapi/change/GetRelated.java
index 30fbf39..9a65165 100644
--- a/java/com/google/gerrit/server/restapi/change/GetRelated.java
+++ b/java/com/google/gerrit/server/restapi/change/GetRelated.java
@@ -27,7 +27,6 @@
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.client.Project;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.CommonConverters;
 import com.google.gerrit.server.PatchSetUtil;
 import com.google.gerrit.server.change.RevisionResource;
@@ -50,7 +49,6 @@
 
 @Singleton
 public class GetRelated implements RestReadView<RevisionResource> {
-  private final Provider<ReviewDb> db;
   private final Provider<InternalChangeQuery> queryProvider;
   private final PatchSetUtil psUtil;
   private final RelatedChangesSorter sorter;
@@ -58,12 +56,10 @@
 
   @Inject
   GetRelated(
-      Provider<ReviewDb> db,
       Provider<InternalChangeQuery> queryProvider,
       PatchSetUtil psUtil,
       RelatedChangesSorter sorter,
       IndexConfig indexConfig) {
-    this.db = db;
     this.queryProvider = queryProvider;
     this.psUtil = psUtil;
     this.sorter = sorter;
@@ -81,7 +77,7 @@
 
   private List<RelatedChangeAndCommitInfo> getRelated(RevisionResource rsrc)
       throws OrmException, IOException, PermissionBackendException {
-    Set<String> groups = getAllGroups(rsrc.getNotes(), db.get(), psUtil);
+    Set<String> groups = getAllGroups(rsrc.getNotes(), psUtil);
     if (groups.isEmpty()) {
       return Collections.emptyList();
     }
@@ -125,13 +121,9 @@
   }
 
   @VisibleForTesting
-  public static Set<String> getAllGroups(ChangeNotes notes, ReviewDb db, PatchSetUtil psUtil)
+  public static Set<String> getAllGroups(ChangeNotes notes, PatchSetUtil psUtil)
       throws OrmException {
-    return psUtil
-        .byChange(db, notes)
-        .stream()
-        .flatMap(ps -> ps.getGroups().stream())
-        .collect(toSet());
+    return psUtil.byChange(notes).stream().flatMap(ps -> ps.getGroups().stream()).collect(toSet());
   }
 
   private void reloadChangeIfStale(List<ChangeData> cds, PatchSet wantedPs) throws OrmException {
diff --git a/java/com/google/gerrit/server/restapi/change/ListChangeComments.java b/java/com/google/gerrit/server/restapi/change/ListChangeComments.java
index 40f4642..42af722 100644
--- a/java/com/google/gerrit/server/restapi/change/ListChangeComments.java
+++ b/java/com/google/gerrit/server/restapi/change/ListChangeComments.java
@@ -57,6 +57,6 @@
         .setFillAccounts(true)
         .setFillPatchSet(true)
         .newCommentFormatter()
-        .format(commentsUtil.publishedByChange(db.get(), cd.notes()));
+        .format(commentsUtil.publishedByChange(cd.notes()));
   }
 }
diff --git a/java/com/google/gerrit/server/restapi/change/ListChangeDrafts.java b/java/com/google/gerrit/server/restapi/change/ListChangeDrafts.java
index a524f6d..280277c 100644
--- a/java/com/google/gerrit/server/restapi/change/ListChangeDrafts.java
+++ b/java/com/google/gerrit/server/restapi/change/ListChangeDrafts.java
@@ -57,7 +57,7 @@
     }
     ChangeData cd = changeDataFactory.create(db.get(), rsrc.getNotes());
     List<Comment> drafts =
-        commentsUtil.draftByChangeAuthor(db.get(), cd.notes(), rsrc.getUser().getAccountId());
+        commentsUtil.draftByChangeAuthor(cd.notes(), rsrc.getUser().getAccountId());
     return commentJson
         .get()
         .setFillAccounts(false)
diff --git a/java/com/google/gerrit/server/restapi/change/ListChangeMessages.java b/java/com/google/gerrit/server/restapi/change/ListChangeMessages.java
index 39c12f7..ba09281 100644
--- a/java/com/google/gerrit/server/restapi/change/ListChangeMessages.java
+++ b/java/com/google/gerrit/server/restapi/change/ListChangeMessages.java
@@ -19,30 +19,24 @@
 import com.google.gerrit.extensions.common.ChangeMessageInfo;
 import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.reviewdb.client.ChangeMessage;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.ChangeMessagesUtil;
 import com.google.gerrit.server.account.AccountLoader;
 import com.google.gerrit.server.change.ChangeResource;
 import com.google.gerrit.server.permissions.PermissionBackendException;
 import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
-import com.google.inject.Provider;
 import com.google.inject.Singleton;
 import java.util.List;
 import java.util.stream.Collectors;
 
 @Singleton
 public class ListChangeMessages implements RestReadView<ChangeResource> {
-  private final Provider<ReviewDb> dbProvider;
   private final ChangeMessagesUtil changeMessagesUtil;
   private final AccountLoader accountLoader;
 
   @Inject
   public ListChangeMessages(
-      Provider<ReviewDb> dbProvider,
-      ChangeMessagesUtil changeMessagesUtil,
-      AccountLoader.Factory accountLoaderFactory) {
-    this.dbProvider = dbProvider;
+      ChangeMessagesUtil changeMessagesUtil, AccountLoader.Factory accountLoaderFactory) {
     this.changeMessagesUtil = changeMessagesUtil;
     this.accountLoader = accountLoaderFactory.create(true);
   }
@@ -50,8 +44,7 @@
   @Override
   public List<ChangeMessageInfo> apply(ChangeResource resource)
       throws OrmException, PermissionBackendException {
-    List<ChangeMessage> messages =
-        changeMessagesUtil.byChange(dbProvider.get(), resource.getNotes());
+    List<ChangeMessage> messages = changeMessagesUtil.byChange(resource.getNotes());
     List<ChangeMessageInfo> messageInfos =
         messages
             .stream()
diff --git a/java/com/google/gerrit/server/restapi/change/ListReviewers.java b/java/com/google/gerrit/server/restapi/change/ListReviewers.java
index 99d8746..725a89b 100644
--- a/java/com/google/gerrit/server/restapi/change/ListReviewers.java
+++ b/java/com/google/gerrit/server/restapi/change/ListReviewers.java
@@ -18,7 +18,6 @@
 import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.mail.Address;
 import com.google.gerrit.reviewdb.client.Account;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.ApprovalsUtil;
 import com.google.gerrit.server.change.ChangeResource;
 import com.google.gerrit.server.change.ReviewerJson;
@@ -26,7 +25,6 @@
 import com.google.gerrit.server.permissions.PermissionBackendException;
 import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
-import com.google.inject.Provider;
 import com.google.inject.Singleton;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -34,18 +32,13 @@
 
 @Singleton
 class ListReviewers implements RestReadView<ChangeResource> {
-  private final Provider<ReviewDb> dbProvider;
   private final ApprovalsUtil approvalsUtil;
   private final ReviewerJson json;
   private final ReviewerResource.Factory resourceFactory;
 
   @Inject
   ListReviewers(
-      Provider<ReviewDb> dbProvider,
-      ApprovalsUtil approvalsUtil,
-      ReviewerResource.Factory resourceFactory,
-      ReviewerJson json) {
-    this.dbProvider = dbProvider;
+      ApprovalsUtil approvalsUtil, ReviewerResource.Factory resourceFactory, ReviewerJson json) {
     this.approvalsUtil = approvalsUtil;
     this.resourceFactory = resourceFactory;
     this.json = json;
@@ -55,8 +48,7 @@
   public List<ReviewerInfo> apply(ChangeResource rsrc)
       throws OrmException, PermissionBackendException {
     Map<String, ReviewerResource> reviewers = new LinkedHashMap<>();
-    ReviewDb db = dbProvider.get();
-    for (Account.Id accountId : approvalsUtil.getReviewers(db, rsrc.getNotes()).all()) {
+    for (Account.Id accountId : approvalsUtil.getReviewers(rsrc.getNotes()).all()) {
       if (!reviewers.containsKey(accountId.toString())) {
         reviewers.put(accountId.toString(), resourceFactory.create(rsrc, accountId));
       }
diff --git a/java/com/google/gerrit/server/restapi/change/ListRevisionComments.java b/java/com/google/gerrit/server/restapi/change/ListRevisionComments.java
index 964e560..f10d92b 100644
--- a/java/com/google/gerrit/server/restapi/change/ListRevisionComments.java
+++ b/java/com/google/gerrit/server/restapi/change/ListRevisionComments.java
@@ -15,7 +15,6 @@
 package com.google.gerrit.server.restapi.change;
 
 import com.google.gerrit.reviewdb.client.Comment;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.CommentsUtil;
 import com.google.gerrit.server.change.RevisionResource;
 import com.google.gerrit.server.notedb.ChangeNotes;
@@ -27,9 +26,8 @@
 @Singleton
 public class ListRevisionComments extends ListRevisionDrafts {
   @Inject
-  ListRevisionComments(
-      Provider<ReviewDb> db, Provider<CommentJson> commentJson, CommentsUtil commentsUtil) {
-    super(db, commentJson, commentsUtil);
+  ListRevisionComments(Provider<CommentJson> commentJson, CommentsUtil commentsUtil) {
+    super(commentJson, commentsUtil);
   }
 
   @Override
@@ -40,6 +38,6 @@
   @Override
   protected Iterable<Comment> listComments(RevisionResource rsrc) throws OrmException {
     ChangeNotes notes = rsrc.getNotes();
-    return commentsUtil.publishedByPatchSet(db.get(), notes, rsrc.getPatchSet().getId());
+    return commentsUtil.publishedByPatchSet(notes, rsrc.getPatchSet().getId());
   }
 }
diff --git a/java/com/google/gerrit/server/restapi/change/ListRevisionDrafts.java b/java/com/google/gerrit/server/restapi/change/ListRevisionDrafts.java
index dbd0ccf..3df7e9c 100644
--- a/java/com/google/gerrit/server/restapi/change/ListRevisionDrafts.java
+++ b/java/com/google/gerrit/server/restapi/change/ListRevisionDrafts.java
@@ -18,7 +18,6 @@
 import com.google.gerrit.extensions.common.CommentInfo;
 import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.reviewdb.client.Comment;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.CommentsUtil;
 import com.google.gerrit.server.change.RevisionResource;
 import com.google.gerrit.server.permissions.PermissionBackendException;
@@ -31,21 +30,18 @@
 
 @Singleton
 public class ListRevisionDrafts implements RestReadView<RevisionResource> {
-  protected final Provider<ReviewDb> db;
   protected final Provider<CommentJson> commentJson;
   protected final CommentsUtil commentsUtil;
 
   @Inject
-  ListRevisionDrafts(
-      Provider<ReviewDb> db, Provider<CommentJson> commentJson, CommentsUtil commentsUtil) {
-    this.db = db;
+  ListRevisionDrafts(Provider<CommentJson> commentJson, CommentsUtil commentsUtil) {
     this.commentJson = commentJson;
     this.commentsUtil = commentsUtil;
   }
 
   protected Iterable<Comment> listComments(RevisionResource rsrc) throws OrmException {
     return commentsUtil.draftByPatchSetAuthor(
-        db.get(), rsrc.getPatchSet().getId(), rsrc.getAccountId(), rsrc.getNotes());
+        rsrc.getPatchSet().getId(), rsrc.getAccountId(), rsrc.getNotes());
   }
 
   protected boolean includeAuthorInfo() {
diff --git a/java/com/google/gerrit/server/restapi/change/ListRevisionReviewers.java b/java/com/google/gerrit/server/restapi/change/ListRevisionReviewers.java
index 7add548..6e7ffd9 100644
--- a/java/com/google/gerrit/server/restapi/change/ListRevisionReviewers.java
+++ b/java/com/google/gerrit/server/restapi/change/ListRevisionReviewers.java
@@ -19,7 +19,6 @@
 import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.mail.Address;
 import com.google.gerrit.reviewdb.client.Account;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.ApprovalsUtil;
 import com.google.gerrit.server.change.ReviewerJson;
 import com.google.gerrit.server.change.ReviewerResource;
@@ -27,7 +26,6 @@
 import com.google.gerrit.server.permissions.PermissionBackendException;
 import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
-import com.google.inject.Provider;
 import com.google.inject.Singleton;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -35,18 +33,13 @@
 
 @Singleton
 class ListRevisionReviewers implements RestReadView<RevisionResource> {
-  private final Provider<ReviewDb> dbProvider;
   private final ApprovalsUtil approvalsUtil;
   private final ReviewerJson json;
   private final ReviewerResource.Factory resourceFactory;
 
   @Inject
   ListRevisionReviewers(
-      Provider<ReviewDb> dbProvider,
-      ApprovalsUtil approvalsUtil,
-      ReviewerResource.Factory resourceFactory,
-      ReviewerJson json) {
-    this.dbProvider = dbProvider;
+      ApprovalsUtil approvalsUtil, ReviewerResource.Factory resourceFactory, ReviewerJson json) {
     this.approvalsUtil = approvalsUtil;
     this.resourceFactory = resourceFactory;
     this.json = json;
@@ -60,8 +53,7 @@
     }
 
     Map<String, ReviewerResource> reviewers = new LinkedHashMap<>();
-    ReviewDb db = dbProvider.get();
-    for (Account.Id accountId : approvalsUtil.getReviewers(db, rsrc.getNotes()).all()) {
+    for (Account.Id accountId : approvalsUtil.getReviewers(rsrc.getNotes()).all()) {
       if (!reviewers.containsKey(accountId.toString())) {
         reviewers.put(accountId.toString(), resourceFactory.create(rsrc, accountId));
       }
diff --git a/java/com/google/gerrit/server/restapi/change/Move.java b/java/com/google/gerrit/server/restapi/change/Move.java
index df1d9b9..d781370 100644
--- a/java/com/google/gerrit/server/restapi/change/Move.java
+++ b/java/com/google/gerrit/server/restapi/change/Move.java
@@ -202,8 +202,7 @@
           RevWalk revWalk = new RevWalk(repo)) {
         RevCommit currPatchsetRevCommit =
             revWalk.parseCommit(
-                ObjectId.fromString(
-                    psUtil.current(ctx.getDb(), ctx.getNotes()).getRevision().get()));
+                ObjectId.fromString(psUtil.current(ctx.getNotes()).getRevision().get()));
         if (currPatchsetRevCommit.getParentCount() > 1) {
           throw new ResourceConflictException("Merge commit cannot be moved");
         }
@@ -252,7 +251,7 @@
       }
       ChangeMessage cmsg =
           ChangeMessagesUtil.newMessage(ctx, msgBuf.toString(), ChangeMessagesUtil.TAG_MOVE);
-      cmUtil.addChangeMessage(ctx.getDb(), update, cmsg);
+      cmUtil.addChangeMessage(update, cmsg);
 
       return true;
     }
diff --git a/java/com/google/gerrit/server/restapi/change/PostReview.java b/java/com/google/gerrit/server/restapi/change/PostReview.java
index d06766d..c2868fd 100644
--- a/java/com/google/gerrit/server/restapi/change/PostReview.java
+++ b/java/com/google/gerrit/server/restapi/change/PostReview.java
@@ -322,7 +322,7 @@
       if (!ccOrReviewer) {
         // Check if user was already CCed or reviewing prior to this review.
         ReviewerSet currentReviewers =
-            approvalsUtil.getReviewers(db.get(), revision.getChangeResource().getNotes());
+            approvalsUtil.getReviewers(revision.getChangeResource().getNotes());
         ccOrReviewer = currentReviewers.all().contains(id);
       }
 
@@ -896,7 +896,7 @@
             PatchListNotAvailableException {
       user = ctx.getIdentifiedUser();
       notes = ctx.getNotes();
-      ps = psUtil.get(ctx.getDb(), ctx.getNotes(), psId);
+      ps = psUtil.get(ctx.getNotes(), psId);
       boolean dirty = false;
       dirty |= insertComments(ctx);
       dirty |= insertRobotComments(ctx);
@@ -990,7 +990,7 @@
           break;
       }
       ChangeUpdate u = ctx.getUpdate(psId);
-      commentsUtil.putComments(ctx.getDb(), u, Status.PUBLISHED, toPublish);
+      commentsUtil.putComments(u, Status.PUBLISHED, toPublish);
       comments.addAll(toPublish);
       return !toPublish.isEmpty();
     }
@@ -1079,7 +1079,7 @@
 
     private Set<CommentSetEntry> readExistingComments(ChangeContext ctx) throws OrmException {
       return commentsUtil
-          .publishedByChange(ctx.getDb(), ctx.getNotes())
+          .publishedByChange(ctx.getNotes())
           .stream()
           .map(CommentSetEntry::create)
           .collect(toSet());
@@ -1095,8 +1095,7 @@
 
     private Map<String, Comment> changeDrafts(ChangeContext ctx) throws OrmException {
       Map<String, Comment> drafts = new HashMap<>();
-      for (Comment c :
-          commentsUtil.draftByChangeAuthor(ctx.getDb(), ctx.getNotes(), user.getAccountId())) {
+      for (Comment c : commentsUtil.draftByChangeAuthor(ctx.getNotes(), user.getAccountId())) {
         c.tag = in.tag;
         drafts.put(c.key.uuid, c);
       }
@@ -1106,8 +1105,7 @@
     private Map<String, Comment> patchSetDrafts(ChangeContext ctx) throws OrmException {
       Map<String, Comment> drafts = new HashMap<>();
       for (Comment c :
-          commentsUtil.draftByPatchSetAuthor(
-              ctx.getDb(), psId, user.getAccountId(), ctx.getNotes())) {
+          commentsUtil.draftByPatchSetAuthor(psId, user.getAccountId(), ctx.getNotes())) {
         drafts.put(c.key.uuid, c);
       }
       return drafts;
@@ -1387,7 +1385,7 @@
       return current;
     }
 
-    private boolean insertMessage(ChangeContext ctx) throws OrmException {
+    private boolean insertMessage(ChangeContext ctx) {
       String msg = Strings.nullToEmpty(in.message).trim();
 
       StringBuilder buf = new StringBuilder();
@@ -1411,7 +1409,7 @@
       message =
           ChangeMessagesUtil.newMessage(
               psId, user, ctx.getWhen(), "Patch Set " + psId.get() + ":" + buf, in.tag);
-      cmUtil.addChangeMessage(ctx.getDb(), ctx.getUpdate(psId), message);
+      cmUtil.addChangeMessage(ctx.getUpdate(psId), message);
       return true;
     }
 
diff --git a/java/com/google/gerrit/server/restapi/change/PutDescription.java b/java/com/google/gerrit/server/restapi/change/PutDescription.java
index 3b5edb2..e04a314 100644
--- a/java/com/google/gerrit/server/restapi/change/PutDescription.java
+++ b/java/com/google/gerrit/server/restapi/change/PutDescription.java
@@ -93,7 +93,7 @@
 
     @Override
     public boolean updateChange(ChangeContext ctx) throws OrmException {
-      PatchSet ps = psUtil.get(ctx.getDb(), ctx.getNotes(), psId);
+      PatchSet ps = psUtil.get(ctx.getNotes(), psId);
       ChangeUpdate update = ctx.getUpdate(psId);
       newDescription = Strings.nullToEmpty(input.description);
       oldDescription = Strings.nullToEmpty(ps.getDescription());
@@ -117,7 +117,7 @@
       ChangeMessage cmsg =
           ChangeMessagesUtil.newMessage(
               psId, ctx.getUser(), ctx.getWhen(), summary, ChangeMessagesUtil.TAG_SET_DESCRIPTION);
-      cmUtil.addChangeMessage(ctx.getDb(), update, cmsg);
+      cmUtil.addChangeMessage(update, cmsg);
       return true;
     }
   }
diff --git a/java/com/google/gerrit/server/restapi/change/PutDraftComment.java b/java/com/google/gerrit/server/restapi/change/PutDraftComment.java
index 72358bd..76fb889 100644
--- a/java/com/google/gerrit/server/restapi/change/PutDraftComment.java
+++ b/java/com/google/gerrit/server/restapi/change/PutDraftComment.java
@@ -118,7 +118,7 @@
     public boolean updateChange(ChangeContext ctx)
         throws ResourceNotFoundException, OrmException, PatchListNotAvailableException {
       Optional<Comment> maybeComment =
-          commentsUtil.getDraft(ctx.getDb(), ctx.getNotes(), ctx.getIdentifiedUser(), key);
+          commentsUtil.getDraft(ctx.getNotes(), ctx.getIdentifiedUser(), key);
       if (!maybeComment.isPresent()) {
         // Disappeared out from under us. Can't easily fall back to insert,
         // because the input might be missing required fields. Just give up.
@@ -133,7 +133,7 @@
       PatchSet.Id psId = new PatchSet.Id(ctx.getChange().getId(), origComment.key.patchSetId);
       ChangeUpdate update = ctx.getUpdate(psId);
 
-      PatchSet ps = psUtil.get(ctx.getDb(), ctx.getNotes(), psId);
+      PatchSet ps = psUtil.get(ctx.getNotes(), psId);
       if (ps == null) {
         throw new ResourceNotFoundException("patch set not found: " + psId);
       }
@@ -141,15 +141,12 @@
         // Updating the path alters the primary key, which isn't possible.
         // Delete then recreate the comment instead of an update.
 
-        commentsUtil.deleteComments(ctx.getDb(), update, Collections.singleton(origComment));
+        commentsUtil.deleteComments(update, Collections.singleton(origComment));
         comment.key.filename = in.path;
       }
       setCommentRevId(comment, patchListCache, ctx.getChange(), ps);
       commentsUtil.putComments(
-          ctx.getDb(),
-          update,
-          Status.DRAFT,
-          Collections.singleton(update(comment, in, ctx.getWhen())));
+          update, Status.DRAFT, Collections.singleton(update(comment, in, ctx.getWhen())));
       ctx.dontBumpLastUpdatedOn();
       return true;
     }
diff --git a/java/com/google/gerrit/server/restapi/change/PutMessage.java b/java/com/google/gerrit/server/restapi/change/PutMessage.java
index bcd0e9e..756d3d5 100644
--- a/java/com/google/gerrit/server/restapi/change/PutMessage.java
+++ b/java/com/google/gerrit/server/restapi/change/PutMessage.java
@@ -105,7 +105,7 @@
       BatchUpdate.Factory updateFactory, ChangeResource resource, CommitMessageInput input)
       throws IOException, RestApiException, UpdateException, PermissionBackendException,
           OrmException, ConfigInvalidException {
-    PatchSet ps = psUtil.current(db.get(), resource.getNotes());
+    PatchSet ps = psUtil.current(resource.getNotes());
     if (ps == null) {
       throw new ResourceConflictException("current revision is missing");
     }
diff --git a/java/com/google/gerrit/server/restapi/change/PutTopic.java b/java/com/google/gerrit/server/restapi/change/PutTopic.java
index 7f56c91..60d5088 100644
--- a/java/com/google/gerrit/server/restapi/change/PutTopic.java
+++ b/java/com/google/gerrit/server/restapi/change/PutTopic.java
@@ -123,7 +123,7 @@
 
       ChangeMessage cmsg =
           ChangeMessagesUtil.newMessage(ctx, summary, ChangeMessagesUtil.TAG_SET_TOPIC);
-      cmUtil.addChangeMessage(ctx.getDb(), update, cmsg);
+      cmUtil.addChangeMessage(update, cmsg);
       return true;
     }
 
diff --git a/java/com/google/gerrit/server/restapi/change/Rebase.java b/java/com/google/gerrit/server/restapi/change/Rebase.java
index eed0896..7671fd4 100644
--- a/java/com/google/gerrit/server/restapi/change/Rebase.java
+++ b/java/com/google/gerrit/server/restapi/change/Rebase.java
@@ -273,7 +273,7 @@
         BatchUpdate.Factory updateFactory, ChangeResource rsrc, RebaseInput input)
         throws OrmException, UpdateException, RestApiException, IOException,
             PermissionBackendException {
-      PatchSet ps = psUtil.current(rebase.dbProvider.get(), rsrc.getNotes());
+      PatchSet ps = psUtil.current(rsrc.getNotes());
       if (ps == null) {
         throw new ResourceConflictException("current revision is missing");
       }
diff --git a/java/com/google/gerrit/server/restapi/change/Restore.java b/java/com/google/gerrit/server/restapi/change/Restore.java
index d6f9e2b..d40cf2d 100644
--- a/java/com/google/gerrit/server/restapi/change/Restore.java
+++ b/java/com/google/gerrit/server/restapi/change/Restore.java
@@ -124,13 +124,13 @@
       }
       PatchSet.Id psId = change.currentPatchSetId();
       ChangeUpdate update = ctx.getUpdate(psId);
-      patchSet = psUtil.get(ctx.getDb(), ctx.getNotes(), psId);
+      patchSet = psUtil.get(ctx.getNotes(), psId);
       change.setStatus(Status.NEW);
       change.setLastUpdatedOn(ctx.getWhen());
       update.setStatus(change.getStatus());
 
       message = newMessage(ctx);
-      cmUtil.addChangeMessage(ctx.getDb(), update, message);
+      cmUtil.addChangeMessage(update, message);
       return true;
     }
 
diff --git a/java/com/google/gerrit/server/restapi/change/Revert.java b/java/com/google/gerrit/server/restapi/change/Revert.java
index 7309fde..1d79227 100644
--- a/java/com/google/gerrit/server/restapi/change/Revert.java
+++ b/java/com/google/gerrit/server/restapi/change/Revert.java
@@ -168,7 +168,7 @@
     String message = Strings.emptyToNull(input.message);
     Change.Id changeIdToRevert = notes.getChangeId();
     PatchSet.Id patchSetId = notes.getChange().currentPatchSetId();
-    PatchSet patch = psUtil.get(db.get(), notes, patchSetId);
+    PatchSet patch = psUtil.get(notes, patchSetId);
     if (patch == null) {
       throw new ResourceNotFoundException(changeIdToRevert.toString());
     }
@@ -231,7 +231,7 @@
       ins.setNotify(input.notify);
       ins.setAccountsToNotify(accountsToNotify);
 
-      ReviewerSet reviewerSet = approvalsUtil.getReviewers(db.get(), notes);
+      ReviewerSet reviewerSet = approvalsUtil.getReviewers(notes);
 
       Set<Account.Id> reviewers = new HashSet<>();
       reviewers.add(changeToRevert.getOwner());
@@ -318,7 +318,7 @@
     }
 
     @Override
-    public boolean updateChange(ChangeContext ctx) throws Exception {
+    public boolean updateChange(ChangeContext ctx) {
       Change change = ctx.getChange();
       PatchSet.Id patchSetId = change.currentPatchSetId();
       ChangeMessage changeMessage =
@@ -326,7 +326,7 @@
               ctx,
               "Created a revert of this change as I" + computedChangeId.name(),
               ChangeMessagesUtil.TAG_REVERT);
-      cmUtil.addChangeMessage(ctx.getDb(), ctx.getUpdate(patchSetId), changeMessage);
+      cmUtil.addChangeMessage(ctx.getUpdate(patchSetId), changeMessage);
       return true;
     }
   }
diff --git a/java/com/google/gerrit/server/restapi/change/ReviewerRecommender.java b/java/com/google/gerrit/server/restapi/change/ReviewerRecommender.java
index d88489e..eb79b79 100644
--- a/java/com/google/gerrit/server/restapi/change/ReviewerRecommender.java
+++ b/java/com/google/gerrit/server/restapi/change/ReviewerRecommender.java
@@ -27,7 +27,6 @@
 import com.google.gerrit.index.query.QueryParseException;
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.reviewdb.client.PatchSetApproval;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.ApprovalsUtil;
 import com.google.gerrit.server.FanOutExecutor;
 import com.google.gerrit.server.change.ReviewerSuggestion;
@@ -80,7 +79,6 @@
   private final PluginMapContext<ReviewerSuggestion> reviewerSuggestionPluginMap;
   private final Provider<InternalChangeQuery> queryProvider;
   private final ExecutorService executor;
-  private final Provider<ReviewDb> dbProvider;
   private final ApprovalsUtil approvalsUtil;
 
   @Inject
@@ -89,7 +87,6 @@
       PluginMapContext<ReviewerSuggestion> reviewerSuggestionPluginMap,
       Provider<InternalChangeQuery> queryProvider,
       @FanOutExecutor ExecutorService executor,
-      Provider<ReviewDb> dbProvider,
       ApprovalsUtil approvalsUtil,
       @GerritServerConfig Config config) {
     this.changeQueryBuilder = changeQueryBuilder;
@@ -97,7 +94,6 @@
     this.queryProvider = queryProvider;
     this.reviewerSuggestionPluginMap = reviewerSuggestionPluginMap;
     this.executor = executor;
-    this.dbProvider = dbProvider;
     this.approvalsUtil = approvalsUtil;
   }
 
@@ -183,7 +179,7 @@
 
       // Remove existing reviewers
       approvalsUtil
-          .getReviewers(dbProvider.get(), changeNotes)
+          .getReviewers(changeNotes)
           .byState(REVIEWER)
           .forEach(
               r -> {
diff --git a/java/com/google/gerrit/server/restapi/change/Reviewers.java b/java/com/google/gerrit/server/restapi/change/Reviewers.java
index f0aef13..cf69080 100644
--- a/java/com/google/gerrit/server/restapi/change/Reviewers.java
+++ b/java/com/google/gerrit/server/restapi/change/Reviewers.java
@@ -23,14 +23,12 @@
 import com.google.gerrit.extensions.restapi.TopLevelResource;
 import com.google.gerrit.mail.Address;
 import com.google.gerrit.reviewdb.client.Account;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.ApprovalsUtil;
 import com.google.gerrit.server.change.ChangeResource;
 import com.google.gerrit.server.change.ReviewerResource;
 import com.google.gerrit.server.restapi.account.AccountsCollection;
 import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
-import com.google.inject.Provider;
 import com.google.inject.Singleton;
 import java.io.IOException;
 import java.util.Collection;
@@ -39,7 +37,6 @@
 @Singleton
 public class Reviewers implements ChildCollection<ChangeResource, ReviewerResource> {
   private final DynamicMap<RestView<ReviewerResource>> views;
-  private final Provider<ReviewDb> dbProvider;
   private final ApprovalsUtil approvalsUtil;
   private final AccountsCollection accounts;
   private final ReviewerResource.Factory resourceFactory;
@@ -47,13 +44,11 @@
 
   @Inject
   Reviewers(
-      Provider<ReviewDb> dbProvider,
       ApprovalsUtil approvalsUtil,
       AccountsCollection accounts,
       ReviewerResource.Factory resourceFactory,
       DynamicMap<RestView<ReviewerResource>> views,
       ListReviewers list) {
-    this.dbProvider = dbProvider;
     this.approvalsUtil = approvalsUtil;
     this.accounts = accounts;
     this.resourceFactory = resourceFactory;
@@ -99,6 +94,6 @@
   }
 
   private Collection<Account.Id> fetchAccountIds(ChangeResource rsrc) throws OrmException {
-    return approvalsUtil.getReviewers(dbProvider.get(), rsrc.getNotes()).all();
+    return approvalsUtil.getReviewers(rsrc.getNotes()).all();
   }
 }
diff --git a/java/com/google/gerrit/server/restapi/change/RevisionReviewers.java b/java/com/google/gerrit/server/restapi/change/RevisionReviewers.java
index b9b7a4f..60c9a54 100644
--- a/java/com/google/gerrit/server/restapi/change/RevisionReviewers.java
+++ b/java/com/google/gerrit/server/restapi/change/RevisionReviewers.java
@@ -24,14 +24,12 @@
 import com.google.gerrit.extensions.restapi.TopLevelResource;
 import com.google.gerrit.mail.Address;
 import com.google.gerrit.reviewdb.client.Account;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.ApprovalsUtil;
 import com.google.gerrit.server.change.ReviewerResource;
 import com.google.gerrit.server.change.RevisionResource;
 import com.google.gerrit.server.restapi.account.AccountsCollection;
 import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
-import com.google.inject.Provider;
 import com.google.inject.Singleton;
 import java.io.IOException;
 import java.util.Collection;
@@ -40,7 +38,6 @@
 @Singleton
 public class RevisionReviewers implements ChildCollection<RevisionResource, ReviewerResource> {
   private final DynamicMap<RestView<ReviewerResource>> views;
-  private final Provider<ReviewDb> dbProvider;
   private final ApprovalsUtil approvalsUtil;
   private final AccountsCollection accounts;
   private final ReviewerResource.Factory resourceFactory;
@@ -48,13 +45,11 @@
 
   @Inject
   RevisionReviewers(
-      Provider<ReviewDb> dbProvider,
       ApprovalsUtil approvalsUtil,
       AccountsCollection accounts,
       ReviewerResource.Factory resourceFactory,
       DynamicMap<RestView<ReviewerResource>> views,
       ListRevisionReviewers list) {
-    this.dbProvider = dbProvider;
     this.approvalsUtil = approvalsUtil;
     this.accounts = accounts;
     this.resourceFactory = resourceFactory;
@@ -89,8 +84,7 @@
         throw e;
       }
     }
-    Collection<Account.Id> reviewers =
-        approvalsUtil.getReviewers(dbProvider.get(), rsrc.getNotes()).all();
+    Collection<Account.Id> reviewers = approvalsUtil.getReviewers(rsrc.getNotes()).all();
     // See if the id exists as a reviewer for this change
     if (reviewers.contains(accountId)) {
       return resourceFactory.create(rsrc, accountId);
diff --git a/java/com/google/gerrit/server/restapi/change/Revisions.java b/java/com/google/gerrit/server/restapi/change/Revisions.java
index 557d77a..50bd66f 100644
--- a/java/com/google/gerrit/server/restapi/change/Revisions.java
+++ b/java/com/google/gerrit/server/restapi/change/Revisions.java
@@ -85,7 +85,7 @@
       throws ResourceNotFoundException, AuthException, OrmException, IOException,
           PermissionBackendException {
     if (id.get().equals("current")) {
-      PatchSet ps = psUtil.current(dbProvider.get(), change.getNotes());
+      PatchSet ps = psUtil.current(change.getNotes());
       if (ps != null && visible(change)) {
         return RevisionResource.createNonCachable(change, ps);
       }
@@ -135,7 +135,7 @@
       return Collections.emptyList();
     } else {
       List<RevisionResource> out = new ArrayList<>();
-      for (PatchSet ps : psUtil.byChange(dbProvider.get(), change.getNotes())) {
+      for (PatchSet ps : psUtil.byChange(change.getNotes())) {
         if (ps.getRevision() != null && ps.getRevision().get().startsWith(id)) {
           out.add(new RevisionResource(change, ps));
         }
@@ -151,10 +151,7 @@
   private List<RevisionResource> byLegacyPatchSetId(ChangeResource change, String id)
       throws OrmException {
     PatchSet ps =
-        psUtil.get(
-            dbProvider.get(),
-            change.getNotes(),
-            new PatchSet.Id(change.getId(), Integer.parseInt(id)));
+        psUtil.get(change.getNotes(), new PatchSet.Id(change.getId(), Integer.parseInt(id)));
     if (ps != null) {
       return Collections.singletonList(new RevisionResource(change, ps));
     }
diff --git a/java/com/google/gerrit/server/restapi/change/SetPrivateOp.java b/java/com/google/gerrit/server/restapi/change/SetPrivateOp.java
index 8aac92c..04c94be 100644
--- a/java/com/google/gerrit/server/restapi/change/SetPrivateOp.java
+++ b/java/com/google/gerrit/server/restapi/change/SetPrivateOp.java
@@ -73,7 +73,7 @@
   public boolean updateChange(ChangeContext ctx) throws ResourceConflictException, OrmException {
     change = ctx.getChange();
     ChangeNotes notes = ctx.getNotes();
-    ps = psUtil.get(ctx.getDb(), notes, change.currentPatchSetId());
+    ps = psUtil.get(notes, change.currentPatchSetId());
     ChangeUpdate update = ctx.getUpdate(change.currentPatchSetId());
     change.setPrivate(isPrivate);
     change.setLastUpdatedOn(ctx.getWhen());
@@ -87,7 +87,7 @@
     privateStateChanged.fire(change, ps, ctx.getAccount(), ctx.getWhen());
   }
 
-  private void addMessage(ChangeContext ctx, ChangeUpdate update) throws OrmException {
+  private void addMessage(ChangeContext ctx, ChangeUpdate update) {
     Change c = ctx.getChange();
     StringBuilder buf = new StringBuilder(c.isPrivate() ? "Set private" : "Unset private");
 
@@ -104,6 +104,6 @@
             c.isPrivate()
                 ? ChangeMessagesUtil.TAG_SET_PRIVATE
                 : ChangeMessagesUtil.TAG_UNSET_PRIVATE);
-    cmUtil.addChangeMessage(ctx.getDb(), update, cmsg);
+    cmUtil.addChangeMessage(update, cmsg);
   }
 }
diff --git a/java/com/google/gerrit/server/restapi/change/Submit.java b/java/com/google/gerrit/server/restapi/change/Submit.java
index 773d12d..d426df3 100644
--- a/java/com/google/gerrit/server/restapi/change/Submit.java
+++ b/java/com/google/gerrit/server/restapi/change/Submit.java
@@ -456,8 +456,7 @@
       for (ChangeData change : changes) {
         RevCommit commit =
             walk.parseCommit(
-                ObjectId.fromString(
-                    psUtil.current(dbProvider.get(), change.notes()).getRevision().get()));
+                ObjectId.fromString(psUtil.current(change.notes()).getRevision().get()));
         commits.put(change.getId(), commit);
       }
     }
@@ -495,18 +494,12 @@
   }
 
   public static class CurrentRevision implements RestModifyView<ChangeResource, SubmitInput> {
-    private final Provider<ReviewDb> dbProvider;
     private final Submit submit;
     private final ChangeJson.Factory json;
     private final PatchSetUtil psUtil;
 
     @Inject
-    CurrentRevision(
-        Provider<ReviewDb> dbProvider,
-        Submit submit,
-        ChangeJson.Factory json,
-        PatchSetUtil psUtil) {
-      this.dbProvider = dbProvider;
+    CurrentRevision(Submit submit, ChangeJson.Factory json, PatchSetUtil psUtil) {
       this.submit = submit;
       this.json = json;
       this.psUtil = psUtil;
@@ -516,7 +509,7 @@
     public ChangeInfo apply(ChangeResource rsrc, SubmitInput input)
         throws RestApiException, RepositoryNotFoundException, IOException, OrmException,
             PermissionBackendException, UpdateException, ConfigInvalidException {
-      PatchSet ps = psUtil.current(dbProvider.get(), rsrc.getNotes());
+      PatchSet ps = psUtil.current(rsrc.getNotes());
       if (ps == null) {
         throw new ResourceConflictException("current revision is missing");
       }
diff --git a/java/com/google/gerrit/server/schema/H2.java b/java/com/google/gerrit/server/schema/H2.java
deleted file mode 100644
index 641f5e3..0000000
--- a/java/com/google/gerrit/server/schema/H2.java
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright (C) 2012 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package com.google.gerrit.server.schema;
-
-import com.google.gerrit.server.config.GerritServerConfig;
-import com.google.gerrit.server.config.SitePaths;
-import com.google.inject.Inject;
-import java.nio.file.Path;
-import org.eclipse.jgit.lib.Config;
-
-class H2 {
-
-  protected final Config cfg;
-  private final SitePaths site;
-
-  @Inject
-  H2(SitePaths site, @GerritServerConfig Config cfg) {
-    this.cfg = cfg;
-    this.site = site;
-  }
-
-  public String getUrl() {
-    String database = cfg.getString("database", null, "database");
-    if (database == null || database.isEmpty()) {
-      database = "db/ReviewDB";
-    }
-    return appendUrlOptions(cfg, createUrl(site.resolve(database)));
-  }
-
-  public static String createUrl(Path path) {
-    return new StringBuilder().append("jdbc:h2:").append(path.toUri().toString()).toString();
-  }
-
-  public static String appendUrlOptions(Config cfg, String url) {
-    long h2CacheSize = cfg.getLong("database", "h2", "cacheSize", -1);
-    boolean h2AutoServer = cfg.getBoolean("database", "h2", "autoServer", false);
-
-    StringBuilder urlBuilder = new StringBuilder().append(url);
-
-    if (h2CacheSize >= 0) {
-      // H2 CACHE_SIZE is always given in KB
-      urlBuilder.append(";CACHE_SIZE=").append(h2CacheSize / 1024);
-    }
-    if (h2AutoServer) {
-      urlBuilder.append(";AUTO_SERVER=TRUE");
-    }
-    return urlBuilder.toString();
-  }
-}
diff --git a/java/com/google/gerrit/server/schema/JdbcAccountPatchReviewStore.java b/java/com/google/gerrit/server/schema/JdbcAccountPatchReviewStore.java
index 83a0986..1ef69db 100644
--- a/java/com/google/gerrit/server/schema/JdbcAccountPatchReviewStore.java
+++ b/java/com/google/gerrit/server/schema/JdbcAccountPatchReviewStore.java
@@ -32,6 +32,7 @@
 import com.google.gerrit.server.config.ThreadSettingsConfig;
 import com.google.gwtorm.server.OrmDuplicateKeyException;
 import com.google.gwtorm.server.OrmException;
+import java.nio.file.Path;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
@@ -115,7 +116,7 @@
   private static String getUrl(@GerritServerConfig Config cfg, SitePaths sitePaths) {
     String url = cfg.getString(ACCOUNT_PATCH_REVIEW_DB, null, URL);
     if (url == null) {
-      return H2.createUrl(sitePaths.db_dir.resolve("account_patch_reviews"));
+      return createH2Url(sitePaths.db_dir.resolve("account_patch_reviews"));
     }
     return url;
   }
@@ -352,4 +353,8 @@
     }
     return 0;
   }
+
+  private static String createH2Url(Path path) {
+    return new StringBuilder().append("jdbc:h2:").append(path.toUri().toString()).toString();
+  }
 }
diff --git a/java/com/google/gerrit/server/schema/ScriptRunner.java b/java/com/google/gerrit/server/schema/ScriptRunner.java
deleted file mode 100644
index f4cba98..0000000
--- a/java/com/google/gerrit/server/schema/ScriptRunner.java
+++ /dev/null
@@ -1,125 +0,0 @@
-// Copyright (C) 2009 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package com.google.gerrit.server.schema;
-
-import static java.nio.charset.StandardCharsets.UTF_8;
-
-import com.google.common.base.CharMatcher;
-import com.google.gerrit.reviewdb.server.ReviewDb;
-import com.google.gwtorm.jdbc.JdbcSchema;
-import com.google.gwtorm.schema.sql.SqlDialect;
-import com.google.gwtorm.server.OrmException;
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.sql.Connection;
-import java.sql.SQLException;
-import java.sql.Statement;
-import java.util.ArrayList;
-import java.util.List;
-
-/** Parses an SQL script from a resource file and later runs it. */
-class ScriptRunner {
-  private final String name;
-  private final List<String> commands;
-
-  static final ScriptRunner NOOP =
-      new ScriptRunner(null, null) {
-        @Override
-        void run(ReviewDb db) {}
-      };
-
-  ScriptRunner(String scriptName, InputStream script) {
-    this.name = scriptName;
-    try {
-      this.commands = script != null ? parse(script) : null;
-    } catch (IOException e) {
-      throw new IllegalStateException("Cannot parse " + name, e);
-    }
-  }
-
-  void run(ReviewDb db) throws OrmException {
-    try {
-      final JdbcSchema schema = (JdbcSchema) db;
-      final Connection c = schema.getConnection();
-      final SqlDialect dialect = schema.getDialect();
-      try (Statement stmt = c.createStatement()) {
-        for (String sql : commands) {
-          try {
-            if (!dialect.isStatementDelimiterSupported()) {
-              sql = CharMatcher.is(';').trimTrailingFrom(sql);
-            }
-            stmt.execute(sql);
-          } catch (SQLException e) {
-            throw new OrmException("Error in " + name + ":\n" + sql, e);
-          }
-        }
-      }
-    } catch (SQLException e) {
-      throw new OrmException("Cannot run statements for " + name, e);
-    }
-  }
-
-  private List<String> parse(InputStream in) throws IOException {
-    try (BufferedReader br = new BufferedReader(new InputStreamReader(in, UTF_8))) {
-      String delimiter = ";";
-      List<String> commands = new ArrayList<>();
-      StringBuilder buffer = new StringBuilder();
-      String line;
-      while ((line = br.readLine()) != null) {
-        if (line.isEmpty()) {
-          continue;
-        }
-        if (line.startsWith("--")) {
-          continue;
-        }
-
-        if (buffer.length() == 0 && line.toLowerCase().startsWith("delimiter ")) {
-          delimiter = line.substring("delimiter ".length()).trim();
-          continue;
-        }
-
-        if (buffer.length() > 0) {
-          buffer.append('\n');
-        }
-        buffer.append(line);
-
-        if (isDone(delimiter, line, buffer)) {
-          String cmd = buffer.toString();
-          commands.add(cmd);
-          buffer = new StringBuilder();
-        }
-      }
-      if (buffer.length() > 0) {
-        commands.add(buffer.toString());
-      }
-      return commands;
-    }
-  }
-
-  private boolean isDone(String delimiter, String line, StringBuilder buffer) {
-    if (";".equals(delimiter)) {
-      return buffer.charAt(buffer.length() - 1) == ';';
-
-    } else if (line.equals(delimiter)) {
-      buffer.setLength(buffer.length() - delimiter.length());
-      return true;
-
-    } else {
-      return false;
-    }
-  }
-}
diff --git a/java/com/google/gerrit/server/submit/CherryPick.java b/java/com/google/gerrit/server/submit/CherryPick.java
index 182c22a..844b3d4 100644
--- a/java/com/google/gerrit/server/submit/CherryPick.java
+++ b/java/com/google/gerrit/server/submit/CherryPick.java
@@ -157,10 +157,9 @@
               String.format(
                   "no new commit produced by CherryPick of %s, expected to fail fast",
                   toMerge.change().getId()));
-      PatchSet prevPs = args.psUtil.current(ctx.getDb(), ctx.getNotes());
+      PatchSet prevPs = args.psUtil.current(ctx.getNotes());
       PatchSet newPs =
           args.psUtil.insert(
-              ctx.getDb(),
               ctx.getRevWalk(),
               ctx.getUpdate(psId),
               psId,
diff --git a/java/com/google/gerrit/server/submit/MergeOp.java b/java/com/google/gerrit/server/submit/MergeOp.java
index 8e018a5..81e2661 100644
--- a/java/com/google/gerrit/server/submit/MergeOp.java
+++ b/java/com/google/gerrit/server/submit/MergeOp.java
@@ -911,7 +911,7 @@
               cd.getId(),
               new BatchUpdateOp() {
                 @Override
-                public boolean updateChange(ChangeContext ctx) throws OrmException {
+                public boolean updateChange(ChangeContext ctx) {
                   Change change = ctx.getChange();
                   if (!change.getStatus().isOpen()) {
                     return false;
@@ -926,8 +926,7 @@
                           change.getLastUpdatedOn(),
                           ChangeMessagesUtil.TAG_MERGED,
                           "Project was deleted.");
-                  cmUtil.addChangeMessage(
-                      ctx.getDb(), ctx.getUpdate(change.currentPatchSetId()), msg);
+                  cmUtil.addChangeMessage(ctx.getUpdate(change.currentPatchSetId()), msg);
 
                   return true;
                 }
diff --git a/java/com/google/gerrit/server/submit/RebaseSubmitStrategy.java b/java/com/google/gerrit/server/submit/RebaseSubmitStrategy.java
index cf3a44e..144b5b1 100644
--- a/java/com/google/gerrit/server/submit/RebaseSubmitStrategy.java
+++ b/java/com/google/gerrit/server/submit/RebaseSubmitStrategy.java
@@ -170,7 +170,7 @@
         ctx.addRefUpdate(ObjectId.zeroId(), newCommit, newPatchSetId.toRefName());
       } else {
         // Stale read of patch set is ok; see comments in RebaseChangeOp.
-        PatchSet origPs = args.psUtil.get(ctx.getDb(), toMerge.getNotes(), toMerge.getPatchsetId());
+        PatchSet origPs = args.psUtil.get(toMerge.getNotes(), toMerge.getPatchsetId());
         rebaseOp =
             args.rebaseFactory
                 .create(toMerge.notes(), origPs, args.mergeTip.getCurrentTip())
@@ -227,10 +227,9 @@
         newPs = rebaseOp.getPatchSet();
       } else {
         // CherryPick
-        PatchSet prevPs = args.psUtil.current(ctx.getDb(), ctx.getNotes());
+        PatchSet prevPs = args.psUtil.current(ctx.getNotes());
         newPs =
             args.psUtil.insert(
-                ctx.getDb(),
                 ctx.getRevWalk(),
                 ctx.getUpdate(newPatchSetId),
                 newPatchSetId,
diff --git a/java/com/google/gerrit/server/submit/SubmitStrategyOp.java b/java/com/google/gerrit/server/submit/SubmitStrategyOp.java
index 3be4c31..9cd30db 100644
--- a/java/com/google/gerrit/server/submit/SubmitStrategyOp.java
+++ b/java/com/google/gerrit/server/submit/SubmitStrategyOp.java
@@ -32,7 +32,6 @@
 import com.google.gerrit.reviewdb.client.PatchSetApproval;
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.reviewdb.client.RefNames;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.reviewdb.server.ReviewDbUtil;
 import com.google.gerrit.server.ApprovalsUtil;
 import com.google.gerrit.server.ChangeMessagesUtil;
@@ -251,7 +250,7 @@
         // during the submit strategy.
         mergedPatchSet =
             requireNonNull(
-                args.psUtil.get(ctx.getDb(), ctx.getNotes(), oldPsId),
+                args.psUtil.get(ctx.getNotes(), oldPsId),
                 () -> String.format("missing old patch set %s", oldPsId));
       } else {
         PatchSet.Id n = newPatchSet.getId();
@@ -301,12 +300,12 @@
       throws IOException, OrmException {
     PatchSet.Id psId = alreadyMergedCommit.getPatchsetId();
     logger.atFine().log("Fixing up already-merged patch set %s", psId);
-    PatchSet prevPs = args.psUtil.current(ctx.getDb(), ctx.getNotes());
+    PatchSet prevPs = args.psUtil.current(ctx.getNotes());
     ctx.getRevWalk().parseBody(alreadyMergedCommit);
     ctx.getChange()
         .setCurrentPatchSet(
             psId, alreadyMergedCommit.getShortMessage(), ctx.getChange().getOriginalSubject());
-    PatchSet existing = args.psUtil.get(ctx.getDb(), ctx.getNotes(), psId);
+    PatchSet existing = args.psUtil.get(ctx.getNotes(), psId);
     if (existing != null) {
       logger.atFine().log("Patch set row exists, only updating change");
       return existing;
@@ -317,14 +316,7 @@
     List<String> groups =
         prevPs != null ? prevPs.getGroups() : GroupCollector.getDefaultGroups(alreadyMergedCommit);
     return args.psUtil.insert(
-        ctx.getDb(),
-        ctx.getRevWalk(),
-        ctx.getUpdate(psId),
-        psId,
-        alreadyMergedCommit,
-        groups,
-        null,
-        null);
+        ctx.getRevWalk(), ctx.getUpdate(psId), psId, alreadyMergedCommit, groups, null, null);
   }
 
   private void setApproval(ChangeContext ctx, IdentifiedUser user)
@@ -483,9 +475,8 @@
         psId, ctx.getUser(), ctx.getWhen(), body, ChangeMessagesUtil.TAG_MERGED);
   }
 
-  private void setMerged(ChangeContext ctx, ChangeMessage msg) throws OrmException {
+  private void setMerged(ChangeContext ctx, ChangeMessage msg) {
     Change c = ctx.getChange();
-    ReviewDb db = ctx.getDb();
     logger.atFine().log("Setting change %s merged", c.getId());
     c.setStatus(Change.Status.MERGED);
     c.setSubmissionId(args.submissionId.toStringForStorage());
@@ -494,7 +485,7 @@
     // which is not the user from the update context. addMergedMessage was able
     // to do this in the past.
     if (msg != null) {
-      args.cmUtil.addChangeMessage(db, ctx.getUpdate(msg.getPatchSetId()), msg);
+      args.cmUtil.addChangeMessage(ctx.getUpdate(msg.getPatchSetId()), msg);
     }
   }
 
diff --git a/java/com/google/gerrit/server/update/RetryHelper.java b/java/com/google/gerrit/server/update/RetryHelper.java
index c08994b..9bdf293 100644
--- a/java/com/google/gerrit/server/update/RetryHelper.java
+++ b/java/com/google/gerrit/server/update/RetryHelper.java
@@ -41,7 +41,6 @@
 import com.google.gerrit.metrics.Histogram1;
 import com.google.gerrit.metrics.MetricMaker;
 import com.google.gerrit.server.config.GerritServerConfig;
-import com.google.gerrit.server.notedb.NotesMigration;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 import java.time.Duration;
@@ -141,7 +140,6 @@
     return options().build();
   }
 
-  private final NotesMigration migration;
   private final Metrics metrics;
   private final BatchUpdate.Factory updateFactory;
   private final Map<ActionType, Duration> defaultTimeouts;
@@ -152,20 +150,17 @@
   RetryHelper(
       @GerritServerConfig Config cfg,
       Metrics metrics,
-      NotesMigration migration,
       NoteDbBatchUpdate.AssistedFactory noteDbBatchUpdateFactory) {
-    this(cfg, metrics, migration, noteDbBatchUpdateFactory, null);
+    this(cfg, metrics, noteDbBatchUpdateFactory, null);
   }
 
   @VisibleForTesting
   public RetryHelper(
       @GerritServerConfig Config cfg,
       Metrics metrics,
-      NotesMigration migration,
       NoteDbBatchUpdate.AssistedFactory noteDbBatchUpdateFactory,
       @Nullable Consumer<RetryerBuilder<?>> overwriteDefaultRetryerStrategySetup) {
     this.metrics = metrics;
-    this.migration = migration;
     this.updateFactory = new BatchUpdate.Factory(noteDbBatchUpdateFactory);
 
     Duration defaultTimeout =
@@ -226,16 +221,6 @@
   public <T> T execute(ChangeAction<T> changeAction, Options opts)
       throws RestApiException, UpdateException {
     try {
-      if (!migration.disableChangeReviewDb()) {
-        // Either we aren't full-NoteDb, or the underlying ref storage doesn't support atomic
-        // transactions. Either way, retrying a partially-failed operation is not idempotent, so
-        // don't do it automatically. Let the end user decide whether they want to retry.
-        return executeWithTimeoutCount(
-            ActionType.CHANGE_UPDATE,
-            () -> changeAction.call(updateFactory),
-            RetryerBuilder.<T>newBuilder().build());
-      }
-
       return execute(
           ActionType.CHANGE_UPDATE,
           () -> changeAction.call(updateFactory),
diff --git a/java/com/google/gerrit/server/util/MagicBranch.java b/java/com/google/gerrit/server/util/MagicBranch.java
index a049169..4e41be0 100644
--- a/java/com/google/gerrit/server/util/MagicBranch.java
+++ b/java/com/google/gerrit/server/util/MagicBranch.java
@@ -28,25 +28,19 @@
   public static final String NEW_CHANGE = "refs/for/";
   // TODO(xchangcheng): remove after 'repo' supports private/wip changes.
   public static final String NEW_DRAFT_CHANGE = "refs/drafts/";
-  // TODO(xchangcheng): remove after migrating tools which are using this magic branch.
-  public static final String NEW_PUBLISH_CHANGE = "refs/publish/";
 
   /** Extracts the destination from a ref name */
   public static String getDestBranchName(String refName) {
     String magicBranch = NEW_CHANGE;
     if (refName.startsWith(NEW_DRAFT_CHANGE)) {
       magicBranch = NEW_DRAFT_CHANGE;
-    } else if (refName.startsWith(NEW_PUBLISH_CHANGE)) {
-      magicBranch = NEW_PUBLISH_CHANGE;
     }
     return refName.substring(magicBranch.length());
   }
 
   /** Checks if the supplied ref name is a magic branch */
   public static boolean isMagicBranch(String refName) {
-    return refName.startsWith(NEW_DRAFT_CHANGE)
-        || refName.startsWith(NEW_PUBLISH_CHANGE)
-        || refName.startsWith(NEW_CHANGE);
+    return refName.startsWith(NEW_DRAFT_CHANGE) || refName.startsWith(NEW_CHANGE);
   }
 
   /** Returns the ref name prefix for a magic branch, {@code null} if the branch is not magic */
@@ -54,9 +48,6 @@
     if (refName.startsWith(NEW_DRAFT_CHANGE)) {
       return NEW_DRAFT_CHANGE;
     }
-    if (refName.startsWith(NEW_PUBLISH_CHANGE)) {
-      return NEW_PUBLISH_CHANGE;
-    }
     if (refName.startsWith(NEW_CHANGE)) {
       return NEW_CHANGE;
     }
@@ -80,11 +71,6 @@
     if (result != Capable.OK) {
       return result;
     }
-    result = checkMagicBranchRef(NEW_PUBLISH_CHANGE, repo, project);
-    if (result != Capable.OK) {
-      return result;
-    }
-
     return Capable.OK;
   }
 
diff --git a/java/com/google/gerrit/sshd/commands/PatchSetParser.java b/java/com/google/gerrit/sshd/commands/PatchSetParser.java
index 8dee69ee..a1e8f07 100644
--- a/java/com/google/gerrit/sshd/commands/PatchSetParser.java
+++ b/java/com/google/gerrit/sshd/commands/PatchSetParser.java
@@ -107,7 +107,7 @@
         throw error("\"" + token + "\" is not a valid patch set");
       }
       ChangeNotes notes = getNotes(projectState, patchSetId.getParentKey());
-      PatchSet patchSet = psUtil.get(db.get(), notes, patchSetId);
+      PatchSet patchSet = psUtil.get(notes, patchSetId);
       if (patchSet == null) {
         throw error("\"" + token + "\" no such patch set");
       }
diff --git a/java/com/google/gerrit/testing/InMemoryTestEnvironment.java b/java/com/google/gerrit/testing/InMemoryTestEnvironment.java
index c01a44a..f665015 100644
--- a/java/com/google/gerrit/testing/InMemoryTestEnvironment.java
+++ b/java/com/google/gerrit/testing/InMemoryTestEnvironment.java
@@ -52,8 +52,6 @@
   @Inject private SchemaFactory<ReviewDb> schemaFactory;
   @Inject private SchemaCreator schemaCreator;
   @Inject private ThreadLocalRequestContext requestContext;
-  // Only for use in setting up/tearing down injector.
-  @Inject private InMemoryDatabase inMemoryDatabase;
 
   private ReviewDb db;
   private LifecycleManager lifecycle;
diff --git a/java/com/google/gerrit/testing/TestChanges.java b/java/com/google/gerrit/testing/TestChanges.java
index 8e752fa..0c87b38 100644
--- a/java/com/google/gerrit/testing/TestChanges.java
+++ b/java/com/google/gerrit/testing/TestChanges.java
@@ -30,7 +30,6 @@
 import com.google.gerrit.server.notedb.AbstractChangeNotes;
 import com.google.gerrit.server.notedb.ChangeNotes;
 import com.google.gerrit.server.notedb.ChangeUpdate;
-import com.google.gerrit.server.notedb.NotesMigration;
 import com.google.gerrit.server.util.time.TimeUtil;
 import com.google.inject.Injector;
 import java.util.TimeZone;
@@ -98,8 +97,7 @@
 
     ChangeNotes notes = update.getNotes();
     boolean hasPatchSets = notes.getPatchSets() != null && !notes.getPatchSets().isEmpty();
-    NotesMigration migration = injector.getInstance(NotesMigration.class);
-    if (hasPatchSets || !migration.readChanges()) {
+    if (hasPatchSets) {
       return update;
     }
 
diff --git a/javatests/com/google/gerrit/acceptance/api/accounts/AccountIT.java b/javatests/com/google/gerrit/acceptance/api/accounts/AccountIT.java
index cce7bca..66556178 100644
--- a/javatests/com/google/gerrit/acceptance/api/accounts/AccountIT.java
+++ b/javatests/com/google/gerrit/acceptance/api/accounts/AccountIT.java
@@ -2251,7 +2251,7 @@
             externalIds,
             metaDataUpdateInternalFactory,
             new RetryHelper(
-                cfg, retryMetrics, null, null, r -> r.withBlockStrategy(noSleepBlockStrategy)),
+                cfg, retryMetrics, null, r -> r.withBlockStrategy(noSleepBlockStrategy)),
             extIdNotesFactory,
             ident,
             ident,
@@ -2304,7 +2304,6 @@
                 cfg,
                 retryMetrics,
                 null,
-                null,
                 r ->
                     r.withStopStrategy(StopStrategies.stopAfterAttempt(status.size()))
                         .withBlockStrategy(noSleepBlockStrategy)),
@@ -2362,7 +2361,7 @@
             externalIds,
             metaDataUpdateInternalFactory,
             new RetryHelper(
-                cfg, retryMetrics, null, null, r -> r.withBlockStrategy(noSleepBlockStrategy)),
+                cfg, retryMetrics, null, r -> r.withBlockStrategy(noSleepBlockStrategy)),
             extIdNotesFactory,
             ident,
             ident,
@@ -2428,7 +2427,7 @@
             externalIds,
             metaDataUpdateInternalFactory,
             new RetryHelper(
-                cfg, retryMetrics, null, null, r -> r.withBlockStrategy(noSleepBlockStrategy)),
+                cfg, retryMetrics, null, r -> r.withBlockStrategy(noSleepBlockStrategy)),
             extIdNotesFactory,
             ident,
             ident,
@@ -2893,7 +2892,7 @@
         TreeWalk.forPath(
             allUsersRepo.getRepository(),
             AccountProperties.ACCOUNT_CONFIG,
-            getHead(allUsersRepo.getRepository()).getTree())) {
+            getHead(allUsersRepo.getRepository(), "HEAD").getTree())) {
       assertThat(tw).isNotNull();
       ac.fromText(
           new String(
diff --git a/javatests/com/google/gerrit/acceptance/api/change/ChangeIT.java b/javatests/com/google/gerrit/acceptance/api/change/ChangeIT.java
index bb4b728..324f33b 100644
--- a/javatests/com/google/gerrit/acceptance/api/change/ChangeIT.java
+++ b/javatests/com/google/gerrit/acceptance/api/change/ChangeIT.java
@@ -16,7 +16,6 @@
 
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.common.truth.Truth8.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.acceptance.GitUtil.assertPushOk;
 import static com.google.gerrit.acceptance.GitUtil.pushHead;
 import static com.google.gerrit.acceptance.PushOneCommit.FILE_CONTENT;
@@ -40,7 +39,6 @@
 import static com.google.gerrit.extensions.client.ReviewerState.REMOVED;
 import static com.google.gerrit.extensions.client.ReviewerState.REVIEWER;
 import static com.google.gerrit.reviewdb.client.RefNames.changeMetaRef;
-import static com.google.gerrit.reviewdb.server.ReviewDbUtil.unwrapDb;
 import static com.google.gerrit.server.StarredChangesUtil.DEFAULT_LABEL;
 import static com.google.gerrit.server.group.SystemGroupBackend.ANONYMOUS_USERS;
 import static com.google.gerrit.server.group.SystemGroupBackend.CHANGE_OWNER;
@@ -133,9 +131,7 @@
 import com.google.gerrit.reviewdb.client.AccountGroup;
 import com.google.gerrit.reviewdb.client.Branch;
 import com.google.gerrit.reviewdb.client.Change;
-import com.google.gerrit.reviewdb.client.LabelId;
 import com.google.gerrit.reviewdb.client.PatchSet;
-import com.google.gerrit.reviewdb.client.PatchSetApproval;
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.reviewdb.client.RefNames;
 import com.google.gerrit.server.ChangeMessagesUtil;
@@ -146,7 +142,6 @@
 import com.google.gerrit.server.index.change.ChangeIndex;
 import com.google.gerrit.server.index.change.ChangeIndexCollection;
 import com.google.gerrit.server.index.change.IndexedChangeQuery;
-import com.google.gerrit.server.notedb.NoteDbChangeState.PrimaryStorage;
 import com.google.gerrit.server.project.testing.Util;
 import com.google.gerrit.server.query.change.ChangeData;
 import com.google.gerrit.server.restapi.change.PostReview;
@@ -162,7 +157,6 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
@@ -513,8 +507,6 @@
 
   @Test
   public void pendingReviewersInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     ConfigInput conf = new ConfigInput();
     conf.enableReviewerByEmail = InheritableBoolean.TRUE;
     gApi.projects().name(project.get()).config(conf);
@@ -854,16 +846,11 @@
 
     List<Integer> reviewers =
         result.get(ReviewerState.REVIEWER).stream().map(a -> a._accountId).collect(toList());
-    if (notesMigration.readChanges()) {
-      assertThat(result).containsKey(ReviewerState.CC);
-      List<Integer> ccs =
-          result.get(ReviewerState.CC).stream().map(a -> a._accountId).collect(toList());
-      assertThat(ccs).containsExactly(accountCreator.user2().id.get());
-      assertThat(reviewers).containsExactly(user.id.get(), admin.id.get());
-    } else {
-      assertThat(reviewers)
-          .containsExactly(user.id.get(), admin.id.get(), accountCreator.user2().id.get());
-    }
+    assertThat(result).containsKey(ReviewerState.CC);
+    List<Integer> ccs =
+        result.get(ReviewerState.CC).stream().map(a -> a._accountId).collect(toList());
+    assertThat(ccs).containsExactly(accountCreator.user2().id.get());
+    assertThat(reviewers).containsExactly(user.id.get(), admin.id.get());
   }
 
   @Test
@@ -929,17 +916,6 @@
     assertThat(cr.all).hasSize(1);
     assertThat(cr.all.get(0).value).isEqualTo(1);
 
-    if (notesMigration.changePrimaryStorage() == PrimaryStorage.REVIEW_DB) {
-      // Ensure record was actually copied under ReviewDb
-      List<PatchSetApproval> psas =
-          unwrapDb(db)
-              .patchSetApprovals()
-              .byPatchSet(new PatchSet.Id(new Change.Id(c2._number), 2))
-              .toList();
-      assertThat(psas).hasSize(1);
-      assertThat(psas.get(0).getValue()).isEqualTo((short) 1);
-    }
-
     // Rebasing the second change again should fail
     exception.expect(ResourceConflictException.class);
     exception.expectMessage("Change is already up to date");
@@ -967,7 +943,8 @@
     ri2 = ci2.revisions.get(ci2.currentRevision);
     assertThat(ri2.commit.parents.get(0).commit).isEqualTo(r1.getCommit().name());
 
-    List<RelatedChangeAndCommitInfo> related = getRelated(id2, ri2._number);
+    List<RelatedChangeAndCommitInfo> related =
+        gApi.changes().id(id2.get()).revision(ri2._number).related().changes;
     assertThat(related).hasSize(2);
     assertThat(related.get(0)._changeNumber).isEqualTo(id2.get());
     assertThat(related.get(0)._revisionNumber).isEqualTo(2);
@@ -1001,7 +978,7 @@
     ri2 = ci2.revisions.get(ci2.currentRevision);
     assertThat(ri2.commit.parents.get(0).commit).isEqualTo(r1.getCommit().name());
 
-    assertThat(getRelated(id2, ri2._number)).isEmpty();
+    assertThat(gApi.changes().id(id2.get()).revision(ri2._number).related().changes).isEmpty();
   }
 
   @Test
@@ -1027,7 +1004,7 @@
     RevisionInfo ri3 = ci3.revisions.get(ci3.currentRevision);
     assertThat(ri3.commit.parents.get(0).commit).isEqualTo(r1.getCommit().name());
 
-    assertThat(getRelated(id3, ri3._number)).isEmpty();
+    assertThat(gApi.changes().id(id3.get()).revision(ri3._number).related().changes).isEmpty();
   }
 
   @Test
@@ -1710,8 +1687,6 @@
 
   @Test
   public void addReviewerThatIsInactiveEmailFallback() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     ConfigInput conf = new ConfigInput();
     conf.enableReviewerByEmail = InheritableBoolean.TRUE;
     gApi.projects().name(project.get()).config(conf);
@@ -1927,26 +1902,6 @@
   }
 
   @Test
-  public void addReviewerWithNoteDbWhenDummyApprovalInReviewDbExists() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-    assume().that(notesMigration.changePrimaryStorage()).isEqualTo(PrimaryStorage.REVIEW_DB);
-
-    PushOneCommit.Result r = createChange();
-
-    // insert dummy approval in ReviewDb
-    PatchSetApproval psa =
-        new PatchSetApproval(
-            new PatchSetApproval.Key(r.getPatchSetId(), user.id, new LabelId("Code-Review")),
-            (short) 0,
-            TimeUtil.nowTs());
-    db.patchSetApprovals().insert(Collections.singleton(psa));
-
-    AddReviewerInput in = new AddReviewerInput();
-    in.reviewer = user.email;
-    gApi.changes().id(r.getChangeId()).addReviewer(in);
-  }
-
-  @Test
   public void addSelfAsReviewer() throws Exception {
     TestTimeUtil.resetWithClockStep(1, SECONDS);
     PushOneCommit.Result r = createChange();
@@ -2004,9 +1959,7 @@
     in.reviewers = ImmutableList.of();
     gApi.changes().id(r.getChangeId()).revision(r.getCommit().name()).review(in);
 
-    // If we're not reading from NoteDb, then the CCed user will be returned in the REVIEWER state.
-    assertThat(getReviewerState(r.getChangeId(), testAccount.id))
-        .hasValue(notesMigration.readChanges() ? CC : REVIEWER);
+    assertThat(getReviewerState(r.getChangeId(), testAccount.id)).hasValue(CC);
   }
 
   @Test
@@ -2035,8 +1988,7 @@
         .revision(r.getCommit().name())
         .review(new ReviewInput().message("hi"));
     c = gApi.changes().id(r.getChangeId()).get();
-    ReviewerState state = notesMigration.readChanges() ? CC : REVIEWER;
-    assertThat(c.reviewers.get(state).stream().map(ai -> ai._accountId).collect(toList()))
+    assertThat(c.reviewers.get(CC).stream().map(ai -> ai._accountId).collect(toList()))
         .containsExactly(user.id.get());
   }
 
@@ -2885,8 +2837,6 @@
 
   @Test
   public void noteDbCommitsOnPatchSetCreation() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     PushOneCommit.Result r = createChange();
     pushFactory
         .create(
@@ -3438,12 +3388,7 @@
     gApi.changes().id(changeId).current().review(input);
 
     Map<String, Short> votes = gApi.changes().id(changeId).current().reviewer(admin.email).votes();
-    if (!notesMigration.readChanges()) {
-      assertThat(votes.keySet()).containsExactly("Code-Review");
-      assertThat(votes.values()).containsExactly((short) 0);
-    } else {
-      assertThat(votes).isEmpty();
-    }
+    assertThat(votes).isEmpty();
   }
 
   @Test
diff --git a/javatests/com/google/gerrit/acceptance/api/revision/RevisionIT.java b/javatests/com/google/gerrit/acceptance/api/revision/RevisionIT.java
index bde042f..20e6d3f 100644
--- a/javatests/com/google/gerrit/acceptance/api/revision/RevisionIT.java
+++ b/javatests/com/google/gerrit/acceptance/api/revision/RevisionIT.java
@@ -795,16 +795,11 @@
     assertThat(result).containsKey(ReviewerState.REVIEWER);
     List<Integer> reviewers =
         result.get(ReviewerState.REVIEWER).stream().map(a -> a._accountId).collect(toList());
-    if (notesMigration.readChanges()) {
-      assertThat(result).containsKey(ReviewerState.CC);
-      List<Integer> ccs =
-          result.get(ReviewerState.CC).stream().map(a -> a._accountId).collect(toList());
-      assertThat(ccs).containsExactly(user.id.get());
-      assertThat(reviewers).containsExactly(admin.id.get(), accountCreator.admin2().id.get());
-    } else {
-      assertThat(reviewers)
-          .containsExactly(user.id.get(), admin.id.get(), accountCreator.admin2().id.get());
-    }
+    assertThat(result).containsKey(ReviewerState.CC);
+    List<Integer> ccs =
+        result.get(ReviewerState.CC).stream().map(a -> a._accountId).collect(toList());
+    assertThat(ccs).containsExactly(user.id.get());
+    assertThat(reviewers).containsExactly(admin.id.get(), accountCreator.admin2().id.get());
   }
 
   @Test
@@ -1491,7 +1486,7 @@
 
   private PushOneCommit.Result createCherryPickableMerge(
       String parent1FileName, String parent2FileName) throws Exception {
-    RevCommit initialCommit = getHead(repo());
+    RevCommit initialCommit = getHead(repo(), "HEAD");
 
     String branchAName = "branchA";
     createBranch(new Branch.NameKey(project, branchAName));
diff --git a/javatests/com/google/gerrit/acceptance/api/revision/RobotCommentsIT.java b/javatests/com/google/gerrit/acceptance/api/revision/RobotCommentsIT.java
index d713db6..c5251f7 100644
--- a/javatests/com/google/gerrit/acceptance/api/revision/RobotCommentsIT.java
+++ b/javatests/com/google/gerrit/acceptance/api/revision/RobotCommentsIT.java
@@ -15,7 +15,6 @@
 package com.google.gerrit.acceptance.api.revision;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.acceptance.PushOneCommit.SUBJECT;
 import static com.google.gerrit.extensions.common.testing.EditInfoSubject.assertThat;
 import static com.google.gerrit.extensions.common.testing.RobotCommentInfoSubject.assertThatList;
@@ -38,7 +37,6 @@
 import com.google.gerrit.extensions.common.RobotCommentInfo;
 import com.google.gerrit.extensions.restapi.BadRequestException;
 import com.google.gerrit.extensions.restapi.BinaryResult;
-import com.google.gerrit.extensions.restapi.MethodNotAllowedException;
 import com.google.gerrit.extensions.restapi.ResourceConflictException;
 import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
 import com.google.gerrit.extensions.restapi.RestApiException;
@@ -85,8 +83,6 @@
 
   @Test
   public void retrievingRobotCommentsBeforeAddingAnyDoesNotRaiseAnException() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     Map<String, List<RobotCommentInfo>> robotComments =
         gApi.changes().id(changeId).current().robotComments();
 
@@ -96,8 +92,6 @@
 
   @Test
   public void addedRobotCommentsCanBeRetrieved() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     RobotCommentInput in = createRobotCommentInput();
     addRobotComment(changeId, in);
 
@@ -110,8 +104,6 @@
 
   @Test
   public void addedRobotCommentsCanBeRetrievedByChange() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     RobotCommentInput in = createRobotCommentInput();
     addRobotComment(changeId, in);
 
@@ -133,8 +125,6 @@
 
   @Test
   public void robotCommentsCanBeRetrievedAsList() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     RobotCommentInput robotCommentInput = createRobotCommentInput();
     addRobotComment(changeId, robotCommentInput);
 
@@ -148,8 +138,6 @@
 
   @Test
   public void specificRobotCommentCanBeRetrieved() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     RobotCommentInput robotCommentInput = createRobotCommentInput();
     addRobotComment(changeId, robotCommentInput);
 
@@ -163,8 +151,6 @@
 
   @Test
   public void robotCommentWithoutOptionalFieldsCanBeAdded() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     RobotCommentInput in = createRobotCommentInputWithMandatoryFields();
     addRobotComment(changeId, in);
 
@@ -176,8 +162,6 @@
 
   @Test
   public void hugeRobotCommentIsRejected() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     int defaultSizeLimit = 1024 * 1024;
     int sizeOfRest = 451;
     fixReplacementInfo.replacement = getStringFor(defaultSizeLimit - sizeOfRest + 1);
@@ -189,8 +173,6 @@
 
   @Test
   public void reasonablyLargeRobotCommentIsAccepted() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     int defaultSizeLimit = 1024 * 1024;
     int sizeOfRest = 451;
     fixReplacementInfo.replacement = getStringFor(defaultSizeLimit - sizeOfRest);
@@ -204,8 +186,6 @@
   @Test
   @GerritConfig(name = "change.robotCommentSizeLimit", value = "10k")
   public void maximumAllowedSizeOfRobotCommentCanBeAdjusted() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     int sizeLimit = 10 * 1024;
     fixReplacementInfo.replacement = getStringFor(sizeLimit);
 
@@ -217,8 +197,6 @@
   @Test
   @GerritConfig(name = "change.robotCommentSizeLimit", value = "0")
   public void zeroForMaximumAllowedSizeOfRobotCommentRemovesRestriction() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     int defaultSizeLimit = 1024 * 1024;
     fixReplacementInfo.replacement = getStringFor(defaultSizeLimit);
 
@@ -232,8 +210,6 @@
   @GerritConfig(name = "change.robotCommentSizeLimit", value = "-1")
   public void negativeValueForMaximumAllowedSizeOfRobotCommentRemovesRestriction()
       throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     int defaultSizeLimit = 1024 * 1024;
     fixReplacementInfo.replacement = getStringFor(defaultSizeLimit);
 
@@ -245,8 +221,6 @@
 
   @Test
   public void addedFixSuggestionCanBeRetrieved() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     addRobotComment(changeId, withFixRobotCommentInput);
     List<RobotCommentInfo> robotCommentInfos = getRobotComments();
 
@@ -255,8 +229,6 @@
 
   @Test
   public void fixIdIsGeneratedForFixSuggestion() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     addRobotComment(changeId, withFixRobotCommentInput);
     List<RobotCommentInfo> robotCommentInfos = getRobotComments();
 
@@ -270,8 +242,6 @@
 
   @Test
   public void descriptionOfFixSuggestionIsAcceptedAsIs() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     addRobotComment(changeId, withFixRobotCommentInput);
     List<RobotCommentInfo> robotCommentInfos = getRobotComments();
 
@@ -284,8 +254,6 @@
 
   @Test
   public void descriptionOfFixSuggestionIsMandatory() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixSuggestionInfo.description = null;
 
     exception.expect(BadRequestException.class);
@@ -298,8 +266,6 @@
 
   @Test
   public void addedFixReplacementCanBeRetrieved() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     addRobotComment(changeId, withFixRobotCommentInput);
     List<RobotCommentInfo> robotCommentInfos = getRobotComments();
 
@@ -312,8 +278,6 @@
 
   @Test
   public void fixReplacementsAreMandatory() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixSuggestionInfo.replacements = Collections.emptyList();
 
     exception.expect(BadRequestException.class);
@@ -327,8 +291,6 @@
 
   @Test
   public void pathOfFixReplacementIsAcceptedAsIs() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     addRobotComment(changeId, withFixRobotCommentInput);
 
     List<RobotCommentInfo> robotCommentInfos = getRobotComments();
@@ -343,8 +305,6 @@
 
   @Test
   public void pathOfFixReplacementIsMandatory() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixReplacementInfo.path = null;
 
     exception.expect(BadRequestException.class);
@@ -357,8 +317,6 @@
 
   @Test
   public void rangeOfFixReplacementIsAcceptedAsIs() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     addRobotComment(changeId, withFixRobotCommentInput);
 
     List<RobotCommentInfo> robotCommentInfos = getRobotComments();
@@ -373,8 +331,6 @@
 
   @Test
   public void rangeOfFixReplacementIsMandatory() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixReplacementInfo.range = null;
 
     exception.expect(BadRequestException.class);
@@ -387,8 +343,6 @@
 
   @Test
   public void rangeOfFixReplacementNeedsToBeValid() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixReplacementInfo.range = createRange(13, 9, 5, 10);
     exception.expect(BadRequestException.class);
     exception.expectMessage("Range (13:9 - 5:10)");
@@ -398,8 +352,6 @@
   @Test
   public void rangesOfFixReplacementsOfSameFixSuggestionForSameFileMayNotOverlap()
       throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     FixReplacementInfo fixReplacementInfo1 = new FixReplacementInfo();
     fixReplacementInfo1.path = FILE_NAME;
     fixReplacementInfo1.range = createRange(2, 0, 3, 1);
@@ -422,8 +374,6 @@
   @Test
   public void rangesOfFixReplacementsOfSameFixSuggestionForDifferentFileMayOverlap()
       throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     FixReplacementInfo fixReplacementInfo1 = new FixReplacementInfo();
     fixReplacementInfo1.path = FILE_NAME;
     fixReplacementInfo1.range = createRange(2, 0, 3, 1);
@@ -447,8 +397,6 @@
   @Test
   public void rangesOfFixReplacementsOfDifferentFixSuggestionsForSameFileMayOverlap()
       throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     FixReplacementInfo fixReplacementInfo1 = new FixReplacementInfo();
     fixReplacementInfo1.path = FILE_NAME;
     fixReplacementInfo1.range = createRange(2, 0, 3, 1);
@@ -472,8 +420,6 @@
 
   @Test
   public void fixReplacementsDoNotNeedToBeOrderedAccordingToRange() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     FixReplacementInfo fixReplacementInfo1 = new FixReplacementInfo();
     fixReplacementInfo1.path = FILE_NAME;
     fixReplacementInfo1.range = createRange(2, 0, 3, 0);
@@ -501,8 +447,6 @@
 
   @Test
   public void replacementStringOfFixReplacementIsAcceptedAsIs() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     addRobotComment(changeId, withFixRobotCommentInput);
 
     List<RobotCommentInfo> robotCommentInfos = getRobotComments();
@@ -517,8 +461,6 @@
 
   @Test
   public void replacementStringOfFixReplacementIsMandatory() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixReplacementInfo.replacement = null;
 
     exception.expect(BadRequestException.class);
@@ -532,8 +474,6 @@
 
   @Test
   public void fixWithinALineCanBeApplied() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixReplacementInfo.path = FILE_NAME;
     fixReplacementInfo.replacement = "Modified content";
     fixReplacementInfo.range = createRange(3, 1, 3, 3);
@@ -557,8 +497,6 @@
 
   @Test
   public void fixSpanningMultipleLinesCanBeApplied() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixReplacementInfo.path = FILE_NAME;
     fixReplacementInfo.replacement = "Modified content\n5";
     fixReplacementInfo.range = createRange(3, 2, 5, 3);
@@ -581,8 +519,6 @@
 
   @Test
   public void fixWithTwoCloseReplacementsOnSameFileCanBeApplied() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     FixReplacementInfo fixReplacementInfo1 = new FixReplacementInfo();
     fixReplacementInfo1.path = FILE_NAME;
     fixReplacementInfo1.range = createRange(2, 0, 3, 0);
@@ -615,8 +551,6 @@
 
   @Test
   public void twoFixesOnSameFileCanBeApplied() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     FixReplacementInfo fixReplacementInfo1 = new FixReplacementInfo();
     fixReplacementInfo1.path = FILE_NAME;
     fixReplacementInfo1.range = createRange(2, 0, 3, 0);
@@ -650,8 +584,6 @@
 
   @Test
   public void twoConflictingFixesOnSameFileCannotBeApplied() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     FixReplacementInfo fixReplacementInfo1 = new FixReplacementInfo();
     fixReplacementInfo1.path = FILE_NAME;
     fixReplacementInfo1.range = createRange(2, 0, 3, 1);
@@ -679,8 +611,6 @@
 
   @Test
   public void twoFixesOfSameRobotCommentCanBeApplied() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     FixReplacementInfo fixReplacementInfo1 = new FixReplacementInfo();
     fixReplacementInfo1.path = FILE_NAME;
     fixReplacementInfo1.range = createRange(2, 0, 3, 0);
@@ -714,8 +644,6 @@
 
   @Test
   public void fixReferringToDifferentFileThanRobotCommentCanBeApplied() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixReplacementInfo.path = FILE_NAME2;
     fixReplacementInfo.range = createRange(2, 0, 3, 0);
     fixReplacementInfo.replacement = "Modified content\n";
@@ -736,8 +664,6 @@
 
   @Test
   public void fixInvolvingTwoFilesCanBeApplied() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     FixReplacementInfo fixReplacementInfo1 = new FixReplacementInfo();
     fixReplacementInfo1.path = FILE_NAME;
     fixReplacementInfo1.range = createRange(2, 0, 3, 0);
@@ -775,8 +701,6 @@
 
   @Test
   public void fixReferringToNonExistentFileCannotBeApplied() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixReplacementInfo.path = "a_non_existent_file.txt";
     fixReplacementInfo.range = createRange(1, 0, 2, 0);
     fixReplacementInfo.replacement = "Modified content\n";
@@ -792,8 +716,6 @@
 
   @Test
   public void fixOnPreviousPatchSetWithoutChangeEditCannotBeApplied() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixReplacementInfo.path = FILE_NAME;
     fixReplacementInfo.replacement = "Modified content";
     fixReplacementInfo.range = createRange(3, 1, 3, 3);
@@ -815,8 +737,6 @@
 
   @Test
   public void fixOnPreviousPatchSetWithExistingChangeEditCanBeApplied() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     // Create an empty change edit.
     gApi.changes().id(changeId).edit().create();
 
@@ -849,8 +769,6 @@
   @Test
   public void fixOnCurrentPatchSetWithChangeEditOnPreviousPatchSetCannotBeApplied()
       throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     // Create an empty change edit.
     gApi.changes().id(changeId).edit().create();
 
@@ -874,8 +792,6 @@
 
   @Test
   public void fixDoesNotModifyCommitMessageOfChangeEdit() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     String changeEditCommitMessage = "This is the commit message of the change edit.\n";
     gApi.changes().id(changeId).edit().modifyCommitMessage(changeEditCommitMessage);
 
@@ -897,8 +813,6 @@
 
   @Test
   public void applyingFixTwiceIsIdempotent() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixReplacementInfo.path = FILE_NAME;
     fixReplacementInfo.replacement = "Modified content";
     fixReplacementInfo.range = createRange(3, 1, 3, 3);
@@ -922,8 +836,6 @@
 
   @Test
   public void nonExistentFixCannotBeApplied() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixReplacementInfo.path = FILE_NAME;
     fixReplacementInfo.replacement = "Modified content";
     fixReplacementInfo.range = createRange(3, 1, 3, 3);
@@ -941,8 +853,6 @@
 
   @Test
   public void applyingFixReturnsEditInfoForCreatedChangeEdit() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     fixReplacementInfo.path = FILE_NAME;
     fixReplacementInfo.replacement = "Modified content";
     fixReplacementInfo.range = createRange(3, 1, 3, 3);
@@ -964,8 +874,6 @@
 
   @Test
   public void applyingFixOnTopOfChangeEditReturnsEditInfoForUpdatedChangeEdit() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     gApi.changes().id(changeId).edit().create();
 
     fixReplacementInfo.path = FILE_NAME;
@@ -989,7 +897,6 @@
 
   @Test
   public void createdChangeEditIsBasedOnCurrentPatchSet() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     String currentRevision = gApi.changes().id(changeId).get().currentRevision;
 
     fixReplacementInfo.path = FILE_NAME;
@@ -1008,25 +915,7 @@
   }
 
   @Test
-  public void robotCommentsNotSupportedWithoutNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-
-    RobotCommentInput in = createRobotCommentInput();
-    ReviewInput reviewInput = new ReviewInput();
-    Map<String, List<RobotCommentInput>> robotComments = new HashMap<>();
-    robotComments.put(in.path, ImmutableList.of(in));
-    reviewInput.robotComments = robotComments;
-    reviewInput.message = "comment test";
-
-    exception.expect(MethodNotAllowedException.class);
-    exception.expectMessage("robot comments not supported");
-    gApi.changes().id(changeId).current().review(reviewInput);
-  }
-
-  @Test
   public void queryChangesWithCommentCounts() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     PushOneCommit.Result r1 = createChange();
     PushOneCommit.Result r2 =
         pushFactory
diff --git a/javatests/com/google/gerrit/acceptance/git/AbstractPushForReview.java b/javatests/com/google/gerrit/acceptance/git/AbstractPushForReview.java
index 7529ee3..5878407 100644
--- a/javatests/com/google/gerrit/acceptance/git/AbstractPushForReview.java
+++ b/javatests/com/google/gerrit/acceptance/git/AbstractPushForReview.java
@@ -18,7 +18,6 @@
 import static com.google.common.collect.ImmutableList.toImmutableList;
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.common.truth.Truth8.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.acceptance.GitUtil.assertPushOk;
 import static com.google.gerrit.acceptance.GitUtil.assertPushRejected;
 import static com.google.gerrit.acceptance.GitUtil.pushHead;
@@ -543,12 +542,7 @@
     r.assertOkStatus();
     assertThat(sender.getMessages()).hasSize(1);
     Message m = sender.getMessages().get(0);
-    if (notesMigration.readChanges()) {
-      assertThat(m.rcpt()).containsExactly(user.emailAddress);
-    } else {
-      // CCs are considered reviewers in the storage layer and so get notified.
-      assertThat(m.rcpt()).containsExactly(user.emailAddress, user2.emailAddress);
-    }
+    assertThat(m.rcpt()).containsExactly(user.emailAddress);
 
     sender.clear();
     r = pushTo(pushSpec + ",notify=" + NotifyHandling.ALL);
@@ -639,23 +633,19 @@
 
     PushOneCommit.Result r =
         pushTo("refs/for/master%cc=non.existing.1@example.com,cc=non.existing.2@example.com");
-    if (notesMigration.readChanges()) {
-      r.assertOkStatus();
+    r.assertOkStatus();
 
-      ChangeInfo ci = get(r.getChangeId(), DETAILED_LABELS);
-      ImmutableList<AccountInfo> ccs =
-          firstNonNull(ci.reviewers.get(ReviewerState.CC), ImmutableList.<AccountInfo>of())
-              .stream()
-              .sorted(comparing((AccountInfo a) -> a.email))
-              .collect(toImmutableList());
-      assertThat(ccs).hasSize(2);
-      assertThat(ccs.get(0).email).isEqualTo("non.existing.1@example.com");
-      assertThat(ccs.get(0)._accountId).isNull();
-      assertThat(ccs.get(1).email).isEqualTo("non.existing.2@example.com");
-      assertThat(ccs.get(1)._accountId).isNull();
-    } else {
-      r.assertErrorStatus("non.existing.1@example.com does not identify a registered user");
-    }
+    ChangeInfo ci = get(r.getChangeId(), DETAILED_LABELS);
+    ImmutableList<AccountInfo> ccs =
+        firstNonNull(ci.reviewers.get(ReviewerState.CC), ImmutableList.<AccountInfo>of())
+            .stream()
+            .sorted(comparing((AccountInfo a) -> a.email))
+            .collect(toImmutableList());
+    assertThat(ccs).hasSize(2);
+    assertThat(ccs.get(0).email).isEqualTo("non.existing.1@example.com");
+    assertThat(ccs.get(0)._accountId).isNull();
+    assertThat(ccs.get(1).email).isEqualTo("non.existing.2@example.com");
+    assertThat(ccs.get(1)._accountId).isNull();
   }
 
   @Test
@@ -721,23 +711,19 @@
 
     PushOneCommit.Result r =
         pushTo("refs/for/master%r=non.existing.1@example.com,r=non.existing.2@example.com");
-    if (notesMigration.readChanges()) {
-      r.assertOkStatus();
+    r.assertOkStatus();
 
-      ChangeInfo ci = get(r.getChangeId(), DETAILED_LABELS);
-      ImmutableList<AccountInfo> reviewers =
-          firstNonNull(ci.reviewers.get(ReviewerState.REVIEWER), ImmutableList.<AccountInfo>of())
-              .stream()
-              .sorted(comparing((AccountInfo a) -> a.email))
-              .collect(toImmutableList());
-      assertThat(reviewers).hasSize(2);
-      assertThat(reviewers.get(0).email).isEqualTo("non.existing.1@example.com");
-      assertThat(reviewers.get(0)._accountId).isNull();
-      assertThat(reviewers.get(1).email).isEqualTo("non.existing.2@example.com");
-      assertThat(reviewers.get(1)._accountId).isNull();
-    } else {
-      r.assertErrorStatus("non.existing.1@example.com does not identify a registered user");
-    }
+    ChangeInfo ci = get(r.getChangeId(), DETAILED_LABELS);
+    ImmutableList<AccountInfo> reviewers =
+        firstNonNull(ci.reviewers.get(ReviewerState.REVIEWER), ImmutableList.<AccountInfo>of())
+            .stream()
+            .sorted(comparing((AccountInfo a) -> a.email))
+            .collect(toImmutableList());
+    assertThat(reviewers).hasSize(2);
+    assertThat(reviewers.get(0).email).isEqualTo("non.existing.1@example.com");
+    assertThat(reviewers.get(0)._accountId).isNull();
+    assertThat(reviewers.get(1).email).isEqualTo("non.existing.2@example.com");
+    assertThat(reviewers.get(1)._accountId).isNull();
   }
 
   @Test
@@ -1295,9 +1281,6 @@
 
   @Test
   public void pushForMasterWithHashtags() throws Exception {
-    // Hashtags only work when reading from NoteDB is enabled
-    assume().that(notesMigration.readChanges()).isTrue();
-
     // specify a single hashtag as option
     String hashtag1 = "tag1";
     Set<String> expected = ImmutableSet.of(hashtag1);
@@ -1328,9 +1311,6 @@
 
   @Test
   public void pushForMasterWithMultipleHashtags() throws Exception {
-    // Hashtags only work when reading from NoteDB is enabled
-    assume().that(notesMigration.readChanges()).isTrue();
-
     // specify multiple hashtags as options
     String hashtag1 = "tag1";
     String hashtag2 = "tag2";
@@ -1363,14 +1343,6 @@
   }
 
   @Test
-  public void pushForMasterWithHashtagsNoteDbDisabled() throws Exception {
-    // Push with hashtags should fail when reading from NoteDb is disabled.
-    assume().that(notesMigration.readChanges()).isFalse();
-    PushOneCommit.Result r = pushTo("refs/for/master%hashtag=tag1");
-    r.assertErrorStatus("cannot add hashtags; noteDb is disabled");
-  }
-
-  @Test
   public void pushCommitUsingSignedOffBy() throws Exception {
     PushOneCommit push =
         pushFactory.create(
@@ -2298,16 +2270,6 @@
   }
 
   @Test
-  public void pushToPublishMagicBranchIsAllowed() throws Exception {
-    // Push to "refs/publish/*" will be a synonym of "refs/for/*".
-    createChange("refs/publish/master");
-    PushOneCommit.Result result = pushTo("refs/publish/master");
-    result.assertOkStatus();
-    assertThat(result.getMessage())
-        .endsWith("Pushing to refs/publish/* is deprecated, use refs/for/* instead.\n");
-  }
-
-  @Test
   public void pushNoteDbRef() throws Exception {
     String ref = "refs/changes/34/1234/meta";
     RevCommit c = testRepo.commit().message("Junk NoteDb commit").create();
@@ -2360,7 +2322,7 @@
         testRepo
             .commit()
             .message("Foo")
-            .parent(getHead(testRepo.getRepository()))
+            .parent(getHead(testRepo.getRepository(), "HEAD"))
             .insertChangeId()
             .create();
     testRepo.reset(c);
@@ -2388,7 +2350,7 @@
         testRepo
             .commit()
             .message("Foo")
-            .parent(getHead(testRepo.getRepository()))
+            .parent(getHead(testRepo.getRepository(), "HEAD"))
             .insertChangeId()
             .create();
     String id = GitUtil.getChangeId(testRepo, c).get();
@@ -2415,7 +2377,7 @@
         testRepo
             .commit()
             .message("Foo")
-            .parent(getHead(testRepo.getRepository()))
+            .parent(getHead(testRepo.getRepository(), "HEAD"))
             .insertChangeId()
             .create();
     testRepo.reset(c);
@@ -2436,7 +2398,7 @@
 
   @Test
   public void pushCommitsWithSameTreeNoFilesChangedWasRebased() throws Exception {
-    RevCommit head = getHead(testRepo.getRepository());
+    RevCommit head = getHead(testRepo.getRepository(), "HEAD");
     RevCommit c = testRepo.commit().message("Foo").parent(head).insertChangeId().create();
     testRepo.reset(c);
 
diff --git a/javatests/com/google/gerrit/acceptance/git/RefAdvertisementIT.java b/javatests/com/google/gerrit/acceptance/git/RefAdvertisementIT.java
index e4d9f7c..d2fd331 100644
--- a/javatests/com/google/gerrit/acceptance/git/RefAdvertisementIT.java
+++ b/javatests/com/google/gerrit/acceptance/git/RefAdvertisementIT.java
@@ -49,18 +49,15 @@
 import com.google.gerrit.server.config.AnonymousCowardName;
 import com.google.gerrit.server.git.receive.ReceiveCommitsAdvertiseRefsHook;
 import com.google.gerrit.server.notedb.ChangeNoteUtil;
-import com.google.gerrit.server.notedb.NoteDbChangeState.PrimaryStorage;
 import com.google.gerrit.server.permissions.PermissionBackend;
 import com.google.gerrit.server.permissions.PermissionBackend.RefFilterOptions;
 import com.google.gerrit.server.project.testing.Util;
 import com.google.gerrit.server.query.change.ChangeData;
 import com.google.gerrit.testing.NoteDbMode;
-import com.google.gerrit.testing.TestChanges;
 import com.google.inject.Inject;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.function.Predicate;
@@ -424,12 +421,6 @@
       PatchSet.Id psId = new PatchSet.Id(c3.getId(), 2);
       c.setCurrentPatchSet(psId, subject, c.getOriginalSubject());
 
-      if (notesMigration.changePrimaryStorage() == PrimaryStorage.REVIEW_DB) {
-        PatchSet ps = TestChanges.newPatchSet(psId, rev, admin.getId());
-        db.patchSets().insert(Collections.singleton(ps));
-        db.changes().update(Collections.singleton(c));
-      }
-
       if (notesMigration.commitChangeWrites()) {
         PersonIdent committer = serverIdent.get();
         PersonIdent author =
diff --git a/javatests/com/google/gerrit/acceptance/git/SubmitOnPushIT.java b/javatests/com/google/gerrit/acceptance/git/SubmitOnPushIT.java
index 700b18b..cf22a0a 100644
--- a/javatests/com/google/gerrit/acceptance/git/SubmitOnPushIT.java
+++ b/javatests/com/google/gerrit/acceptance/git/SubmitOnPushIT.java
@@ -318,7 +318,7 @@
 
   private PatchSetApproval getSubmitter(PatchSet.Id patchSetId) throws Exception {
     ChangeNotes notes = notesFactory.createChecked(db, project, patchSetId.getParentKey()).load();
-    return approvalsUtil.getSubmitter(db, notes, patchSetId);
+    return approvalsUtil.getSubmitter(notes, patchSetId);
   }
 
   private void assertSubmitApproval(PatchSet.Id patchSetId) throws Exception {
diff --git a/javatests/com/google/gerrit/acceptance/git/SubmoduleSubscriptionsWholeTopicMergeIT.java b/javatests/com/google/gerrit/acceptance/git/SubmoduleSubscriptionsWholeTopicMergeIT.java
index 82b9cd0..f72df99 100644
--- a/javatests/com/google/gerrit/acceptance/git/SubmoduleSubscriptionsWholeTopicMergeIT.java
+++ b/javatests/com/google/gerrit/acceptance/git/SubmoduleSubscriptionsWholeTopicMergeIT.java
@@ -16,7 +16,6 @@
 
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.common.truth.Truth.assertWithMessage;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.acceptance.GitUtil.getChangeId;
 
 import com.google.common.collect.ImmutableList;
@@ -800,8 +799,6 @@
 
   @Test
   public void retrySubmitAfterTornTopicOnLockFailure() throws Exception {
-    assume().that(notesMigration.disableChangeReviewDb()).isTrue();
-
     Project.NameKey subKey1 = createProjectForPush(getSubmitType());
     TestRepository<?> sub1 = cloneProject(subKey1);
     Project.NameKey subKey2 = createProjectForPush(getSubmitType());
diff --git a/javatests/com/google/gerrit/acceptance/rest/account/ImpersonationIT.java b/javatests/com/google/gerrit/acceptance/rest/account/ImpersonationIT.java
index 65c95f8..dd26347 100644
--- a/javatests/com/google/gerrit/acceptance/rest/account/ImpersonationIT.java
+++ b/javatests/com/google/gerrit/acceptance/rest/account/ImpersonationIT.java
@@ -15,7 +15,6 @@
 package com.google.gerrit.acceptance.rest.account;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.extensions.client.ListChangesOption.MESSAGES;
 import static com.google.gerrit.server.group.SystemGroupBackend.ANONYMOUS_USERS;
 import static com.google.gerrit.server.group.SystemGroupBackend.REGISTERED_USERS;
@@ -116,7 +115,7 @@
     assertThat(psa.getRealAccountId()).isEqualTo(admin.id);
 
     ChangeData cd = r.getChange();
-    ChangeMessage m = Iterables.getLast(cmUtil.byChange(db, cd.notes()));
+    ChangeMessage m = Iterables.getLast(cmUtil.byChange(cd.notes()));
     assertThat(m.getMessage()).endsWith(in.message);
     assertThat(m.getAuthor()).isEqualTo(user.id);
     assertThat(m.getRealAuthor()).isEqualTo(admin.id);
@@ -191,7 +190,6 @@
 
   @Test
   public void voteOnBehalfOfWithCommentWritingJson() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     testVoteOnBehalfOfWithComment();
   }
 
@@ -218,7 +216,7 @@
     assertThat(psa.getRealAccountId()).isEqualTo(admin.id);
 
     ChangeData cd = r.getChange();
-    Comment c = Iterables.getOnlyElement(commentsUtil.publishedByChange(db, cd.notes()));
+    Comment c = Iterables.getOnlyElement(commentsUtil.publishedByChange(cd.notes()));
     assertThat(c.message).isEqualTo(ci.message);
     assertThat(c.author.getId()).isEqualTo(user.id);
     assertThat(c.getRealAuthor().getId()).isEqualTo(admin.id);
@@ -226,7 +224,6 @@
 
   @Test
   public void voteOnBehalfOfWithRobotComment() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     allowCodeReviewOnBehalfOf();
     PushOneCommit.Result r = createChange();
 
@@ -342,7 +339,7 @@
     ChangeData cd = r.getChange();
     assertThat(cd.change().getStatus()).isEqualTo(Change.Status.MERGED);
     PatchSetApproval submitter =
-        approvalsUtil.getSubmitter(db, cd.notes(), cd.change().currentPatchSetId());
+        approvalsUtil.getSubmitter(cd.notes(), cd.change().currentPatchSetId());
     assertThat(submitter.getAccountId()).isEqualTo(admin2.id);
     assertThat(submitter.getRealAccountId()).isEqualTo(admin.id);
   }
@@ -520,7 +517,7 @@
     assertThat(psa.getRealAccountId()).isEqualTo(admin.id); // not user2
 
     ChangeData cd = r.getChange();
-    ChangeMessage m = Iterables.getLast(cmUtil.byChange(db, cd.notes()));
+    ChangeMessage m = Iterables.getLast(cmUtil.byChange(cd.notes()));
     assertThat(m.getMessage()).endsWith(in.message);
     assertThat(m.getAuthor()).isEqualTo(user.id);
     assertThat(m.getRealAuthor()).isEqualTo(admin.id); // not user2
diff --git a/javatests/com/google/gerrit/acceptance/rest/binding/ChangesRestApiBindingsIT.java b/javatests/com/google/gerrit/acceptance/rest/binding/ChangesRestApiBindingsIT.java
index 0b64beb..db5dfab 100644
--- a/javatests/com/google/gerrit/acceptance/rest/binding/ChangesRestApiBindingsIT.java
+++ b/javatests/com/google/gerrit/acceptance/rest/binding/ChangesRestApiBindingsIT.java
@@ -14,7 +14,6 @@
 
 package com.google.gerrit.acceptance.rest.binding;
 
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.acceptance.rest.util.RestCall.Method.GET;
 import static com.google.gerrit.extensions.common.testing.RobotCommentInfoSubject.assertThatList;
 import static java.util.stream.Collectors.toList;
@@ -378,8 +377,6 @@
 
   @Test
   public void robotCommentEndpoints() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     String changeId = createChange().getChangeId();
 
     RobotCommentInput robotCommentInput = new RobotCommentInput();
@@ -405,8 +402,6 @@
 
   @Test
   public void fixEndpoints() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     String changeId = createChange("Subject", FILENAME, "content").getChangeId();
 
     RobotCommentInput robotCommentInput = new RobotCommentInput();
diff --git a/javatests/com/google/gerrit/acceptance/rest/change/AbstractSubmit.java b/javatests/com/google/gerrit/acceptance/rest/change/AbstractSubmit.java
index bab4c1d..a4d9a24 100644
--- a/javatests/com/google/gerrit/acceptance/rest/change/AbstractSubmit.java
+++ b/javatests/com/google/gerrit/acceptance/rest/change/AbstractSubmit.java
@@ -905,8 +905,6 @@
 
   @Test
   public void retrySubmitSingleChangeOnLockFailure() throws Exception {
-    assume().that(notesMigration.disableChangeReviewDb()).isTrue();
-
     PushOneCommit.Result change = createChange();
     String id = change.getChangeId();
     approve(id);
@@ -932,7 +930,6 @@
 
   @Test
   public void retrySubmitAfterTornTopicOnLockFailure() throws Exception {
-    assume().that(notesMigration.disableChangeReviewDb()).isTrue();
     assume().that(isSubmitWholeTopicEnabled()).isTrue();
 
     String topic = "test-topic";
@@ -1281,7 +1278,7 @@
     Change c = getOnlyElement(queryProvider.get().byKeyPrefix(changeId)).change();
     ChangeNotes cn = notesFactory.createChecked(db, c);
     PatchSetApproval submitter =
-        approvalsUtil.getSubmitter(db, cn, new PatchSet.Id(cn.getChangeId(), psId));
+        approvalsUtil.getSubmitter(cn, new PatchSet.Id(cn.getChangeId(), psId));
     assertThat(submitter).isNotNull();
     assertThat(submitter.isLegacySubmit()).isTrue();
     assertThat(submitter.getAccountId()).isEqualTo(user.getId());
@@ -1291,7 +1288,7 @@
     Change c = getOnlyElement(queryProvider.get().byKeyPrefix(changeId)).change();
     ChangeNotes cn = notesFactory.createChecked(db, c);
     PatchSetApproval submitter =
-        approvalsUtil.getSubmitter(db, cn, new PatchSet.Id(cn.getChangeId(), psId));
+        approvalsUtil.getSubmitter(cn, new PatchSet.Id(cn.getChangeId(), psId));
     assertThat(submitter).isNull();
   }
 
@@ -1305,7 +1302,7 @@
 
   protected void assertRebase(TestRepository<?> testRepo, boolean contentMerge) throws Exception {
     Repository repo = testRepo.getRepository();
-    RevCommit localHead = getHead(repo);
+    RevCommit localHead = getHead(repo, "HEAD");
     RevCommit remoteHead = getRemoteHead();
     assertThat(localHead.getId()).isNotEqualTo(remoteHead.getId());
     assertThat(remoteHead.getParentCount()).isEqualTo(1);
diff --git a/javatests/com/google/gerrit/acceptance/rest/change/AbstractSubmitByMerge.java b/javatests/com/google/gerrit/acceptance/rest/change/AbstractSubmitByMerge.java
index 29a81ca..fecb6c5 100644
--- a/javatests/com/google/gerrit/acceptance/rest/change/AbstractSubmitByMerge.java
+++ b/javatests/com/google/gerrit/acceptance/rest/change/AbstractSubmitByMerge.java
@@ -17,21 +17,10 @@
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.common.truth.TruthJUnit.assume;
 
-import com.google.common.collect.Iterables;
 import com.google.gerrit.acceptance.PushOneCommit;
 import com.google.gerrit.acceptance.TestProjectInput;
-import com.google.gerrit.extensions.api.changes.SubmitInput;
-import com.google.gerrit.extensions.client.ChangeStatus;
 import com.google.gerrit.extensions.client.InheritableBoolean;
-import com.google.gerrit.extensions.common.ChangeInfo;
-import com.google.gerrit.extensions.restapi.ResourceConflictException;
-import com.google.gerrit.reviewdb.client.Change;
-import com.google.gerrit.reviewdb.client.PatchSet;
-import com.google.gerrit.server.change.TestSubmitInput;
-import org.eclipse.jgit.lib.ObjectId;
-import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.revwalk.RevCommit;
-import org.eclipse.jgit.revwalk.RevWalk;
 import org.junit.Test;
 
 public abstract class AbstractSubmitByMerge extends AbstractSubmit {
@@ -124,58 +113,4 @@
     assertThat(head.getParent(0)).isEqualTo(change1.getCommit());
     assertThat(head.getParent(1)).isEqualTo(change2.getCommit());
   }
-
-  @Test
-  public void repairChangeStateAfterFailure() throws Exception {
-    // In NoteDb-only mode, repo and meta updates are atomic (at least in InMemoryRepository).
-    assume().that(notesMigration.disableChangeReviewDb()).isFalse();
-
-    RevCommit initialHead = getRemoteHead();
-    PushOneCommit.Result change = createChange("Change 1", "a.txt", "content");
-    submit(change.getChangeId());
-    RevCommit afterChange1Head = getRemoteHead();
-
-    testRepo.reset(initialHead);
-    PushOneCommit.Result change2 = createChange("Change 2", "b.txt", "other content");
-    Change.Id id2 = change2.getChange().getId();
-    TestSubmitInput failInput = new TestSubmitInput();
-    failInput.failAfterRefUpdates = true;
-    submit(
-        change2.getChangeId(),
-        failInput,
-        ResourceConflictException.class,
-        "Failing after ref updates");
-
-    // Bad: ref advanced but change wasn't updated.
-    PatchSet.Id psId1 = new PatchSet.Id(id2, 1);
-    ChangeInfo info = gApi.changes().id(id2.get()).get();
-    assertThat(info.status).isEqualTo(ChangeStatus.NEW);
-    assertThat(info.revisions.get(info.currentRevision)._number).isEqualTo(1);
-
-    RevCommit tip;
-    try (Repository repo = repoManager.openRepository(project);
-        RevWalk rw = new RevWalk(repo)) {
-      ObjectId rev1 = repo.exactRef(psId1.toRefName()).getObjectId();
-      assertThat(rev1).isNotNull();
-
-      tip = rw.parseCommit(repo.exactRef("refs/heads/master").getObjectId());
-      assertThat(tip.getParentCount()).isEqualTo(2);
-      assertThat(tip.getParent(0)).isEqualTo(afterChange1Head);
-      assertThat(tip.getParent(1)).isEqualTo(change2.getCommit());
-    }
-
-    submit(change2.getChangeId(), new SubmitInput(), null, null);
-
-    // Change status and patch set entities were updated, and branch tip stayed
-    // the same.
-    info = gApi.changes().id(id2.get()).get();
-    assertThat(info.status).isEqualTo(ChangeStatus.MERGED);
-    assertThat(info.revisions.get(info.currentRevision)._number).isEqualTo(1);
-    assertThat(Iterables.getLast(info.messages).message)
-        .isEqualTo("Change has been successfully merged by Administrator");
-
-    try (Repository repo = repoManager.openRepository(project)) {
-      assertThat(repo.exactRef("refs/heads/master").getObjectId()).isEqualTo(tip);
-    }
-  }
 }
diff --git a/javatests/com/google/gerrit/acceptance/rest/change/AbstractSubmitByRebase.java b/javatests/com/google/gerrit/acceptance/rest/change/AbstractSubmitByRebase.java
index 0a92cfb..e8e896d 100644
--- a/javatests/com/google/gerrit/acceptance/rest/change/AbstractSubmitByRebase.java
+++ b/javatests/com/google/gerrit/acceptance/rest/change/AbstractSubmitByRebase.java
@@ -15,13 +15,11 @@
 package com.google.gerrit.acceptance.rest.change;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.acceptance.GitUtil.getChangeId;
 import static com.google.gerrit.acceptance.GitUtil.pushHead;
 import static com.google.gerrit.server.group.SystemGroupBackend.REGISTERED_USERS;
 
 import com.google.common.collect.ImmutableList;
-import com.google.common.collect.Iterables;
 import com.google.gerrit.acceptance.PushOneCommit;
 import com.google.gerrit.acceptance.TestAccount;
 import com.google.gerrit.acceptance.TestProjectInput;
@@ -30,12 +28,8 @@
 import com.google.gerrit.extensions.client.InheritableBoolean;
 import com.google.gerrit.extensions.client.SubmitType;
 import com.google.gerrit.extensions.common.ChangeInfo;
-import com.google.gerrit.extensions.restapi.ResourceConflictException;
 import com.google.gerrit.reviewdb.client.Branch;
-import com.google.gerrit.reviewdb.client.Change;
-import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.client.Project;
-import com.google.gerrit.server.change.TestSubmitInput;
 import com.google.gerrit.server.project.testing.Util;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.Repository;
@@ -242,80 +236,6 @@
     assertChangeMergedEvents(change.getChangeId(), headAfterFirstSubmit.name());
   }
 
-  @Test
-  public void repairChangeStateAfterFailure() throws Exception {
-    // In NoteDb-only mode, repo and meta updates are atomic (at least in InMemoryRepository).
-    assume().that(notesMigration.disableChangeReviewDb()).isFalse();
-
-    RevCommit initialHead = getRemoteHead();
-    PushOneCommit.Result change = createChange("Change 1", "a.txt", "content");
-    submit(change.getChangeId());
-
-    RevCommit headAfterFirstSubmit = getRemoteHead();
-    testRepo.reset(initialHead);
-    PushOneCommit.Result change2 = createChange("Change 2", "b.txt", "other content");
-    Change.Id id2 = change2.getChange().getId();
-    TestSubmitInput failInput = new TestSubmitInput();
-    failInput.failAfterRefUpdates = true;
-    submit(
-        change2.getChangeId(),
-        failInput,
-        ResourceConflictException.class,
-        "Failing after ref updates");
-    RevCommit headAfterFailedSubmit = getRemoteHead();
-
-    // Bad: ref advanced but change wasn't updated.
-    PatchSet.Id psId1 = new PatchSet.Id(id2, 1);
-    PatchSet.Id psId2 = new PatchSet.Id(id2, 2);
-    ChangeInfo info = gApi.changes().id(id2.get()).get();
-    assertThat(info.status).isEqualTo(ChangeStatus.NEW);
-    assertThat(info.revisions.get(info.currentRevision)._number).isEqualTo(1);
-    assertThat(getPatchSet(psId2)).isNull();
-
-    ObjectId rev2;
-    try (Repository repo = repoManager.openRepository(project);
-        RevWalk rw = new RevWalk(repo)) {
-      ObjectId rev1 = repo.exactRef(psId1.toRefName()).getObjectId();
-      assertThat(rev1).isNotNull();
-
-      rev2 = repo.exactRef(psId2.toRefName()).getObjectId();
-      assertThat(rev2).isNotNull();
-      assertThat(rev2).isNotEqualTo(rev1);
-      assertThat(rw.parseCommit(rev2).getParent(0)).isEqualTo(headAfterFirstSubmit);
-
-      assertThat(repo.exactRef("refs/heads/master").getObjectId()).isEqualTo(rev2);
-    }
-
-    submit(change2.getChangeId());
-    RevCommit headAfterSecondSubmit = getRemoteHead();
-    assertThat(headAfterSecondSubmit).isEqualTo(headAfterFailedSubmit);
-
-    // Change status and patch set entities were updated, and branch tip stayed
-    // the same.
-    info = gApi.changes().id(id2.get()).get();
-    assertThat(info.status).isEqualTo(ChangeStatus.MERGED);
-    assertThat(info.revisions.get(info.currentRevision)._number).isEqualTo(2);
-    PatchSet ps2 = getPatchSet(psId2);
-    assertThat(ps2).isNotNull();
-    assertThat(ps2.getRevision().get()).isEqualTo(rev2.name());
-    assertThat(Iterables.getLast(info.messages).message)
-        .isEqualTo(
-            "Change has been successfully rebased and submitted as "
-                + rev2.name()
-                + " by Administrator");
-
-    try (Repository repo = repoManager.openRepository(project)) {
-      assertThat(repo.exactRef("refs/heads/master").getObjectId()).isEqualTo(rev2);
-    }
-
-    assertRefUpdatedEvents(initialHead, headAfterFirstSubmit);
-    assertChangeMergedEvents(
-        change.getChangeId(),
-        headAfterFirstSubmit.name(),
-        change2.getChangeId(),
-        headAfterSecondSubmit.name());
-  }
-
   protected RevCommit parse(ObjectId id) throws Exception {
     try (Repository repo = repoManager.openRepository(project);
         RevWalk rw = new RevWalk(repo)) {
diff --git a/javatests/com/google/gerrit/acceptance/rest/change/AssigneeIT.java b/javatests/com/google/gerrit/acceptance/rest/change/AssigneeIT.java
index 69035f2..c925d88 100644
--- a/javatests/com/google/gerrit/acceptance/rest/change/AssigneeIT.java
+++ b/javatests/com/google/gerrit/acceptance/rest/change/AssigneeIT.java
@@ -15,7 +15,6 @@
 package com.google.gerrit.acceptance.rest.change;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.extensions.client.ListChangesOption.DETAILED_LABELS;
 import static com.google.gerrit.server.group.SystemGroupBackend.REGISTERED_USERS;
 import static java.util.concurrent.TimeUnit.SECONDS;
@@ -79,7 +78,6 @@
 
   @Test
   public void getPastAssignees() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     PushOneCommit.Result r = createChange();
     setAssignee(r, user.email);
     setAssignee(r, admin.email);
@@ -92,14 +90,7 @@
 
   @Test
   public void assigneeAddedAsReviewer() throws Exception {
-    ReviewerState state;
-    // Assignee is added as CC, if back-end is reviewDb (that does not support
-    // CC) CC is stored as REVIEWER
-    if (notesMigration.readChanges()) {
-      state = ReviewerState.CC;
-    } else {
-      state = ReviewerState.REVIEWER;
-    }
+    ReviewerState state = ReviewerState.CC;
     PushOneCommit.Result r = createChange();
     Iterable<AccountInfo> reviewers = getReviewers(r, state);
     assertThat(reviewers).isNull();
diff --git a/javatests/com/google/gerrit/acceptance/rest/change/ChangeMessagesIT.java b/javatests/com/google/gerrit/acceptance/rest/change/ChangeMessagesIT.java
index 790b884..48cb050 100644
--- a/javatests/com/google/gerrit/acceptance/rest/change/ChangeMessagesIT.java
+++ b/javatests/com/google/gerrit/acceptance/rest/change/ChangeMessagesIT.java
@@ -251,10 +251,7 @@
     List<ChangeMessageInfo> messagesBeforeDeletion = gApi.changes().id(changeNum).messages();
 
     List<CommentInfo> commentsBefore = getChangeSortedComments(changeNum);
-    List<RevCommit> commitsBefore = new ArrayList<>();
-    if (notesMigration.readChanges()) {
-      commitsBefore = getChangeMetaCommitsInReverseOrder(new Change.Id(changeNum));
-    }
+    List<RevCommit> commitsBefore = getChangeMetaCommitsInReverseOrder(new Change.Id(changeNum));
 
     String id = messagesBeforeDeletion.get(deletedMessageIndex).id;
     DeleteChangeMessageInput input = new DeleteChangeMessageInput(reason);
@@ -271,11 +268,9 @@
     List<ChangeInfo> changes = gApi.changes().query("message removed").get();
     assertThat(changes.stream().map(c -> c._number).collect(toSet())).contains(changeNum);
 
-    // Verifies states of commits if NoteDb is on.
-    if (notesMigration.readChanges()) {
-      assertMetaCommitsAfterDeletion(
-          commitsBefore, changeNum, deletedMessageIndex, deletedBy, reason);
-    }
+    // Verifies states of commits.
+    assertMetaCommitsAfterDeletion(
+        commitsBefore, changeNum, deletedMessageIndex, deletedBy, reason);
   }
 
   private void assertMessagesAfterDeletion(
diff --git a/javatests/com/google/gerrit/acceptance/rest/change/ChangeReviewersByEmailIT.java b/javatests/com/google/gerrit/acceptance/rest/change/ChangeReviewersByEmailIT.java
index dc71c1f..2a397e4 100644
--- a/javatests/com/google/gerrit/acceptance/rest/change/ChangeReviewersByEmailIT.java
+++ b/javatests/com/google/gerrit/acceptance/rest/change/ChangeReviewersByEmailIT.java
@@ -15,7 +15,6 @@
 package com.google.gerrit.acceptance.rest.change;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.extensions.client.ListChangesOption.DETAILED_LABELS;
 
 import com.google.common.collect.ImmutableList;
@@ -52,7 +51,6 @@
 
   @Test
   public void addByEmail() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     AccountInfo acc = new AccountInfo("Foo Bar", "foo.bar@gerritcodereview.com");
 
     for (ReviewerState state : ImmutableList.of(ReviewerState.CC, ReviewerState.REVIEWER)) {
@@ -72,7 +70,6 @@
 
   @Test
   public void addByEmailAndById() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     AccountInfo byEmail = new AccountInfo("Foo Bar", "foo.bar@gerritcodereview.com");
     AccountInfo byId = new AccountInfo(user.id.get());
 
@@ -98,7 +95,6 @@
 
   @Test
   public void listReviewersByEmail() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     AccountInfo acc = new AccountInfo("Foo Bar", "foo.bar@gerritcodereview.com");
 
     for (ReviewerState state : ImmutableList.of(ReviewerState.CC, ReviewerState.REVIEWER)) {
@@ -126,7 +122,6 @@
 
   @Test
   public void removeByEmail() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     AccountInfo acc = new AccountInfo("Foo Bar", "foo.bar@gerritcodereview.com");
 
     for (ReviewerState state : ImmutableList.of(ReviewerState.CC, ReviewerState.REVIEWER)) {
@@ -146,7 +141,6 @@
 
   @Test
   public void convertFromCCToReviewer() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     AccountInfo acc = new AccountInfo("Foo Bar", "foo.bar@gerritcodereview.com");
 
     PushOneCommit.Result r = createChange();
@@ -168,7 +162,6 @@
 
   @Test
   public void addedReviewersGetNotified() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     AccountInfo acc = new AccountInfo("Foo Bar", "foo.bar@gerritcodereview.com");
 
     for (ReviewerState state : ImmutableList.of(ReviewerState.CC, ReviewerState.REVIEWER)) {
@@ -188,7 +181,6 @@
 
   @Test
   public void removingReviewerTriggersNotification() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     AccountInfo acc = new AccountInfo("Foo Bar", "foo.bar@gerritcodereview.com");
 
     for (ReviewerState state : ImmutableList.of(ReviewerState.CC, ReviewerState.REVIEWER)) {
@@ -221,7 +213,6 @@
 
   @Test
   public void reviewerAndCCReceiveRegularNotification() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     AccountInfo acc = new AccountInfo("Foo Bar", "foo.bar@gerritcodereview.com");
 
     for (ReviewerState state : ImmutableList.of(ReviewerState.CC, ReviewerState.REVIEWER)) {
@@ -244,8 +235,6 @@
 
   @Test
   public void reviewerAndCCReceiveSameEmail() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     PushOneCommit.Result r = createChange();
     for (ReviewerState state : ImmutableList.of(ReviewerState.CC, ReviewerState.REVIEWER)) {
       for (int i = 0; i < 10; i++) {
@@ -270,8 +259,6 @@
 
   @Test
   public void addingMultipleReviewersAndCCsAtOnceSendsOnlyOneEmail() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     PushOneCommit.Result r = createChange();
     ReviewInput reviewInput = new ReviewInput();
     for (ReviewerState state : ImmutableList.of(ReviewerState.CC, ReviewerState.REVIEWER)) {
@@ -288,7 +275,6 @@
 
   @Test
   public void rejectMissingEmail() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     PushOneCommit.Result r = createChange();
 
     AddReviewerResult result = gApi.changes().id(r.getChangeId()).addReviewer("");
@@ -298,7 +284,6 @@
 
   @Test
   public void rejectMalformedEmail() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     PushOneCommit.Result r = createChange();
 
     AddReviewerResult result = gApi.changes().id(r.getChangeId()).addReviewer("Foo Bar <foo.bar@");
@@ -308,8 +293,6 @@
 
   @Test
   public void rejectWhenFeatureIsDisabled() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     ConfigInput conf = new ConfigInput();
     conf.enableReviewerByEmail = InheritableBoolean.FALSE;
     gApi.projects().name(project.get()).config(conf);
@@ -326,7 +309,6 @@
 
   @Test
   public void reviewersByEmailAreServedFromIndex() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     AccountInfo acc = new AccountInfo("Foo Bar", "foo.bar@gerritcodereview.com");
 
     for (ReviewerState state : ImmutableList.of(ReviewerState.CC, ReviewerState.REVIEWER)) {
@@ -351,7 +333,6 @@
 
   @Test
   public void addExistingReviewerByEmailShortCircuits() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     PushOneCommit.Result r = createChange();
 
     AddReviewerInput input = new AddReviewerInput();
@@ -369,7 +350,6 @@
 
   @Test
   public void addExistingCcByEmailShortCircuits() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     PushOneCommit.Result r = createChange();
 
     AddReviewerInput input = new AddReviewerInput();
diff --git a/javatests/com/google/gerrit/acceptance/rest/change/ChangeReviewersIT.java b/javatests/com/google/gerrit/acceptance/rest/change/ChangeReviewersIT.java
index 6a9a27c..069607a 100644
--- a/javatests/com/google/gerrit/acceptance/rest/change/ChangeReviewersIT.java
+++ b/javatests/com/google/gerrit/acceptance/rest/change/ChangeReviewersIT.java
@@ -15,7 +15,6 @@
 package com.google.gerrit.acceptance.rest.change;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.extensions.client.ListChangesOption.DETAILED_LABELS;
 import static com.google.gerrit.extensions.client.ReviewerState.CC;
 import static com.google.gerrit.extensions.client.ReviewerState.REMOVED;
@@ -134,31 +133,18 @@
     assertThat(result.confirm).isNull();
     assertThat(result.error).isNull();
     ChangeInfo c = gApi.changes().id(r.getChangeId()).get();
-    if (notesMigration.readChanges()) {
-      assertThat(result.reviewers).isNull();
-      assertThat(result.ccs).hasSize(1);
-      AccountInfo ai = result.ccs.get(0);
-      assertThat(ai._accountId).isEqualTo(user.id.get());
-      assertReviewers(c, CC, user);
-    } else {
-      assertThat(result.ccs).isNull();
-      assertThat(result.reviewers).hasSize(1);
-      AccountInfo ai = result.reviewers.get(0);
-      assertThat(ai._accountId).isEqualTo(user.id.get());
-      assertReviewers(c, REVIEWER, user);
-    }
+    assertThat(result.reviewers).isNull();
+    assertThat(result.ccs).hasSize(1);
+    AccountInfo ai = result.ccs.get(0);
+    assertThat(ai._accountId).isEqualTo(user.id.get());
+    assertReviewers(c, CC, user);
 
     // Verify email was sent to CCed account.
     List<Message> messages = sender.getMessages();
     assertThat(messages).hasSize(1);
     Message m = messages.get(0);
     assertThat(m.rcpt()).containsExactly(user.emailAddress);
-    if (notesMigration.readChanges()) {
-      assertThat(m.body()).contains(admin.fullName + " has uploaded this change for review.");
-    } else {
-      assertThat(m.body()).contains("Hello " + user.fullName + ",\n");
-      assertThat(m.body()).contains("I'd like you to do a code review.");
-    }
+    assertThat(m.body()).contains(admin.fullName + " has uploaded this change for review.");
   }
 
   @Test
@@ -185,18 +171,9 @@
     assertThat(result.input).isEqualTo(in.reviewer);
     assertThat(result.confirm).isNull();
     assertThat(result.error).isNull();
-    if (notesMigration.readChanges()) {
-      assertThat(result.reviewers).isNull();
-    } else {
-      assertThat(result.ccs).isNull();
-    }
+    assertThat(result.reviewers).isNull();
     ChangeInfo c = gApi.changes().id(r.getChangeId()).get();
-    if (notesMigration.readChanges()) {
-      assertReviewers(c, CC, firstUsers);
-    } else {
-      assertReviewers(c, REVIEWER, firstUsers);
-      assertReviewers(c, CC);
-    }
+    assertReviewers(c, CC, firstUsers);
 
     // Verify emails were sent to each of the group's accounts.
     List<Message> messages = sender.getMessages();
@@ -222,19 +199,10 @@
     assertThat(result.confirm).isNull();
     assertThat(result.error).isNull();
     c = gApi.changes().id(r.getChangeId()).get();
-    if (notesMigration.readChanges()) {
-      assertThat(result.ccs).hasSize(3);
-      assertThat(result.reviewers).isNull();
-      assertReviewers(c, REVIEWER, reviewer);
-      assertReviewers(c, CC, users);
-    } else {
-      assertThat(result.ccs).isNull();
-      assertThat(result.reviewers).hasSize(3);
-      List<TestAccount> expectedUsers = new ArrayList<>(users.size() + 2);
-      expectedUsers.addAll(users);
-      expectedUsers.add(reviewer);
-      assertReviewers(c, REVIEWER, expectedUsers);
-    }
+    assertThat(result.ccs).hasSize(3);
+    assertThat(result.reviewers).isNull();
+    assertReviewers(c, REVIEWER, reviewer);
+    assertReviewers(c, CC, users);
 
     messages = sender.getMessages();
     assertThat(messages).hasSize(1);
@@ -243,11 +211,6 @@
     for (int i = 0; i < 3; i++) {
       expectedAddresses.add(users.get(users.size() - i - 1).emailAddress);
     }
-    if (!notesMigration.readChanges()) {
-      for (int i = 0; i < 3; i++) {
-        expectedAddresses.add(users.get(i).emailAddress);
-      }
-    }
     expectedAddresses.add(reviewer.emailAddress);
     assertThat(m.rcpt()).containsExactlyElementsIn(expectedAddresses);
   }
@@ -261,13 +224,8 @@
     in.state = CC;
     addReviewer(changeId, in);
     ChangeInfo c = gApi.changes().id(r.getChangeId()).get();
-    if (notesMigration.readChanges()) {
-      assertReviewers(c, REVIEWER);
-      assertReviewers(c, CC, user);
-    } else {
-      assertReviewers(c, REVIEWER, user);
-      assertReviewers(c, CC);
-    }
+    assertReviewers(c, REVIEWER);
+    assertReviewers(c, CC, user);
 
     in.state = REVIEWER;
     addReviewer(changeId, in);
@@ -293,15 +251,8 @@
 
     // Verify user is added to CC list.
     ChangeInfo c = gApi.changes().id(r.getChangeId()).get();
-    if (notesMigration.readChanges()) {
-      assertReviewers(c, REVIEWER);
-      assertReviewers(c, CC, user);
-    } else {
-      // If we aren't reading from NoteDb, the user will appear as a
-      // reviewer.
-      assertReviewers(c, REVIEWER, user);
-      assertReviewers(c, CC);
-    }
+    assertReviewers(c, REVIEWER);
+    assertReviewers(c, CC, user);
   }
 
   @Test
@@ -350,26 +301,13 @@
 
     // Verify reviewer state.
     ChangeInfo c = gApi.changes().id(r.getChangeId()).get();
-    if (notesMigration.readChanges()) {
-      assertReviewers(c, REVIEWER);
-      assertReviewers(c, CC, user);
-      // Verify no approvals were added.
-      assertThat(c.labels).isNotNull();
-      LabelInfo label = c.labels.get("Code-Review");
-      assertThat(label).isNotNull();
-      assertThat(label.all).isNull();
-    } else {
-      // When approvals are stored in ReviewDb, we still create a label for
-      // the reviewing user, and force them into the REVIEWER state.
-      assertReviewers(c, REVIEWER, user);
-      assertReviewers(c, CC);
-      LabelInfo label = c.labels.get("Code-Review");
-      assertThat(label).isNotNull();
-      assertThat(label.all).isNotNull();
-      assertThat(label.all).hasSize(1);
-      ApprovalInfo approval = label.all.get(0);
-      assertThat(approval._accountId).isEqualTo(user.getId().get());
-    }
+    assertReviewers(c, REVIEWER);
+    assertReviewers(c, CC, user);
+    // Verify no approvals were added.
+    assertThat(c.labels).isNotNull();
+    LabelInfo label = c.labels.get("Code-Review");
+    assertThat(label).isNotNull();
+    assertThat(label.all).isNull();
   }
 
   @Test
@@ -449,14 +387,8 @@
     // Verify reviewer and CC were added. If not in NoteDb read mode, both
     // parties will be returned as CCed.
     ChangeInfo c = gApi.changes().id(r.getChangeId()).get();
-    if (notesMigration.readChanges()) {
-      assertReviewers(c, REVIEWER, admin, user);
-      assertReviewers(c, CC, observer);
-    } else {
-      // In legacy mode, everyone should be a reviewer.
-      assertReviewers(c, REVIEWER, admin, user, observer);
-      assertReviewers(c, CC);
-    }
+    assertReviewers(c, REVIEWER, admin, user);
+    assertReviewers(c, CC, observer);
 
     // Verify emails were sent to added reviewers.
     List<Message> messages = sender.getMessages();
@@ -549,23 +481,12 @@
     c = gApi.changes().id(r.getChangeId()).get();
     assertThat(c.messages).hasSize(2);
 
-    if (notesMigration.readChanges()) {
-      assertReviewers(c, REVIEWER, admin, user);
-      assertReviewers(c, CC, users.subList(0, mediumGroupSize));
-    } else {
-      // If not in NoteDb mode, then everyone is a REVIEWER.
-      List<TestAccount> expected = users.subList(0, mediumGroupSize);
-      expected.add(admin);
-      expected.add(user);
-      assertReviewers(c, REVIEWER, expected);
-      assertReviewers(c, CC);
-    }
+    assertReviewers(c, REVIEWER, admin, user);
+    assertReviewers(c, CC, users.subList(0, mediumGroupSize));
   }
 
   @Test
   public void noteDbAddReviewerToReviewerChangeInfo() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     PushOneCommit.Result r = createChange();
     String changeId = r.getChangeId();
     AddReviewerInput in = new AddReviewerInput();
@@ -645,9 +566,6 @@
     assertThat(reviewerResult.reviewers).hasSize(1);
 
     // Repeat the above for CCs
-    if (!notesMigration.readChanges()) {
-      return;
-    }
     r = createChange();
     input = ReviewInput.approve().reviewer(group1, CC, false).reviewer(group2, CC, false);
     result = review(r.getChangeId(), r.getCommit().name(), input);
@@ -792,7 +710,6 @@
 
   @Test
   public void addExistingReviewerShortCircuits() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     PushOneCommit.Result r = createChange();
 
     AddReviewerInput input = new AddReviewerInput();
@@ -809,7 +726,6 @@
 
   @Test
   public void addExistingCcShortCircuits() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     PushOneCommit.Result r = createChange();
 
     AddReviewerInput input = new AddReviewerInput();
diff --git a/javatests/com/google/gerrit/acceptance/rest/change/CreateChangeIT.java b/javatests/com/google/gerrit/acceptance/rest/change/CreateChangeIT.java
index 9218336..28252e5 100644
--- a/javatests/com/google/gerrit/acceptance/rest/change/CreateChangeIT.java
+++ b/javatests/com/google/gerrit/acceptance/rest/change/CreateChangeIT.java
@@ -15,7 +15,6 @@
 package com.google.gerrit.acceptance.rest.change;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.common.data.Permission.READ;
 import static com.google.gerrit.reviewdb.client.RefNames.changeMetaRef;
 import static com.google.gerrit.server.group.SystemGroupBackend.REGISTERED_USERS;
@@ -276,8 +275,6 @@
 
   @Test
   public void noteDbCommit() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     ChangeInfo c = assertCreateSucceeds(newChangeInput(ChangeStatus.NEW));
     try (Repository repo = repoManager.openRepository(project);
         RevWalk rw = new RevWalk(repo)) {
diff --git a/javatests/com/google/gerrit/acceptance/rest/change/HashtagsIT.java b/javatests/com/google/gerrit/acceptance/rest/change/HashtagsIT.java
index 864f08d..47ec0d2 100644
--- a/javatests/com/google/gerrit/acceptance/rest/change/HashtagsIT.java
+++ b/javatests/com/google/gerrit/acceptance/rest/change/HashtagsIT.java
@@ -15,7 +15,6 @@
 package com.google.gerrit.acceptance.rest.change;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.server.group.SystemGroupBackend.REGISTERED_USERS;
 import static java.util.Objects.requireNonNull;
 import static java.util.concurrent.TimeUnit.SECONDS;
@@ -33,17 +32,11 @@
 import com.google.gerrit.extensions.restapi.BadRequestException;
 import com.google.gerrit.testing.TestTimeUtil;
 import org.junit.AfterClass;
-import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
 @NoHttpd
 public class HashtagsIT extends AbstractDaemonTest {
-  @Before
-  public void before() {
-    assume().that(notesMigration.readChanges()).isTrue();
-  }
-
   @BeforeClass
   public static void setTimeForTesting() {
     TestTimeUtil.resetWithClockStep(1, SECONDS);
diff --git a/javatests/com/google/gerrit/acceptance/rest/change/SubmitByCherryPickIT.java b/javatests/com/google/gerrit/acceptance/rest/change/SubmitByCherryPickIT.java
index 8160d9a..8a81d6d 100644
--- a/javatests/com/google/gerrit/acceptance/rest/change/SubmitByCherryPickIT.java
+++ b/javatests/com/google/gerrit/acceptance/rest/change/SubmitByCherryPickIT.java
@@ -15,7 +15,6 @@
 package com.google.gerrit.acceptance.rest.change;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.extensions.client.ListChangesOption.CURRENT_REVISION;
 import static com.google.gerrit.extensions.client.ListChangesOption.MESSAGES;
 
@@ -31,19 +30,13 @@
 import com.google.gerrit.extensions.common.ChangeInfo;
 import com.google.gerrit.extensions.registration.DynamicSet;
 import com.google.gerrit.extensions.registration.RegistrationHandle;
-import com.google.gerrit.extensions.restapi.ResourceConflictException;
 import com.google.gerrit.reviewdb.client.Branch;
-import com.google.gerrit.reviewdb.client.Change;
-import com.google.gerrit.reviewdb.client.PatchSet;
-import com.google.gerrit.server.change.TestSubmitInput;
 import com.google.gerrit.server.git.ChangeMessageModifier;
 import com.google.gerrit.server.submit.CommitMergeStatus;
 import com.google.inject.Inject;
 import java.util.List;
 import org.eclipse.jgit.lib.ObjectId;
-import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.revwalk.RevCommit;
-import org.eclipse.jgit.revwalk.RevWalk;
 import org.junit.Test;
 
 public class SubmitByCherryPickIT extends AbstractSubmit {
@@ -389,76 +382,4 @@
         change2.getChangeId(),
         headAfterFirstSubmit.name());
   }
-
-  @Test
-  public void repairChangeStateAfterFailure() throws Exception {
-    // In NoteDb-only mode, repo and meta updates are atomic (at least in InMemoryRepository).
-    assume().that(notesMigration.disableChangeReviewDb()).isFalse();
-
-    RevCommit initialHead = getRemoteHead();
-    PushOneCommit.Result change = createChange("Change 1", "a.txt", "content");
-    submit(change.getChangeId());
-
-    RevCommit headAfterFirstSubmit = getRemoteHead();
-    testRepo.reset(initialHead);
-    PushOneCommit.Result change2 = createChange("Change 2", "b.txt", "other content");
-    Change.Id id2 = change2.getChange().getId();
-    TestSubmitInput failInput = new TestSubmitInput();
-    failInput.failAfterRefUpdates = true;
-    submit(
-        change2.getChangeId(),
-        failInput,
-        ResourceConflictException.class,
-        "Failing after ref updates");
-    RevCommit headAfterFailedSubmit = getRemoteHead();
-
-    // Bad: ref advanced but change wasn't updated.
-    PatchSet.Id psId1 = new PatchSet.Id(id2, 1);
-    PatchSet.Id psId2 = new PatchSet.Id(id2, 2);
-    ChangeInfo info = gApi.changes().id(id2.get()).get();
-    assertThat(info.status).isEqualTo(ChangeStatus.NEW);
-    assertThat(info.revisions.get(info.currentRevision)._number).isEqualTo(1);
-    assertThat(getPatchSet(psId2)).isNull();
-
-    ObjectId rev2;
-    try (Repository repo = repoManager.openRepository(project);
-        RevWalk rw = new RevWalk(repo)) {
-      ObjectId rev1 = repo.exactRef(psId1.toRefName()).getObjectId();
-      assertThat(rev1).isNotNull();
-
-      rev2 = repo.exactRef(psId2.toRefName()).getObjectId();
-      assertThat(rev2).isNotNull();
-      assertThat(rev2).isNotEqualTo(rev1);
-      assertThat(rw.parseCommit(rev2).getParent(0)).isEqualTo(headAfterFirstSubmit);
-
-      assertThat(repo.exactRef("refs/heads/master").getObjectId()).isEqualTo(rev2);
-    }
-
-    submit(change2.getChangeId());
-
-    // Change status and patch set entities were updated, and branch tip stayed
-    // the same.
-    RevCommit headAfterSecondSubmit = getRemoteHead();
-    assertThat(headAfterSecondSubmit).isEqualTo(headAfterFailedSubmit);
-    info = gApi.changes().id(id2.get()).get();
-    assertThat(info.status).isEqualTo(ChangeStatus.MERGED);
-    assertThat(info.revisions.get(info.currentRevision)._number).isEqualTo(2);
-    PatchSet ps2 = getPatchSet(psId2);
-    assertThat(ps2).isNotNull();
-    assertThat(ps2.getRevision().get()).isEqualTo(rev2.name());
-    assertThat(Iterables.getLast(info.messages).message)
-        .isEqualTo(
-            "Change has been successfully cherry-picked as " + rev2.name() + " by Administrator");
-
-    try (Repository repo = repoManager.openRepository(project)) {
-      assertThat(repo.exactRef("refs/heads/master").getObjectId()).isEqualTo(rev2);
-    }
-
-    assertRefUpdatedEvents(initialHead, headAfterFirstSubmit);
-    assertChangeMergedEvents(
-        change.getChangeId(),
-        headAfterFirstSubmit.name(),
-        change2.getChangeId(),
-        headAfterSecondSubmit.name());
-  }
 }
diff --git a/javatests/com/google/gerrit/acceptance/rest/change/SubmitByFastForwardIT.java b/javatests/com/google/gerrit/acceptance/rest/change/SubmitByFastForwardIT.java
index ea8b98a..ccb684c 100644
--- a/javatests/com/google/gerrit/acceptance/rest/change/SubmitByFastForwardIT.java
+++ b/javatests/com/google/gerrit/acceptance/rest/change/SubmitByFastForwardIT.java
@@ -15,26 +15,16 @@
 package com.google.gerrit.acceptance.rest.change;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.acceptance.GitUtil.pushHead;
 
-import com.google.common.collect.Iterables;
 import com.google.gerrit.acceptance.GitUtil;
 import com.google.gerrit.acceptance.PushOneCommit;
 import com.google.gerrit.common.data.Permission;
-import com.google.gerrit.extensions.client.ChangeStatus;
 import com.google.gerrit.extensions.client.SubmitType;
 import com.google.gerrit.extensions.common.ActionInfo;
-import com.google.gerrit.extensions.common.ChangeInfo;
-import com.google.gerrit.extensions.restapi.ResourceConflictException;
 import com.google.gerrit.reviewdb.client.Change;
-import com.google.gerrit.reviewdb.client.PatchSet;
-import com.google.gerrit.server.change.TestSubmitInput;
 import java.util.Map;
-import org.eclipse.jgit.lib.ObjectId;
-import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.revwalk.RevCommit;
-import org.eclipse.jgit.revwalk.RevWalk;
 import org.eclipse.jgit.transport.PushResult;
 import org.junit.Test;
 
@@ -146,52 +136,6 @@
   }
 
   @Test
-  public void repairChangeStateAfterFailure() throws Exception {
-    // In NoteDb-only mode, repo and meta updates are atomic (at least in InMemoryRepository).
-    assume().that(notesMigration.disableChangeReviewDb()).isFalse();
-
-    PushOneCommit.Result change = createChange("Change 1", "a.txt", "content");
-    Change.Id id = change.getChange().getId();
-    TestSubmitInput failInput = new TestSubmitInput();
-    failInput.failAfterRefUpdates = true;
-    submit(
-        change.getChangeId(),
-        failInput,
-        ResourceConflictException.class,
-        "Failing after ref updates");
-
-    // Bad: ref advanced but change wasn't updated.
-    PatchSet.Id psId = new PatchSet.Id(id, 1);
-    ChangeInfo info = gApi.changes().id(id.get()).get();
-    assertThat(info.status).isEqualTo(ChangeStatus.NEW);
-    assertThat(info.revisions.get(info.currentRevision)._number).isEqualTo(1);
-
-    ObjectId rev;
-    try (Repository repo = repoManager.openRepository(project);
-        RevWalk rw = new RevWalk(repo)) {
-      rev = repo.exactRef(psId.toRefName()).getObjectId();
-      assertThat(rev).isNotNull();
-      assertThat(repo.exactRef("refs/heads/master").getObjectId()).isEqualTo(rev);
-    }
-
-    submit(change.getChangeId());
-
-    // Change status was updated, and branch tip stayed the same.
-    info = gApi.changes().id(id.get()).get();
-    assertThat(info.status).isEqualTo(ChangeStatus.MERGED);
-    assertThat(info.revisions.get(info.currentRevision)._number).isEqualTo(1);
-    assertThat(Iterables.getLast(info.messages).message)
-        .isEqualTo("Change has been successfully merged by Administrator");
-
-    try (Repository repo = repoManager.openRepository(project)) {
-      assertThat(repo.exactRef("refs/heads/master").getObjectId()).isEqualTo(rev);
-    }
-
-    assertRefUpdatedEvents();
-    assertChangeMergedEvents(change.getChangeId(), getRemoteHead().name());
-  }
-
-  @Test
   public void submitSameCommitsAsInExperimentalBranch() throws Exception {
     RevCommit initialHead = getRemoteHead();
 
diff --git a/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java b/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java
index 0d40a1c..a352baa 100644
--- a/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java
+++ b/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java
@@ -16,7 +16,6 @@
 
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.common.truth.Truth8.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.acceptance.PushOneCommit.FILE_NAME;
 import static com.google.gerrit.acceptance.PushOneCommit.SUBJECT;
 import static java.util.stream.Collectors.groupingBy;
@@ -946,7 +945,6 @@
 
   @Test
   public void jsonCommentHasLegacyFormatFalse() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     PushOneCommit.Result result = createChange();
     Change.Id changeId = result.getChange().getId();
     addComment(result.getChangeId(), "comment");
diff --git a/javatests/com/google/gerrit/acceptance/server/change/ConsistencyCheckerIT.java b/javatests/com/google/gerrit/acceptance/server/change/ConsistencyCheckerIT.java
index 7a30f79..9b6083f 100644
--- a/javatests/com/google/gerrit/acceptance/server/change/ConsistencyCheckerIT.java
+++ b/javatests/com/google/gerrit/acceptance/server/change/ConsistencyCheckerIT.java
@@ -160,7 +160,7 @@
   public void patchSetRefMissing() throws Exception {
     ChangeNotes notes = insertChange();
     serverSideTestRepo.update(
-        "refs/other/foo", ObjectId.fromString(psUtil.current(db, notes).getRevision().get()));
+        "refs/other/foo", ObjectId.fromString(psUtil.current(notes).getRevision().get()));
     String refName = notes.getChange().currentPatchSetId().toRefName();
     deleteRef(refName);
 
@@ -170,7 +170,7 @@
   @Test
   public void patchSetRefMissingWithFix() throws Exception {
     ChangeNotes notes = insertChange();
-    String rev = psUtil.current(db, notes).getRevision().get();
+    String rev = psUtil.current(notes).getRevision().get();
     serverSideTestRepo.update("refs/other/foo", ObjectId.fromString(rev));
     String refName = notes.getChange().currentPatchSetId().toRefName();
     deleteRef(refName);
@@ -184,7 +184,7 @@
   @Test
   public void patchSetObjectAndRefMissingWithDeletingPatchSet() throws Exception {
     ChangeNotes notes = insertChange();
-    PatchSet ps1 = psUtil.current(db, notes);
+    PatchSet ps1 = psUtil.current(notes);
 
     String rev2 = "deadbeefdeadbeefdeadbeefdeadbeefdeadbeef";
     PatchSet ps2 = insertMissingPatchSet(notes, rev2);
@@ -200,20 +200,20 @@
 
     notes = reload(notes);
     assertThat(notes.getChange().currentPatchSetId().get()).isEqualTo(1);
-    assertThat(psUtil.get(db, notes, ps1.getId())).isNotNull();
-    assertThat(psUtil.get(db, notes, ps2.getId())).isNull();
+    assertThat(psUtil.get(notes, ps1.getId())).isNotNull();
+    assertThat(psUtil.get(notes, ps2.getId())).isNull();
   }
 
   @Test
   public void patchSetMultipleObjectsMissingWithDeletingPatchSets() throws Exception {
     ChangeNotes notes = insertChange();
-    PatchSet ps1 = psUtil.current(db, notes);
+    PatchSet ps1 = psUtil.current(notes);
 
     String rev2 = "deadbeefdeadbeefdeadbeefdeadbeefdeadbeef";
     PatchSet ps2 = insertMissingPatchSet(notes, rev2);
 
     notes = incrementPatchSet(reload(notes));
-    PatchSet ps3 = psUtil.current(db, notes);
+    PatchSet ps3 = psUtil.current(notes);
 
     String rev4 = "c0ffeeeec0ffeeeec0ffeeeec0ffeeeec0ffeeee";
     PatchSet ps4 = insertMissingPatchSet(notes, rev4);
@@ -231,10 +231,10 @@
 
     notes = reload(notes);
     assertThat(notes.getChange().currentPatchSetId().get()).isEqualTo(3);
-    assertThat(psUtil.get(db, notes, ps1.getId())).isNotNull();
-    assertThat(psUtil.get(db, notes, ps2.getId())).isNull();
-    assertThat(psUtil.get(db, notes, ps3.getId())).isNotNull();
-    assertThat(psUtil.get(db, notes, ps4.getId())).isNull();
+    assertThat(psUtil.get(notes, ps1.getId())).isNotNull();
+    assertThat(psUtil.get(notes, ps2.getId())).isNull();
+    assertThat(psUtil.get(notes, ps3.getId())).isNotNull();
+    assertThat(psUtil.get(notes, ps4.getId())).isNull();
   }
 
   @Test
@@ -245,10 +245,6 @@
     String rev = "deadbeefdeadbeefdeadbeefdeadbeefdeadbeef";
     PatchSet ps = newPatchSet(psId, rev, adminId);
 
-    if (notesMigration.changePrimaryStorage() == PrimaryStorage.REVIEW_DB) {
-      db.changes().insert(singleton(c));
-      db.patchSets().insert(singleton(ps));
-    }
     addNoteDbCommit(
         c.getId(),
         "Create change\n"
@@ -283,13 +279,13 @@
 
     notes = reload(notes);
     assertThat(notes.getChange().currentPatchSetId().get()).isEqualTo(1);
-    assertThat(psUtil.current(db, notes)).isNotNull();
+    assertThat(psUtil.current(notes)).isNotNull();
   }
 
   @Test
   public void duplicatePatchSetRevisions() throws Exception {
     ChangeNotes notes = insertChange();
-    PatchSet ps1 = psUtil.current(db, notes);
+    PatchSet ps1 = psUtil.current(notes);
     String rev = ps1.getRevision().get();
 
     notes =
@@ -332,7 +328,7 @@
     }
     notes = reload(notes);
 
-    String rev = psUtil.current(db, notes).getRevision().get();
+    String rev = psUtil.current(notes).getRevision().get();
     ObjectId tip = getDestRef(notes);
     assertProblems(
         notes,
@@ -349,7 +345,7 @@
   @Test
   public void newChangeIsMerged() throws Exception {
     ChangeNotes notes = insertChange();
-    String rev = psUtil.current(db, notes).getRevision().get();
+    String rev = psUtil.current(notes).getRevision().get();
     serverSideTestRepo
         .branch(notes.getChange().getDest().get())
         .update(serverSideTestRepo.getRevWalk().parseCommit(ObjectId.fromString(rev)));
@@ -369,7 +365,7 @@
   @Test
   public void newChangeIsMergedWithFix() throws Exception {
     ChangeNotes notes = insertChange();
-    String rev = psUtil.current(db, notes).getRevision().get();
+    String rev = psUtil.current(notes).getRevision().get();
     serverSideTestRepo
         .branch(notes.getChange().getDest().get())
         .update(serverSideTestRepo.getRevWalk().parseCommit(ObjectId.fromString(rev)));
@@ -395,7 +391,7 @@
   @Test
   public void extensionApiReturnsUpdatedValueAfterFix() throws Exception {
     ChangeNotes notes = insertChange();
-    String rev = psUtil.current(db, notes).getRevision().get();
+    String rev = psUtil.current(notes).getRevision().get();
     serverSideTestRepo
         .branch(notes.getChange().getDest().get())
         .update(serverSideTestRepo.getRevWalk().parseCommit(ObjectId.fromString(rev)));
@@ -410,7 +406,7 @@
   @Test
   public void expectedMergedCommitIsLatestPatchSet() throws Exception {
     ChangeNotes notes = insertChange();
-    String rev = psUtil.current(db, notes).getRevision().get();
+    String rev = psUtil.current(notes).getRevision().get();
     serverSideTestRepo
         .branch(notes.getChange().getDest().get())
         .update(serverSideTestRepo.getRevWalk().parseCommit(ObjectId.fromString(rev)));
@@ -438,7 +434,7 @@
   @Test
   public void expectedMergedCommitNotMergedIntoDestination() throws Exception {
     ChangeNotes notes = insertChange();
-    String rev = psUtil.current(db, notes).getRevision().get();
+    String rev = psUtil.current(notes).getRevision().get();
     RevCommit commit = serverSideTestRepo.getRevWalk().parseCommit(ObjectId.fromString(rev));
     serverSideTestRepo.branch(notes.getChange().getDest().get()).update(commit);
 
@@ -461,7 +457,7 @@
   public void createNewPatchSetForExpectedMergeCommitWithNoChangeId() throws Exception {
     ChangeNotes notes = insertChange();
     String dest = notes.getChange().getDest().get();
-    String rev = psUtil.current(db, notes).getRevision().get();
+    String rev = psUtil.current(notes).getRevision().get();
     RevCommit commit = serverSideTestRepo.getRevWalk().parseCommit(ObjectId.fromString(rev));
 
     RevCommit mergedAs =
@@ -493,7 +489,7 @@
     notes = reload(notes);
     PatchSet.Id psId2 = new PatchSet.Id(notes.getChangeId(), 2);
     assertThat(notes.getChange().currentPatchSetId()).isEqualTo(psId2);
-    assertThat(psUtil.get(db, notes, psId2).getRevision().get()).isEqualTo(mergedAs.name());
+    assertThat(psUtil.get(notes, psId2).getRevision().get()).isEqualTo(mergedAs.name());
 
     assertNoProblems(notes, null);
   }
@@ -502,7 +498,7 @@
   public void createNewPatchSetForExpectedMergeCommitWithChangeId() throws Exception {
     ChangeNotes notes = insertChange();
     String dest = notes.getChange().getDest().get();
-    String rev = psUtil.current(db, notes).getRevision().get();
+    String rev = psUtil.current(notes).getRevision().get();
     RevCommit commit = serverSideTestRepo.getRevWalk().parseCommit(ObjectId.fromString(rev));
 
     RevCommit mergedAs =
@@ -541,7 +537,7 @@
     notes = reload(notes);
     PatchSet.Id psId2 = new PatchSet.Id(notes.getChangeId(), 2);
     assertThat(notes.getChange().currentPatchSetId()).isEqualTo(psId2);
-    assertThat(psUtil.get(db, notes, psId2).getRevision().get()).isEqualTo(mergedAs.name());
+    assertThat(psUtil.get(notes, psId2).getRevision().get()).isEqualTo(mergedAs.name());
 
     assertNoProblems(notes, null);
   }
@@ -549,10 +545,10 @@
   @Test
   public void expectedMergedCommitIsOldPatchSetOfSameChange() throws Exception {
     ChangeNotes notes = insertChange();
-    PatchSet ps1 = psUtil.current(db, notes);
+    PatchSet ps1 = psUtil.current(notes);
     String rev1 = ps1.getRevision().get();
     notes = incrementPatchSet(notes);
-    PatchSet ps2 = psUtil.current(db, notes);
+    PatchSet ps2 = psUtil.current(notes);
     serverSideTestRepo
         .branch(notes.getChange().getDest().get())
         .update(serverSideTestRepo.getRevWalk().parseCommit(ObjectId.fromString(rev1)));
@@ -582,14 +578,14 @@
     PatchSet.Id psId3 = new PatchSet.Id(notes.getChangeId(), 3);
     assertThat(notes.getChange().currentPatchSetId()).isEqualTo(psId3);
     assertThat(notes.getChange().getStatus()).isEqualTo(Change.Status.MERGED);
-    assertThat(psUtil.byChangeAsMap(db, notes).keySet()).containsExactly(ps2.getId(), psId3);
-    assertThat(psUtil.get(db, notes, psId3).getRevision().get()).isEqualTo(rev1);
+    assertThat(psUtil.byChangeAsMap(notes).keySet()).containsExactly(ps2.getId(), psId3);
+    assertThat(psUtil.get(notes, psId3).getRevision().get()).isEqualTo(rev1);
   }
 
   @Test
   public void expectedMergedCommitIsDanglingPatchSetOlderThanCurrent() throws Exception {
     ChangeNotes notes = insertChange();
-    PatchSet ps1 = psUtil.current(db, notes);
+    PatchSet ps1 = psUtil.current(notes);
 
     // Create dangling ref so next ID in the database becomes 3.
     PatchSet.Id psId2 = new PatchSet.Id(notes.getChangeId(), 2);
@@ -598,7 +594,7 @@
     serverSideTestRepo.branch(psId2.toRefName()).update(commit2);
 
     notes = incrementPatchSet(notes);
-    PatchSet ps3 = psUtil.current(db, notes);
+    PatchSet ps3 = psUtil.current(notes);
     assertThat(ps3.getId().get()).isEqualTo(3);
 
     serverSideTestRepo
@@ -630,15 +626,15 @@
     PatchSet.Id psId4 = new PatchSet.Id(notes.getChangeId(), 4);
     assertThat(notes.getChange().currentPatchSetId()).isEqualTo(psId4);
     assertThat(notes.getChange().getStatus()).isEqualTo(Change.Status.MERGED);
-    assertThat(psUtil.byChangeAsMap(db, notes).keySet())
+    assertThat(psUtil.byChangeAsMap(notes).keySet())
         .containsExactly(ps1.getId(), ps3.getId(), psId4);
-    assertThat(psUtil.get(db, notes, psId4).getRevision().get()).isEqualTo(rev2);
+    assertThat(psUtil.get(notes, psId4).getRevision().get()).isEqualTo(rev2);
   }
 
   @Test
   public void expectedMergedCommitIsDanglingPatchSetNewerThanCurrent() throws Exception {
     ChangeNotes notes = insertChange();
-    PatchSet ps1 = psUtil.current(db, notes);
+    PatchSet ps1 = psUtil.current(notes);
 
     // Create dangling ref with no patch set.
     PatchSet.Id psId2 = new PatchSet.Id(notes.getChangeId(), 2);
@@ -667,8 +663,8 @@
     notes = reload(notes);
     assertThat(notes.getChange().currentPatchSetId()).isEqualTo(psId2);
     assertThat(notes.getChange().getStatus()).isEqualTo(Change.Status.MERGED);
-    assertThat(psUtil.byChangeAsMap(db, notes).keySet()).containsExactly(ps1.getId(), psId2);
-    assertThat(psUtil.get(db, notes, psId2).getRevision().get()).isEqualTo(rev2);
+    assertThat(psUtil.byChangeAsMap(notes).keySet()).containsExactly(ps1.getId(), psId2);
+    assertThat(psUtil.get(notes, psId2).getRevision().get()).isEqualTo(rev2);
   }
 
   @Test
@@ -676,7 +672,7 @@
     ChangeNotes notes = insertChange();
     String dest = notes.getChange().getDest().get();
     RevCommit parent = serverSideTestRepo.branch(dest).commit().message("parent").create();
-    String rev = psUtil.current(db, notes).getRevision().get();
+    String rev = psUtil.current(notes).getRevision().get();
     RevCommit commit = serverSideTestRepo.getRevWalk().parseCommit(ObjectId.fromString(rev));
     serverSideTestRepo.branch(dest).update(commit);
 
@@ -710,19 +706,19 @@
   @Test
   public void expectedMergedCommitMatchesMultiplePatchSets() throws Exception {
     ChangeNotes notes1 = insertChange();
-    PatchSet.Id psId1 = psUtil.current(db, notes1).getId();
+    PatchSet.Id psId1 = psUtil.current(notes1).getId();
     String dest = notes1.getChange().getDest().get();
-    String rev = psUtil.current(db, notes1).getRevision().get();
+    String rev = psUtil.current(notes1).getRevision().get();
     RevCommit commit = serverSideTestRepo.getRevWalk().parseCommit(ObjectId.fromString(rev));
     serverSideTestRepo.branch(dest).update(commit);
 
     ChangeNotes notes2 = insertChange();
     notes2 = incrementPatchSet(notes2, commit);
-    PatchSet.Id psId2 = psUtil.current(db, notes2).getId();
+    PatchSet.Id psId2 = psUtil.current(notes2).getId();
 
     ChangeNotes notes3 = insertChange();
     notes3 = incrementPatchSet(notes3, commit);
-    PatchSet.Id psId3 = psUtil.current(db, notes3).getId();
+    PatchSet.Id psId3 = psUtil.current(notes3).getId();
 
     FixInput fix = new FixInput();
     fix.expectMergedAs = commit.name();
@@ -867,7 +863,7 @@
 
   private ChangeNotes mergeChange(ChangeNotes notes) throws Exception {
     final ObjectId oldId = getDestRef(notes);
-    final ObjectId newId = ObjectId.fromString(psUtil.current(db, notes).getRevision().get());
+    final ObjectId newId = ObjectId.fromString(psUtil.current(notes).getRevision().get());
     final String dest = notes.getChange().getDest().get();
 
     try (BatchUpdate bu = newUpdate(adminId)) {
diff --git a/javatests/com/google/gerrit/acceptance/server/change/GetRelatedIT.java b/javatests/com/google/gerrit/acceptance/server/change/GetRelatedIT.java
index 8e8aeac..40afa8a 100644
--- a/javatests/com/google/gerrit/acceptance/server/change/GetRelatedIT.java
+++ b/javatests/com/google/gerrit/acceptance/server/change/GetRelatedIT.java
@@ -572,7 +572,7 @@
 
     ChangeData cd = getChange(last);
     assertThat(cd.patchSets()).hasSize(n);
-    assertThat(GetRelated.getAllGroups(cd.notes(), db, psUtil)).hasSize(n);
+    assertThat(GetRelated.getAllGroups(cd.notes(), psUtil)).hasSize(n);
 
     assertRelated(cd.change().currentPatchSetId());
   }
@@ -610,8 +610,8 @@
           new BatchUpdateOp() {
             @Override
             public boolean updateChange(ChangeContext ctx) throws OrmException {
-              PatchSet ps = psUtil.get(ctx.getDb(), ctx.getNotes(), psId);
-              psUtil.setGroups(ctx.getDb(), ctx.getUpdate(psId), ps, ImmutableList.<String>of());
+              PatchSet ps = psUtil.get(ctx.getNotes(), psId);
+              psUtil.setGroups(ctx.getUpdate(psId), ps, ImmutableList.<String>of());
               ctx.dontBumpLastUpdatedOn();
               return true;
             }
@@ -622,7 +622,8 @@
 
   private void assertRelated(PatchSet.Id psId, RelatedChangeAndCommitInfo... expected)
       throws Exception {
-    List<RelatedChangeAndCommitInfo> actual = getRelated(psId);
+    List<RelatedChangeAndCommitInfo> actual =
+        gApi.changes().id(psId.getParentKey().get()).revision(psId.get()).related().changes;
     assertThat(actual).named("related to " + psId).hasSize(expected.length);
     for (int i = 0; i < actual.size(); i++) {
       String name = "index " + i + " related to " + psId;
diff --git a/javatests/com/google/gerrit/acceptance/server/mail/ChangeNotificationsIT.java b/javatests/com/google/gerrit/acceptance/server/mail/ChangeNotificationsIT.java
index 209d0a2..35d9e88 100644
--- a/javatests/com/google/gerrit/acceptance/server/mail/ChangeNotificationsIT.java
+++ b/javatests/com/google/gerrit/acceptance/server/mail/ChangeNotificationsIT.java
@@ -14,7 +14,6 @@
 
 package com.google.gerrit.acceptance.server.mail;
 
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.extensions.api.changes.NotifyHandling.ALL;
 import static com.google.gerrit.extensions.api.changes.NotifyHandling.NONE;
 import static com.google.gerrit.extensions.api.changes.NotifyHandling.OWNER;
@@ -255,31 +254,7 @@
    * AddReviewerSender tests.
    */
 
-  private void addReviewerToReviewableChangeInReviewDb(Adder adder) throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    TestAccount reviewer = accountCreator.create("added", "added@example.com", "added");
-    addReviewer(adder, sc.changeId, sc.owner, reviewer.email);
-    assertThat(sender)
-        .sent("newchange", sc)
-        .to(reviewer)
-        .cc(sc.reviewer, sc.ccer)
-        .cc(sc.reviewerByEmail, sc.ccerByEmail)
-        .noOneElse();
-  }
-
-  @Test
-  public void addReviewerToReviewableChangeInReviewDbSingly() throws Exception {
-    addReviewerToReviewableChangeInReviewDb(singly());
-  }
-
-  @Test
-  public void addReviewerToReviewableChangeInReviewDbBatch() throws Exception {
-    addReviewerToReviewableChangeInReviewDb(batch());
-  }
-
-  private void addReviewerToReviewableChangeInNoteDb(Adder adder) throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  private void addReviewerToReviewableChange(Adder adder) throws Exception {
     StagedChange sc = stageReviewableChange();
     TestAccount reviewer = accountCreator.create("added", "added@example.com", "added");
     addReviewer(adder, sc.changeId, sc.owner, reviewer.email);
@@ -293,17 +268,16 @@
   }
 
   @Test
-  public void addReviewerToReviewableChangeInNoteDbSingly() throws Exception {
-    addReviewerToReviewableChangeInNoteDb(singly());
+  public void addReviewerToReviewableChangeSingly() throws Exception {
+    addReviewerToReviewableChange(singly());
   }
 
   @Test
-  public void addReviewerToReviewableChangeInNoteDbBatch() throws Exception {
-    addReviewerToReviewableChangeInNoteDb(batch());
+  public void addReviewerToReviewableChangeBatch() throws Exception {
+    addReviewerToReviewableChange(batch());
   }
 
-  private void addReviewerToReviewableChangeByOwnerCcingSelfInNoteDb(Adder adder) throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  private void addReviewerToReviewableChangeByOwnerCcingSelf(Adder adder) throws Exception {
     StagedChange sc = stageReviewableChange();
     TestAccount reviewer = accountCreator.create("added", "added@example.com", "added");
     addReviewer(adder, sc.changeId, sc.owner, reviewer.email, CC_ON_OWN_COMMENTS, null);
@@ -317,17 +291,16 @@
   }
 
   @Test
-  public void addReviewerToReviewableChangeByOwnerCcingSelfInNoteDbSingly() throws Exception {
-    addReviewerToReviewableChangeByOwnerCcingSelfInNoteDb(singly());
+  public void addReviewerToReviewableChangeByOwnerCcingSelfSingly() throws Exception {
+    addReviewerToReviewableChangeByOwnerCcingSelf(singly());
   }
 
   @Test
-  public void addReviewerToReviewableChangeByOwnerCcingSelfInNoteDbBatch() throws Exception {
-    addReviewerToReviewableChangeByOwnerCcingSelfInNoteDb(batch());
+  public void addReviewerToReviewableChangeByOwnerCcingSelfBatch() throws Exception {
+    addReviewerToReviewableChangeByOwnerCcingSelf(batch());
   }
 
-  private void addReviewerToReviewableChangeByOtherInNoteDb(Adder adder) throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  private void addReviewerToReviewableChangeByOther(Adder adder) throws Exception {
     TestAccount other = accountCreator.create("other", "other@example.com", "other");
     StagedChange sc = stageReviewableChange();
     TestAccount reviewer = accountCreator.create("added", "added@example.com", "added");
@@ -342,17 +315,16 @@
   }
 
   @Test
-  public void addReviewerToReviewableChangeByOtherInNoteDbSingly() throws Exception {
-    addReviewerToReviewableChangeByOtherInNoteDb(singly());
+  public void addReviewerToReviewableChangeByOtherSingly() throws Exception {
+    addReviewerToReviewableChangeByOther(singly());
   }
 
   @Test
-  public void addReviewerToReviewableChangeByOtherInNoteDbBatch() throws Exception {
-    addReviewerToReviewableChangeByOtherInNoteDb(batch());
+  public void addReviewerToReviewableChangeByOtherBatch() throws Exception {
+    addReviewerToReviewableChangeByOther(batch());
   }
 
-  private void addReviewerToReviewableChangeByOtherCcingSelfInNoteDb(Adder adder) throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  private void addReviewerToReviewableChangeByOtherCcingSelf(Adder adder) throws Exception {
     TestAccount other = accountCreator.create("other", "other@example.com", "other");
     StagedChange sc = stageReviewableChange();
     TestAccount reviewer = accountCreator.create("added", "added@example.com", "added");
@@ -367,35 +339,16 @@
   }
 
   @Test
-  public void addReviewerToReviewableChangeByOtherCcingSelfInNoteDbSingly() throws Exception {
-    addReviewerToReviewableChangeByOtherCcingSelfInNoteDb(singly());
+  public void addReviewerToReviewableChangeByOtherCcingSelfSingly() throws Exception {
+    addReviewerToReviewableChangeByOtherCcingSelf(singly());
   }
 
   @Test
-  public void addReviewerToReviewableChangeByOtherCcingSelfInNoteDbBatch() throws Exception {
-    addReviewerToReviewableChangeByOtherCcingSelfInNoteDb(batch());
+  public void addReviewerToReviewableChangeByOtherCcingSelfBatch() throws Exception {
+    addReviewerToReviewableChangeByOtherCcingSelf(batch());
   }
 
-  private void addReviewerByEmailToReviewableChangeInReviewDb(Adder adder) throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    String email = "addedbyemail@example.com";
-    StagedChange sc = stageReviewableChange();
-    addReviewer(adder, sc.changeId, sc.owner, email);
-    assertThat(sender).notSent();
-  }
-
-  @Test
-  public void addReviewerByEmailToReviewableChangeInReviewDbSingly() throws Exception {
-    addReviewerByEmailToReviewableChangeInReviewDb(singly());
-  }
-
-  @Test
-  public void addReviewerByEmailToReviewableChangeInReviewDbBatch() throws Exception {
-    addReviewerByEmailToReviewableChangeInReviewDb(batch());
-  }
-
-  private void addReviewerByEmailToReviewableChangeInNoteDb(Adder adder) throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  private void addReviewerByEmailToReviewableChange(Adder adder) throws Exception {
     String email = "addedbyemail@example.com";
     StagedChange sc = stageReviewableChange();
     addReviewer(adder, sc.changeId, sc.owner, email);
@@ -409,13 +362,13 @@
   }
 
   @Test
-  public void addReviewerByEmailToReviewableChangeInNoteDbSingly() throws Exception {
-    addReviewerByEmailToReviewableChangeInNoteDb(singly());
+  public void addReviewerByEmailToReviewableChangeSingly() throws Exception {
+    addReviewerByEmailToReviewableChange(singly());
   }
 
   @Test
-  public void addReviewerByEmailToReviewableChangeInNoteDbBatch() throws Exception {
-    addReviewerByEmailToReviewableChangeInNoteDb(batch());
+  public void addReviewerByEmailToReviewableChangeBatch() throws Exception {
+    addReviewerByEmailToReviewableChange(batch());
   }
 
   private void addReviewerToWipChange(Adder adder) throws Exception {
@@ -452,8 +405,7 @@
     addReviewerToReviewableWipChange(batch());
   }
 
-  private void addReviewerToWipChangeInNoteDbNotifyAll(Adder adder) throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  private void addReviewerToWipChangeNotifyAll(Adder adder) throws Exception {
     StagedChange sc = stageWipChange();
     TestAccount reviewer = accountCreator.create("added", "added@example.com", "added");
     addReviewer(adder, sc.changeId, sc.owner, reviewer.email, NotifyHandling.ALL);
@@ -467,41 +419,16 @@
   }
 
   @Test
-  public void addReviewerToWipChangeInNoteDbNotifyAllSingly() throws Exception {
-    addReviewerToWipChangeInNoteDbNotifyAll(singly());
+  public void addReviewerToWipChangeNotifyAllSingly() throws Exception {
+    addReviewerToWipChangeNotifyAll(singly());
   }
 
   @Test
-  public void addReviewerToWipChangeInNoteDbNotifyAllBatch() throws Exception {
-    addReviewerToWipChangeInNoteDbNotifyAll(batch());
+  public void addReviewerToWipChangeNotifyAllBatch() throws Exception {
+    addReviewerToWipChangeNotifyAll(batch());
   }
 
-  private void addReviewerToWipChangeInReviewDbNotifyAll(Adder adder) throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageWipChange();
-    TestAccount reviewer = accountCreator.create("added", "added@example.com", "added");
-    addReviewer(adder, sc.changeId, sc.owner, reviewer.email, NotifyHandling.ALL);
-    assertThat(sender)
-        .sent("newchange", sc)
-        .to(reviewer)
-        .cc(sc.reviewer, sc.ccer)
-        .cc(sc.reviewerByEmail, sc.ccerByEmail)
-        .noOneElse();
-  }
-
-  @Test
-  public void addReviewerToWipChangeInReviewDbNotifyAllSingly() throws Exception {
-    addReviewerToWipChangeInReviewDbNotifyAll(singly());
-  }
-
-  @Test
-  public void addReviewerToWipChangeInReviewDbNotifyAllBatch() throws Exception {
-    addReviewerToWipChangeInReviewDbNotifyAll(batch());
-  }
-
-  private void addReviewerToReviewableChangeInNoteDbNotifyOwnerReviewers(Adder adder)
-      throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  private void addReviewerToReviewableChangeNotifyOwnerReviewers(Adder adder) throws Exception {
     StagedChange sc = stageReviewableChange();
     TestAccount reviewer = accountCreator.create("added", "added@example.com", "added");
     addReviewer(adder, sc.changeId, sc.owner, reviewer.email, OWNER_REVIEWERS);
@@ -515,18 +442,17 @@
   }
 
   @Test
-  public void addReviewerToReviewableChangeInNoteDbNotifyOwnerReviewersSingly() throws Exception {
-    addReviewerToReviewableChangeInNoteDbNotifyOwnerReviewers(singly());
+  public void addReviewerToReviewableChangeNotifyOwnerReviewersSingly() throws Exception {
+    addReviewerToReviewableChangeNotifyOwnerReviewers(singly());
   }
 
   @Test
-  public void addReviewerToReviewableChangeInNoteDbNotifyOwnerReviewersBatch() throws Exception {
-    addReviewerToReviewableChangeInNoteDbNotifyOwnerReviewers(batch());
+  public void addReviewerToReviewableChangeNotifyOwnerReviewersBatch() throws Exception {
+    addReviewerToReviewableChangeNotifyOwnerReviewers(batch());
   }
 
-  private void addReviewerToReviewableChangeInNoteDbByOwnerCcingSelfNotifyOwner(Adder adder)
+  private void addReviewerToReviewableChangeByOwnerCcingSelfNotifyOwner(Adder adder)
       throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     StagedChange sc = stageReviewableChange();
     TestAccount reviewer = accountCreator.create("added", "added@example.com", "added");
     addReviewer(adder, sc.changeId, sc.owner, reviewer.email, CC_ON_OWN_COMMENTS, OWNER);
@@ -534,20 +460,17 @@
   }
 
   @Test
-  public void addReviewerToReviewableChangeInNoteDbByOwnerCcingSelfNotifyOwnerSingly()
-      throws Exception {
-    addReviewerToReviewableChangeInNoteDbByOwnerCcingSelfNotifyOwner(singly());
+  public void addReviewerToReviewableChangeByOwnerCcingSelfNotifyOwnerSingly() throws Exception {
+    addReviewerToReviewableChangeByOwnerCcingSelfNotifyOwner(singly());
   }
 
   @Test
-  public void addReviewerToReviewableChangeInNoteDbByOwnerCcingSelfNotifyOwnerBatch()
-      throws Exception {
-    addReviewerToReviewableChangeInNoteDbByOwnerCcingSelfNotifyOwner(batch());
+  public void addReviewerToReviewableChangeByOwnerCcingSelfNotifyOwnerBatch() throws Exception {
+    addReviewerToReviewableChangeByOwnerCcingSelfNotifyOwner(batch());
   }
 
-  private void addReviewerToReviewableChangeInNoteDbByOwnerCcingSelfNotifyNone(Adder adder)
+  private void addReviewerToReviewableChangeByOwnerCcingSelfNotifyNone(Adder adder)
       throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     StagedChange sc = stageReviewableChange();
     TestAccount reviewer = accountCreator.create("added", "added@example.com", "added");
     addReviewer(adder, sc.changeId, sc.owner, reviewer.email, CC_ON_OWN_COMMENTS, NONE);
@@ -555,19 +478,16 @@
   }
 
   @Test
-  public void addReviewerToReviewableChangeInNoteDbByOwnerCcingSelfNotifyNoneSingly()
-      throws Exception {
-    addReviewerToReviewableChangeInNoteDbByOwnerCcingSelfNotifyNone(singly());
+  public void addReviewerToReviewableChangeByOwnerCcingSelfNotifyNoneSingly() throws Exception {
+    addReviewerToReviewableChangeByOwnerCcingSelfNotifyNone(singly());
   }
 
   @Test
-  public void addReviewerToReviewableChangeInNoteDbByOwnerCcingSelfNotifyNoneBatch()
-      throws Exception {
-    addReviewerToReviewableChangeInNoteDbByOwnerCcingSelfNotifyNone(batch());
+  public void addReviewerToReviewableChangeByOwnerCcingSelfNotifyNoneBatch() throws Exception {
+    addReviewerToReviewableChangeByOwnerCcingSelfNotifyNone(batch());
   }
 
-  private void addNonUserReviewerByEmailInNoteDb(Adder adder) throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  private void addNonUserReviewerByEmail(Adder adder) throws Exception {
     StagedChange sc = stageReviewableChange();
     addReviewer(adder, sc.changeId, sc.owner, "nonexistent@example.com");
     assertThat(sender)
@@ -579,17 +499,16 @@
   }
 
   @Test
-  public void addNonUserReviewerByEmailInNoteDbSingly() throws Exception {
-    addNonUserReviewerByEmailInNoteDb(singly(ReviewerState.REVIEWER));
+  public void addNonUserReviewerByEmailSingly() throws Exception {
+    addNonUserReviewerByEmail(singly(ReviewerState.REVIEWER));
   }
 
   @Test
-  public void addNonUserReviewerByEmailInNoteDbBatch() throws Exception {
-    addNonUserReviewerByEmailInNoteDb(batch(ReviewerState.REVIEWER));
+  public void addNonUserReviewerByEmailBatch() throws Exception {
+    addNonUserReviewerByEmail(batch(ReviewerState.REVIEWER));
   }
 
-  private void addNonUserCcByEmailInNoteDb(Adder adder) throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  private void addNonUserCcByEmail(Adder adder) throws Exception {
     StagedChange sc = stageReviewableChange();
     addReviewer(adder, sc.changeId, sc.owner, "nonexistent@example.com");
     assertThat(sender)
@@ -601,13 +520,13 @@
   }
 
   @Test
-  public void addNonUserCcByEmailInNoteDbSingly() throws Exception {
-    addNonUserCcByEmailInNoteDb(singly(ReviewerState.CC));
+  public void addNonUserCcByEmailSingly() throws Exception {
+    addNonUserCcByEmail(singly(ReviewerState.CC));
   }
 
   @Test
-  public void addNonUserCcByEmailInNoteDbBatch() throws Exception {
-    addNonUserCcByEmailInNoteDb(batch(ReviewerState.CC));
+  public void addNonUserCcByEmailBatch() throws Exception {
+    addNonUserCcByEmail(batch(ReviewerState.CC));
   }
 
   private interface Adder {
@@ -923,8 +842,7 @@
   }
 
   @Test
-  public void addReviewerOnWipChangeAndStartReviewInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void addReviewerOnWipChangeAndStartReview() throws Exception {
     StagedChange sc = stageWipChange();
     ReviewInput in = ReviewInput.noScore().reviewer(other.email).setWorkInProgress(false);
     gApi.changes().id(sc.changeId).revision("current").review(in);
@@ -946,28 +864,6 @@
   }
 
   @Test
-  public void addReviewerOnWipChangeAndStartReviewInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageWipChange();
-    ReviewInput in = ReviewInput.noScore().reviewer(other.email).setWorkInProgress(false);
-    gApi.changes().id(sc.changeId).revision("current").review(in);
-    assertThat(sender)
-        .sent("comment", sc)
-        .cc(sc.reviewer, sc.ccer, other)
-        .cc(sc.reviewerByEmail, sc.ccerByEmail)
-        .bcc(sc.starrer)
-        .bcc(ALL_COMMENTS)
-        .noOneElse();
-    assertThat(sender)
-        .sent("newchange", sc)
-        .to(other)
-        .cc(sc.reviewer, sc.ccer)
-        .cc(sc.reviewerByEmail, sc.ccerByEmail)
-        .noOneElse();
-    assertThat(sender).notSent();
-  }
-
-  @Test
   public void startReviewMessageNotRepeated() throws Exception {
     // TODO(logan): Remove this test check once PolyGerrit workaround is rolled back.
     StagedChange sc = stageWipChange();
@@ -1094,18 +990,12 @@
             users -> ImmutableList.of("r=" + users.reviewer.username, "cc=" + users.ccer.username));
     FakeEmailSenderSubject subject =
         assertThat(sender).sent("newchange", spc).to(spc.reviewer, spc.watchingProjectOwner);
-    if (notesMigration.readChanges()) {
-      subject.cc(spc.ccer);
-    } else {
-      // CCs are considered reviewers in the storage layer.
-      subject.to(spc.ccer);
-    }
+    subject.cc(spc.ccer);
     subject.bcc(NEW_CHANGES, NEW_PATCHSETS).noOneElse();
   }
 
   @Test
-  public void createReviewableChangeWithReviewersAndCcsByEmailInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void createReviewableChangeWithReviewersAndCcsByEmail() throws Exception {
     StagedPreChange spc =
         stagePreChange(
             "refs/for/master",
@@ -1290,8 +1180,7 @@
   }
 
   @Test
-  public void deleteReviewerByEmailFromWipChangeInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void deleteReviewerByEmailFromWipChange() throws Exception {
     StagedChange sc = stageWipChangeWithExtraReviewer();
     gApi.changes().id(sc.changeId).reviewer(sc.reviewerByEmail).remove();
     assertThat(sender).notSent();
@@ -1650,8 +1539,7 @@
    */
 
   @Test
-  public void newPatchSetByOwnerOnReviewableChangeInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void newPatchSetByOwnerOnReviewableChange() throws Exception {
     StagedChange sc = stageReviewableChange();
     pushTo(sc, "refs/for/master", sc.owner);
     assertThat(sender)
@@ -1665,21 +1553,7 @@
   }
 
   @Test
-  public void newPatchSetByOwnerOnReviewableChangeInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    pushTo(sc, "refs/for/master", sc.owner);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .to(sc.reviewer, sc.ccer)
-        .bcc(sc.starrer)
-        .bcc(NEW_PATCHSETS)
-        .noOneElse();
-  }
-
-  @Test
-  public void newPatchSetByOtherOnReviewableChangeInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void newPatchSetByOtherOnReviewableChange() throws Exception {
     StagedChange sc = stageReviewableChange();
     pushTo(sc, "refs/for/master", other);
     assertThat(sender)
@@ -1694,22 +1568,7 @@
   }
 
   @Test
-  public void newPatchSetByOtherOnReviewableChangeInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    pushTo(sc, "refs/for/master", other);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .notTo(sc.owner) // TODO(logan): This email shouldn't come from the owner.
-        .to(sc.reviewer, sc.ccer, other)
-        .bcc(sc.starrer)
-        .bcc(NEW_PATCHSETS)
-        .noOneElse();
-  }
-
-  @Test
-  public void newPatchSetByOtherOnReviewableChangeOwnerSelfCcInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void newPatchSetByOtherOnReviewableChangeOwnerSelfCc() throws Exception {
     StagedChange sc = stageReviewableChange();
     pushTo(sc, "refs/for/master", other, EmailStrategy.CC_ON_OWN_COMMENTS);
     assertThat(sender)
@@ -1724,22 +1583,7 @@
   }
 
   @Test
-  public void newPatchSetByOtherOnReviewableChangeOwnerSelfCcInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    pushTo(sc, "refs/for/master", other, EmailStrategy.CC_ON_OWN_COMMENTS);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .notTo(sc.owner) // TODO(logan): This shouldn't be sent *from* the owner.
-        .to(sc.reviewer, sc.ccer, other)
-        .bcc(sc.starrer)
-        .bcc(NEW_PATCHSETS)
-        .noOneElse();
-  }
-
-  @Test
-  public void newPatchSetByOtherOnReviewableChangeNotifyOwnerReviewersInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void newPatchSetByOtherOnReviewableChangeNotifyOwnerReviewers() throws Exception {
     StagedChange sc = stageReviewableChange();
     pushTo(sc, "refs/for/master%notify=OWNER_REVIEWERS", other);
     assertThat(sender)
@@ -1753,23 +1597,8 @@
   }
 
   @Test
-  public void newPatchSetByOtherOnReviewableChangeNotifyOwnerReviewersInReviewDb()
+  public void newPatchSetByOtherOnReviewableChangeOwnerSelfCcNotifyOwnerReviewers()
       throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    pushTo(sc, "refs/for/master%notify=OWNER_REVIEWERS", other);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .notTo(sc.owner) // TODO(logan): This shouldn't be sent *from* the owner.
-        .to(sc.reviewer, sc.ccer)
-        .to(other)
-        .noOneElse();
-  }
-
-  @Test
-  public void newPatchSetByOtherOnReviewableChangeOwnerSelfCcNotifyOwnerReviewersInNoteDb()
-      throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     StagedChange sc = stageReviewableChange();
     pushTo(sc, "refs/for/master%notify=OWNER_REVIEWERS", other, EmailStrategy.CC_ON_OWN_COMMENTS);
     assertThat(sender)
@@ -1783,20 +1612,6 @@
   }
 
   @Test
-  public void newPatchSetByOtherOnReviewableChangeOwnerSelfCcNotifyOwnerReviewersInReviewDb()
-      throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    pushTo(sc, "refs/for/master%notify=OWNER_REVIEWERS", other, EmailStrategy.CC_ON_OWN_COMMENTS);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .to(sc.reviewer, sc.ccer)
-        .to(other)
-        .notTo(sc.owner) // TODO(logan): This shouldn't be sent *from* the owner.
-        .noOneElse();
-  }
-
-  @Test
   public void newPatchSetByOtherOnReviewableChangeNotifyOwner() throws Exception {
     StagedChange sc = stageReviewableChange();
     pushTo(sc, "refs/for/master%notify=OWNER", other);
@@ -1843,8 +1658,7 @@
   }
 
   @Test
-  public void newPatchSetOnWipChangeNotifyAllInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void newPatchSetOnWipChangeNotifyAll() throws Exception {
     StagedChange sc = stageWipChange();
     pushTo(sc, "refs/for/master%wip,notify=ALL", sc.owner);
     assertThat(sender)
@@ -1858,21 +1672,7 @@
   }
 
   @Test
-  public void newPatchSetOnWipChangeNotifyAllInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageWipChange();
-    pushTo(sc, "refs/for/master%wip,notify=ALL", sc.owner);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .to(sc.reviewer, sc.ccer)
-        .bcc(sc.starrer)
-        .bcc(NEW_PATCHSETS)
-        .noOneElse();
-  }
-
-  @Test
-  public void newPatchSetOnWipChangeToReadyInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void newPatchSetOnWipChangeToReady() throws Exception {
     StagedChange sc = stageWipChange();
     pushTo(sc, "refs/for/master%ready", sc.owner);
     assertThat(sender)
@@ -1886,19 +1686,6 @@
   }
 
   @Test
-  public void newPatchSetOnWipChangeToReadyInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageWipChange();
-    pushTo(sc, "refs/for/master%ready", sc.owner);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .to(sc.reviewer, sc.ccer)
-        .bcc(sc.starrer)
-        .bcc(NEW_PATCHSETS)
-        .noOneElse();
-  }
-
-  @Test
   public void newPatchSetOnReviewableWipChange() throws Exception {
     StagedChange sc = stageReviewableWipChange();
     pushTo(sc, "refs/for/master%wip", sc.owner);
@@ -1906,8 +1693,7 @@
   }
 
   @Test
-  public void newPatchSetOnReviewableChangeAddingReviewerInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void newPatchSetOnReviewableChangeAddingReviewer() throws Exception {
     StagedChange sc = stageReviewableChange();
     TestAccount newReviewer = sc.testAccount("newReviewer");
     pushTo(sc, "refs/for/master%r=" + newReviewer.username, sc.owner);
@@ -1923,22 +1709,6 @@
   }
 
   @Test
-  public void newPatchSetOnReviewableChangeAddingReviewerInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    TestAccount newReviewer = sc.testAccount("newReviewer");
-    pushTo(sc, "refs/for/master%r=" + newReviewer.username, sc.owner);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .to(sc.reviewer, sc.ccer, newReviewer)
-        .cc(sc.reviewerByEmail, sc.ccerByEmail)
-        .bcc(sc.starrer)
-        .bcc(NEW_PATCHSETS)
-        .noOneElse();
-    assertThat(sender).notSent();
-  }
-
-  @Test
   public void newPatchSetOnWipChangeAddingReviewer() throws Exception {
     StagedChange sc = stageWipChange();
     TestAccount newReviewer = sc.testAccount("newReviewer");
@@ -1947,8 +1717,7 @@
   }
 
   @Test
-  public void newPatchSetOnWipChangeAddingReviewerNotifyAllInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void newPatchSetOnWipChangeAddingReviewerNotifyAll() throws Exception {
     StagedChange sc = stageWipChange();
     TestAccount newReviewer = sc.testAccount("newReviewer");
     pushTo(sc, "refs/for/master%notify=ALL,r=" + newReviewer.username, sc.owner);
@@ -1964,24 +1733,7 @@
   }
 
   @Test
-  public void newPatchSetOnWipChangeAddingReviewerNotifyAllInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageWipChange();
-    TestAccount newReviewer = sc.testAccount("newReviewer");
-    pushTo(sc, "refs/for/master%notify=ALL,r=" + newReviewer.username, sc.owner);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .to(sc.reviewer, sc.ccer, newReviewer)
-        .cc(sc.reviewerByEmail, sc.ccerByEmail)
-        .bcc(sc.starrer)
-        .bcc(NEW_PATCHSETS)
-        .noOneElse();
-    assertThat(sender).notSent();
-  }
-
-  @Test
-  public void newPatchSetOnWipChangeSettingReadyInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void newPatchSetOnWipChangeSettingReady() throws Exception {
     StagedChange sc = stageWipChange();
     pushTo(sc, "refs/for/master%ready", sc.owner);
     assertThat(sender)
@@ -1995,21 +1747,6 @@
     assertThat(sender).notSent();
   }
 
-  @Test
-  public void newPatchSetOnWipChangeSettingReadyInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageWipChange();
-    pushTo(sc, "refs/for/master%ready", sc.owner);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .to(sc.reviewer, sc.ccer)
-        .cc(sc.reviewerByEmail, sc.ccerByEmail)
-        .bcc(sc.starrer)
-        .bcc(NEW_PATCHSETS)
-        .noOneElse();
-    assertThat(sender).notSent();
-  }
-
   private void pushTo(StagedChange sc, String ref, TestAccount by) throws Exception {
     pushTo(sc, ref, by, ENABLED);
   }
@@ -2021,8 +1758,7 @@
   }
 
   @Test
-  public void editCommitMessageEditByOwnerOnReviewableChangeInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void editCommitMessageEditByOwnerOnReviewableChange() throws Exception {
     StagedChange sc = stageReviewableChange();
     editCommitMessage(sc, sc.owner);
     assertThat(sender)
@@ -2036,21 +1772,7 @@
   }
 
   @Test
-  public void editCommitMessageEditByOwnerOnReviewableChangeInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    editCommitMessage(sc, sc.owner);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .to(sc.reviewer, sc.ccer)
-        .bcc(sc.starrer)
-        .bcc(NEW_PATCHSETS)
-        .noOneElse();
-  }
-
-  @Test
-  public void editCommitMessageEditByOtherOnReviewableChangeInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void editCommitMessageEditByOtherOnReviewableChange() throws Exception {
     StagedChange sc = stageReviewableChange();
     editCommitMessage(sc, other);
     assertThat(sender)
@@ -2064,21 +1786,7 @@
   }
 
   @Test
-  public void editCommitMessageEditByOtherOnReviewableChangeInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    editCommitMessage(sc, other);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .to(sc.owner, sc.reviewer, sc.ccer)
-        .bcc(sc.starrer)
-        .bcc(NEW_PATCHSETS)
-        .noOneElse();
-  }
-
-  @Test
-  public void editCommitMessageByOtherOnReviewableChangeOwnerSelfCcInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void editCommitMessageByOtherOnReviewableChangeOwnerSelfCc() throws Exception {
     StagedChange sc = stageReviewableChange();
     editCommitMessage(sc, other, CC_ON_OWN_COMMENTS);
     assertThat(sender)
@@ -2092,22 +1800,7 @@
   }
 
   @Test
-  public void editCommitMessageByOtherOnReviewableChangeOwnerSelfCcInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    editCommitMessage(sc, other, CC_ON_OWN_COMMENTS);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .to(sc.owner, sc.reviewer, sc.ccer, other)
-        .bcc(sc.starrer)
-        .bcc(NEW_PATCHSETS)
-        .noOneElse();
-  }
-
-  @Test
-  public void editCommitMessageByOtherOnReviewableChangeNotifyOwnerReviewersInNoteDb()
-      throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void editCommitMessageByOtherOnReviewableChangeNotifyOwnerReviewers() throws Exception {
     StagedChange sc = stageReviewableChange();
     editCommitMessage(sc, other, OWNER_REVIEWERS);
     assertThat(sender)
@@ -2119,18 +1812,8 @@
   }
 
   @Test
-  public void editCommitMessageByOtherOnReviewableChangeNotifyOwnerReviewersInReviewDb()
+  public void editCommitMessageByOtherOnReviewableChangeOwnerSelfCcNotifyOwnerReviewers()
       throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    editCommitMessage(sc, other, OWNER_REVIEWERS);
-    assertThat(sender).sent("newpatchset", sc).to(sc.owner, sc.reviewer, sc.ccer).noOneElse();
-  }
-
-  @Test
-  public void editCommitMessageByOtherOnReviewableChangeOwnerSelfCcNotifyOwnerReviewersInNoteDb()
-      throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
     StagedChange sc = stageReviewableChange();
     editCommitMessage(sc, other, OWNER_REVIEWERS, CC_ON_OWN_COMMENTS);
     assertThat(sender)
@@ -2142,19 +1825,6 @@
   }
 
   @Test
-  public void editCommitMessageByOtherOnReviewableChangeOwnerSelfCcNotifyOwnerReviewersInReviewDb()
-      throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    editCommitMessage(sc, other, OWNER_REVIEWERS, CC_ON_OWN_COMMENTS);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .to(sc.owner, sc.reviewer, sc.ccer)
-        .cc(other)
-        .noOneElse();
-  }
-
-  @Test
   public void editCommitMessageByOtherOnReviewableChangeNotifyOwner() throws Exception {
     StagedChange sc = stageReviewableChange();
     editCommitMessage(sc, other, OWNER);
@@ -2204,8 +1874,7 @@
   }
 
   @Test
-  public void editCommitMessageOnWipChangeNotifyAllInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void editCommitMessageOnWipChangeNotifyAll() throws Exception {
     StagedChange sc = stageWipChange();
     editCommitMessage(sc, sc.owner, ALL);
     assertThat(sender)
@@ -2218,19 +1887,6 @@
         .noOneElse();
   }
 
-  @Test
-  public void editCommitMessageOnWipChangeNotifyAllInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageWipChange();
-    editCommitMessage(sc, sc.owner, ALL);
-    assertThat(sender)
-        .sent("newpatchset", sc)
-        .to(sc.reviewer, sc.ccer)
-        .bcc(sc.starrer)
-        .bcc(NEW_PATCHSETS)
-        .noOneElse();
-  }
-
   private void editCommitMessage(StagedChange sc, TestAccount by) throws Exception {
     editCommitMessage(sc, by, null, ENABLED);
   }
@@ -2357,31 +2013,7 @@
    */
 
   @Test
-  public void revertChangeByOwnerInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageChange();
-    revert(sc, sc.owner);
-
-    // email for the newly created revert change
-    assertThat(sender)
-        .sent("newchange", sc)
-        .to(sc.reviewer, sc.ccer, sc.watchingProjectOwner, admin)
-        .bcc(NEW_CHANGES, NEW_PATCHSETS)
-        .noOneElse();
-
-    // email for the change that is reverted
-    assertThat(sender)
-        .sent("revert", sc)
-        .cc(sc.reviewer, sc.ccer, admin)
-        .cc(sc.reviewerByEmail)
-        .bcc(sc.starrer)
-        .bcc(ALL_COMMENTS)
-        .noOneElse();
-  }
-
-  @Test
-  public void revertChangeByOwnerInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void revertChangeByOwner() throws Exception {
     StagedChange sc = stageChange();
     revert(sc, sc.owner);
 
@@ -2404,33 +2036,7 @@
   }
 
   @Test
-  public void revertChangeByOwnerCcingSelfInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageChange();
-    revert(sc, sc.owner, CC_ON_OWN_COMMENTS);
-
-    // email for the newly created revert change
-    assertThat(sender)
-        .sent("newchange", sc)
-        .to(sc.reviewer, sc.ccer, sc.watchingProjectOwner, admin)
-        .cc(sc.owner)
-        .bcc(NEW_CHANGES, NEW_PATCHSETS)
-        .noOneElse();
-
-    // email for the change that is reverted
-    assertThat(sender)
-        .sent("revert", sc)
-        .to(sc.owner)
-        .cc(sc.reviewer, sc.ccer, admin)
-        .cc(sc.reviewerByEmail)
-        .bcc(sc.starrer)
-        .bcc(ALL_COMMENTS)
-        .noOneElse();
-  }
-
-  @Test
-  public void revertChangeByOwnerCcingSelfInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void revertChangeByOwnerCcingSelf() throws Exception {
     StagedChange sc = stageChange();
     revert(sc, sc.owner, CC_ON_OWN_COMMENTS);
 
@@ -2454,32 +2060,7 @@
   }
 
   @Test
-  public void revertChangeByOtherInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageChange();
-    revert(sc, other);
-
-    // email for the newly created revert change
-    assertThat(sender)
-        .sent("newchange", sc)
-        .to(sc.owner, sc.reviewer, sc.ccer, sc.watchingProjectOwner, admin)
-        .bcc(NEW_CHANGES, NEW_PATCHSETS)
-        .noOneElse();
-
-    // email for the change that is reverted
-    assertThat(sender)
-        .sent("revert", sc)
-        .to(sc.owner)
-        .cc(sc.reviewer, sc.ccer, admin)
-        .cc(sc.reviewerByEmail)
-        .bcc(sc.starrer)
-        .bcc(ALL_COMMENTS)
-        .noOneElse();
-  }
-
-  @Test
-  public void revertChangeByOtherInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void revertChangeByOther() throws Exception {
     StagedChange sc = stageChange();
     revert(sc, other);
 
@@ -2503,33 +2084,7 @@
   }
 
   @Test
-  public void revertChangeByOtherCcingSelfInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageChange();
-    revert(sc, other, CC_ON_OWN_COMMENTS);
-
-    // email for the newly created revert change
-    assertThat(sender)
-        .sent("newchange", sc)
-        .to(sc.owner, sc.reviewer, sc.ccer, sc.watchingProjectOwner, admin)
-        .cc(other)
-        .bcc(NEW_CHANGES, NEW_PATCHSETS)
-        .noOneElse();
-
-    // email for the change that is reverted
-    assertThat(sender)
-        .sent("revert", sc)
-        .to(sc.owner)
-        .cc(other, sc.reviewer, sc.ccer, admin)
-        .cc(sc.reviewerByEmail)
-        .bcc(sc.starrer)
-        .bcc(ALL_COMMENTS)
-        .noOneElse();
-  }
-
-  @Test
-  public void revertChangeByOtherCcingSelfInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void revertChangeByOtherCcingSelf() throws Exception {
     StagedChange sc = stageChange();
     revert(sc, other, CC_ON_OWN_COMMENTS);
 
@@ -2623,8 +2178,7 @@
   }
 
   @Test
-  public void setAssigneeToSelfOnReviewableChangeInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void setAssigneeToSelfOnReviewableChange() throws Exception {
     StagedChange sc = stageReviewableChange();
     assign(sc, sc.owner, sc.owner);
     assertThat(sender)
@@ -2634,14 +2188,6 @@
   }
 
   @Test
-  public void setAssigneeToSelfOnReviewableChangeInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    assign(sc, sc.owner, sc.owner);
-    assertThat(sender).notSent();
-  }
-
-  @Test
   public void changeAssigneeOnReviewableChange() throws Exception {
     StagedChange sc = stageReviewableChange();
     TestAccount other = accountCreator.create("other", "other@example.com", "other");
@@ -2656,8 +2202,7 @@
   }
 
   @Test
-  public void changeAssigneeToSelfOnReviewableChangeInNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void changeAssigneeToSelfOnReviewableChange() throws Exception {
     StagedChange sc = stageReviewableChange();
     assign(sc, sc.owner, sc.assignee);
     sender.clear();
@@ -2669,16 +2214,6 @@
   }
 
   @Test
-  public void changeAssigneeToSelfOnReviewableChangeInReviewDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    StagedChange sc = stageReviewableChange();
-    assign(sc, sc.owner, sc.assignee);
-    sender.clear();
-    assign(sc, sc.owner, sc.owner);
-    assertThat(sender).notSent();
-  }
-
-  @Test
   public void setAssigneeOnReviewableWipChange() throws Exception {
     StagedChange sc = stageReviewableWipChange();
     assign(sc, sc.owner, sc.assignee);
diff --git a/javatests/com/google/gerrit/acceptance/server/notedb/NoteDbOnlyIT.java b/javatests/com/google/gerrit/acceptance/server/notedb/NoteDbOnlyIT.java
index 8d6fecd..5047b73 100644
--- a/javatests/com/google/gerrit/acceptance/server/notedb/NoteDbOnlyIT.java
+++ b/javatests/com/google/gerrit/acceptance/server/notedb/NoteDbOnlyIT.java
@@ -16,7 +16,6 @@
 
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.common.truth.Truth8.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.extensions.client.ListChangesOption.MESSAGES;
 import static java.util.stream.Collectors.toList;
 
@@ -56,7 +55,6 @@
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.eclipse.jgit.revwalk.RevSort;
 import org.eclipse.jgit.revwalk.RevWalk;
-import org.junit.Before;
 import org.junit.Test;
 
 public class NoteDbOnlyIT extends AbstractDaemonTest {
@@ -70,14 +68,8 @@
 
   @Inject private RetryHelper retryHelper;
 
-  @Before
-  public void setUp() throws Exception {
-    assume().that(notesMigration.disableChangeReviewDb()).isTrue();
-  }
-
   @Test
   public void updateChangeFailureRollsBackRefUpdate() throws Exception {
-    assume().that(notesMigration.disableChangeReviewDb()).isTrue();
     PushOneCommit.Result r = createChange();
     Change.Id id = r.getChange().getId();
 
@@ -149,7 +141,6 @@
 
   @Test
   public void retryOnLockFailureWithAtomicUpdates() throws Exception {
-    assume().that(notesMigration.disableChangeReviewDb()).isTrue();
     PushOneCommit.Result r = createChange();
     Change.Id id = r.getChange().getId();
     String master = "refs/heads/master";
diff --git a/javatests/com/google/gerrit/acceptance/server/project/ReflogIT.java b/javatests/com/google/gerrit/acceptance/server/project/ReflogIT.java
index 8abb59d..04303ea 100644
--- a/javatests/com/google/gerrit/acceptance/server/project/ReflogIT.java
+++ b/javatests/com/google/gerrit/acceptance/server/project/ReflogIT.java
@@ -15,7 +15,6 @@
 package com.google.gerrit.acceptance.server.project;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.common.truth.TruthJUnit.assume;
 import static com.google.gerrit.reviewdb.client.RefNames.changeMetaRef;
 
 import com.google.gerrit.acceptance.AbstractDaemonTest;
@@ -40,7 +39,6 @@
 public class ReflogIT extends AbstractDaemonTest {
   @Test
   public void guessRestApiInReflog() throws Exception {
-    assume().that(notesMigration.disableChangeReviewDb()).isTrue();
     PushOneCommit.Result r = createChange();
     Change.Id id = r.getChange().getId();
 
diff --git a/javatests/com/google/gerrit/server/notedb/CommentJsonMigratorTest.java b/javatests/com/google/gerrit/server/notedb/CommentJsonMigratorTest.java
index b63adab..fbec5e6 100644
--- a/javatests/com/google/gerrit/server/notedb/CommentJsonMigratorTest.java
+++ b/javatests/com/google/gerrit/server/notedb/CommentJsonMigratorTest.java
@@ -547,11 +547,9 @@
     // TODO(dborowitz): Comparing collections directly would be much easier, but Comment doesn't
     // have a proper equals; switch to that when the issues with
     // https://gerrit-review.googlesource.com/c/gerrit/+/207013 are resolved.
+    assertCommentsEqual(commentsUtil.draftByChange(actual), commentsUtil.draftByChange(expected));
     assertCommentsEqual(
-        commentsUtil.draftByChange(null, actual), commentsUtil.draftByChange(null, expected));
-    assertCommentsEqual(
-        commentsUtil.publishedByChange(null, actual),
-        commentsUtil.publishedByChange(null, expected));
+        commentsUtil.publishedByChange(actual), commentsUtil.publishedByChange(expected));
 
     // Change metadata is equal.
     assertLogEqualExceptTrees(
diff --git a/javatests/com/google/gerrit/server/query/change/AbstractQueryChangesTest.java b/javatests/com/google/gerrit/server/query/change/AbstractQueryChangesTest.java
index 928eeb3..fb20a05 100644
--- a/javatests/com/google/gerrit/server/query/change/AbstractQueryChangesTest.java
+++ b/javatests/com/google/gerrit/server/query/change/AbstractQueryChangesTest.java
@@ -52,7 +52,6 @@
 import com.google.gerrit.extensions.api.changes.NotifyHandling;
 import com.google.gerrit.extensions.api.changes.ReviewInput;
 import com.google.gerrit.extensions.api.changes.ReviewInput.DraftHandling;
-import com.google.gerrit.extensions.api.changes.ReviewInput.RobotCommentInput;
 import com.google.gerrit.extensions.api.changes.StarsInput;
 import com.google.gerrit.extensions.api.groups.GroupInput;
 import com.google.gerrit.extensions.api.projects.ConfigInput;
@@ -69,7 +68,6 @@
 import com.google.gerrit.extensions.restapi.RestApiException;
 import com.google.gerrit.index.FieldDef;
 import com.google.gerrit.index.IndexConfig;
-import com.google.gerrit.index.QueryOptions;
 import com.google.gerrit.index.Schema;
 import com.google.gerrit.lifecycle.LifecycleManager;
 import com.google.gerrit.reviewdb.client.Account;
@@ -81,7 +79,6 @@
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.reviewdb.client.RefNames;
 import com.google.gerrit.reviewdb.server.ReviewDb;
-import com.google.gerrit.reviewdb.server.ReviewDbUtil;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.PatchSetUtil;
@@ -102,11 +99,7 @@
 import com.google.gerrit.server.index.change.ChangeField;
 import com.google.gerrit.server.index.change.ChangeIndexCollection;
 import com.google.gerrit.server.index.change.ChangeIndexer;
-import com.google.gerrit.server.index.change.IndexedChangeQuery;
-import com.google.gerrit.server.index.change.StalenessChecker;
 import com.google.gerrit.server.notedb.ChangeNotes;
-import com.google.gerrit.server.notedb.NoteDbChangeState;
-import com.google.gerrit.server.notedb.NoteDbChangeState.PrimaryStorage;
 import com.google.gerrit.server.project.ProjectCache;
 import com.google.gerrit.server.project.ProjectConfig;
 import com.google.gerrit.server.schema.SchemaCreator;
@@ -116,9 +109,7 @@
 import com.google.gerrit.server.util.RequestContext;
 import com.google.gerrit.server.util.ThreadLocalRequestContext;
 import com.google.gerrit.server.util.time.TimeUtil;
-import com.google.gerrit.testing.DisabledReviewDb;
 import com.google.gerrit.testing.GerritServerTests;
-import com.google.gerrit.testing.InMemoryDatabase;
 import com.google.gerrit.testing.InMemoryRepositoryManager;
 import com.google.gerrit.testing.InMemoryRepositoryManager.Repo;
 import com.google.gerrit.testing.TestTimeUtil;
@@ -131,13 +122,11 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.Optional;
 import java.util.concurrent.TimeUnit;
 import org.eclipse.jgit.junit.TestRepository;
 import org.eclipse.jgit.lib.ObjectId;
@@ -185,8 +174,6 @@
   @Inject protected MetaDataUpdate.Server metaDataUpdateFactory;
   @Inject protected IdentifiedUser.GenericFactory identifiedUserFactory;
 
-  @Inject private InMemoryDatabase inMemoryDatabase;
-
   protected Injector injector;
   protected LifecycleManager lifecycle;
   protected ReviewDb db;
@@ -573,7 +560,6 @@
   @Test
   public void restorePendingReviewers() throws Exception {
     assume().that(getSchemaVersion()).isAtLeast(44);
-    assume().that(notesMigration.readChanges()).isTrue();
 
     Project.NameKey project = new Project.NameKey("repo");
     TestRepository<Repo> repo = createProject(project.get());
@@ -1600,8 +1586,7 @@
   }
 
   @Test
-  public void byHashtagWithNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
+  public void byHashtag() throws Exception {
     List<Change> changes = setUpHashtagChanges();
     assertQuery("hashtag:foo", changes.get(1), changes.get(0));
     assertQuery("hashtag:bar", changes.get(1));
@@ -1613,35 +1598,6 @@
   }
 
   @Test
-  public void byHashtagWithoutNoteDb() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-
-    notesMigration.setWriteChanges(true);
-    notesMigration.setReadChanges(true);
-    db.close();
-    db = schemaFactory.open();
-    List<Change> changes;
-    try {
-      changes = setUpHashtagChanges();
-      notesMigration.setWriteChanges(false);
-      notesMigration.setReadChanges(false);
-    } finally {
-      db.close();
-    }
-    db = schemaFactory.open();
-    for (Change c : changes) {
-      indexer.index(db, c); // Reindex without hashtag field.
-    }
-    assertQuery("hashtag:foo");
-    assertQuery("hashtag:bar");
-    assertQuery("hashtag:\" bar \"");
-    assertQuery("hashtag:\"a tag\"");
-    assertQuery("hashtag:\" a tag \"");
-    assertQuery("hashtag:#foo");
-    assertQuery("hashtag:\"# #foo\"");
-  }
-
-  @Test
   public void byDefault() throws Exception {
     TestRepository<Repo> repo = createProject("repo");
 
@@ -1772,8 +1728,6 @@
 
   @Test
   public void byDraftByExcludesZombieDrafts() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     Project.NameKey project = new Project.NameKey("repo");
     TestRepository<Repo> repo = createProject(project.get());
     Change change = insert(repo, newChange(repo));
@@ -1805,18 +1759,6 @@
     allUsers.update(draftsRef.getName(), draftsRef.getObjectId());
     assertThat(allUsers.getRepository().exactRef(draftsRef.getName())).isNotNull();
 
-    if (PrimaryStorage.of(change) == PrimaryStorage.REVIEW_DB
-        && !notesMigration.disableChangeReviewDb()) {
-      // Record draft ref in noteDbState as well.
-      ReviewDb db = ReviewDbUtil.unwrapDb(this.db);
-      change = db.changes().get(id);
-      NoteDbChangeState.applyDelta(
-          change,
-          NoteDbChangeState.Delta.create(
-              id, Optional.empty(), ImmutableMap.of(userId, draftsRef.getObjectId())));
-      db.changes().update(Collections.singleton(change));
-    }
-
     indexer.index(db, project, id);
     assertQuery("draftby:" + userId);
   }
@@ -2031,17 +1973,10 @@
     assertQuery("reviewer:self", change3);
 
     requestContext.setContext(newRequestContext(user1));
-    if (notesMigration.readChanges()) {
-      assertQuery("reviewer:" + user1, change1);
-      assertQuery("cc:" + user1, change2);
-      assertQuery("is:cc", change2);
-      assertQuery("cc:self", change2);
-    } else {
-      assertQuery("reviewer:" + user1, change2, change1);
-      assertQuery("cc:" + user1);
-      assertQuery("is:cc");
-      assertQuery("cc:self");
-    }
+    assertQuery("reviewer:" + user1, change1);
+    assertQuery("cc:" + user1, change2);
+    assertQuery("is:cc", change2);
+    assertQuery("cc:self", change2);
   }
 
   @Test
@@ -2104,36 +2039,19 @@
             .collect(toList());
     assertThat(members).contains(user2.toString());
 
-    if (notesMigration.readChanges()) {
-      // CC and REVIEWER are separate in NoteDB
-      assertQuery("reviewerin:\"Registered Users\"", change2, change1);
-      assertQuery("reviewerin:" + group, change2);
-    } else {
-      // CC and REVIEWER are the same in ReviewDb
-      assertQuery("reviewerin:\"Registered Users\"", change3, change2, change1);
-      assertQuery("reviewerin:" + group, change3, change2);
-    }
+    assertQuery("reviewerin:\"Registered Users\"", change2, change1);
+    assertQuery("reviewerin:" + group, change2);
 
     gApi.changes().id(change2.getId().get()).current().review(ReviewInput.approve());
     gApi.changes().id(change2.getId().get()).current().submit();
 
-    if (notesMigration.readChanges()) {
-      // CC and REVIEWER are separate in NoteDB
-      assertQuery("reviewerin:" + group, change2);
-      assertQuery("project:repo reviewerin:" + group, change2);
-      assertQuery("status:merged reviewerin:" + group, change2);
-    } else {
-      // CC and REVIEWER are the same in ReviewDb
-      assertQuery("reviewerin:" + group, change2, change3);
-      assertQuery("project:repo reviewerin:" + group, change2, change3);
-      assertQuery("status:merged reviewerin:" + group, change2);
-    }
+    assertQuery("reviewerin:" + group, change2);
+    assertQuery("project:repo reviewerin:" + group, change2);
+    assertQuery("status:merged reviewerin:" + group, change2);
   }
 
   @Test
   public void reviewerAndCcByEmail() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     Project.NameKey project = new Project.NameKey("repo");
     TestRepository<Repo> repo = createProject(project.get());
     ConfigInput conf = new ConfigInput();
@@ -2180,8 +2098,6 @@
 
   @Test
   public void reviewerAndCcByEmailWithQueryForDifferentUser() throws Exception {
-    assume().that(notesMigration.readChanges()).isTrue();
-
     Project.NameKey project = new Project.NameKey("repo");
     TestRepository<Repo> repo = createProject(project.get());
     ConfigInput conf = new ConfigInput();
@@ -2354,71 +2270,6 @@
   }
 
   @Test
-  public void prepopulatedFields() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    TestRepository<Repo> repo = createProject("repo");
-    Change change = insert(repo, newChange(repo));
-
-    db = new DisabledReviewDb();
-    requestContext.setContext(newRequestContext(userId));
-    // Use QueryProcessor directly instead of API so we get ChangeDatas back.
-    List<ChangeData> cds =
-        queryProcessorProvider
-            .get()
-            .query(queryBuilder.parse(change.getId().toString()))
-            .entities();
-    assertThat(cds).hasSize(1);
-
-    ChangeData cd = cds.get(0);
-    cd.change();
-    cd.patchSets();
-    cd.currentApprovals();
-    cd.changedLines();
-    cd.reviewedBy();
-    cd.reviewers();
-    cd.unresolvedCommentCount();
-
-    if (getSchemaVersion() < 51) {
-      assertMissingField(ChangeField.TOTAL_COMMENT_COUNT);
-    } else {
-      cd.totalCommentCount();
-    }
-
-    // TODO(dborowitz): Swap out GitRepositoryManager somehow? Will probably be
-    // necessary for NoteDb anyway.
-    cd.isMergeable();
-
-    exception.expect(DisabledReviewDb.Disabled.class);
-    cd.messages();
-  }
-
-  @Test
-  public void prepopulateOnlyRequestedFields() throws Exception {
-    assume().that(notesMigration.readChanges()).isFalse();
-    TestRepository<Repo> repo = createProject("repo");
-    Change change = insert(repo, newChange(repo));
-
-    db = new DisabledReviewDb();
-    requestContext.setContext(newRequestContext(userId));
-    // Use QueryProcessor directly instead of API so we get ChangeDatas back.
-    List<ChangeData> cds =
-        queryProcessorProvider
-            .get()
-            .setRequestedFields(
-                ImmutableSet.of(ChangeField.PATCH_SET.getName(), ChangeField.CHANGE.getName()))
-            .query(queryBuilder.parse(change.getId().toString()))
-            .entities();
-    assertThat(cds).hasSize(1);
-
-    ChangeData cd = cds.get(0);
-    cd.change();
-    cd.patchSets();
-
-    exception.expect(DisabledReviewDb.Disabled.class);
-    cd.currentApprovals();
-  }
-
-  @Test
   public void reindexIfStale() throws Exception {
     Account.Id user = createAccount("user");
     Project.NameKey project = new Project.NameKey("repo");
@@ -2426,7 +2277,7 @@
     Change change = insert(repo, newChange(repo));
     String changeId = change.getKey().get();
     ChangeNotes notes = notesFactory.create(db, change.getProject(), change.getId());
-    PatchSet ps = psUtil.get(db, notes, change.currentPatchSetId());
+    PatchSet ps = psUtil.get(notes, change.currentPatchSetId());
 
     requestContext.setContext(newRequestContext(user));
     gApi.changes().id(changeId).edit().create();
@@ -2446,93 +2297,6 @@
   }
 
   @Test
-  public void refStateFields() throws Exception {
-    // This test method manages primary storage manually.
-    assume().that(notesMigration.changePrimaryStorage()).isEqualTo(PrimaryStorage.REVIEW_DB);
-    Account.Id user = createAccount("user");
-    Project.NameKey project = new Project.NameKey("repo");
-    TestRepository<Repo> repo = createProject(project.get());
-    String path = "file";
-    RevCommit commit = repo.parseBody(repo.commit().message("one").add(path, "contents").create());
-    Change change = insert(repo, newChangeForCommit(repo, commit));
-    Change.Id id = change.getId();
-    int c = id.get();
-    String changeId = change.getKey().get();
-    requestContext.setContext(newRequestContext(user));
-
-    // Ensure one of each type of supported ref is present for the change. If
-    // any more refs are added, update this test to reflect them.
-
-    // Edit
-    gApi.changes().id(changeId).edit().create();
-
-    // Star
-    gApi.accounts().self().starChange(change.getId().toString());
-
-    if (notesMigration.readChanges()) {
-      // Robot comment.
-      ReviewInput rin = new ReviewInput();
-      RobotCommentInput rcin = new RobotCommentInput();
-      rcin.robotId = "happyRobot";
-      rcin.robotRunId = "1";
-      rcin.line = 1;
-      rcin.message = "nit: trailing whitespace";
-      rcin.path = path;
-      rin.robotComments = ImmutableMap.of(path, ImmutableList.of(rcin));
-      gApi.changes().id(c).current().review(rin);
-    }
-
-    // Draft.
-    DraftInput din = new DraftInput();
-    din.path = path;
-    din.line = 1;
-    din.message = "draft";
-    gApi.changes().id(c).current().createDraft(din);
-
-    if (notesMigration.readChanges()) {
-      // Force NoteDb primary.
-      change = ReviewDbUtil.unwrapDb(db).changes().get(id);
-      change.setNoteDbState(NoteDbChangeState.NOTE_DB_PRIMARY_STATE);
-      ReviewDbUtil.unwrapDb(db).changes().update(Collections.singleton(change));
-      indexer.index(db, change);
-    }
-
-    QueryOptions opts =
-        IndexedChangeQuery.createOptions(indexConfig, 0, 1, StalenessChecker.FIELDS);
-    ChangeData cd = indexes.getSearchIndex().get(id, opts).get();
-
-    String cs = RefNames.shard(c);
-    int u = user.get();
-    String us = RefNames.shard(u);
-
-    List<String> expectedStates =
-        Lists.newArrayList(
-            "repo:refs/users/" + us + "/edit-" + c + "/1",
-            "All-Users:refs/starred-changes/" + cs + "/" + u);
-    if (notesMigration.readChanges()) {
-      expectedStates.add("repo:refs/changes/" + cs + "/meta");
-      expectedStates.add("repo:refs/changes/" + cs + "/robot-comments");
-      expectedStates.add("All-Users:refs/draft-comments/" + cs + "/" + u);
-    }
-    assertThat(
-            cd.getRefStates()
-                .stream()
-                .map(String::new)
-                // Omit SHA-1, we're just concerned with the project/ref names.
-                .map(s -> s.substring(0, s.lastIndexOf(':')))
-                .collect(toList()))
-        .containsExactlyElementsIn(expectedStates);
-
-    List<String> expectedPatterns = Lists.newArrayList("repo:refs/users/*/edit-" + c + "/*");
-    expectedPatterns.add("All-Users:refs/starred-changes/" + cs + "/*");
-    if (notesMigration.readChanges()) {
-      expectedPatterns.add("All-Users:refs/draft-comments/" + cs + "/*");
-    }
-    assertThat(cd.getRefStatePatterns().stream().map(String::new).collect(toList()))
-        .containsExactlyElementsIn(expectedPatterns);
-  }
-
-  @Test
   public void watched() throws Exception {
     TestRepository<Repo> repo = createProject("repo");
     ChangeInserter ins1 = newChangeWithStatus(repo, Change.Status.NEW);
diff --git a/plugins/delete-project b/plugins/delete-project
index e0618f3..d8fdd55 160000
--- a/plugins/delete-project
+++ b/plugins/delete-project
@@ -1 +1 @@
-Subproject commit e0618f3dff8fcc1c36861a99b2162ac611e707c6
+Subproject commit d8fdd5596181cc06707665051f0e03a49e5c3a97