AccountPatchReview mariadb: fix key length

Setting up the db on mariadb currently fails with

 com.google.gerrit.exceptions.StorageException: create failure on ACCOUNT_PATCH_REVIEWS
 at com.google.gerrit.server.schema.JdbcAccountPatchReviewStore.createTableIfNotExists(JdbcAccountPatchReviewStore.java:188)
 ...
 Caused by: java.sql.SQLSyntaxErrorException: (conn=13) Specified key was too long; max key length is 3072 bytes

If35aff6c8d dealt with this for mysql, this just ports it to mariadb.

Out of interest, I did a query on the file_name size on our production
database.

 +---------------+---------------+---------------+----------------+
 | pct_length_10 | pct_length_20 | pct_length_50 | pct_length_100 |
 +---------------+---------------+---------------+----------------+
 |          2.14 |         15.96 |         77.80 |          99.48 |
 +---------------+---------------+---------------+----------------+

So 100 characters gets 99.48% of file names.  Our longest filename is
249 characters apparently.  We could probably optimize this with
partial indexes if required.

Change-Id: Ide9a8c647565d657d691a73be76129f237bf6ebb

java/com/google/gerrit/server/schema/MariaDBAccountPatchReviewStore.java

diff --git a/java/com/google/gerrit/server/schema/MariaDBAccountPatchReviewStore.java b/java/com/google/gerrit/server/schema/MariaDBAccountPatchReviewStore.java
index b0a3370..dd82be2 100644
--- a/java/com/google/gerrit/server/schema/MariaDBAccountPatchReviewStore.java
+++ b/java/com/google/gerrit/server/schema/MariaDBAccountPatchReviewStore.java
@@ -22,6 +22,7 @@
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 import java.sql.SQLException;
+import java.sql.Statement;
 import org.eclipse.jgit.lib.Config;
 
 @Singleton
@@ -50,4 +51,17 @@
         return new StorageException(op + " failure on ACCOUNT_PATCH_REVIEWS", err);
     }
   }
+
+  @Override
+  protected void doCreateTable(Statement stmt) throws SQLException {
+    stmt.executeUpdate(
+        "CREATE TABLE IF NOT EXISTS account_patch_reviews ("
+            + "account_id INTEGER DEFAULT 0 NOT NULL, "
+            + "change_id INTEGER DEFAULT 0 NOT NULL, "
+            + "patch_set_id INTEGER DEFAULT 0 NOT NULL, "
+            + "file_name VARCHAR(255) DEFAULT '' NOT NULL, "
+            + "CONSTRAINT primary_key_account_patch_reviews "
+            + "PRIMARY KEY (change_id, patch_set_id, account_id, file_name)"
+            + ")");
+  }
 }