Output patchset creation date for 'query' command. Change-Id: I10d9b50e1b562dc4d9fe57ce7644d5ccbe1b947c

diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/events/EventFactory.java b/gerrit-server/src/main/java/com/google/gerrit/server/events/EventFactory.java
index ba9fa2c..2740d7f 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/events/EventFactory.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/events/EventFactory.java

@@ -174,6 +174,7 @@
     p.number = Integer.toString(patchSet.getPatchSetId());
     p.ref = patchSet.getRefName();
     p.uploader = asAccountAttribute(patchSet.getUploader());
+    p.createdOn = patchSet.getCreatedOn().getTime() / 1000L;
     return p;
   }
 

diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/events/PatchSetAttribute.java b/gerrit-server/src/main/java/com/google/gerrit/server/events/PatchSetAttribute.java
index a6d0eca..ee29314 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/events/PatchSetAttribute.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/events/PatchSetAttribute.java

@@ -21,6 +21,7 @@
     public String revision;
     public String ref;
     public AccountAttribute uploader;
+    public Long createdOn;
 
     public List<ApprovalAttribute> approvals;
     public List<PatchSetCommentAttribute> comments;

diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/query/change/QueryProcessor.java b/gerrit-server/src/main/java/com/google/gerrit/server/query/change/QueryProcessor.java
index 20db0f9..2abec9a 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/query/change/QueryProcessor.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/query/change/QueryProcessor.java

@@ -345,7 +345,8 @@
   private static boolean isDateField(String name) {
     return "lastUpdated".equals(name) //
         || "grantedOn".equals(name) //
-        || "timestamp".equals(name);
+        || "timestamp".equals(name) //
+        || "createdOn".equals(name);
   }
 
   private List<Field> fieldsOf(Class<?> type) {