1 files changed, 22 insertions, 0 deletions
diff --git a/db/post_migrate/20211207090503_cleanup_first_mentioned_in_commit_jobs.rb b/db/post_migrate/20211207090503_cleanup_first_mentioned_in_commit_jobs.rb
new file mode 100644
index 00000000000..3788a680fb6
--- /dev/null
+++ b/db/post_migrate/20211207090503_cleanup_first_mentioned_in_commit_jobs.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+class CleanupFirstMentionedInCommitJobs < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  MIGRATION = 'FixFirstMentionedInCommitAt'
+  INDEX_NAME = 'index_issue_metrics_first_mentioned_in_commit'
+
+  def up
+    finalize_background_migration(MIGRATION)
+
+    remove_concurrent_index_by_name :issue_metrics, name: INDEX_NAME
+  end
+
+  def down
+    # Handles reported schema inconsistencies (column with or without timezone)
+    # We did the same in db/post_migrate/20211004110500_add_temporary_index_to_issue_metrics.rb
+    condition = Gitlab::BackgroundMigration::FixFirstMentionedInCommitAt::TmpIssueMetrics
+      .first_mentioned_in_commit_at_condition
+    add_concurrent_index :issue_metrics, :issue_id, where: condition, name: INDEX_NAME
+  end
+end