Merge branch 'issues-closed-at-steal' into 'master'

Finish any remaining jobs for issues.closed_at

Closes #41595

See merge request gitlab-org/gitlab-ce!16858

changelogs/unreleased/issues-closed-at-steal.yml

+---
+title: Finish any remaining jobs for issues.closed_at
+merge_request:
+author:
+type: other

db/migrate/20180201145907_migrate_remaining_issues_closed_at.rb

+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class MigrateRemainingIssuesClosedAt < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  class Issue < ActiveRecord::Base
+    self.table_name = 'issues'
+    include EachBatch
+  end
+
+  def up
+    Gitlab::BackgroundMigration.steal('CopyColumn')
+    Gitlab::BackgroundMigration.steal('CleanupConcurrentTypeChange')
+
+    # It's possible the cleanup job was killed which means we need to manually
+    # migrate any remaining rows.
+    migrate_remaining_rows if migrate_column_type?
+  end
+
+  def down
+  end
+
+  def migrate_remaining_rows
+    Issue.where('closed_at_for_type_change IS NULL AND closed_at IS NOT NULL').each_batch do |batch|
+      batch.update_all('closed_at_for_type_change = closed_at')
+    end
+
+    cleanup_concurrent_column_type_change(:issues, :closed_at)
+  end
+
+  def migrate_column_type?
+    # Some environments may have already executed the previous version of this
+    # migration, thus we don't need to migrate those environments again.
+    column_for('issues', 'closed_at').type == :datetime # rubocop:disable Migration/Datetime
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20180115201419) do
+ActiveRecord::Schema.define(version: 20180201145907) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"