1 files changed, 29 insertions, 0 deletions
diff --git a/db/migrate/20190919104119_index_timestamp_columns_for_merge_requests_creation_date.rb b/db/migrate/20190919104119_index_timestamp_columns_for_merge_requests_creation_date.rb
new file mode 100644
index 00000000000..5e0d80630cd
--- /dev/null
+++ b/db/migrate/20190919104119_index_timestamp_columns_for_merge_requests_creation_date.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+class IndexTimestampColumnsForMergeRequestsCreationDate < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index(*index_arguments)
+  end
+
+  def down
+    remove_concurrent_index(*index_arguments)
+  end
+
+  private
+
+  def index_arguments
+    [
+      :merge_requests,
+      [:target_project_id, :created_at],
+      {
+        name: 'index_merge_requests_target_project_id_created_at'
+      }
+    ]
+  end
+end