Add latest changes from gitlab-org/gitlab@12-4-stable-ee

1 files changed, 19 insertions, 0 deletions

diff --git a/db/migrate/20190927055540_add_index_to_sytem_note_metadata_description_version_id.rb b/db/migrate/20190927055540_add_index_to_sytem_note_metadata_description_version_id.rb
new file mode 100644
index 00000000000..695ba955043
--- /dev/null
+++ b/db/migrate/20190927055540_add_index_to_sytem_note_metadata_description_version_id.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class AddIndexToSytemNoteMetadataDescriptionVersionId < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :system_note_metadata, :description_version_id, unique: true, where: 'description_version_id IS NOT NULL'
+    add_concurrent_foreign_key :system_note_metadata, :description_versions, column: :description_version_id, on_delete: :nullify
+  end
+
+  def down
+    remove_foreign_key :system_note_metadata, column: :description_version_id
+    remove_concurrent_index :system_note_metadata, :description_version_id
+  end
+end