Remove bigint conversion triggers for events

Also ignore the `int4` columns so that we can remove them in later
release.

See https://gitlab.com/gitlab-org/gitlab/-/issues/338072.

Changelog: other

app/models/event.rb

@@ -9,6 +9,9 @@ class Event < ApplicationRecord
   include Gitlab::Utils::StrongMemoize
   include UsageStatistics
   include ShaAttribute
+  include IgnorableColumns
+
+  ignore_columns :id_convert_to_bigint, remove_with: '14.5', remove_after: '2021-10-22'
 
   default_scope { reorder(nil) } # rubocop:disable Cop/DefaultScope
 

db/post_migrate/20210901044237_events_bigint_conversion_remove_triggers.rb

+# frozen_string_literal: true
+
+class EventsBigintConversionRemoveTriggers < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  TABLE_NAME = :events
+  TRIGGER_NAME = :trigger_69523443cc10
+
+  # rubocop:disable Migration/WithLockRetriesDisallowedMethod
+  def up
+    check_trigger_permissions!(TABLE_NAME)
+
+    with_lock_retries do
+      remove_rename_triggers(TABLE_NAME, TRIGGER_NAME)
+    end
+  end
+
+  def down
+    check_trigger_permissions!(TABLE_NAME)
+
+    with_lock_retries do
+      install_rename_triggers(TABLE_NAME, :id, :id_convert_to_bigint, trigger_name: TRIGGER_NAME)
+    end
+  end
+  # rubocop:enable Migration/WithLockRetriesDisallowedMethod
+end

db/schema_migrations/20210901044237

+0d8caaa078914ed2bd43b383ee2efe50093947d65862c2f4dd8dc960cad0a43e
\ No newline at end of file

db/structure.sql

@@ -98,15 +98,6 @@ BEGIN
 END;
 $$;
 
-CREATE FUNCTION trigger_69523443cc10() RETURNS trigger
-    LANGUAGE plpgsql
-    AS $$
-BEGIN
-  NEW."id_convert_to_bigint" := NEW."id";
-  RETURN NEW;
-END;
-$$;
-
 CREATE FUNCTION trigger_77f5e1d20482() RETURNS trigger
     LANGUAGE plpgsql
     AS $$
@@ -27329,8 +27320,6 @@ CREATE TRIGGER trigger_51ab7cef8934 BEFORE INSERT OR UPDATE ON ci_builds_runner_
 
 CREATE TRIGGER trigger_542d6c2ad72e BEFORE INSERT OR UPDATE ON ci_builds_metadata FOR EACH ROW EXECUTE FUNCTION trigger_542d6c2ad72e();
 
-CREATE TRIGGER trigger_69523443cc10 BEFORE INSERT OR UPDATE ON events FOR EACH ROW EXECUTE FUNCTION trigger_69523443cc10();
-
 CREATE TRIGGER trigger_77f5e1d20482 BEFORE INSERT OR UPDATE ON deployments FOR EACH ROW EXECUTE FUNCTION trigger_77f5e1d20482();
 
 CREATE TRIGGER trigger_8485e97c00e3 BEFORE INSERT OR UPDATE ON ci_sources_pipelines FOR EACH ROW EXECUTE FUNCTION trigger_8485e97c00e3();