Fix: not found PruneOrphanedGeoEvents

changelogs/unreleased/30229-gitlab-backgroundmigration-pruneorphanedgeoevents-did-you-mean-prun.yml

+---
+title: "[Geo] Fix: undefined Gitlab::BackgroundMigration::PruneOrphanedGeoEvents"
+merge_request: 19638
+author:
+type: fixed

ee/lib/gitlab/background_migration/prune_orphaned_geo_events.rb

+# frozen_string_literal: true
+
+# This job is added to fix https://gitlab.com/gitlab-org/gitlab/issues/30229
+# It's not used anywhere else.
+# Can be removed in GitLab 13.*
+module Gitlab
+  module BackgroundMigration
+    class PruneOrphanedGeoEvents
+      BATCH_SIZE = 50_000
+      RESCHEDULE_DELAY = 5.minutes
+
+      EVENT_TABLES = %w[geo_repository_created_events
+                        geo_repository_updated_events
+                        geo_repository_deleted_events
+                        geo_repository_renamed_events
+                        geo_repositories_changed_events
+                        geo_hashed_storage_migrated_events
+                        geo_hashed_storage_attachments_events
+                        geo_lfs_object_deleted_events
+                        geo_job_artifact_deleted_events
+                        geo_upload_deleted_events].freeze
+
+      module PrunableEvent
+        extend ActiveSupport::Concern
+        include EachBatch
+
+        included do
+          scope :orphans, -> do
+            where(<<-SQL.squish)
+              NOT EXISTS (
+                SELECT 1
+                FROM geo_event_log
+                WHERE geo_event_log.#{geo_event_foreign_key} = #{table_name}.id
+              )
+              SQL
+          end
+        end
+
+        class_methods do
+          def geo_event_foreign_key
+            table_name.singularize.sub(/^geo_/, '') + '_id'
+          end
+
+          def delete_batch_of_orphans!
+            deleted = where(id: orphans.limit(BATCH_SIZE)).delete_all
+
+            vacuum! if deleted.positive?
+
+            deleted
+          end
+
+          def vacuum!
+            connection.execute("VACUUM #{table_name}")
+          rescue ActiveRecord::StatementInvalid => e
+            # ignore timeout, auto-vacuum will take care of it
+            raise unless e.message =~ /statement timeout/i
+          end
+        end
+      end
+
+      def perform(table_name = EVENT_TABLES.first)
+        return if Gitlab::Database.read_only?
+
+        deleted_rows = prune_orphaned_rows(table_name)
+        table_name   = next_table(table_name) if deleted_rows.zero?
+
+        BackgroundMigrationWorker.perform_in(RESCHEDULE_DELAY, self.class.name, table_name) if table_name
+      end
+
+      def prune_orphaned_rows(table)
+        event_model(table).delete_batch_of_orphans!
+      end
+
+      def event_model(table)
+        Class.new(ActiveRecord::Base) do
+          include PrunableEvent
+
+          self.table_name = table
+        end
+      end
+
+      def next_table(table_name)
+        return if EVENT_TABLES.last == table_name
+
+        index = EVENT_TABLES.index(table_name)
+
+        return unless index
+
+        EVENT_TABLES[index + 1]
+      end
+    end
+  end
+end