1 files changed, 55 insertions, 0 deletions
diff --git a/db/post_migrate/20210722155635_finalize_convert_geo_job_artifact_deleted_events_bigint.rb b/db/post_migrate/20210722155635_finalize_convert_geo_job_artifact_deleted_events_bigint.rb
new file mode 100644
index 00000000000..7d3809a9dbe
--- /dev/null
+++ b/db/post_migrate/20210722155635_finalize_convert_geo_job_artifact_deleted_events_bigint.rb
@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+class FinalizeConvertGeoJobArtifactDeletedEventsBigint < ActiveRecord::Migration[6.1]
+  include Gitlab::Database::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  TABLE_NAME = 'geo_job_artifact_deleted_events'
+  COLUMN_NAME = 'job_artifact_id'
+  COLUMN_NAME_CONVERTED = "#{COLUMN_NAME}_convert_to_bigint"
+
+  def up
+    ensure_batched_background_migration_is_finished(
+      job_class_name: 'CopyColumnUsingBackgroundMigrationJob',
+      table_name: TABLE_NAME,
+      column_name: 'id',
+      job_arguments: [[COLUMN_NAME], [COLUMN_NAME_CONVERTED]]
+    )
+
+    swap
+  end
+
+  def down
+    swap
+  end
+
+  def swap
+    old_index_name = 'index_geo_job_artifact_deleted_events_on_job_artifact_id'
+
+    bigint_index_name = 'index_geo_job_artifact_deleted_events_on_job_artifact_id_bigint'
+    add_concurrent_index TABLE_NAME, COLUMN_NAME_CONVERTED, name: bigint_index_name
+
+    with_lock_retries(raise_on_exhaustion: true) do
+      execute("LOCK TABLE #{TABLE_NAME} IN ACCESS EXCLUSIVE MODE")
+
+      temp_name = quote_column_name("#{COLUMN_NAME}_tmp")
+      old_column_name = quote_column_name(COLUMN_NAME)
+      new_column_name = quote_column_name(COLUMN_NAME_CONVERTED)
+
+      execute "ALTER TABLE #{TABLE_NAME} RENAME COLUMN #{old_column_name} TO #{temp_name}"
+      execute "ALTER TABLE #{TABLE_NAME} RENAME COLUMN #{new_column_name} TO #{old_column_name}"
+      execute "ALTER TABLE #{TABLE_NAME} RENAME COLUMN #{temp_name} TO #{new_column_name}"
+
+      change_column_default TABLE_NAME, COLUMN_NAME, nil
+      change_column_default TABLE_NAME, COLUMN_NAME_CONVERTED, 0
+
+      function_name = Gitlab::Database::UnidirectionalCopyTrigger.on_table(TABLE_NAME).name(COLUMN_NAME, COLUMN_NAME_CONVERTED)
+      execute "ALTER FUNCTION #{quote_table_name(function_name)} RESET ALL"
+
+      execute "DROP INDEX #{old_index_name}"
+
+      rename_index TABLE_NAME, bigint_index_name, old_index_name
+    end
+  end
+end