1 files changed, 54 insertions, 0 deletions
diff --git a/db/post_migrate/20230908033511_swap_columns_for_ci_pipeline_chat_data_pipeline_id_bigint.rb b/db/post_migrate/20230908033511_swap_columns_for_ci_pipeline_chat_data_pipeline_id_bigint.rb
new file mode 100644
index 00000000000..4ec9ecc5af7
--- /dev/null
+++ b/db/post_migrate/20230908033511_swap_columns_for_ci_pipeline_chat_data_pipeline_id_bigint.rb
@@ -0,0 +1,54 @@
+# frozen_string_literal: true
+
+class SwapColumnsForCiPipelineChatDataPipelineIdBigint < Gitlab::Database::Migration[2.1]
+  disable_ddl_transaction!
+
+  TABLE_NAME = :ci_pipeline_chat_data
+  TARGET_TABLE_NAME = :ci_pipelines
+  TRIGGER_FUNCTION_NAME = :trigger_239c8032a8d6
+  COLUMN_NAME = :pipeline_id
+  BIGINT_COLUMN_NAME = :pipeline_id_convert_to_bigint
+  LEGACY_FK_NAME = :fk_rails_64ebfab6b3
+  FK_NAME = :fk_64ebfab6b3
+  BIGINT_FK_NAME = :fk_5b21bde562
+
+  def up
+    swap
+  end
+
+  def down
+    swap
+  end
+
+  private
+
+  def swap
+    with_lock_retries(raise_on_exhaustion: true) do
+      # Lock the tables involved.
+      execute "LOCK TABLE #{TARGET_TABLE_NAME}, #{TABLE_NAME} IN ACCESS EXCLUSIVE MODE"
+
+      # Rename the columns to swap names
+      temp_name = "temp_#{COLUMN_NAME}"
+      rename_column TABLE_NAME, COLUMN_NAME, temp_name # rubocop:disable Migration/WithLockRetriesDisallowedMethod
+      rename_column TABLE_NAME, BIGINT_COLUMN_NAME, COLUMN_NAME # rubocop:disable Migration/WithLockRetriesDisallowedMethod
+      rename_column TABLE_NAME, temp_name, BIGINT_COLUMN_NAME # rubocop:disable Migration/WithLockRetriesDisallowedMethod
+
+      # Reset the trigger function
+      execute "ALTER FUNCTION #{quote_column_name(TRIGGER_FUNCTION_NAME)} RESET ALL"
+
+      # Swap the defaults
+      change_column_default TABLE_NAME, COLUMN_NAME, nil
+      change_column_default TABLE_NAME, BIGINT_COLUMN_NAME, 0
+
+      # Swap fkey constraint
+      if foreign_key_exists?(TABLE_NAME, name: LEGACY_FK_NAME)
+        execute "ALTER TABLE #{TABLE_NAME} RENAME CONSTRAINT #{LEGACY_FK_NAME} TO #{FK_NAME}"
+      end
+
+      temp_fk_name = "temp_#{FK_NAME}"
+      execute "ALTER TABLE #{TABLE_NAME} RENAME CONSTRAINT #{FK_NAME} TO #{temp_fk_name}"
+      execute "ALTER TABLE #{TABLE_NAME} RENAME CONSTRAINT #{BIGINT_FK_NAME} TO #{FK_NAME}"
+      execute "ALTER TABLE #{TABLE_NAME} RENAME CONSTRAINT #{temp_fk_name} TO #{BIGINT_FK_NAME}"
+    end
+  end
+end