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# frozen_string_literal: true
class CreateFunctionGitlabSchemaPreventWrite < Gitlab::Database::Migration[2.0]
TRIGGER_FUNCTION_NAME = 'gitlab_schema_prevent_write'
enable_lock_retries!
# This migration is only to make sure that the lock-write trigger function
# matches what we already have on staging/production for Gitlab.com
def up
execute(<<~SQL)
CREATE OR REPLACE FUNCTION #{TRIGGER_FUNCTION_NAME}()
RETURNS TRIGGER AS
$$
BEGIN
RAISE EXCEPTION 'Table: "%" is write protected within this Gitlab database.', TG_TABLE_NAME
USING ERRCODE = 'modifying_sql_data_not_permitted',
HINT = 'Make sure you are using the right database connection';
END
$$ LANGUAGE PLPGSQL
SQL
end
def down
return if Gitlab.com?
execute(<<~SQL)
DROP FUNCTION #{TRIGGER_FUNCTION_NAME} CASCADE
SQL
end
end
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