DO $$DECLARE this_version CONSTANT varchar := '00.01.009'; BEGIN PERFORM * FROM "DBVersion" WHERE version = this_version; IF FOUND THEN RETURN; END IF; DROP TABLE public."DatasetProfileViewstyle"; DROP TABLE public."DatasetProfileRuleset"; INSERT INTO public."DBVersion" VALUES ('DMPDB', '00.01.009', '2023-10-27 12:00:00.000000+02', now(), 'Drop old dataset related tables.'); END$$;