delete perf from /test/memdbexpired /** onerror(continue,`not exist`,`not find`,`not found`) **/ ; delete performance from /test/memdbexpired /** onerror(continue,`not exist`,`not find`,`not found`) **/ ; delete from /test/memdbexpired with version /** onerror(continue,`not exist`,`not find`,`not found`) **/ ; drop class if exists /test/memdbexpired ;