Brug SHOW OPEN TABLES
:http://dev.mysql.com/ doc/refman/5.1/da/show-open-tables.html
Du kan gøre sådan noget her
SHOW OPEN TABLES WHERE `Table` LIKE '%[TABLE_NAME]%' AND `Database` LIKE '[DBNAME]' AND In_use > 0;
for at kontrollere eventuelle låste tabeller i en database.