mySQL - globale Variable?!

[Speedy]

Okay, dazu habe ich folgendes gefunden:

Beginning with MySQL 5.0.19, the type returned by GROUP_CONCAT() is always VARCHAR unless group_concat_max_len is greater than 512, in which case, it returns a BLOB. (Previously, it returned a BLOB with group_concat_max_len greater than 512 only if the query included an ORDER BY  clause.)

Gibt es dafür auch ein Workaraound? :)