Meldung von Fehlern

[FunTa]

Derzeit erhalte ich beim SEnden von PNs folgende Meldung:

mySQL error: 1104
The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET SQL_MAX_JOIN_SIZE=# if the SELECT is okay
Query: SELECT u.uid, u.username, u.email, u.usergroup, u.pmnotify, u.pmpopup, u.receivepms, u.ignorelist, u.lastactive, u.language, COUNT(pms.pmid) AS pms_total, g.canusepms, g.pmquota, g.cancp FROM (mybb_users u, mybb_usergroups g) LEFT JOIN mybb_privatemessages pms ON (pms.uid=u.uid) WHERE u.username='banker' AND g.gid=u.usergroup GROUP BY u.uid