addExtensionSql('UPDATE `{?_MYSQL_PREFIX?}_user_stats` SET `pool_id`=NULL WHERE `pool_id`=0');
addExtensionSql('DELETE LOW_PRIORITY FROM `{?_MYSQL_PREFIX?}_user_stats` WHERE `userid` IS NULL');
addExtensionSql('UPDATE `{?_MYSQL_PREFIX?}_user_stats` SET `pool_id`=NULL WHERE `pool_id`=0');
addExtensionSql('DELETE LOW_PRIORITY FROM `{?_MYSQL_PREFIX?}_user_stats` WHERE `userid` IS NULL');