Описание ошибки:
undef error - DBD::mysql::st execute failed: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AND right_key <= ORDER BY left_key' at line 1 at /www/magudoch/users/magudoch-bigfish/lib/WebMech/Modules/mod_SQL.pm line 75.