Description: ------------ The "preg_replace" statement on line 1939 of MDB/QueryTool/Query.php does not work as expected. Specifically, this statement will add extraneous table names to the fields in the GROUP BY statement of a query, if the name of the grouped upon field appears as a column name in the table that is being searched. Test script: --------------- <?php require_once "MDB/QueryTool.php"; $dsn='mysqli://user:pass@localhost/mysql'; $query=new MDB_QueryTool($dsn,NULL,2); $query->setSelect("host, count(distinct user) as NumUsers"); $query->setTable("user"); $query->setGroup("host"); echo $query->getGroup(); echo "<br>"; print_r($query->metadata()); echo $query->getQueryString(); echo "<br>"; print_r($query->execute()); ?> Expected result: ---------------- host SELECT host, count(distinct user) as NumUsers FROM user GROUP BY user.host Actual result: -------------- host SELECT host, count(distinct user) as NumUsers FROM user GROUP BY user.user.host