function exec($query)
    {
        $conn = $this->getConn();
        $sql = $conn->quote($query);
        return $conn->exec($sql);
    }
function exec($query)
    {
        $conn = $this->getConn();
        $sql = $conn->quote($query);
        return $conn->exec($sql);
    }
function exec ( $ query ) { $ conn = $ this -> getConn ( ) ; $ sql = $ conn -> quote ( $ query ) ; return $ conn -> exec ( $ sql ) ; }
Execute an SQL statement and return the number of affected rows
@param string $query
@return int|false
Execute an SQL statement and return the number of affected rows