public function toSql()
{
/* fetch by current query */
$query = $this->getCurrentReadQuery();
$dsId = $this->getSchema()->getReadSourceId();
$driver = $this->getQueryDriver($dsId);
$arguments = new ArgumentArray();
$sql = $query->toSql($driver, $arguments);
/*
* FIXME:
foreach($arguments as $name => $value) {
$sql = preg_replace( "/$name\b/", $value, $sql );
}
*/
return $sql;
}