[#DC-978] Doctrine_Connection_Mssql dies on modifyLimitSubquery every time

In Doctrine_Query:getLimitSubquery() there is a call to Doctrine_Connection_Mssql::modifyLimitSubquery().

public function modifyLimitSubquery(Doctrine_Table $rootTable, $query, $limit = false, $offset = false, $isManip = false)
{
	return $this->modifyLimitQuery($query, $limit, $offset, $isManip, true);
}

This in turn calls Doctrine_Connection_Mssql::modifyLimitQuery() wihtout passing the $queryOrigin parameter:

    public function modifyLimitQuery($query, $limit = false, $offset = false, $isManip = false, $isSubQuery = false, Doctrine_Query $queryOrigin = null)
    {
        if ($limit === false || !($limit > 0)) {
            return $query;
        }

        $orderby = stristr($query, 'ORDER BY');

        if ($offset !== false && $orderby === false) {
            throw new Doctrine_Connection_Exception("OFFSET cannot be used in MSSQL without ORDER BY due to emulation reasons.");
        }
        
        $count = intval($limit);
        $offset = intval($offset);

        if ($offset < 0) {
            throw new Doctrine_Connection_Exception("LIMIT argument offset=$offset is not valid");
        }

        $orderbySql = $queryOrigin->getSqlQueryPart('orderby');
        $orderbyDql = $queryOrigin->getDqlPart('orderby');

        if ($orderby !== false) {
            $orders = $this->parseOrderBy(implode(', ', $queryOrigin->getDqlPart('orderby')));

            for ($i = 0; $i < count($orders); $i++) {
...

From just looking at the above code, the query chokes on the first call to a $queryOrigin method. It seems like there is a lot of missing code here which should work with the $query directly when $queryOrigin is not available...

What is the point of $orderbySql and $orderbyDql variables when they are not used anywhere?

[DC-978] Doctrine_Connection_Mssql dies on modifyLimitSubquery every time Created: 27/Feb/11 Updated: 27/Feb/11
Status:	Open
Project:	Doctrine 1
Component/s:	Connection
Affects Version/s:	1.2.4
Fix Version/s:	None

[DC-978] Doctrine_Connection_Mssql dies on modifyLimitSubquery every time Created: 27/Feb/11 Updated: 27/Feb/11