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fixes #290

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This commit is contained in:
zYne 2007-03-18 18:38:00 +00:00
parent 24abb16c75
commit 0040261fb8
1 changed files with 26 additions and 35 deletions
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61
lib/Doctrine/Connection/Mssql.php
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@ -97,42 +97,33 @@ class Doctrine_Connection_Mssql extends Doctrine_Connection
public function modifyLimitQuery($query, $limit, $offset, $isManip = false)
{
if ($limit > 0) {
// we need the starting SELECT clause for later
$select = 'SELECT ';
if (preg_match('/^[[:space:]*SELECT[[:space:]]*DISTINCT/i', $query, $matches) == 1) {
$select .= 'DISTINCT ';
$count = intval($limit);
$offset = intval($offset);
if ($offset < 0) {
throw new Zend_Db_Adapter_Exception("LIMIT argument offset=$offset is not valid");
}
$length = strlen($select);
// is there an offset?
if (! $offset) {
// no offset, it's a simple TOP count
return $select . ' TOP ' . $limit . substr($query, $length);
$orderby = stristr($sql, 'ORDER BY');
if ($orderby !== false) {
$sort = (stripos($orderby, 'desc') !== false) ? 'desc' : 'asc';
$order = str_ireplace('ORDER BY', '', $orderby);
$order = trim(preg_replace('/ASC|DESC/i', '', $order));
}
// the total of the count **and** the offset, combined.
// this will be used in the "internal" portion of the
// hacked-up statement.
$total = $limit + $offset;
// build the "real" order for the external portion.
$order = implode(',', $parts['order']);
// build a "reverse" order for the internal portion.
$reverse = $order;
$reverse = str_ireplace(" ASC", " \xFF", $reverse);
$reverse = str_ireplace(" DESC", " ASC", $reverse);
$reverse = str_ireplace(" \xFF", " DESC", $reverse);
// create a main statement that replaces the SELECT
// with a SELECT TOP
$main = $select . ' TOP ' . $total . substr($query, $length);
// build the hacked-up statement.
// do we really need the "as" aliases here?
$query = 'SELECT * FROM ('
. 'SELECT TOP ' . $count . ' * FROM (' . $main . ') AS select_limit_rev ORDER BY '. $reverse
. ') AS select_limit ORDER BY ' . $order;
$sql = preg_replace('/^SELECT\s/i', 'SELECT TOP ' . ($count+$offset) . ' ', $sql);
$sql = 'SELECT * FROM (SELECT TOP ' . $count . ' * FROM (' . $sql . ') AS inner_tbl';
if ($orderby !== false) {
$sql .= ' ORDER BY ' . $order . ' ';
$sql .= (stripos($sort, 'asc') !== false) ? 'DESC' : 'ASC';
}
$sql .= ') AS outer_tbl';
if ($orderby !== false) {
$sql .= ' ORDER BY ' . $order . ' ' . $sort;
}
return $sql;
}
@ -145,7 +136,7 @@ class Doctrine_Connection_Mssql extends Doctrine_Connection
* @return mixed array/string with version information or MDB2 error object
*/
public function getServerVersion($native = false)
{
{
if ($this->serverInfo) {
$serverInfo = $this->serverInfo;
} else {