Description:
------------
According to the docs, PDO::exec should return the number of rows affected by the INSERT/DELETE/... statement. In my setup (WinXPSP2/Apache 2.0.55/PHP 5.1.0/mysql 4.1.15-nt), int(0) is returned instead always.

Reproduce code:
---------------
// table test has two columns (id and value)
 
$db = new PDO('mysql:host=localhost;dbname=test', 'xxxxx', 'xxxxx');
 
for ($i=1;$i<5;$i++) {
	$count = $db->exec("INSERT INTO TEST (id, value) VALUES ($i, 1)");
 	var_dump($count);
}
 
$count = $db->exec("DELETE FROM test WHERE id>0");
var_dump($count);


Expected result:
----------------
int(1) int(1) int(1) int(1) int(4)

(assuming table test was empty before)

Actual result:
--------------
int(0) int(0) int(0) int(0) int(0)