php - PDO multiple queries

Question

As of PHP version 5.3 PDO_MYSQL driver has been repleaced in favour of PDO_MYSQLND. It introduced support for multiple queries.

Though, I can't figure out how to get both result sets if more than one SELECT query has been passed. Both queries have been executed, it can't be that the second one was just dumped.

$db->query("SELECT 1; SELECT 2;")->fetchAll(PDO::FETCH_ASSOC);

Returns:

array(1) {
  [0]=>
  array(1) {
    [1]=>
    string(1) "1"
  }
}

Answer 1

It turns out that you need to use PDOStatement::nextRowset.

$stmt   = $db->query("SELECT 1; SELECT 2;");
$stmt->nextRowset();
var_dump( $stmt->fetchAll(PDO::FETCH_ASSOC) );

This will return result for the second query.

It is a bit odd implementation. It would certainly be easier if multi-query statement would just return both results sets under one array. However, the advantage is that this implementation allows to fetch every query using different FETCH styles.