#44171 [Opn->Csd]: PDO->query ('SELECT ...', PDO::FETCH_COLUMN, -1) - error or not?
ID: 44171
Updated by: iliaa@php.net
Reported By: uwendel at mysql dot com
-Status: Open
+Status: Closed
Bug Type: PDO related
Operating System: Linux
PHP Version: 5.3CVS-2008-02-19 (CVS)
New Comment:
This bug has been fixed in CVS.
Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
Thank you for the report, and for helping us make PHP better.
Previous Comments:
------------------------------------------------------------------------
[2008-02-19 14:56:01] uwendel at mysql dot com
Description:
------------
What is PDO->query('SELECT ...', PDO::FETCH_COLUMN, $colno) supposed to
do if you pass an invalid column number in $colno, e.g.:
$stmt = $pdo->query('SELECT only_column FROM test', PDO::FETCH_COLUMN,
-1);
My preference would be to make PDO bail about the invalid offset.
However, I do not know if this would work with all drivers. So, maybe
its even technically not possible to make PDO emit a warning if the
requested column is not available.
In any case, I ask to update the manual and tell people about this edge
case.
Reproduce code:
---------------
nixnutz@ulflinux:~/php53> sapi/cli/php -r '$pdo=new
PDO("sqlite:/tmp/foo.db"); @$pdo->exec("DROP TABLE test");
$pdo->exec("CREATE TABLE test(id INT)"); $pdo->exec("INSERT INTO
test(id) VALUES (1)"); var_dump($pdo->query("SELECT id FROM test",
PDO::FETCH_COLUMN, -1)->fetchAll());'
array(0) {
}
(Same with MySQL)
Expected result:
----------------
If possible, make PDO bail out when calling query() with invalid column
offsets. If that's not possible for technical reasons, please consider
having a note about this in the manual.
------------------------------------------------------------------------
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