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Bug #79664 PDOStatement::getColumnMeta fails on empty result set
Submitted: 2020-06-02 00:23 UTC Modified: 2020-06-02 07:39 UTC
From: mic at kwayisi dot org Assigned: cmb (profile)
Status: Closed Package: PDO SQLite
PHP Version: 7.4.6 OS: Windows
Private report: No CVE-ID: None
 [2020-06-02 00:23 UTC] mic at kwayisi dot org
Description:
------------
PDOStatement::getColumnMeta throws a "column index out of range" error if the result set is empty.

After calling PDOStatement::columnCount to confirm that there are columns in the result set, subsequent call to PDOStatement::getColumnMeta shouldn't produce an error even if its implementation does not enable it to fetch the requested column (because there are no rows).

Test script:
---------------
$pdo = new PDO('sqlite:', null, null, [
	PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
]);
$stmt = $pdo->query('select 1 where 0');
if ($stmt->columnCount())
	var_dump($stmt->getColumnMeta(0));


Expected result:
----------------
array(6) {
  ["native_type"]=>
  string(7) "integer"
  ["flags"]=>
  array(0) {
  }
  ["name"]=>
  string(1) "1"
  ["len"]=>
  int(4294967295)
  ["precision"]=>
  int(0)
  ["pdo_type"]=>
  int(2)
}

Actual result:
--------------
ERROR: SQLSTATE[HY000]: General error: 25 column index out of range


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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2020-06-02 07:39 UTC] cmb@php.net
-Summary: PDOStatement::getColumnMeta should fail predictably for an empty result set +Summary: PDOStatement::getColumnMeta fails on empty result set -Status: Open +Status: Verified -Assigned To: +Assigned To: cmb
 [2020-06-02 07:55 UTC] cmb@php.net
The following pull request has been associated:

Patch Name: Fix #79664: PDOStatement::getColumnMeta fails on empty result set
On GitHub:  https://github.com/php/php-src/pull/5654
Patch:      https://github.com/php/php-src/pull/5654.patch
 [2020-06-02 08:48 UTC] cmb@php.net
Automatic comment on behalf of cmbecker69@gmx.de
Revision: http://git.php.net/?p=php-src.git;a=commit;h=63bd8f38f4b7e8ffbcbd0ea607e21041ebba2455
Log: Fix #79664: PDOStatement::getColumnMeta fails on empty result set
 [2020-06-02 08:48 UTC] cmb@php.net
-Status: Verified +Status: Closed
 
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