|  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login
Doc Bug #71916 Two attribute constants use the same value
Submitted: 2016-03-29 11:34 UTC Modified: 2020-04-07 11:18 UTC
From: downsider84 at hotmail dot com Assigned:
Status: Verified Package: PDO related
PHP Version: 7.0.4 OS: Irrelevant
Private report: No CVE-ID: None
Have you experienced this issue?
Rate the importance of this bug to you:

 [2016-03-29 11:34 UTC] downsider84 at hotmail dot com

Setting MYSQL_ATTR_USE_BUFFERED_QUERY when using the pgsql driver causes a "deprecated" warning about PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT. This is non-obvious and potentially difficult to debug.

Test script:
ini_set("display_errors", 1);

// change credentials as appropriate
$dbName = "test";
$host = "locahost";
$username = "root";
$password = "";

$pdo = new \PDO("pgsql:$dbName=db;host=$host", $username, $password);
$pdo->setAttribute(\PDO:MYSQL_ATTR_USE_BUFFERED_QUERY, true);

Expected result:
Deprecated:  PDO::setAttribute(): PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT is deprecated, use PDO::ATTR_EMULATE_PREPARES instead in [filename] on line [lineno]


Add a Patch

Pull Requests

Add a Pull Request


AllCommentsChangesGit/SVN commitsRelated reports
 [2016-03-29 12:18 UTC]
-Status: Open +Status: Verified
 [2016-03-29 12:18 UTC]
This seems to be a flaw in the design of PDO; Drivers with driver specific attributes are instructed to use the same value "PDO_ATTR_DRIVER_SPECIFIC" (1000) to identify their first specific attribute. 

Any two drivers with driver specific attributes are vulnerable to the same problem.

I am not super familiar with PDO, so, unsure how to fix it ...
 [2016-03-29 13:06 UTC] downsider84 at hotmail dot com
I'm not sure there will be a solution, given the policy of starting driver specific constants at 1000 (I can't think of anything comprehensive), so that only leaves us with documenting the issue

After bit of digging, it looks like if a driver implements custom attributes then it has some disclaimer boilerplate saying not to use the constants with other drivers. However, this is tucked away inside the docs for each driver.
Perhaps we should add something to the docs for getAttribute and setAttribute to make the convention more visible?
 [2017-10-24 08:31 UTC]
-Package: PDO Core +Package: PDO related
 [2020-04-07 11:18 UTC]
-Type: Bug +Type: Documentation Problem
 [2020-04-07 11:18 UTC]
Indeed, doc issue.
PHP Copyright © 2001-2021 The PHP Group
All rights reserved.
Last updated: Sun Oct 17 15:03:34 2021 UTC