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Bug #34625 Scrollable cursor doesn't work with MySQL
Submitted: 2005-09-24 06:35 UTC Modified: 2005-10-12 20:08 UTC
Votes:2
Avg. Score:5.0 ± 0.0
Reproduced:2 of 2 (100.0%)
Same Version:2 (100.0%)
Same OS:0 (0.0%)
From: stewey at ambitious dot ca Assigned: wez (profile)
Status: Not a bug Package: PDO related
PHP Version: 5CVS-2005-09-25 (snap) OS: Mac OS X 10.4.2
Private report: No CVE-ID: None
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 [2005-09-24 06:35 UTC] stewey at ambitious dot ca 
Description:
------------
Preparing a statement with the PDO_ATTR_CURSOR => 
PDO_CURSOR_SCROLL driver option doesn't work with MySQL.

Reproduce code:
---------------
$PDO = new PDO(  
	"mysql:dbname=test;host=127.0.0.1", 
	'user', 'pass' );
$statement = $PDO->prepare("select id from table", 
	array(PDO_ATTR_CURSOR => PDO_CURSOR_SCROLL) );
$statement->execute();
print_r($statement->fetch( PDO_FETCH_ASSOC,  
   PDO_FETCH_ORI_ABS, 1 ));
print_r($statement->fetch( PDO_FETCH_ASSOC, 
   PDO_FETCH_ORI_ABS, 1 ));
exit;


Expected result:
----------------
I would expect to see the same row output twice. If this is 
not a support driver option, then I would expect and error or 
exception thrown (yes, exceptions are enabled).

Actual result:
--------------
Two different rows. The PDO_FETCH_ORI_ABS arguments are 
seemingly ignored.

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 [2005-09-24 13:36 UTC] sniper@php.net 
Please try using this CVS snapshot:

  http://snaps.php.net/php5-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5-win32-latest.zip
 [2005-09-24 23:46 UTC] stewey at ambitious dot ca 
Thanks for the info. Constant problem resolved, but the 
scrollable cursor problem remains. New repro code:

$PDO = new PDO(  
	"mysql:dbname=test;host=127.0.0.1", 
	'user', 'pass' );
$statement = $PDO->prepare("select id from table", 
	array(PDO::ATTR_CURSOR => PDO::CURSOR_SCROLL) );
$statement->execute();
print_r($statement->fetch( PDO::FETCH_ASSOC,  
   PDO::FETCH_ORI_ABS, 1 ));
print_r($statement->fetch( PDO::FETCH_ASSOC, 
   PDO::FETCH_ORI_ABS, 1 ));
exit;
 [2005-10-12 14:36 UTC] iliaa@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

MySQL does not support cursors and the driver cannot emulate them for you.
 [2005-10-12 20:08 UTC] stewey at ambitious dot ca 
Ok. Perhaps you should throw an exception when we give a 
cursor attribute to a mysql pdo driver. This should also be 
doc'd.
 
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