Bug #60122 [Ver->Dup]: PDO_MYSQL: Many multi-row statements gives wrong result

From: Date: Wed, 09 Dec 2020 15:40:09 +0000
Subject: Bug #60122 [Ver->Dup]: PDO_MYSQL: Many multi-row statements gives wrong result
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=60122&edit=1

 ID:                 60122
 Updated by:         nikic@php.net
 Reported by:        armiksos at gmail dot com
 Summary:            PDO_MYSQL: Many multi-row statements gives wrong
                     result
-Status:             Verified
+Status:             Duplicate
 Type:               Bug
 Package:            PDO MySQL
 Operating System:   windows 7
 PHP Version:        7.3
 Block user comment: N
 Private report:     N

 New Comment:

Same issue as bug #66878, which is now fixed.


Previous Comments:
------------------------------------------------------------------------
[2018-04-20 15:14:22] sladkov at gmail dot com

Still reproduces with PHP 7.1.15 + mysqlnd driver.
Although with PDO::MYSQL_ATTR_USE_BUFFERED_QUERY set to false it works as expected.

------------------------------------------------------------------------
[2011-12-05 09:58:20] armiksos at gmail dot com

I use MySQL driver.

------------------------------------------------------------------------
[2011-12-04 17:59:00] ssufficool@php.net

Which driver are you using (i.e. MySQL, PostgreSQL, DBLIB, SqlServer?)

------------------------------------------------------------------------
[2011-10-24 14:49:39] armiksos at gmail dot com

Description:
------------
If you create two query of multi-row statements in one .php file and you assign 
them 
to the same variable after processing one of them, the second query will give only 
result of only ONE statement.

If you assign the result of query to another variable, the result will be correct.

So    $another_var_name = $conn->query("SELECT 1 as one; SELECT 2 as two; SELECT 3 
as three;");

will work in Test script, otherwise result will be wrong.

Test script:
---------------
               $q = $conn->query("SELECT 1 as one; SELECT 2 as two; SELECT 3 as
three;");
           
                do
                {
                   $r=$q->fetchAll(PDO::FETCH_ASSOC);
                   echo "<br />";
                   print_r($r);       
                   
                }while($q->nextRowset());
                
           
               $q = $conn->query("SELECT 1 as one; SELECT 2 as two; SELECT 3 as
three;");
           
                do
                {
                   $r=$q->fetchAll(PDO::FETCH_ASSOC);
                     echo "<br />";
                   print_r($r);       
                   
                }while($q->nextRowset());   

Expected result:
----------------
Array ( [0] => Array ( [one] => 1 ) )
Array ( [0] => Array ( [two] => 2 ) )
Array ( [0] => Array ( [three] => 3 ) )
Array ( [0] => Array ( [one] => 1 ) )
Array ( [0] => Array ( [two] => 2 ) )
Array ( [0] => Array ( [three] => 3 ) ) 

Actual result:
--------------
Array ( [0] => Array ( [one] => 1 ) )
Array ( [0] => Array ( [two] => 2 ) )
Array ( [0] => Array ( [three] => 3 ) )
Array ( [0] => Array ( [one] => 1 ) ) 


------------------------------------------------------------------------



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Edit this bug report at https://bugs.php.net/bug.php?id=60122&edit=1


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