Bug #54986 [Opn->Fbk]: Segmentation fault while executing queries with just one column
Edit report at http://bugs.php.net/bug.php?id=54986&edit=1
ID: 54986
Updated by: felipe@php.net
Reported by: chandra dot madathil at theice dot com
Summary: Segmentation fault while executing queries with just
one column
-Status: Open
+Status: Feedback
Type: Bug
Package: ODBC related
Operating System: Red Hat Linux 5.5,64-bit
PHP Version: 5.2.17
Block user comment: N
Private report: N
New Comment:
Can you run the test on cli using valgrind? If yes, please post the valgrind log.
Previous Comments:
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[2011-06-06 17:15:01] chandra dot madathil at theice dot com
Looks like this error is more widespread than I thought of initially. I am getting this error while
freeing the resultset for some other programs too.
Were you able to reproduce this issue? Our production server migration is delayed due to this issue.
------------------------------------------------------------------------
[2011-06-03 16:49:21] chandra dot madathil at theice dot com
Description:
------------
When the select statement includes only one column, the script crashes with "zend_mm_heap
corrupted" or segmentation fault errors. When we add a dummy column to the select statement,
the script runs successfully. Looks like some data structure initialization bug.
For example,
select name0 from COMPANY where name0 like 'A%'; -- errors out
select name0,1 from COMPANY where name0 like 'A%'; -- runs successfully
Test script:
---------------
<?php
$db_conn = odbc_connect('NZSQL','<username>','<password>')
or alert("Could not connect: " . odbc_error());
echo "Connected successfully!\n";
$query="select name0 from COMPANY where name0 like 'A%' ";
echo "executing ...\n";
$result = odbc_exec($db_conn,$query);
echo "executed query ...\n";
if (!$result) alert("Could not run query: " . odbc_error());
echo "fetching resultset ...\n";
while(odbc_fetch_array($result)) {
$row0 = odbc_result($result, 1);
echo "field1:$row0\n";
}
odbc_close($db_conn);
echo "Completed successfully\n";
function alert($errMsg) {
fwrite(STDERR, "$errMsg\n"); exit(2);
}
?>
Expected result:
----------------
Connected successfully!
executing ...
executed query ...
fetching resultset ...
field1:<company names>
....
Completed successfully
Actual result:
--------------
Connected successfully!
executing ...
zend_mm_heap corrupted
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/bug.php?id=54986&edit=1
Thread (5 messages)