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Bug #62215 ODBC: ms access memo field causes cli abend
Submitted: 2012-06-03 14:48 UTC Modified: 2020-10-11 04:22 UTC
Avg. Score:4.6 ± 0.7
Reproduced:8 of 8 (100.0%)
Same Version:2 (25.0%)
Same OS:6 (75.0%)
From: ned at cop dot ufl dot edu Assigned: cmb (profile)
Status: No Feedback Package: PDO ODBC
PHP Version: 5.4.3 OS: windows
Private report: No CVE-ID: None
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 [2012-06-03 14:48 UTC] ned at cop dot ufl dot edu
this problem was first noticed with 5.4.1; 5.4.0 works fine.

i am using PDO to read a ms access database with a memo field, at the command line interface. i created a test database with one table and one field of type memo and one record. if the text in that field is 255 chars of less, all is well. between 256 and 259 php returns scrambled data. at 260 it gives "zend mm heap corrupted". at 261 CLI blows up.

Test script:

$dbq = "test.mdb";
$sql = "SELECT * FROM table1";
$pdo = new PDO("odbc:Driver={Microsoft Access Driver (*.mdb)};Dbq=$dbq;");
$result = $pdo->query($sql,PDO::FETCH_ASSOC);
foreach ($result as $row)
   echo $row['COMMENT'] . "\n";


Expected result:
the script should return whatever chars are in the memo field, up to 65536 max. instead it only handles 255 chars as if it were a text field.

Actual result:
between 256 and 259 returns scrambled data. at 260 gives "zend mm heap corrupted". a 261 CLI blows up.


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 [2013-06-12 04:52 UTC]
-Summary: ms access memo field causes cli abend +Summary: ODBC: ms access memo field causes cli abend
 [2014-01-01 12:37 UTC]
-Package: PDO related +Package: PDO ODBC
 [2020-09-28 08:51 UTC]
-Status: Open +Status: Feedback -Assigned To: +Assigned To: cmb
 [2020-09-28 08:51 UTC]
I cannot reproduce the reported behavior.  If you still experience
this misbehavior with any of the actively supported PHP
versions[1], please provide the Access database for download
somewhere on the Web.

[1] <>
 [2020-10-11 04:22 UTC] php-bugs at lists dot php dot net
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.
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