Edit report at https://bugs.php.net/bug.php?id=42765&edit=1
ID: 42765
Comment by: andreas at codejungle dot org
Reported by: sms at inbox dot ru
Summary: PDO ODBC: Long binary field in query result crashes
PHP ("Out of memory" error)
Status: Open
Type: Bug
Package: PDO related
Operating System: Windows 2000 SP4
PHP Version: 5.2.4
Block user comment: N
Private report: N
New Comment:
Bug is still existing in PHP 5.3.5 (os ubuntu natty)
The chunk workaround from skettler is working, but 22 000 queries for a 40 MB
file is not optimal.
I tried also the php-ds-odbc_blob.patch, and the "Out of memory" error was gone,
but for some reasons, now the files are twice as large :(
Previous Comments:
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[2010-06-20 17:43:42] [email protected]
hm, I don't maintain odbc.
However I would suggest SqlServer users on Windows to use SqlSrv instead, much
more stable and features complete.
------------------------------------------------------------------------
[2009-04-29 10:44:33] [email protected]
Confirmed not fixed with latest PHP 5.2 snapshot VC6 x86 Thread Safe
(2009-Apr-27 00:00:00):
Fatal error: Out of memory (allocated 262144) (tried to allocate 4294967295
bytes)
Current workaround is getting the length of the image, retrieving chunks of
4096 characters and putting them back together in PHP.
SQL-Queries for this workaround look like these:
SELECT DATALENGTH(imagefield) AS imagelength FROM imagetable WHERE imageid
= ?
SELECT CAST(SUBSTRING(imagefield, offset, length) AS VARCHAR(4096)) AS
imagechunk FROM imagetable WHERE imageid = ?
------------------------------------------------------------------------
[2009-04-25 14:50:26] [email protected]
Please try using this CVS snapshot:
http://snaps.php.net/php5.2-latest.tar.gz
For Windows:
http://windows.php.net/snapshots/
------------------------------------------------------------------------
[2008-10-03 21:41:35] [email protected]
Thanks for the patches and testing.
About compiling php on windows, take a look here:
http://wiki.php.net/internals/windows
------------------------------------------------------------------------
[2008-10-03 15:34:14] jeffreybolle at gmail dot com
I had the same problem recently. I'd like to thank csa for the great source
code patch. Recompiling the source under windows wasn't easy and it took me
many hours to piece together all the software and libraries required. The
result was a fixed extension that can access large blob files, this has been
tested under Windows Vista 32bit.
I thought I'd post a link for the compiled extension (PHP 5.2.6) in case any
other windows users want to make use of this fix without going through the
hassle of learning how to compile PHP from source.
http://s3.paramorphicdesigns.com/random/php/php_pdo_odbc.dll
If there are any problems feel free to contact me at [email protected]
Jeffrey
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