#22860 [Opn->Fbk]: odbc_longreadlen() corruption problem

ID: 22860 Updated by: kalowsky@php.net Reported By: truth at ichaos dot com -Status: Open +Status: Feedback Bug Type: ODBC related Operating System: SuSE 8.0 PHP Version: 4.3.2-RC New Comment: Can you try doing something random like changing the CURSOR type to SQL_CURSOR_FORWARD_ONLY? DB2 doesn't like the DYNAMIC CURSOR used by PHP for some reason, and I wonder if thats the case. I'm unable to reproduce this behavior here locally though, so it might just be a DB2 specific problem. Previous Comments: ------------------------------------------------------------------------ [2003-03-25 00:07:46] truth at ichaos dot com Actually I tried this with a string that was 28968 chars long, and this it was actually 16388 chars long instead of 2000000. The characters beyond 4096 were corrupted. Sorry for the exagerated numbers. ------------------------------------------------------------------------ [2003-03-24 23:52:36] truth at ichaos dot com All right, this snapshot didn't work. It's hard to write a script but here is a good try: First, a table in my IBM DB2 is created CREATE TABLE test ( ID INT, DATA CLOB(1M)); Put a string in the CLOB that is greater than 5K, and and ID = 1 or so. All right, now the script <? $linkid = odbc_connect("DBNAME", "USER", "PASSWORD"); $result = odbc_exec($linkid, "SELECT data FROM test WHERE id = 1"); odbc_longreadlen($result, 2000000); odbc_binmode($result, ODBC_BINMODE_PASSTHRU); $result = odbc_result($this->result, 1) echo strlen($result); ?> This should return the length of your string. If the odbc.defaultlrl is set to 4096, the string is 2000000 chars long. If odbc.defaultlrl is set to 2000000, the string is the correct length. ------------------------------------------------------------------------ [2003-03-24 23:20:19] kalowsky@php.net And can you provide a script sample, and sample schema for me to use in testing? ------------------------------------------------------------------------ [2003-03-24 17:31:15] sniper@php.net Please try using this CVS snapshot: http://snaps.php.net/php4-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-STABLE-latest.zip ------------------------------------------------------------------------ [2003-03-24 15:01:56] truth at ichaos dot com When odbc.defaultlrl is set to 4096 in the php.ini file, and I call odbc_longreadlen($result, 2000000); in my script, the data returned for that $result is padded at the end with garbage (prolly from memory). When the odbc.defaultlrl is set to 2000000 in the php.ini file, and I call odbc_longreadlen($result, 2000000); in my script, the data returned for that $result is not padded at the end with garbage, and is just fine. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=22860&edit=1