Req #46575 [Opn->Bgs]: NULL comparison when using "not in" not consistent with Windows SQL

Edit report at https://bugs.php.net/bug.php?id=46575&edit=1 ID: 46575 Updated by: ssufficool@php.net Reported by: ben at thelocust dot org Summary: NULL comparison when using "not in" not consistent with Windows SQL -Status: Open +Status: Bogus Type: Feature/Change Request Package: MSSQL related Operating System: * PHP Version: 5.2.6 Block user comment: N Private report: N New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php Previous Comments: ------------------------------------------------------------------------ [2011-12-01 05:20:03] ssufficool at gmail dot com This is a behavior set by the MSSQL "ANSI NULLS" setting. Depending if ANSI NULLS is on or off, it will return the NULL for the NOT IN selection. This is a server setting, not a PHP setting. Try issuing a "SET ANSI_NULLS ON" before the query using both VBScript and PHP. The behavior should then be the same. ------------------------------------------------------------------------ [2009-01-07 18:17:08] kalle@php.net I don't see the error here, your asking SQL server to return 'test_id' from the table 'test' where 'test_number' doesn't even to 1 or 2, and since NULL is different from 1 and 2 then why shouldn't it be returned? I see that more of a bug in the ASP/VBScript drivers, and I don't think we should put such an inconsistency into because others do it. I changed the category of this to a Feature/Change request, letting the extension maintainer decided whenever to do it or not :) ------------------------------------------------------------------------ [2008-11-14 16:35:50] ben at thelocust dot org Description: ------------ When querying a MSSQL database table, and using the "not in" syntax, PHP's mssql_query will also return rows with NULL in the field specified. Reproduce code: --------------- SQL Server 2000 or 2005 Table "test" test_id (int) test_name (vchar) test_number (int) 1 Foo 1 2 Bar 2 3 <null> 3 4 Baz <null> $sql = "select test_id from test where test_number not in (1,2)"; $res = mssql_query($sql); while ($row = mssql_fetch_array($res)) { ?> <?=$row['test_id'];?><br/> <? } Expected result: ---------------- In PHP, either using FreeTDS on Linux or the MSSQL extension on Windows, the above returns: 3 4 In ASP/VBScript or using Query Analyzer on Windows the following is returned: 3 Windows' MSSQL driver apparently will not compare the "not in" values to a NULL field. PHP, apparently, will. This creates and inconsistency between the two platforms. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=46575&edit=1