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Bug #32997 Warning for seeking to row 0
Submitted: 2005-05-10 11:32 UTC Modified: 2005-05-10 14:35 UTC
From: olafvdspek at gmail dot com Assigned:
Status: Not a bug Package: MySQL related
PHP Version: 5.0.4 OS: Windows 2003
Private report: No CVE-ID: None
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 [2005-05-10 11:32 UTC] olafvdspek at gmail dot com 
Description:
------------
Hi,

PHP emits a bogus warning when you seek to row 0 in an empty result set. Seeking to row 0 is a no-op in an empty set, but should not emit a warning.

Reproduce code:
---------------
<?php
	mysql_connect('localhost', 'xbt', '');
	mysql_select_db('xbt');
	$rows = mysql_query("select 1 from xbt_files where 0 = 1") or die(mysql_error());
	mysql_data_seek($rows, 0);
?>

Expected result:
----------------
No warning

Actual result:
--------------
Warning: mysql_data_seek() [function.mysql-data-seek]: Offset 0 is invalid for MySQL result index 3 (or the query data is unbuffered) in C:\IS\Apache2\htdocs\temp\data_seek.php on line 5

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 [2005-05-10 11:34 UTC] olafvdspek at gmail dot com 
I see the documentation mentions this issue:
> row_number starts at 0. The row_number should be a value in the range from 0 to mysql_num_rows() - 1. However if the result set is empty (mysql_num_rows() == 0), a seek to 0 will fail with a E_WARNING and mysql_data_seek() will return FALSE. 

Why does the seek not work like a normal fseek where you can also seek to the end of the file (after you've read the last byte)?
 [2005-05-10 14:35 UTC] sniper@php.net 
Sorry, but your problem does not imply a bug in PHP itself.  For a
list of more appropriate places to ask for help using PHP, please
visit http://www.php.net/support.php as this bug system is not the
appropriate forum for asking support questions.  Due to the volume
of reports we can not explain in detail here why your report is not
a bug.  The support channels will be able to provide an explanation
for you.

Thank you for your interest in PHP.
 
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