#39892 [Com]: fetch_fields / fetch_field_direct
ID: 39892
Comment by: ceabear at gmx dot de
Reported By: migues at email dot cz
Status: No Feedback
Bug Type: MySQLi related
Operating System: Win XP Pro SP2
PHP Version: 5.2.0
New Comment:
Here is a quick example code for the original bug report,
it should print the column name and its defined default value for the
column.
<?php
$sql="CREATE TABLE fetchfield (
id int(11) NOT NULL auto_increment,
product varchar(11) collate latin1_german1_ci NOT NULL default
'standard',
test int(11) default '3',
nullable int(11) default NULL,
PRIMARY KEY (id)
) ENGINE=MyISAM;";
$con=mysqli_connect('localhost','username','password','test');
mysqli_query($con,$sql);
$res=mysqli_query($con,"SELECT * FROM test.fetchfield");
$metas=mysqli_fetch_fields($res);
foreach($metas as $meta)
{
echo 'default for '.$meta->name.' is:';
var_dump($meta->def);
echo '<br>';
}
?>
this creates a simple test table with some fields, which get default
values by definition.
as a result I get:
default for id is:string(0) ""
default for product is:string(0) ""
default for test is:string(0) ""
default for nullable is:string(0) ""
the column names are printed ($meta-name) but the default value
($meta->def) is always an empty string.
expected output is:
default for id is:string(0) ""
default for product is:string(0) "standard"
default for test is:string(0) "3"
default for nullable is:string(0) null
it looks like the default value is always an empty string instead of
data out of the database.
looking into the source of php, a null value would be never returned
(because of the source code).
I tried to find out, if this could be a problem of the c-api of mysql,
but didn't find a fitting bug entry on mysql.
maybe this helps to understand the problem?
I used mysql version 5.0.21-community-nt-log on Windows 2000 SP4 and
PHP 5.2.0 for testing
Previous Comments:
------------------------------------------------------------------------
[2006-12-27 01:00:00] php-bugs at lists dot php dot net
No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
------------------------------------------------------------------------
[2006-12-19 22:21:26] tony2001@php.net
It might become really simple as soon as I get what you're talking
about.
At the moment I don't get it, sorry.
------------------------------------------------------------------------
[2006-12-19 21:56:49] migues at email dot cz
Hey guys!
Sorry I'm quite novice so it would took me long time to reproduce step
by step creation a.s.o.
But it's simple :
def $res->fetch_fields(); in returns always null! I guess it will work
always the same on other mysql 5.0... with mysqli_result object
------------------------------------------------------------------------
[2006-12-19 21:37:20] tony2001@php.net
Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves.
A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external
resources such as databases, etc. If the script requires a
database to demonstrate the issue, please make sure it creates
all necessary tables, stored procedures etc.
Please avoid embedding huge scripts into the report.
------------------------------------------------------------------------
[2006-12-19 21:23:11] migues at email dot cz
Description:
------------
MySQL version: 5.0.27
def column for fetch_fields / fetch_field_direct is empty even if
default values are set
Reproduce code:
---------------
$arrfields=$res->fetch_fields();
for ($i=0;$i<$res->field_count;$i++)
{
// /*OR */ foreach ($arrfields as $arrname=>$arrfld)
//{
$arrfld=$res->fetch_field_direct($i);
$fldinfo->appendChild($fldNode=$this->DOM->createElement(dbtag_field));
$fldNode->setAttribute(dbtag_fieldname,$arrfld->name);
$fldNode->setAttribute(dbtag_fieldorgname,$arrfld->orgname);
foreach($arrfld as $key=>$val)
{
$fldNode->appendChild($this->DOM->createElement($key,$val));
}};
Expected result:
----------------
<name>fieldname</name>
....
<def>default _ value</def>
....
Actual result:
--------------
<name>fieldname</name>
....
<def></def>
....
------------------------------------------------------------------------
--
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Thread (7 messages)