#50147 [Fbk-Opn]: DEFAULT NULL Values in mysql_query('SHOW COLUMNS FROM `xx`');
ID: 50147
User updated by: w at lder dot de
Reported By: w at lder dot de
-Status: Feedback
+Status: Open
Bug Type: MySQL related
Operating System: Linux 2.6.16.21-0.25-default
PHP Version: 5.2.11
New Comment:
set Status to open
Previous Comments:
[2009-11-11 11:28:23] w at lder dot de
Here is the result:
mysql SHOW COLUMNS FROM test;
++--+--+-+-+---+
| Field | Type | Null | Key | Default | Extra |
++--+--+-+-+---+
| hereIsDefaultNULL | int(255) | YES | | NULL| |
| defaultNULLvarchar | varchar(255) | YES | | NULL| |
++--+--+-+-+---+
[2009-11-11 10:44:06] u...@php.net
ext/mysql returns whatever MySQL delivers. Please verify that the MySQL
prompt returns the result you want. If not, this is a MySQL bug not a
PHP bug.
Please run on the command line:
mysql -uuser -ppassword database...
mysql SHOW COLUMNS FROM mytable
[2009-11-11 10:35:02] w at lder dot de
Description:
The attached Code results a wrong result.
MySQL:
Server Version: 5.0.26
MySQL-Client-Version: 5.0.26
Reproduce code:
---
?php
/*
MySQL:
CREATE TABLE IF NOT EXISTS `test` (
`hereIsDefaultNULL` int(255) default NULL,
`defaultNULLvarchar` varchar(255) default NULL
)
*/
mysql_connect('localhost','user','');
mysql_select_db('test');
$columns_res = mysql_query('SHOW COLUMNS FROM `test`');
while ($fieldRow = mysql_fetch_assoc($columns_res)) {
print_r($fieldRow) ;
}
?
Expected result:
Array
(
[Field] = hereIsDefaultNULL
[Type] = int(255)
[Null] = YES
[Key] =
[Default] = NULL
[Extra] =
)
Array
(
[Field] = defaultNULLvarchar
[Type] = varchar(255)
[Null] = YES
[Key] =
[Default] = NULL
[Extra] =
)
Actual result:
--
Array
(
[Field] = hereIsDefaultNULL
[Type] = int(255)
[Null] = YES
[Key] =
[Default] =
[Extra] =
)
Array
(
[Field] = defaultNULLvarchar
[Type] = varchar(255)
[Null] = YES
[Key] =
[Default] =
[Extra] =
)
--
Edit this bug report at http://bugs.php.net/?id=50147edit=1
#50147 [Bgs]: DEFAULT NULL Values in mysql_query('SHOW COLUMNS FROM `xx`');
ID: 50147
User updated by: w at lder dot de
Reported By: w at lder dot de
Status: Bogus
Bug Type: MySQL related
Operating System: Linux 2.6.16.21-0.25-default
PHP Version: 5.2.11
New Comment:
OK, but how can I get the value NULL?
I think it is an difference between NULL and .
Any idea?
Another Example:
?php
/*
Mysql:
CREATE TABLE IF NOT EXISTS `test` (
`hereIsDefaultNULL` int(255) default NULL,
`defaultEmptyvarchar` varchar(255) NOT NULL default ''
)
*/
mysql_connect('localhost','root','');
mysql_select_db('test');
$columns_res = mysql_query('SHOW COLUMNS FROM `test`');
while ($fieldRow = mysql_fetch_assoc($columns_res)) {
if ($fieldRow['Default'] == NULL) {
echo $fieldRow['Field'] . ' is NULL /br';
}
}
?
Expected result:
hereIsDefaultNULL is NULL
Actual result:
--
hereIsDefaultNULL is NULL
defaultEmptyvarchar is NULL
Previous Comments:
[2009-11-12 08:38:18] j...@php.net
Replace print_r() with var_dump() and prepare for surprise.
[2009-11-11 11:28:23] w at lder dot de
Here is the result:
mysql SHOW COLUMNS FROM test;
++--+--+-+-+---+
| Field | Type | Null | Key | Default | Extra |
++--+--+-+-+---+
| hereIsDefaultNULL | int(255) | YES | | NULL| |
| defaultNULLvarchar | varchar(255) | YES | | NULL| |
++--+--+-+-+---+
[2009-11-11 10:44:06] u...@php.net
ext/mysql returns whatever MySQL delivers. Please verify that the MySQL
prompt returns the result you want. If not, this is a MySQL bug not a
PHP bug.
Please run on the command line:
mysql -uuser -ppassword database...
mysql SHOW COLUMNS FROM mytable
[2009-11-11 10:35:02] w at lder dot de
Description:
The attached Code results a wrong result.
MySQL:
Server Version: 5.0.26
MySQL-Client-Version: 5.0.26
Reproduce code:
---
?php
/*
MySQL:
CREATE TABLE IF NOT EXISTS `test` (
`hereIsDefaultNULL` int(255) default NULL,
`defaultNULLvarchar` varchar(255) default NULL
)
*/
mysql_connect('localhost','user','');
mysql_select_db('test');
$columns_res = mysql_query('SHOW COLUMNS FROM `test`');
while ($fieldRow = mysql_fetch_assoc($columns_res)) {
print_r($fieldRow) ;
}
?
Expected result:
Array
(
[Field] = hereIsDefaultNULL
[Type] = int(255)
[Null] = YES
[Key] =
[Default] = NULL
[Extra] =
)
Array
(
[Field] = defaultNULLvarchar
[Type] = varchar(255)
[Null] = YES
[Key] =
[Default] = NULL
[Extra] =
)
Actual result:
--
Array
(
[Field] = hereIsDefaultNULL
[Type] = int(255)
[Null] = YES
[Key] =
[Default] =
[Extra] =
)
Array
(
[Field] = defaultNULLvarchar
[Type] = varchar(255)
[Null] = YES
[Key] =
[Default] =
[Extra] =
)
--
Edit this bug report at http://bugs.php.net/?id=50147edit=1
#50147 [Bgs]: DEFAULT NULL Values in mysql_query('SHOW COLUMNS FROM `xx`');
ID: 50147
User updated by: w at lder dot de
Reported By: w at lder dot de
Status: Bogus
Bug Type: MySQL related
Operating System: Linux 2.6.16.21-0.25-default
PHP Version: 5.2.11
New Comment:
Here the var_dump:
array(6) {
[Field]=
string(17) hereIsDefaultNULL
[Type]=
string(8) int(255)
[Null]=
string(3) YES
[Key]=
string(0)
[Default]=
NULL
[Extra]=
string(0)
}
array(6) {
[Field]=
string(19) defaultEmptyvarchar
[Type]=
string(12) varchar(255)
[Null]=
string(2) NO
[Key]=
string(0)
[Default]=
string(0)
[Extra]=
string(0)
}
Yes, I know that '' == NULL (true), but in mySQL :
mysql SELECT '' IS NULL;
++
| '' IS NULL |
++
| 0 |
++
mysql SELECT NULL IS NULL;
+--+
| NULL IS NULL |
+--+
|1 |
+--+
Previous Comments:
[2009-11-12 10:06:28] u...@php.net
Wait, ... I didn't get you changed table structure. Can you provide a
new var_dump but keep in mind:
[2009-11-12 11:05] Jani_ '' == NULL (true), NULL == NULL (true).
Ulf
[2009-11-12 10:00:16] j...@php.net
Please, ask further question on how to use PHP elsewhere. There are no
bugs in this in either PHP or MySQL.
[2009-11-12 09:33:02] u...@php.net
Bogus
Why would one return NULL for meta data. NULL = undefined, NULL =
defined.
[2009-11-12 09:08:40] w at lder dot de
OK, but how can I get the value NULL?
I think it is an difference between NULL and .
Any idea?
Another Example:
?php
/*
Mysql:
CREATE TABLE IF NOT EXISTS `test` (
`hereIsDefaultNULL` int(255) default NULL,
`defaultEmptyvarchar` varchar(255) NOT NULL default ''
)
*/
mysql_connect('localhost','root','');
mysql_select_db('test');
$columns_res = mysql_query('SHOW COLUMNS FROM `test`');
while ($fieldRow = mysql_fetch_assoc($columns_res)) {
if ($fieldRow['Default'] == NULL) {
echo $fieldRow['Field'] . ' is NULL /br';
}
}
?
Expected result:
hereIsDefaultNULL is NULL
Actual result:
--
hereIsDefaultNULL is NULL
defaultEmptyvarchar is NULL
[2009-11-12 08:38:18] j...@php.net
Replace print_r() with var_dump() and prepare for surprise.
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/50147
--
Edit this bug report at http://bugs.php.net/?id=50147edit=1
#50147 [Bgs]: DEFAULT NULL Values in mysql_query('SHOW COLUMNS FROM `xx`');
ID: 50147
User updated by: w at lder dot de
Reported By: w at lder dot de
Status: Bogus
Bug Type: MySQL related
Operating System: Linux 2.6.16.21-0.25-default
PHP Version: 5.2.11
New Comment:
Hi Jani,
right, thank you.
If someone has a similar problem here my workaround to solve the
problem.
The goal is to compare an line in a sql Create Table Statement with the
actually value in the Database
?php
$str = '`hereIsDefaultNULL` int(255) default NULL';
mysql_connect('localhost','root','');
mysql_select_db('test');
$columns_res = mysql_query('SHOW COLUMNS FROM `test`');
while ($fieldRow = mysql_fetch_assoc($columns_res)) {
if ($fieldRow['Default'] === NULL) {
$fieldRow['Default'] = 'NULL';
}
$strToCompare= '`' . $fieldRow['Field'] . '` ' . $fieldRow['Type'] .
' default ' . $fieldRow['Default'];
if ($str == $strToCompare) {
echo 'OK';
}
}
?
Previous Comments:
[2009-11-12 10:43:49] j...@php.net
But in PHP ('' == NULL) is true and ('' === NULL) isn't. :)
[2009-11-12 10:27:50] w at lder dot de
Here the var_dump:
array(6) {
[Field]=
string(17) hereIsDefaultNULL
[Type]=
string(8) int(255)
[Null]=
string(3) YES
[Key]=
string(0)
[Default]=
NULL
[Extra]=
string(0)
}
array(6) {
[Field]=
string(19) defaultEmptyvarchar
[Type]=
string(12) varchar(255)
[Null]=
string(2) NO
[Key]=
string(0)
[Default]=
string(0)
[Extra]=
string(0)
}
Yes, I know that '' == NULL (true), but in mySQL :
mysql SELECT '' IS NULL;
++
| '' IS NULL |
++
| 0 |
++
mysql SELECT NULL IS NULL;
+--+
| NULL IS NULL |
+--+
|1 |
+--+
[2009-11-12 10:06:28] u...@php.net
Wait, ... I didn't get you changed table structure. Can you provide a
new var_dump but keep in mind:
[2009-11-12 11:05] Jani_ '' == NULL (true), NULL == NULL (true).
Ulf
[2009-11-12 10:00:16] j...@php.net
Please, ask further question on how to use PHP elsewhere. There are no
bugs in this in either PHP or MySQL.
[2009-11-12 09:33:02] u...@php.net
Bogus
Why would one return NULL for meta data. NULL = undefined, NULL =
defined.
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/50147
--
Edit this bug report at http://bugs.php.net/?id=50147edit=1
#50147 [NEW]: DEFAULT NULL Values in mysql_query('SHOW COLUMNS FROM `xx`');
From: w at lder dot de
Operating system: Linux 2.6.16.21-0.25-default
PHP version: 5.2.11
PHP Bug Type: MySQL related
Bug description: DEFAULT NULL Values in mysql_query('SHOW COLUMNS FROM `xx`');
Description:
The attached Code results a wrong result.
MySQL:
Server Version: 5.0.26
MySQL-Client-Version: 5.0.26
Reproduce code:
---
?php
/*
MySQL:
CREATE TABLE IF NOT EXISTS `test` (
`hereIsDefaultNULL` int(255) default NULL,
`defaultNULLvarchar` varchar(255) default NULL
)
*/
mysql_connect('localhost','user','');
mysql_select_db('test');
$columns_res = mysql_query('SHOW COLUMNS FROM `test`');
while ($fieldRow = mysql_fetch_assoc($columns_res)) {
print_r($fieldRow) ;
}
?
Expected result:
Array
(
[Field] = hereIsDefaultNULL
[Type] = int(255)
[Null] = YES
[Key] =
[Default] = NULL
[Extra] =
)
Array
(
[Field] = defaultNULLvarchar
[Type] = varchar(255)
[Null] = YES
[Key] =
[Default] = NULL
[Extra] =
)
Actual result:
--
Array
(
[Field] = hereIsDefaultNULL
[Type] = int(255)
[Null] = YES
[Key] =
[Default] =
[Extra] =
)
Array
(
[Field] = defaultNULLvarchar
[Type] = varchar(255)
[Null] = YES
[Key] =
[Default] =
[Extra] =
)
--
Edit bug report at http://bugs.php.net/?id=50147edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=50147r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=50147r=trysnapshot53
Try a snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=50147r=trysnapshot60
Fixed in SVN:
http://bugs.php.net/fix.php?id=50147r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=50147r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=50147r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=50147r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=50147r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=50147r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=50147r=support
Expected behavior:
http://bugs.php.net/fix.php?id=50147r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=50147r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=50147r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=50147r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=50147r=php4
Daylight Savings:http://bugs.php.net/fix.php?id=50147r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=50147r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=50147r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=50147r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=50147r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=50147r=mysqlcfg
#50147 [Com]: DEFAULT NULL Values in mysql_query('SHOW COLUMNS FROM `xx`');
ID: 50147
Comment by: w at lder dot de
Reported By: w at lder dot de
Status: Feedback
Bug Type: MySQL related
Operating System: Linux 2.6.16.21-0.25-default
PHP Version: 5.2.11
New Comment:
Here is the result:
mysql SHOW COLUMNS FROM test;
++--+--+-+-+---+
| Field | Type | Null | Key | Default | Extra |
++--+--+-+-+---+
| hereIsDefaultNULL | int(255) | YES | | NULL| |
| defaultNULLvarchar | varchar(255) | YES | | NULL| |
++--+--+-+-+---+
Previous Comments:
[2009-11-11 10:44:06] u...@php.net
ext/mysql returns whatever MySQL delivers. Please verify that the MySQL
prompt returns the result you want. If not, this is a MySQL bug not a
PHP bug.
Please run on the command line:
mysql -uuser -ppassword database...
mysql SHOW COLUMNS FROM mytable
[2009-11-11 10:35:02] w at lder dot de
Description:
The attached Code results a wrong result.
MySQL:
Server Version: 5.0.26
MySQL-Client-Version: 5.0.26
Reproduce code:
---
?php
/*
MySQL:
CREATE TABLE IF NOT EXISTS `test` (
`hereIsDefaultNULL` int(255) default NULL,
`defaultNULLvarchar` varchar(255) default NULL
)
*/
mysql_connect('localhost','user','');
mysql_select_db('test');
$columns_res = mysql_query('SHOW COLUMNS FROM `test`');
while ($fieldRow = mysql_fetch_assoc($columns_res)) {
print_r($fieldRow) ;
}
?
Expected result:
Array
(
[Field] = hereIsDefaultNULL
[Type] = int(255)
[Null] = YES
[Key] =
[Default] = NULL
[Extra] =
)
Array
(
[Field] = defaultNULLvarchar
[Type] = varchar(255)
[Null] = YES
[Key] =
[Default] = NULL
[Extra] =
)
Actual result:
--
Array
(
[Field] = hereIsDefaultNULL
[Type] = int(255)
[Null] = YES
[Key] =
[Default] =
[Extra] =
)
Array
(
[Field] = defaultNULLvarchar
[Type] = varchar(255)
[Null] = YES
[Key] =
[Default] =
[Extra] =
)
--
Edit this bug report at http://bugs.php.net/?id=50147edit=1
