Re: Functions as default values
I am trying to use a function as a default value for a column but do not seem to get the desired result. I want to use the NOW() function for a last_updated column, here is my code... CREATE TABLE test_table ( last_updated datetime NOT NULL default `NOW()` ) TYPE=MyISAM; This gives an error; CREATE TABLE test_table ( last_updated datetime NOT NULL default 'NOW()' ) TYPE=MyISAM; Now the table shows a default value of -00-00 00:00:00, when I add a new row the value of last_updated is also -00-00 00:00:00. I am using MySQL 3.23.37, can anyone help? funcion as default-value is not allowed AFAIK but timestamp will help you to get what you want! http://www.mysql.com/doc/en/DATETIME.html -- Sebastian Mendel www.sebastianmendel.de www.tekkno4u.de www.nofetish.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: Functions as default values
No functions as default values is a bummer, but timestamp will do he trick, so thanks for your help; much appreciated. Phil. -Original Message- From: Cybot [mailto:[EMAIL PROTECTED] Sent: 06 August 2003 15:37 To: [EMAIL PROTECTED] Subject: Re: Functions as default values > I am trying to use a function as a default value for a column but do not > seem to get the desired result. I want to use the NOW() function for a > last_updated column, here is my code... > > CREATE TABLE test_table ( > last_updated datetime NOT NULL default `NOW()` > ) TYPE=MyISAM; > > This gives an error; > > CREATE TABLE test_table ( > last_updated datetime NOT NULL default 'NOW()' > ) TYPE=MyISAM; > > Now the table shows a default value of -00-00 00:00:00, when I add a new > row the value of last_updated is also -00-00 00:00:00. I am using MySQL > 3.23.37, can anyone help? funcion as default-value is not allowed AFAIK but timestamp will help you to get what you want! http://www.mysql.com/doc/en/DATETIME.html -- Sebastian Mendel www.sebastianmendel.de www.tekkno4u.de www.nofetish.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: Functions as default values
From: Gerald Clark <[EMAIL PROTECTED]>
> Default values must be constants.
> Håkan Elmqvist wrote:
> > Now I want to register who changed it...
===> MY two cents worth:
With MySQL, this sort of thing usually gets handled in a piece of software. In Perl,
we might say something like:
$sth = $dbh->prepare(qq{INSERT INTO my_table (user, data) VALUES (?,?)});
$sth->execute(user(), $data);
I know that I'd like to be able to define internal divisiveness like:
CREATE TABLE my_table (
id int unsigned default my_sequence_routine(),
...
);
But I wouldn't be willing to have this in the engine if it meant a performance hit
during the times when I wasn't this functionality.
---
Rodney Broom
Programmer: Desert.Net
-
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Re: Functions as default values
You can't. Default values must be constants. Håkan Elmqvist wrote: > Timestamp is a useful datatype when you want to register when a record > changed. Now I want to register who changed it and tried to use user() > as a default value and my database just returned user() as the field > value. Is there someone who can tell me how to use a function result as > default value? The manual is not very clear on this issue. > H > > > Professor Håkan Elmqvist > Avdelningen för medicinsk teknik > Institutionen för medicinsk laboratorievetenskap & teknik > KAROLINSKA INSTITUTET > Novum > 141 57 Huddinge > Tel 46-8-585 837 55, Fax 46-8-779 55 50 > epost [EMAIL PROTECTED] > Organisationsno. 01 202100-2973 01 > Vat No. SE 202100297301 > > - > Before posting, please check: > http://www.mysql.com/manual.php (the manual) > http://lists.mysql.com/ (the list archive) > > To request this thread, e-mail <[EMAIL PROTECTED]> > To unsubscribe, e-mail > <[EMAIL PROTECTED]> > Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php -- Gerald L. Clark [EMAIL PROTECTED] - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
