RE: Defaul of NOW()
Only constant values are allowed as default values. If this is the first timestamp column it will be updated on insert and with every update. -Original Message- From: Scott Haneda To: MySql Sent: 5/26/04 8:20 PM Subject: Defaul of NOW() I have a field in mysql 4, using InnoDB Field is timestamp 14 and defualt is set to 00, which I want to be the result of NOW() so that every record made will get NOW() as the value, I can not get it to work... ALTER TABLE `addresses` CHANGE `added` `added` TIMESTAMP( 14 ) DEFAULT 'NOW()'; Query OK, 2 rows affected (0.01 sec) Records: 2 Duplicates: 0 Warnings: 0 It tells me it worked, but then it reverts back to the zero's. -- - Scott HanedaTel: 415.898.2602 http://www.newgeo.com Fax: 313.557.5052 [EMAIL PROTECTED]Novato, CA U.S.A. -- 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: Defaul of NOW()
I didn't think you could have a DEFAULT of NOW() because it's not a true static value. Seems I read that in one of Paul DuBois' books. Jim Winstead wrote: On Wed, May 26, 2004 at 06:20:22PM -0700, Scott Haneda wrote: I have a field in mysql 4, using InnoDB Field is timestamp 14 and defualt is set to 00, which I want to be the result of NOW() so that every record made will get NOW() as the value, I can not get it to work... ALTER TABLE `addresses` CHANGE `added` `added` TIMESTAMP( 14 ) DEFAULT 'NOW()'; Query OK, 2 rows affected (0.01 sec) Records: 2 Duplicates: 0 Warnings: 0 It tells me it worked, but then it reverts back to the zero's. If you do a SHOW CREATE TABLE on the table, you'll see that it has actually ignored your DEFAULT. (What is has done is actually transformed it to '00', since that is what the string 'NOW()' becomes when you convert it to a TIMESTAMP.) Read this section in the manual for information on how the default value for TIMESTAMP columns is handled: http://dev.mysql.com/doc/mysql/en/TIMESTAMP_pre-4.1.html Support for specifying how TIMESTAMP columns get updated is coming in 4.1.2. Right now, it is only documented in the change notes: http://dev.mysql.com/doc/mysql/en/News-4.1.2.html Jim Winstead MySQL AB -- Scott Plumlee PGP Public key: http://plumlee.org/pgp/ D64C 47D9 B855 5829 D22A D390 F8E2 9B58 9CBF 1F8D -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: Defaul of NOW()
On Wed, May 26, 2004 at 06:20:22PM -0700, Scott Haneda wrote: I have a field in mysql 4, using InnoDB Field is timestamp 14 and defualt is set to 00, which I want to be the result of NOW() so that every record made will get NOW() as the value, I can not get it to work... ALTER TABLE `addresses` CHANGE `added` `added` TIMESTAMP( 14 ) DEFAULT 'NOW()'; Query OK, 2 rows affected (0.01 sec) Records: 2 Duplicates: 0 Warnings: 0 It tells me it worked, but then it reverts back to the zero's. If you do a SHOW CREATE TABLE on the table, you'll see that it has actually ignored your DEFAULT. (What is has done is actually transformed it to '00', since that is what the string 'NOW()' becomes when you convert it to a TIMESTAMP.) Read this section in the manual for information on how the default value for TIMESTAMP columns is handled: http://dev.mysql.com/doc/mysql/en/TIMESTAMP_pre-4.1.html Support for specifying how TIMESTAMP columns get updated is coming in 4.1.2. Right now, it is only documented in the change notes: http://dev.mysql.com/doc/mysql/en/News-4.1.2.html Jim Winstead MySQL AB -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
