I'm trying to make a table that has a "created" timestamp and an "updated" timestamp (and have MySQL insert values in there automatically for me). It's doable, see: http://gusiev.com/2009/04/update-and-create-timestamps-with-mysql/.
As a first step, I copied the example table from the reference site and modeled it in Workbench. I then did a forward engineer and tested the resulting SQL in phpMyAdmin. Everything worked. Here was the SQL:
-- -----------------------------------------------------
-- Table `test_table`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `test_table` ;
CREATE TABLE IF NOT EXISTS `test_table` (
`id` INT NOT NULL AUTO_INCREMENT ,
`stamp_created` TIMESTAMP NULL DEFAULT '0000-00-00 00:00:00' ,
`stamp_updated` TIMESTAMP NULL DEFAULT now() on update now() ,
PRIMARY KEY (`id`) )
ENGINE = InnoDB;
After verifying that the idea works, I then implemented the concept in one of my actual tables. The resulting SQL was this:
-- -----------------------------------------------------
-- Table `user_login`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `user_login` ;
CREATE TABLE IF NOT EXISTS `user_login` (
`user_login_id` INT NOT NULL AUTO_INCREMENT ,
`user_id` INT NOT NULL ,
`hashed_password` CHAR(255) NULL ,
`provider_id` CHAR(255) NULL ,
`provider_name` CHAR(255) NULL ,
`unverified_email_address` CHAR(255) NULL ,
`verification_code_email_address` CHAR(255) NULL ,
`verification_code_password_change` CHAR(255) NULL ,
`verified_email_address` CHAR(255) NULL ,
`stamp_created` TIMESTAMP NULL DEFAULT '0000-00-00 00:00:00' ,
`stamp_updated` TIMESTAMP NULL DEFAULT now() on update now() ,
`stamp_deleted` TIMESTAMP NULL ,
PRIMARY KEY (`user_login_id`) ,
INDEX `user_login_user_id` (`user_id` ASC) ,
UNIQUE INDEX `verified_email_address_UNIQUE` (`verified_email_address` ASC) ,
UNIQUE INDEX `unverified_email_address_UNIQUE` (`unverified_email_address` ASC) ,
CONSTRAINT `user_login_user_id`
FOREIGN KEY (`user_id` )
REFERENCES `user` (`user_id` )
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
When I execute the SQL, I get the following error:
#1067 - Invalid default value for 'stamp_created'
Anyone see what's causing my problem?
stamp_created TIMESTAMP NULL DEFAULT 0,
or
stamp_created TIMESTAMP NULL DEFAULT 0 ON UPDATE CURRENT_TIMESTAMP,
depending on your needs, however in your case logical should be:
stamp_created TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP,