why do i get invalid default value error for the variable "last_updated"?
note i am getting this error while i run the following code in MySQL console in phpmyadmin
CREATE TABLE IF NOT EXISTS `articles` (
`article_id` int(10) NOT NULL AUTO_INCREMENT,
`content_id` int(10) NOT NULL,
`article_body` text NOT NULL,
`last_updated` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`article_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=532 ;
You need to change the last_updated column's data type to timestamp rather than datetime. This will allow the use of CURRENT_TIMESTAMP as a default value.
As it happens, these two data types are represented in the same format YYYY-MM-DD HH:MM:SS. So if/when you use the data, you shouldn't run into any troubles.
Check your MySQL server version, CURRENT_TIMESTAMP is allowed since version 5.6.5 as DEFAULT for DATETIME type, otherwise you should use either TIMESTAMP type or maintain it outside.
Related
I have a database (MySQL 8.0) with four timestamp columns, using the default timestamp settings, i.e. no fraction of seconds. I would like to start using fractions of a second, probably two decimals, so TIMESTAMP(2). The process that generates the data does not always provide a timestamp to column timestamp_column_3 (just renamed the columns as timestamp_column_1 to timestamp_column_4 here) and thus there are many '0000-00-00 00:00:00' in timestamp_column_3. When I tried converting the
timestamp_column_1 by running the following query:
ALTER TABLE table_name MODIFY COLUMN timestamp_column TIMESTAMP(2);
I get the following response:
Error Code: 1292. Incorrect datetime value: '0000-00-00 00:00:00' for column 'timestamp_column_3' at row 74608.
So, two questions:
Why does timestamp_column_3 interfere with my altering of column timestamp_column_1?
How do I proceed to convert all four columns to datatype TIMESTAMP(2)?
I looked around and found this answer to a similar question. But I'd rather not modify the mode of the database as I'm not very inexperienced and this is a production database. Is there a way to adjust the timestamps in the column to the minimum allowed (I assume this is 1970-01-01 00:00:00). I don't really care about the value. Also, I don't understand why the insertion process is allowed to insert these incorrect values as the mode is the following:
STRICT_TRANS_TABLES,
NO_ZERO_IN_DATE,
NO_ZERO_DATE,
ERROR_FOR_DIVISION_BY_ZERO,
NO_ENGINE_SUBSTITUTION
The incorrect values doesn't really matter as we know they don't "exist" but of course it would be nice to have everything correct. What would then be the "correct" value instead of a ZERO_DATE?
-- EDIT -- Add some information
Version: 8.0.18-google
Table:
CREATE TABLE `event` (
`c1` int(11) DEFAULT NULL,
`c2` varchar(32) NOT NULL,
`c3` varchar(32) NOT NULL,
`c4` varchar(64) NOT NULL,
`c5` varchar(64) NOT NULL,
`c6` varchar(64) NOT NULL,
`c7` varchar(64) NOT NULL,
`c8` varchar(64) NOT NULL,
`c9` varchar(128) DEFAULT NULL,
`timestamp_column_1` timestamp NOT NULL,
`timestamp_column_2` timestamp NOT NULL,
`timestamp_column_3` timestamp NULL DEFAULT NULL,
`timestamp_column_4` timestamp NOT NULL,
PRIMARY KEY (`c4`),
KEY `event-timestamp_column_1` (`timestamp_column_1`),
KEY `event-timestamp_column_3` (`timestamp_column_3`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
0, a, b, c, d, e, f, g, , 2021-02-19 07:45:30, 2021-02-19 07:45:29, 0000-00-00 00:00:00, 2021-06-03 20:11:45
The data is added through Google Storage CSV import function and timestamp_column_3 sometimes has no data in the CSV file, i.e. the column is just represented as ,, in the CSV.
I'm using the Sequel Pro app to work with my db.
Using Mysql 5.7.
I have the following table structure. When I attempt to reorder the 'created' table column, I get an error from mysql "Invalid default value for 'created'.
I have no rows in the materials table when attempting the reorder.
From everything I've read, CURRENT_TIMESTAMP is the correct default value.
CREATE TABLE `materials` (
`id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`created` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
`modified` datetime NOT NULL ON UPDATE CURRENT_TIMESTAMP,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
My goal is to have the created column be automatically filled when the row is added. modified will automatically update to the current time when changed.
What am I missing?
CURRENT_TIMESTAMP is only acceptable on TIMESTAMP fields. DATETIME fields must be left either with a null default value, or no default value at all - default values must be a constant value, not the result of an expression.
relevant docs: http://dev.mysql.com/doc/refman/5.0/en/data-type-defaults.html
You can work around this by setting a post-insert trigger on the table to fill in a "now" value on any new records.
refer :Invalid default value for 'dateAdded'
I am trying to create a table using the script down below and getting the error
Error Code: 1067. Invalid default value for 'LAST_MODIFIED_TS.
In my understanding after 5.6 you could create more than one timestamp column also it is not necessary to provide default values . Another thing is it is not barfing at Created_TS which is just one line before it.
Also the same script works on windows but not on linux ubuntu , the version of mysql running on both of them is 5.7
CREATE TABLE testdb.test (
ID BIGINT NOT NULL AUTO_INCREMENT,
DESCRIPTION VARCHAR(300) NOT NULL,
CREATED_TS TIMESTAMP NOT NULL,
LAST_MODIFIED_TS TIMESTAMP NOT NULL,
PROPERTY_TYPE VARCHAR(1) DEFAULT 'S',
last_modified timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
CONSTRAINT test_pk PRIMARY KEY
(ID) ) ENGINE=InnoDB ;
Make sure you don't have NO_ZERO_DATE sql_mode variable set (http://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sqlmode_no_zero_date) by running the following query:
show variables like 'sql_mode';
I want to set a uuid value to "id" field via function uuid().
And I do not want to use as Trigger.
CREATE TABLE `test` (
`id` VARCHAR(36) NOT NULL DEFAULT uuid(),
`username` VARCHAR(250) NULL DEFAULT NULL,
`values` VARCHAR(250) NULL DEFAULT NULL ,
PRIMARY KEY (`id`)
)
ENGINE=InnoDB;
the spec is quite explicit on this: http://dev.mysql.com/doc/refman/5.0/en/data-type-defaults.html
With one exception, the default value must be a constant; it cannot be a function or an expression. This means, for example, that you cannot set the default for a date column to be the value of a function such as NOW() or CURRENT_DATE. The exception is that you can specify CURRENT_TIMESTAMP as the default for a TIMESTAMP column.
so either you use triggers, calculate the value beforehand (e.g. in php) or you use some other database, e.g. oracle might support it.
In an existing database, I've age column (INT). Now I need to set it as dob (DATETIME).
I try doing so through PHPMyAdmin, giving CURRENT_TIMESTAMP as default value as defined by answer with 138 upvotes. However PHPMyAdmin is complaining #1067 - invalid default value for 'dob' as in attached screenshot:
Can someone please suggest why I'm getting that error and how to fix that?
You can't set CURRENT_TIMESTAMP as default value with DATETIME.
But you can do it with TIMESTAMP.
See the difference here.
Words from this blog
The DEFAULT value clause in a data type specification indicates a default value for a column. With one exception, the default value must be a constant; it cannot be a function or an expression.
This means, for example, that you cannot set the default for a date column to be the value of a function such as NOW() or CURRENT_DATE.
The exception is that you can specify CURRENT_TIMESTAMP as the default for a TIMESTAMP column.
Set the type of the field as TIMESTAMP too.
I don't think you can achieve that with mysql date. You have to use timestamp or try this approach..
CREATE TRIGGER table_OnInsert BEFORE INSERT ON `DB`.`table`
FOR EACH ROW SET NEW.dateColumn = IFNULL(NEW.dateColumn, NOW());
You're getting that error because the default value current_time is not valid for the type DATETIME. That's what it says, and that's whats going on.
The only field you can use current_time on is a timestamp.
The best way for DateTime is use a Trigger:
/************ ROLE ************/
drop table if exists `role`;
create table `role` (
`id_role` bigint(20) unsigned not null auto_increment,
`date_created` datetime,
`date_deleted` datetime,
`name` varchar(35) not null,
`description` text,
primary key (`id_role`)
) comment='';
drop trigger if exists `role_date_created`;
create trigger `role_date_created` before insert
on `role`
for each row
set new.`date_created` = now();