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Re: Disable validation for `DATETIME` columns


Hi Sergei,

Sergei Golubchik schreef op 2023-03-30 14:54:
Hi, William,

Could you provide a sequence of SQL commands demonstrating what exactly
is not working?

I've just tried and I was able to insert '2023-03-26 02:30:00' into a
DATETIME column just fine.

After consulting with the customer, it turns out that the error indeed does NOT occur with `DATETIME` columns. However, according to the documentation[1], it should.

The issue does occur with `TIMESTAMP` columns. However, this behaviour is not mentioned in the documentation[2].

Am I misunderstanding the documentation?


MariaDB [(none)]> SELECT @@session.time_zone;
| @@session.time_zone |
| SYSTEM              |
1 row in set (0.000 sec)

MariaDB [(none)]> SELECT @@global.time_zone;
| @@global.time_zone |
| SYSTEM             |
1 row in set (0.000 sec)

MariaDB [(none)]> SELECT @@system_time_zone;
| @@system_time_zone |
| CET                |
1 row in set (0.000 sec)

MariaDB [(none)]> create database timestamp;
Query OK, 1 row affected (0.000 sec)

MariaDB [(none)]> use timestamp;
Database changed
MariaDB [timestamp]> create table timestamp (timestamp TIMESTAMP);
Query OK, 0 rows affected (0.024 sec)

MariaDB [timestamp]> INSERT INTO timestamp VALUES ('2023-03-26 02:30:00'); ERROR 1292 (22007): Incorrect datetime value: '2023-03-26 02:30:00' for column `timestamp`.`timestamp`.`timestamp` at row 1

[1]: https://mariadb.com/kb/en/datetime/#time-zones
[2]: https://mariadb.com/kb/en/timestamp

VP of MariaDB Server Engineering
and security@xxxxxxxxxxx

On Mar 30, William Edwards wrote:

Is it possible to disable validation for `DATETIME` columns?


A customer uses the Europe/Amsterdam session time zone. Therefore, they
cannot insert dates during the hour in which DST starts and ends.

Using the UTC session time zone would solve the issue. However, they
also use auto-converting `TIMESTAMP` columns. Switching to a different
session time zone would cause issues with those.

Relaxing constraints with

With kind regards,

William Edwards

With kind regards,

William Edwards

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