Hi Rhys,

I found no records for the query you have shared. I tried to update tzdata using yum update tzdata and reload the time zones tables and restart the db server. Still no effect. 

I think this time_zone_name doesn't store day light abbreviation (Ex: EDT, CDT etc). But storing EST, CST etc. 

MariaDB [mysql]> select * from time_zone_name where length(name) = 3;
+------+--------------+
| Name | Time_zone_id |
+------+--------------+
| CET  |          371 |
| EET  |          385 |
| EST  |          386 |
| GMT  |          490 |
| HST  |          495 |
| MET  |          515 |
| MST  |          516 |
| PRC  |          524 |
| ROC  |          571 |
| ROK  |          572 |
| UCT  |          575 |
| UTC  |          589 |
| WET  |          592 |
+------+--------------+


Can anyone execute in your system and see you are successful:

On Wed, Jun 7, 2017 at 4:19 PM, <Rhys.Campbell@swisscom.com> wrote:

What does this return?

 

SELECT * FROM time_zone_name WHERE `name` = 'EDT';

 

This is not present on my system on Red Hat Enterprise Linux Server release 6.8 (Santiago). You'll need to manually insert this data or get a updates TZ file I guess.

 

Rhys

 

From: Maria-discuss [mailto:maria-discuss-bounces+rhys.campbell=swisscom.com@lists.launchpad.net] On Behalf Of Karthick Subramanian
Sent: 07 June 2017 11:09
To: Maria Discuss <maria-discuss@lists.launchpad.net>
Subject: [Maria-discuss] Time Zone help

 

All,

 

I am facing some strange issue, I believe its due to my ignorant, would appreciate if you can help me out on this:

 

DB Server system OS CentOS.

 

I have loaded the timezone tables in mysql using:

 

mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root -p mysql

After loading, I have restrated the DB using systemctl restart mariadb:

 

Then I have tried below in DB:

 

select @@global.time_zone,@@system_time_zone;

 

Inline image 1

 

SELECT CONVERT_TZ( NOW(), @@global.time_zone , 'UTC' ), UTC_TIMESTAMP;

 

Inline image 3

 

SELECT CONVERT_TZ( NOW(), @@system_time_zone , 'UTC' ), UTC_TIMESTAMP;

 

Inline image 4

 

SELECT CONVERT_TZ( NOW(), 'EDT' , 'UTC' ), UTC_TIMESTAMP;

 

Inline image 2

 

For some reason, If I use named TZ in CONVERT_TZ function for FROM_TZ, its always showing NULL. 

 

Can anyone help me out what else i can do so I can pass the abbreviation or named TZ in FROM_TZ. 

 

Regards,

Karthick