[Bug] time_zone not work for function `from_unixtime`

[yangzhg]

Search before asking

• I had searched in the issues and found no similar issues.

Version

master

What's Wrong?

time_zone not work for function from_unixtime

What You Expected?

time_zone is work for from_unixtime

How to Reproduce?

set enable_fold_constant_by_be=true;
set time_zone="+00:00";
MySQL [(none)]> select from_unixtime(1553152255);
+---------------------------+
| from_unixtime(1553152255) |
+---------------------------+
| 2019-03-21 15:10:55       |
+---------------------------+
1 row in set (0.009 sec)

it should be

MySQL [(none)]> select from_unixtime(1553152255);
+---------------------------+
| from_unixtime(1553152255) |
+---------------------------+
| 2019-03-21 07:10:55       |
+---------------------------+
1 row in set (0.009 sec)

Anything Else?

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct