Support SELECT ... WHERE .. without FROM

[dyzsr]

Feature Request

Is your feature request related to a problem? Please describe:

TiDB

mysql root@127.0.0.1:test> select 1 where 1 group by 1 having 1 order by 1
(1064, 'You have an error in your SQL syntax; check the manual that corresponds to your TiDB version for the right syntax to use line 1 column 14 near "where 1 group by 1 having 1 order by 1" ')

MySQL

mysql root@localhost:test> select 1 where 1 group by 1 having 1 order by 1;
+---+
| 1 |
+---+
| 1 |
+---+
1 row in set
Time: 0.008s

Describe the feature you'd like:

Support it like MySQL.

Describe alternatives you've considered:

Support

select 1 from dual where 1 group by 1 having 1 order by 1

Teachability, Documentation, Adoption, Migration Strategy:

[kennytm]

thanks, but this is a duplicate of #115.