RE: Support tab completion for upper character inputs in psql

At Sun, 07 Feb 2021 13:55:00 -0500, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote in
>
> This looks like you're trying to force case-insensitive behavior
> whether that is appropriate or not. Does not sound like a good idea.

Thanks for your reply.
I raise this issue because I thought all SQL command should be case-insensitive.
And the set/reset/show commands work well no matter the input configuration parameter is in upper or in lower case.
My modification is not good enough, but I really think it's more convenient if we can support the tab-completion for upper character inputs.

=# set APPLICATION_NAME to test;
SET

=# show APPLICATION_name;
application_name
------------------
test
(1 row)

From: Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>
Sent: Monday, February 8, 2021 5:02 PM

>However set doesn't. If it is what is wanted, the following change on Query_for_list_of_set_vars works (only for the case of SET/RESET commands).

Thanks for your update. I applied your patch, it works well for SET/RESET commands.
I added the same modification to SHOW command. The new patch(V2) can support tab completion for upper character inputs in psql for SET/RESET/SHOW commands.

Regards,
Tang