Re: psql tabcomplete - minor bugfix - tabcomplete for SET ROLE TO xxx

On 05/29/2015 10:41 AM, Pavel Stehule wrote:
> 2015-05-29 9:28 GMT+02:00 Jeevan Chalke <jeevan.chalke@gmail.com>:
>
>> I agree with Peter that "We don't tab-complete everything we possibly
>> could", but using tabs after "SET ROLE TO " provides "DEFAULT" as an option
>> which seems wrong.
>> This patch adds list of roles over there, which I guess good to have than
>> giving something unusual.
>>
>...
>
> But back to this topic. I am thinking so it is little bit different due
> fact so we support two very syntax for one feature. And looks little bit
> strange, so one way is supported by autocomplete and second not.

Yeah, it's a bit strange. We have a specific autocomplete rule for "SET 
ROLE", but "SET ROLE TO" is treated as a generic GUC. With your patch, 
we'd also lose the auto-completion to "SET ROLE TO DEFAULT".

I think we want to encourage people to use the SQL-standard syntax "SET 
ROLE ..." rather than the PostgreSQL-specific "SET ROLE TO ...". On the 
whole, this just doesn't seem like much of an improvement. I'll mark 
this as 'rejected' in the commitfest app.

PS. I note that the auto-completion for "SET XXX TO ... is pretty lousy 
in general. We have rules for DateStyle, IntervalStyle, GEQO and 
search_path, but that's it. That could be expanded a lot. All enum-type 
GUCs could be handled with a single rule that queries 
pg_settings.enumvals, for example, and booleans would be easy too. But 
that's a different story.

- Heikki