Re: Retrieving comment of rules and triggers

On Thu, Jun 9, 2016 at 5:01 PM, David G. Johnston <
david(dot)g(dot)johnston(at)gmail(dot)com> wrote:

> On Thu, Jun 9, 2016 at 4:45 PM, Alex Magnum <magnum11200(at)gmail(dot)com> wrote:
>
>> Hi, is there a way to retrieve the comment of rules and triggers. I
>> worked it out on functions, tables, views but am kind of stuck with rules
>> and triggers.
>>
>
> ​
> https://www.postgresql.org/docs/devel/static/functions-info.html
>
> ​Table ​9-63. Comment Information Functions
>
> obj_description(object_oid, catalog_name)
>
> Catalog Names:
>
> pg_trigger
> pg_rules
>
> The source catalog for the data is:
>
> pg_description
>
> I'm suspect of your existing solution given that this is supposed to be a
> universal interface for comment data...
>
> David J.
>
>
-- To get all rule comments
SELECT DISTINCT r.rulename,
c.description
FROM pg_rewrite r
JOIN pg_description c ON c.objoid = r.oid;

-- To get all trigger comments

SELECT DISTINCT t.tgname,
c.description
FROM pg_trigger t
JOIN pg_description c ON c.objoid = t.oid;

--
*Melvin Davidson*
I reserve the right to fantasize. Whether or not you
wish to share my fantasy is entirely up to you.