| From: | DAVID ROTH <adaptron(at)comcast(dot)net> |
|---|---|
| To: | Christophe Pettus <xof(at)thebuild(dot)com> |
| Cc: | "pgsql-general(at)lists(dot)postgresql(dot)org" <pgsql-general(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Trigger Function question |
| Date: | 2023-07-10 18:29:59 |
| Message-ID: | 1715546791.171305.1689013799237@connect.xfinity.com |
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| Thread: | |
| Lists: | pgsql-general |
I want to use a single trigger function to log multiple tables and the tables have different columns. I can get the names of the columns from the catalog. But I have not been able to figure out how to get NEW.x when x is not known until run time.
> On 07/10/2023 2:23 PM EDT Christophe Pettus <xof(at)thebuild(dot)com> wrote:
>
>
> > On Jul 10, 2023, at 11:20, DAVID ROTH <adaptron(at)comcast(dot)net> wrote:
> >
> > In a trigger function, is there a way to get a list of all of the columns in the triggering table?
>
> You can get the table that the trigger fired on with TG_TABLE_SCHEMA and TG_TABLE_NAME, and then query the system catalogs to get a list of columns.
>
> But can you tell us a bit more about your use-case? You may be able to write the trigger in such a way that it doesn't need to change behavior based on the columns.
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