Date: Tue, 11 Jun 2024 20:56:20 +0200
From: hubert depesz lubaczewski <depesz@depesz.com>
Sender: depesz@depesz.com
To: veem v <veema0000@gmail.com>
Cc: pgsql-general <pgsql-general@lists.postgresql.org>
Subject: Re: Does trigger only accept functions?
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On Wed, Jun 12, 2024 at 12:19:55AM +0530, veem v wrote:
> CREATE OR REPLACE FUNCTION log_deletes()
> RETURNS TRIGGER AS $$
> BEGIN
>     IF TG_TABLE_NAME = 'source_table1' THEN
>         INSERT INTO delete_audit1 ( col1, col2, col3)
>         VALUES (OLD.col1, OLD.col2, OLD.col3);
>     ELSIF TG_TABLE_NAME = 'source_table2' THEN
>         INSERT INTO delete_audit2 ( col4, col5, col6)
>         VALUES (OLD.col4, OLD.col5, OLD.col6);
>     -- Add more conditions for other tables
>     ELSE
>         RAISE EXCEPTION 'Audit table not defined for %', TG_TABLE_NAME;
>     END IF;
>     RETURN OLD;
> END;
> $$ LANGUAGE plpgsql;

No, I meant building dynamic queries and then EXECUTE-ing, like docs
show:
https://www.postgresql.org/docs/current/plpgsql-statements.html#PLPGSQL-STATEMENTS-EXECUTING-DYN

Best regards,

depesz