On Wed, 11 Jul 2001 pgsql-bugs@postgresql.org wrote:
> José María Fernández González (jmfernandez@cnb.uam.es) reports a bug
> with a severity of 2
> The lower the number the more severe it is.
>
> Short Description
> PL/pgSQL triggers with parameters don't work
>
> Long Description
> The report is for PostgreSQL 7.1.2. When you create a trigger
> which calls a function with parameters, the system links against the
> function with the same name and no parameter, and if it doesn't exist
> it tells "function doesn't exist". Tests have been made with
> PL/pgSQL-encoded functions.
Trigger functions take their arguments in a different fashion.
They should be defined as taking no regular arguments and returning
opaque and it's something like TG_ARGS in plpgsql that the create
trigger time arguments are passed in. I believe this is described in
the documentation.