On Thu, 10 Jul 2003, adivi wrote:
> can trigger proceedures ( procedures to be executed from within a trigger )
> not be written in sql.
AFAICT, no, sql functions cannot return opaque/trigger. However you can
write trigger functions in most/all of the pl languages (plpgsql, pltcl,
etc...) I think the trigger examples for plpgsql are in plpgsql's
documentation.