Re: Error: 'cache lookup failed' w/trigger

Meanwhile, I've found the source of my problem myself. When I drop a
function and re-create it (this is what phpPgAdmin does when "modifying" a
function), I also have to drop and re-create the corresponding trigger.
Again one of these 'gotchas' for beginners...

mg schrieb:

> Hello,
>
> I'm new to Postgresql and just tried to write my very first pgsql
> trigger procedure. So
> please forgive me if this is a stupid question.
>
> This is what I did:
> 1. using bash as user postgres (my db superuser) on my RH6.2 linux box:
> bash$ export PGLIB=/usr/lib/pgsql
> bash$ createlang plpgsql mydb
>
> 2. using phpPgAdmin, I then could create the following procedure:
>
> CREATE FUNCTION "datetimestamp"() RETURNS OPAQUE AS
> 'BEGIN NEW.modificationdatetime := \'now\' END;'
> LANGUAGE 'plpgsql'
>
> 3. Then I created a trigger:
> CREATE TRIGGER "accounts_datetimestamp" BEFORE INSERT OR UPDATE ON
> "accounts" FOR EACH ROW EXECUTE PROCEDURE datetimestamp();
>
> Now everytime I try to update something in my accounts table I get the
> message:
> ERROR: fmgr_info: function 51232: cache lookup failed
>
> What's wrong here?
> BTW: is there a source for trigger procedure examples? These trigger
> procedures could help me solve a lot of problems.
>
> Thanks for any suggestions
> Greetings from switzerland
> --Marcel