It still doesn't work. btw, I am using 8rc2.
changed it to:
        Datum        result; 
      HeapTuple    tupleCopy;
      tupleCopy = heap_copytuple(tuple);
      result = HeapTupleGetDatum(tupleCopy);
      SRF_RETURN_NEXT(funcctx, result);

its probably something with the column description. the rows are
returned ok with select testgetrows();
but not with select * from testgetrows();

Regards,
        tzahi.

> -----Original Message-----
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of Tom Lane
> Sent: Friday, January 07, 2005 8:59 PM
> To: Tzahi Fadida
> Cc: pgsql-general@postgresql.org
> Subject: Re: [GENERAL] ERROR: cache lookup failed for type 0 
> 
> 
> Tzahi Fadida <[EMAIL PROTECTED]> writes:
> > Hi, I am learning how to use the c functions and my function below 
> > works when I do: select testgetrows();
> > but when I do select * from testgetrows(); I am getting:
> > "ERROR:  cache lookup failed for type 0"
> > Whats's the problem?
> 
> I don't think it's safe to do HeapTupleGetDatum() directly on 
> a tuple obtained from heap_getnext.  You need to copy it.
> 
>                       regards, tom lane
> 
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