Re: DETOAST Datum

On Mon, May 16, 2011 at 7:52 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> > On Mon, May 16, 2011 at 3:41 AM, Nick Raj <nickrajjain(at)gmail(dot)com> wrote:
> >> "How to get arguments toastable??" and even my table
> pg_class.reltoastrelid
> >> entry is zero.
>
> > It's pretty hard to guess what's going wrong here from the information
> > you've provided. But reltoastid should not be 0 if you're using a
> > variable-length data type.
>
> It could be if the type is not marked toastable (ie, has storage class
> PLAIN, which I think is the default even for varlena types).
>
> But in any case I suspect that 90% of the problem here is an incorrect
> declaration of the *function* not the type. We haven't seen the C
> function declaration, nor the SQL CREATE FUNCTION command, but if it's
> going through fmgr_oldstyle then there isn't a PG_FUNCTION_INFO_V1
> marker, which maybe is the problem.
>
> Thanks for your replies

Tom, you are correct. I missed PG_FUNCTION_INFO_V1 marker. After adding this
marker, my code works fine.
Thanks a lot.

> regards, tom lane
>