Re: Object IDs in Parse message

select oid, * from pg_type

Dave Cramer

davec(at)postgresintl(dot)com
www.postgresintl.com

On Tue, 3 Sep 2019 at 16:01, Malcolm Matalka <mmatalka(at)gmail(dot)com> wrote:

> Hello, I'm implementing my own pgsql client for fun and I'm trying to
> understand how to send a Parse message. The final parameter to Parse is
> a series of Int32s with the description:
>
> Specifies the object ID of the parameter data type. Placing a zero here
> is equivalent to leaving the type unspecified.
>
> But where do I find the list of object IDs? Doing some internet
> searches didn't bring up much. Poking around the code I came across the
> file:
>
> ./src/backend/catalog/pg_type_d.h
>
> And that has a series of OID's with integer values. Is this the mapping
> I'm looking for?
>
> If so, It's not clear how to express some things. For example there is
> a MONEYARRAYOID, but no MONEYOID. Would I use, for example, NUMERICOID
> for money? If so, why does MONEYARRAYOID exist rather than using
> NUMERICOID?
>
> Thanks,
> /Malcolm
>