Re: interperting type oid in C code

Thanks, but I actually wanted to do it from C code. But anyway I think I
found the answer: use the symbolic constants in catalog/pg_type.h, such as
INT4OID.

On Mon, Oct 19, 2015 at 6:44 PM, Melvin Davidson <melvin6925(at)gmail(dot)com>
wrote:

> SELECT typname
> FROM pg_type
> WHERE oid = Oid_x;
>
> On Mon, Oct 19, 2015 at 2:36 PM, Ken Been <kbbeen(at)gmail(dot)com> wrote:
>
>> I'm working on a foreign data wrapper and I want to switch based on the
>> column type. Specifically, if the column type in the external table is the
>> same as in the (locally defined) foreign table then I can get some speedup
>> for some types.
>>
>> Through the ForeignScanState object I can get TupleDesc and AttInMetadata
>> opjects, and through there I can get the Oid of the column type, but now
>> I'm stumped. How can I programmatically check whether Oid X refers to type
>> int4, or whatever?
>>
>> Thanks.
>>
>
>
>
> --
> *Melvin Davidson*
> I reserve the right to fantasize. Whether or not you
> wish to share my fantasy is entirely up to you.
>