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 <melvin6...@gmail.com> wrote: > SELECT typname > FROM pg_type > WHERE oid = Oid_x; > > On Mon, Oct 19, 2015 at 2:36 PM, Ken Been <kbb...@gmail.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. >
