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libpq PQftype() to comprehend types?
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* libpq PQftype() to comprehend types?
@ 1999-03-11 18:44 Michael Olivier <mo@local2me.com>
  1999-03-12 01:59 ` Re: [INTERFACES] libpq PQftype() to comprehend types? Tom Lane <tgl@sss.pgh.pa.us>
  0 siblings, 1 reply; 2+ messages in thread

From: Michael Olivier @ 1999-03-11 18:44 UTC (permalink / raw)
  To: pgsql-interfaces; +Cc: michael@local2me.com

Can someone tell me how I can use PQftype() or some other mechanism to
interpret a query result in terms of the data types of the columns?


I need to be able to tell what data type a given column is. The 6.3.2
manual says PQftype() returns an internal coding -- is this defined in a
header file I can access, or ... ?

thanks,
Michael



^ permalink  raw  reply  [nested|flat] 2+ messages in thread

* Re: [INTERFACES] libpq PQftype() to comprehend types?
  1999-03-11 18:44 libpq PQftype() to comprehend types? Michael Olivier <mo@local2me.com>
@ 1999-03-12 01:59 ` Tom Lane <tgl@sss.pgh.pa.us>
  0 siblings, 0 replies; 2+ messages in thread

From: Tom Lane @ 1999-03-12 01:59 UTC (permalink / raw)
  To: Michael Olivier <mo@local2me.com>; +Cc: pgsql-interfaces

Michael Olivier <mo@local2me.com> writes:
> Can someone tell me how I can use PQftype() or some other mechanism to
> interpret a query result in terms of the data types of the columns?

The PQftype value is the OID of the row for the type in the system
pg_type catalog.  Try

	SELECT * FROM pg_type WHERE oid = <PQftype result>

BTW: oid's for the predefined types are consistent across installations,
but oid's for user-defined types are not (and shouldn't even be trusted
across a save/reload).

			regards, tom lane



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