Sender: hannu@kodu.home.ee
Message-ID: <372E9AC7.965858D2@trust.ee>
Date: Tue, 04 May 1999 09:59:19 +0300
From: Hannu Krosing <hannu@trust.ee>
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To: pgsql-interfaces@postgreSQL.org
CC: Tom Lane <tgl@sss.pgh.pa.us>, "D'Arcy J.M. Cain" <darcy@{druid|vex}.net>
Subject: Re: [INTERFACES] Field types (was Re: Return value of int)
References: <m10eV5K-0000bIC@druid.net>
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"D'Arcy J.M. Cain" wrote:
> 
> Thus spake Tom Lane
> > Hugh Lawson <hglawson@nr.infi.net> writes:
> > > I'm just getting started on fiddling with libpq.  I am wondering why
> > > this passage from man libpq doesn't address this issue?  I'm not being
> > > a smarty here, I just don't know the answer.
> >
> > >  PQftype returns the field type associated with  the
> > >               given  field  index.  The  integer  returned  is an
> > >               internal coding of the type.
> >
> > Unless I missed what D'Arcy was getting at, his point was that when
> > PQftype tells you the field type is, say, 23, how do you know what
> > that means?

do "select * from pg_type where oid=23" and work from there on.

The 'internal coding' actually means OID for that type definition row.
(Could someone post a patch for docs ?)

the base types ids are quite stable and could possibly be found in some
.h file,
but anything new you add gets o quite random OID.

------------------
Hannu