Re: After upgrading libpq, the same function(PQftype) call returns a different OID

You are right Adrian, I did not search properly I found the header file here:

sf(at)toro:/opt3/dbs/pgs/17.4$ ls -l include/postgresql/server/catalog/pg_type_d.h
-rw-r--r-- 1 sf sf 9672 Mar 13 17:05 include/postgresql/server/catalog/pg_type_d.h

I was not expecting this file to be in a "server" folder, when it's to be used for client apps.

And still, I do not trust the content.

Seb

________________________________
From: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
Sent: Tuesday, March 18, 2025 7:41 PM
To: Sebastien Flaesch <sebastien(dot)flaesch(at)4js(dot)com>; Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>; M Tarkeshwar Rao <m(dot)tarkeshwar(dot)rao(at)ericsson(dot)com>
Cc: pgsql-general(at)postgresql(dot)org <pgsql-general(at)postgresql(dot)org>
Subject: Re: After upgrading libpq, the same function(PQftype) call returns a different OID

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On 3/16/25 02:30, Sebastien Flaesch wrote:
>
> Hello,
>
> I think the column type identification with PQftype() needs some
> review/clarification.
>
> It's a pity that libpq does not have an API to return directly the
> actual type name of a column.
>
> The doc
> <https://urldefense.com/v3/__https://www.postgresql.org/docs/17/libpq-exec.html*LIBPQ-PQFTYPE__;Iw!!I_DbfM1H!BrhvYoUAjZeszdg-ZMusy9M6WcTcHnTVpF22U_PzygM-UxQsQ0oa34TMFyp3Asr6-8L3nJQDSkUR9533wp_t-V3RsEXlNg$ > says:
>
> You can query the system table |pg_type| to obtain the names and
> properties of the various data types. *The OIDs of the built-in data
> types are defined in the file |catalog/pg_type_d.h| in the
> PostgreSQL installation's |include| directory.*
>
> After building PostgreSQL *17.4* from the sources, I cannot find this
> pg_type_d.h header file in the installation directory. Maybe I am
> missing some configure option?

Went I built from source in ended up in:

/usr/local/pgsql/include/server/catalog/

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com