Re: Why there is a PG_GETARG_UINT32 and PG_RETURN_UINT32?

From: Amit Kapila <amit(dot)kapila(at)huawei(dot)com>
To: "'Rodrigo Barboza'" <rodrigombufrj(at)gmail(dot)com>, <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Why there is a PG_GETARG_UINT32 and PG_RETURN_UINT32?
Date: 2013-04-05 04:12:31
Message-ID: 004901ce31b3$cbd14680$6373d380$@kapila@huawei.com
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On Thursday, April 04, 2013 8:30 PM Rodrigo Barboza wrote:

> Hi guys.
> I am wondering when I can use the PG_GETARG_UINT32 and PG_RETURN_UINT32.
> If postgres has no unsigned int type, what is the use of these macros?

They are mainly used for contrib module functionality or some built-in
functions which are not exposed.
For example, bt_page_items() receives relation name (text) and block number
(int), but internally the block number
is unit32 as max blocks can be oxFFFFFFFE.

With Regards,
Amit Kapila.

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