Re: pgsql: Use new overflow aware integer operations.

From: Andres Freund <andres(at)anarazel(dot)de>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-committers(at)postgresql(dot)org
Subject: Re: pgsql: Use new overflow aware integer operations.
Date: 2017-12-22 23:16:42
Message-ID: D060B40F-5781-4981-B853-509D06E7DCD0@anarazel.de
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On December 22, 2017 7:52:54 PM GMT+01:00, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>Andres Freund <andres(at)anarazel(dot)de> writes:
>> On 2017-12-22 11:00:54 -0500, Tom Lane wrote:
>>> I do not think it is reasonable for these functions to not set the
>>> output variable at all in the overflow case; it is not their job
>>> to opine on whether the caller may use the result.
>
>> I don't agree. Please note that that the function's documentation
>> explicitly says "The content of *result is implementation defined in
>> case of overflow.".
>
>I will not accept an implementation that spews compiler warnings
>all over the place, which is what this one is doing. Please fix that,
>or else I will.

Are you seriously implying that I'm suggesting that we live with a warning / that I refuse to fix one? All I was saying is that I don't want to exactly define which value *result is set to in case of overflow. Without having resolved the discussion of semantics it just seemed pointless to start fixing...

Andres
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