Re: Division by zero

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: Sam Mason <sam(at)samason(dot)me(dot)uk>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Division by zero
Date: 2009-08-02 16:32:53
Message-ID: 162867790908020932t74d7a11eq788e3bc6ccfaeb24@mail.gmail.com
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2009/8/2 Sam Mason <sam(at)samason(dot)me(dot)uk>:
> On Sun, Aug 02, 2009 at 06:03:11PM +0200, Pavel Stehule wrote:
>> 2009/8/2 Sam Mason <sam(at)samason(dot)me(dot)uk>:
>> > On Sun, Aug 02, 2009 at 05:22:45PM +0200, Pavel Stehule wrote:
>> >> 2009/8/2 Sam Mason <sam(at)samason(dot)me(dot)uk>:
>> >> > On Sun, Aug 02, 2009 at 02:20:18PM +0200, Pavel Stehule wrote:
>> >> >> There is paradox - IMMUTABLE function break inlinig :(. There is maybe bug
>> >> >
>> >> > Not in any tests I've done.
>> >>
>> >> I did it - and in this case immutable is wrong and strict not.
>> >
>> > I'm not sure what you're responding to here, but I'm pretty sure the OP
>> > wants IMMUTABLE and does not want STRICT/RETURNS NULL ON NULL INPUT.
>>
>> I checked if function was inlined or not. When I mark function as
>> strict then it was inlined. When I mark function as IMMUTABLE then it
>> wasn't inlined. That's all - you can check it too.
>
> I will be checking different things, please say what you're testing.
>

look on thread "IMMUTABLE break inlining simple SQL functions."

Pavel

> Different things are inlined in different places, its the different
> places things get inlined that cause the optimizer to do different
> things.
>
> --
>  Sam  http://samason.me.uk/
>
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