Re: [HACKERS] Re: possible row locking bug in 7.0.3 & 7.1

From: Philip Warner <pjw(at)rhyme(dot)com(dot)au>
To: Hiroshi Inoue <Inoue(at)tpf(dot)co(dot)jp>
Cc: "Mikheev, Vadim" <vmikheev(at)SECTORBASE(dot)COM>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-sql(at)postgresql(dot)org, pgsql-hackers(at)postgresql(dot)org
Subject: Re: [HACKERS] Re: possible row locking bug in 7.0.3 & 7.1
Date: 2001-03-30 06:14:54
Message-ID: 3.0.5.32.20010330161454.020a0430@mail.rhyme.com.au
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At 13:16 30/03/01 +0900, Hiroshi Inoue wrote:
>Philip Warner wrote:
>>
>> At 19:14 29/03/01 -0800, Mikheev, Vadim wrote:
>> >> >Reported problem is caused by bug (only one tuple version must be
>> >> >returned by SELECT) and this is way to fix it.
>> >> >
>> >>
>> >> I assume this is not possible in 7.1?
>> >
>> >Just looked in heapam.c - I can fix it in two hours.
>> >The question is - should we do this now?
>> >Comments?
>>
>> It's a bug; how confident are you of the fix?
>>
>
>I doubt if it's a bug of SELECT.

No idea where the bug is, but SELECT should never return two versions of
the *same* row.

>'Well what
>'concurrent UPDATE then SELECT FOR UPDATE +
>SELECT' return ?

No idea, maybe Vadim or Tom can help?

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