Re: Why overhead of SPI is so large?

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От Tom Lane
Тема Re: Why overhead of SPI is so large?
Дата
Msg-id 30691.1574365477@sss.pgh.pa.us
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Ответ на Re: Why overhead of SPI is so large?  (Pavel Stehule <pavel.stehule@gmail.com>)
Ответы Re: Why overhead of SPI is so large?
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Pavel Stehule <pavel.stehule@gmail.com> writes:
> čt 21. 11. 2019 v 10:31 odesílatel Konstantin Knizhnik <
> k.knizhnik@postgrespro.ru> napsal:
>> With contain_mutable_functions the patch becomes trivial.

> Stable functions doesn't need own snapshot too, so it is not fully correct,
> but it is on safe side.

No, I doubt that.  A stable function is allowed to inspect database state,
and if it's being called by a volatile function, it has every right to
expect that it'd see updates-so-far made by the volatile function.

            regards, tom lane



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