Re: After ~Crash Sequence not correct

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От Mikheev, Vadim
Тема Re: After ~Crash Sequence not correct
Дата
Msg-id 3705826352029646A3E91C53F7189E32518454@sectorbase2.sectorbase.com
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Ответ на After ~Crash Sequence not correct  ("Henshall, Stuart - WCP" <SHenshall@westcountrypublications.co.uk>)
Ответы Re: After ~Crash Sequence not correct
Список pgsql-bugs
> I have verified that killing the postmaster after a few nextval's
> leaves things in a bad state after restart.
>
> I think I see the problem: in nextval(), the sequence data written to
> the WAL log is different from that written to the data page.  Isn't
> that bogus?

It was made to avoid WAL-loging on each nextval call, ie it should work
like OID pre-fetching: value stored in WAL must always "exceed" values
returned by nextval so on the after-crash-restart sequence should be
advanced to value which was never returned by nextval (for non-cycled
sequences). Maybe I made some mistakes in implementation?

Vadim

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