Re: BUG #5629: ALTER SEQUENCE foo START execute a RESTART

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От Alexsander Rosa
Тема Re: BUG #5629: ALTER SEQUENCE foo START execute a RESTART
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Msg-id AANLkTin1WD3ou9=Qm2KGwYL6GLijPWO_5M3cx_Ob68qU@mail.gmail.com
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Ответ на Re: BUG #5629: ALTER SEQUENCE foo START execute a RESTART  (Bruce Momjian <bruce@momjian.us>)
Ответы Re: BUG #5629: ALTER SEQUENCE foo START execute a RESTART  (Bruce Momjian <bruce@momjian.us>)
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At 8.4 release notes, item "E.5.3.3.1. TRUNCATE" there's a sentence:
"The start value of a sequence can be changed by ALTER SEQUENCE START WITH.
"

Maybe this sentence should be copied/moved to "E.5.3.4.1. ALTER" with extra
text stating that START, in previous versions, was an (unintended) alias to
RESTART -- with the wording you suggested or something like that. The advise
to check server_version when using this command could be mentioned, also.

2010/9/8 Bruce Momjian <bruce@momjian.us>

> Alexsander Rosa wrote:
> > Well, if it's not going to be fixed, then at least the docs should be
> > revised to warn all 8.4+ users to avoid this command and, if it's really
> > needed, always check the server version before using the ALTER SEQUENCE
> ...
> > START command, once it has a potentially hazardous bug that interprets it
> as
> > a RESTART in 8.3 version and below.
>
> The proper place for such notification is the 8.4 release notes, which
> states:
>
>       Sequences now contain an additional 'start_value'
>       column (Zoltan Boszormenyi)
>
>       This supports <command>ALTER SEQUENCE ... RESTART.
>
> Which means basically 8.3 didn't have a start field at all.
>
> This is the first complaint I have heard about it. Do you have new
> wording to suggest?  Perhaps:
>
>        In previous releases, START behaved as RESTART.
>
> ---------------------------------------------------------------------------
>
>

--
Atenciosamente,
Alexsander da Rosa
Linux User #113925

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