| From: | "Florian G(dot) Pflug" <fgp(at)phlo(dot)org> |
|---|---|
| To: | "Florian G(dot) Pflug" <fgp(at)phlo(dot)org>, Theo Schlossnagle <jesus(at)omniti(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, RPK <rohitprakash123(at)indiatimes(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: New feature request: FlashBack Query |
| Date: | 2007-02-21 15:09:08 |
| Message-ID: | 45DC6094.9060809@phlo.org |
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| Lists: | pgsql-hackers |
Alvaro Herrera wrote:
> Florian G. Pflug wrote:
>
>> However, I just realized that doing this is much harder than I initially
>> thought, because catalog access always happens with SnapshotNow, and
>> e.g. "drop table" deletes datafiles at commit time, and not during vacuum.
>
> Not to mention the likenesses of CLUSTER and TRUNCATE, which would need
> to be taught how to keep the old datafiles for an additional week/hour.
>
> What I don't understand is why people isn't working in improving
> contrib/spi/timetravel.
Because it serves different usecase I think - flashback is an
administrative tool, not something you design your application around.
Flashback is more similar to PITR recovery than to contrib/spi/timetravel.
greetings, Florian Pflug
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