Re: suggestion

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От Tom Lane
Тема Re: suggestion
Дата
Msg-id 29115.1140756347@sss.pgh.pa.us
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Ответ на Re: suggestion  ("Jan Cruz" <malebug@gmail.com>)
Ответы Re: suggestion  ("Jan Cruz" <malebug@gmail.com>)
Re: suggestion  (Lukas Smith <smith@pooteeweet.org>)
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"Jan Cruz" <malebug@gmail.com> writes:
> On 2/24/06, Michael Glaesemann <grzm@myrealbox.com> wrote:
>> If this doesn't do what you want, can you give a bit more
>> explanation? Also, what are you trying to do with this dump file?

> I also want an option that would exclude  "CREATE INDEX "  whenever
> a schema is being dump

> The reason for this is that whenever I tried to migrate database
> whenever I restore a schema with indexes and then
> restore the data separately it took more or less 24 hours instead of
> the usual 1 hour more or less.

Restoring schema and data separately is guaranteed to be less efficient
than restoring a combined dump.  An option to omit indexes from the
schema dump will not fix this.  Indeed it will arguably make things
worse --- in the first place there are severe performance issues
associated with unindexed foreign-key checks, and in the second place
there is the foot-gun problem that you might forget to re-add the
indexes at all.

I think the right question to ask here is "why are you so intent on
using separate schema/data restores?"  That's not the recommended way
to go about things, and it never will be.
        regards, tom lane


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