From: | Szymon Guz <mabewlun(at)gmail(dot)com> |
---|---|
To: | Seb <spluque(at)gmail(dot)com> |
Cc: | PostgreSQL <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: break table into portions for writing to separate files |
Date: | 2014-05-01 20:17:24 |
Message-ID: | CAFjNrYtYE0W1iETjSSOyHtJn=H0hzkRmK2h7GariGHKqr-Y+2Q@mail.gmail.com |
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Lists: | pgsql-general |
On 1 May 2014 21:01, Seb <spluque(at)gmail(dot)com> wrote:
> On Thu, 1 May 2014 20:22:26 +0200,
> Szymon Guz <mabewlun(at)gmail(dot)com> wrote:
>
> > Hi, several Gb is about 1GB, that's not too much. In case you meant
> > 'several GB', that shouldn't be a problem as well.
>
> Sorry, I meant several GB. Although that may not be a problem for
> PostgreSQL, it is for post-processing the output file with other tools.
>
>
> > The first thing I'd do would be creating an index on the column used
> > for dividing the data. Then I'd just use the command COPY with a
> > proper select to save the data to a file.
>
> I should have mentioned that this is quite a complex view (not a table),
> which joins several other views of similar complexity. I'm not sure
> whether indexes are useful/feasible in this case. I'll investigate.
>
Yes, indexes can be used to speed up the view as well. Such a view is
nothing more than just a query.
regards,
Szymon
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