Re: COPY ... FROM and index usage

From: Reg Me Please <regmeplease(at)gmail(dot)com>
To: "Josh Tolley" <eggyknap(at)gmail(dot)com>
Cc: "Postgres General" <pgsql-general(at)postgresql(dot)org>
Subject: Re: COPY ... FROM and index usage
Date: 2007-11-04 15:15:33
Message-ID: 200711041615.33405.regmeplease@gmail.com
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Il Sunday 04 November 2007 14:59:10 Josh Tolley ha scritto:
> On 11/4/07, Reg Me Please <regmeplease(at)gmail(dot)com> wrote:
> > Hi all.
> >
> > I'd like to know whether the indexes on a table are updated or not during
> > a "COPY ... FROM" request.
> >
> > That is, should I drop all indexes during a "COPY ... FROM" in order to
> > gain the maximum speed to load data?
> >
> > Thanks.
>
> Although questions of "which is faster" often depend very heavily on
> the data involved, the database schema, the hardware, etc., typically
> people find it best to drop all indexes during a large import and
> recreate them afterward.
>
> - Josh/eggyknap

This sounds very reasonable to me.
But the first question remains unanswered:

Are the indexes updated during the COPY ... FROM ?

Thanks again.

--
Reg me Please

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