Re: [GENERAL] Loose indexscan and partial indexes - Mailing list pgsql-general

From Peter J. Holzer
Subject Re: [GENERAL] Loose indexscan and partial indexes
Date
Msg-id 20170210140432.GB8667@hjp.at
Whole thread Raw
In response to Re: [GENERAL] Loose indexscan and partial indexes  (Thomas Kellerer <spam_eater@gmx.net>)
List pgsql-general
On 2017-02-10 14:24:36 +0100, Thomas Kellerer wrote:
> Peter J. Holzer schrieb am 10.02.2017 um 14:02:
> > So it's doing a sequential scan on the initial select in the recursive
> > CTE, but using the index on the subsequent selects.
> >
> > But why? If it uses the index on
> >     SELECT MIN(periodizitaet) FROM facttable_imf_ifs WHERE periodizitaet > 'x'
> > shouldn't it be able to use the same index on
> >     SELECT MIN(periodizitaet) FROM facttable_imf_ifs
>
> What is the definition of the index facttable_imf_ifs_periodizitaet_idx?

The solution to the puzzle was just 2 paragraphs further down.

Looks like I have to practice this arc of suspense thing ;-)

        hp

--
   _  | Peter J. Holzer    | A coding theorist is someone who doesn't
|_|_) |                    | think Alice is crazy.
| |   | hjp@hjp.at         | -- John Gordon
__/   | http://www.hjp.at/ |    http://downlode.org/Etext/alicebob.html

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