Re: Help with indexes

Hi ,

I recently upgraded from 7.1.3 to 7.2.1 and performance improvements
are immense , mainly (i feel) becoz of better index utilization by the
planner.

i strongly feel its worth taking the trouble of upgrading...


regds
mallah.

On Friday 10 May 2002 12:33 am, James Orr wrote:
> Never mind.  I got it running faster.
>
> On Thu, 9 May 2002, James Orr wrote:
> > Hi,
> >
> > I need some help with this query, which is currently taking minutes to
> > run (it needs to be seconds!).
> >
> > SELECT
> >     UPPER(teams.team_name),
> >     players.first_name,
> >     players.last_name,
> >     NULL,
> >     teams.id,
> >     brackets.court,
> >     teams.team_number
> > FROM
> >     teams JOIN
> >     players ON (teams.id = players.team) JOIN
> >     brackets ON (teams.id = brackets.team)
> > WHERE
> >     players.player_number = 1 AND
> >     teams.complete AND
> >     brackets.court = 580
> > ORDER BY
> >     brackets.game_order,
> >     teams.team_name
> > ;
> >
> > When I run it with EXPLAIN I get ...
> >
> >
> > Sort  (cost=3.15..3.15 rows=1 width=60)
> >   ->  Nested Loop  (cost=0.00..3.14 rows=1 width=60)
> >         ->  Nested Loop  (cost=0.00..2.12 rows=1 width=48)
> >               ->  Seq Scan on players  (cost=0.00..1.05 rows=1 width=28)
> >               ->  Seq Scan on teams  (cost=0.00..1.04 rows=2 width=20)
> >         ->  Seq Scan on brackets  (cost=0.00..1.01 rows=1 width=12)
> >
> > Now the indexes I have are:
> > On table players  - unique btree on id
> >                   - unique btree on team, player_number
> > On table teams    - unique btree on id
> > On table brackets - btree on court
> >                   - btree on team
> >                   - unique btree on court, team
> >
> > This is on version 7.1.3.  Would upgrading to 7.2 make it faster?
> >
> > - James
> >
> >
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--
Rajesh Kumar Mallah,
Project Manager (Development)
Infocom Network Limited, New Delhi
phone: +91(11)6152172 (221) (L) ,9811255597 (M)

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