Re: [HACKERS] psql nested queries with 2000+ records

From: Coronach <coronach(at)hill-b-073(dot)resnet(dot)purdue(dot)edu>
To: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgreSQL(dot)org, vadim(at)sable(dot)krasnoyarsk(dot)su (Vadim B(dot) Mikheev)
Subject: Re: [HACKERS] psql nested queries with 2000+ records
Date: 1998-03-21 06:12:07
Message-ID: 3.0.5.32.19980321011207.007eb100@diety.conclave.org
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>select * into games2 from games;

amusements=> select * into games2 from games;
ERROR: parser: parse error at or near "games2"

But, I just dumped it and changed a few things to fit the scenario...

>explain select name from games where name in (select name from games2 where
>name like 'A%');

amusements=> explain select name from games where name in (select name from
game
s2 where name like 'A%');
NOTICE: QUERY PLAN:

Seq Scan on games (cost=207.95 size=446 width=12)
SubPlan
-> Seq Scan on games2 (cost=10.23 size=1 width=12)

EXPLAIN

Upon execution of the query, it still took quite a long time.

>causing the problem. I assume you have run vacuum and vacuum analyze.

Yep, ran vacuum on it and also had it work with newly generated databases too.

Any other suggestions would be welcome, thanks

-Coronach(at)hill-b-073(dot)resnet(dot)purdue(dot)edu

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