Re: [HACKERS] psql nested queries with 2000+ records
От | Bruce Momjian |
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Тема | Re: [HACKERS] psql nested queries with 2000+ records |
Дата | |
Msg-id | 199803211454.JAA06103@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: [HACKERS] psql nested queries with 2000+ records (Coronach <coronach@hill-b-073.resnet.purdue.edu>) |
Ответы |
Re: [HACKERS] psql nested queries with 2000+ records
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Список | pgsql-hackers |
> > >select * into games2 from games; > > amusements=> select * into games2 from games; > ERROR: parser: parse error at or near "games2" Oops, we haven't released 6.3p1 yet, so 'select * into table games2 from games;' > > 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. Try it without the LIKE, with just an equals. -- Bruce Momjian | 830 Blythe Avenue maillist@candle.pha.pa.us | Drexel Hill, Pennsylvania 19026 + If your life is a hard drive, | (610) 353-9879(w) + Christ can be your backup. | (610) 853-3000(h)
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