Re: Is there a batch/bulk UPDATE syntax available?

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От Gnanakumar
Тема Re: Is there a batch/bulk UPDATE syntax available?
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Msg-id 006601cbc45d$453847b0$cfa8d710$@com
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Ответ на Re: Is there a batch/bulk UPDATE syntax available?  (pasman pasmański <pasman.p@gmail.com>)
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Here is my UPDATE query and EXPLAIN ANALYZE output:

UPDATE query:
UPDATE MYUPDATETABLE SET ABOOLEANCOLUMN = TRUE WHERE COMPANYID = 999 AND
EMAIL1 = 'someemail@somedomain.com'

EXPLAIN ANALYZE output:
Bitmap Heap Scan on myupdatetable  (cost=190.89..16107.70 rows=45
width=1826) (actual time=31.150..31.155 rows=2 loops=1)
  Recheck Cond: (companyid = 999::numeric)
  Filter: ((email1)::text = 'someemail@somedomain.com'::text)
  ->  Bitmap Index Scan on mut_cmpid_indx  (cost=0.00..190.88 rows=9051
width=0) (actual time=13.868..13.868 rows=60206 loops=1)
        Index Cond: (companyid = 999::numeric)
Total runtime: 31.319 ms

-----Original Message-----
From: pasman pasmanski [mailto:pasman.p@gmail.com]
Sent: Friday, February 04, 2011 2:01 AM
To: gnanam@zoniac.com
Cc: pgsql-admin@postgresql.org
Subject: Re: [ADMIN] Is there a batch/bulk UPDATE syntax available?

Show us explain analyze for this update.

2011/2/3, Gnanakumar <gnanam@zoniac.com>:
> Hi,
>
> Is there a batch/bulk UPDATE query syntax available in PostgreSQL, similar
> to multirow VALUES syntax available for INSERT?
>
> INSERT Multirow VALUES syntax example:
> INSERT INTO films (code, title, did, date_prod, kind) VALUES
>     ('B6717', 'Tampopo', 110, '1985-02-10', 'Comedy'),
>     ('HG120', 'The Dinner Game', 140, DEFAULT, 'Comedy');
>
> There is a situation in my application, where I am performing lots and
lots
> of updates on individual rows. I am trying to figure out how to make the
> updates faster.
>
> Any other ideas/ways to make updates faster are highly appreciated.
>
> Regards,
> Gnanam
>
>
> --
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>


--
------------
pasman


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