From: Ezequias R. da Rocha <ezequias@fastcon.com.br>
To: Ezequias R. da Rocha <ezequias@fastcon.com.br>
To: pgsql-sql@postgresql.org
Subject: Re: For loop
Date: Tue, 13 Mar 2007 11:32:35 -0300
Message-ID: <45F6B603.2050207@fastcon.com.br> (raw)
In-Reply-To: <20070313142744.GA7548@alvh.no-ip.org>
References: <45F69D7C.4070304@fastcon.com.br>
<45F6B4EB.A3DD.0030.0@indicator.be>
<45F6A793.1090904@fastcon.com.br>
<200703130644.20870.aklaver@comcast.net>
<45F6AF3B.4080706@fastcon.com.br>
<20070313142744.GA7548@alvh.no-ip.org>
I rewritte the Jonah's function to:
FOR iter IN 1 .. num_iter
LOOP
-- some computations
INSERT INTO carga (descricao) VALUES ('CardPass');
END LOOP;
My ID is now() by default
And it was in 23sec
After I changed the insert to:
INSERT INTO carga (id,descricao) VALUES ('2007-03-13
10:20:20','CardPass');
And it was in:
19485ms
Great don't you ?
Ezequias
Alvaro Herrera escreveu:
> Ezequias R. da Rocha wrote:
>
>> Thank you all. The function from Jonah solves my problem.
>>
>> Just a simple question:
>>
>> One million of inserctions in *28,8* seconds with this kind of data
>> (timestamp|character varring (50)) is a good performance ?
>>
>> I let my questions to DBAs from PostgreSQL.
>>
>
> I don't know, but Jonah's function can be better written using pure SQL,
> which should be faster. Something like this:
>
> create table whatever (a text, b int);
> insert into whatever
> select 'My text from iteration ' || a, a * 2
> from generate_series(1, 1000000) a;
>
> I don't claim this works as is, but you should get the hang of it.
>
>
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Subject: Re: For loop
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