Re: Update taking forever

From: Bianca Stephani <bianca(dot)stephani(at)gmail(dot)com>
To: "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
Cc: "pgsql-novice(at)postgresql(dot)org" <pgsql-novice(at)postgresql(dot)org>
Subject: Re: Update taking forever
Date: 2015-06-15 12:30:14
Message-ID: CAL5He_dvuhvDRLQbc-9vDySRc6adhPPR0nkzMbGzkJNvNhcXQw@mail.gmail.com
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On Mon, Jun 15, 2015 at 9:17 AM, David G. Johnston <
david(dot)g(dot)johnston(at)gmail(dot)com> wrote:

> On Monday, June 15, 2015, Bianca Stephani <bianca(dot)stephani(at)gmail(dot)com>
> wrote:
>
>> Hi everyone.
>> I want to update the value of a column of 25 thousand rows and a sql
>> update is taking forever (literally, more then one day). There's any other
>> way so i can do that?
>>
>
> This would normally takes seconds (at most) if everything is working
> properly, so yes. I would suspect your where clause is not using an index
> to find those rows and there are a lot more than 25k rows on the table in
> question. Show us schemas and explain output if you want a more definitive
> answer.
>

Ops, i must have looked on the wrong place. There are 420k rows.
My update have no "where" clause because i want to update all rows. I'm
adding two columns to the table and i'm setting one of them with a select
count and the other with the result of a recursive sql (defined before the
update, not at each row).

> Or you have locking issue...
>
> David J.
>

--
Bianca Stephani.

*"Killing time before time kill us""Panic called you out and took you in,
giving you an easy game and letting you win""Who's gonna love you when you
reach the end?""A diferença entre a vida e a arte é que a arte é mais
suportável""Smile like you mean it""I told you I was brave, but I've
lied""If you don't do anything, nothing can happen"*

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