From: AJ Weber <aweber@comcast.net>
To: pgsql-performance@postgresql.org
Subject: Re: how to improve perf of 131MM row table?
Date: Thu, 26 Jun 2014 11:48:27 -0400
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FWIW: I tested removing the quotes around each value, and it did not
change the plan (I am a little surprised too, but I guess PG is "smarter
than that").
Thanks for the idea.
On 6/26/2014 11:38 AM, AJ Weber wrote:
> I noticed this too. I am trying to find where the actual SQL is
> generated, and I am seeing if this is an artifact of Hibernate.
>
> Will test the same query without the quotes as you recommend. (But I
> don't know where to fix that, if it is the actual issue, unfortunately.)
>
> On 6/26/2014 11:35 AM, Claudio Freire wrote:
>> On Thu, Jun 26, 2014 at 10:26 AM, AJ Weber <aweber@comcast.net> wrote:
>>> OK, the sample query is attached (hopefully attachments are allowed) as
>>> "query.sql".
>>> The "master table" definition is attached as "table1.sql".
>>> The "detail table" definition is attached as "table2.sql".
>>> The EXPLAIN (ANALYZE, BUFFERS) output is here:
>>> http://explain.depesz.com/s/vd5
>>
>> I think the problem is that you're sending strings in the ids, instead
>> of integers.
>>
>> Remove the quotes, leave only the numbers. That will make pg able to
>> infer that node.id = prop.node_id means it can also use an index on
>> alf_node_properties.
>>
>> I think.
>>
>> Try.
>
>
>
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To: pgsql-performance@postgresql.org
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Subject: Re: how to improve perf of 131MM row table?
In-Reply-To: <53AC40CB.9020006@comcast.net>
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