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Re: query decorrelation in postgres

From: Itagaki Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp>
To: mahendra chavan <mahcha(at)gmail(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: query decorrelation in postgres
Date: 2009-07-24 01:02:25
Message-ID: 20090724095459.93D7.52131E4D@oss.ntt.co.jp (view raw or flat)
Thread:
Lists: pgsql-hackers
mahendra chavan <mahcha(at)gmail(dot)com> wrote:

> I am a master's student in computer science at IIT Bombay. As part of my
> project, I need to get a decorrelated version of a SQL query.  Please could
> anyone let me know if we have query decorrelation feature implemented in
> postgres ?

What do you mean by "query decorrelation"? Is it an addtional method for
query optimization? At least there is no word 'decorrelation' in
the postgres documentation.

Regards,
---
ITAGAKI Takahiro
NTT Open Source Software Center



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