Re: anti-join chosen even when slower than old plan

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To: Tom Lane <tgl@xxxxxxxxxxxxx>
Subject: Re: anti-join chosen even when slower than old plan
From: Grzegorz JaÅkiewicz <gryzman@xxxxxxxxx>
Date: Wed, 10 Nov 2010 05:36:59 +0000
Cc: Kevin Grittner <Kevin.Grittner@xxxxxxxxxxxx>, pgsql-performance@xxxxxxxxxxxxxx
In-reply-to: <20961.1289347680@xxxxxxxxxxxxx>
References: <4CD9663502000025000374B1@xxxxxxxxxxxxxxx> <20961.1289347680@xxxxxxxxxxxxx>

you're joining on more than one key. That always hurts performance.

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References:
- anti-join chosen even when slower than old plan
  - From: Kevin Grittner
- Re: anti-join chosen even when slower than old plan
  - From: Tom Lane

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