Re: Optimization rules for semi and anti joins - Mailing list pgsql-hackers

From Jonah H. Harris
Subject Re: Optimization rules for semi and anti joins
Date
Msg-id 36e682920902101709n392e081fw57662a084ad87b0f@mail.gmail.com
Whole thread Raw
In response to Optimization rules for semi and anti joins  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: Optimization rules for semi and anti joins
List pgsql-hackers
On Tue, Feb 10, 2009 at 3:10 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
I wrote (in response to Kevin Grittner's recent issues):
> Reflecting on this further, I suspect there are also some bugs in the
> planner's rules about when semi/antijoins can commute with other joins;

After doing some math I've concluded this is in fact the case.  Anyone
want to check my work?

FWIW, the logic looks correct to me.

--
Jonah H. Harris, Senior DBA
myYearbook.com

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