[PATCH]-hash index improving

From: "Xiao Meng" <mx(dot)cogito(at)gmail(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Cc: "Kenneth Marshall" <ktm(at)rice(dot)edu>, "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com>
Subject: [PATCH]-hash index improving
Date: 2008-07-17 09:26:38
Message-ID: ded849dd0807170226h7c8df076p77aa0a3f86713add@mail.gmail.com
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The patch store hash code only in the index tuple.
It based on Neil Conway's patch with an old version of PostgreSQL.
It passes the regression test but I didn't test the performance yet.
Anyone interested can make a performance test;-)
You can undefine the macro HASHVALUE_ONLY in hash.h to get the
original implementation.
It's a preliminary implementation and I'm looking for input here.
Hope to hear from you.

Best Regards,
Xiao Meng

DKERC, Harbin Institute of Technology, China
Gtalk: mx(dot)cogito(at)gmail(dot)com
MSN: cnEnder(at)live(dot)com

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