| 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 |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
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
http://xiaomeng.yo2.cn
| Attachment | Content-Type | Size |
|---|---|---|
| hash.patch | text/x-diff | 10.3 KB |
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