Re: About "Our CLUSTER implementation is pessimal" patch - Mailing list pgsql-hackers

From Takahiro Itagaki
Subject Re: About "Our CLUSTER implementation is pessimal" patch
Date
Msg-id 20100121173419.D19E.52131E4D@oss.ntt.co.jp
Whole thread Raw
In response to Re: About "Our CLUSTER implementation is pessimal" patch  (Leonardo F <m_lists@yahoo.it>)
Responses Re: About "Our CLUSTER implementation is pessimal" patch  (Leonardo F <m_lists@yahoo.it>)
Re: About "Our CLUSTER implementation is pessimal" patch  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
Leonardo F <m_lists@yahoo.it> wrote:

> Anyone? I'd like some feedback before moving on to do the seq scan + sort in those
> CLUSTER cases where "use_index_scan" returns false...

+1 for CLUSTER using sort.

I have a couple of comments for the current implementation:* Do we need to disable sort-path for tables clustered on a
gistindex?* I'd prefer to separate cost calculation routines from create_index_path()  and cost_sort(), rather than
usinga dummy planner.
 

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




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