Re: Bitmap Indexes: request for feedback

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От Simon Riggs
Тема Re: Bitmap Indexes: request for feedback
Дата
Msg-id 1224660765.27145.188.camel@ebony.2ndQuadrant
обсуждение исходный текст
Ответ на Re: Bitmap Indexes: request for feedback  (Gregory Stark <stark@enterprisedb.com>)
Ответы Re: Bitmap Indexes: request for feedback  (Tom Lane <tgl@sss.pgh.pa.us>)
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On Wed, 2008-10-22 at 00:00 +0100, Gregory Stark wrote:

> Actually as I recall the immediate issue was that the patch was more complex
> than necessary. In particular it reimplemented parts of the executor
> internally rather than figuring out what api was necessary to integrate it
> fully into the executor.
> 
> When we last left our heros they were proposing ways to refactor the index api
> to allow index ams to stream results to the executor in bitmap form. That
> would allow a scan of a bitmap index to return bitmap elements wholesale and
> have the executor apply bitmap operations to them along with the elements
> returned by a btree bitmap scan or other index ams.

The indexAM API has now been changed, so that is a simple matter now.

amgetbitmap() was committed on 10 April 2008.

-- Simon Riggs           www.2ndQuadrant.comPostgreSQL Training, Services and Support



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