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Re: Bitmap Indexes: request for feedback

Simon Riggs <simon@2ndquadrant.com>

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From: Simon Riggs <simon@2ndQuadrant.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Gregory Stark <stark@enterprisedb.com>, josh@agliodbs.com, pgsql-hackers@postgresql.org, Gianni Ciolli <gianni.ciolli@2ndquadrant.it>, Gabriele Bartolini <gabriele.bartolini@2ndquadrant.it>
Date: 2008-10-22T12:43:52Z
Lists: pgsql-hackers 
On Wed, 2008-10-22 at 08:31 -0400, Tom Lane wrote:
> Simon Riggs <simon@2ndQuadrant.com> writes:
> > On Wed, 2008-10-22 at 00:00 +0100, Gregory Stark wrote:
> >> 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.
> 
> > The indexAM API has now been changed, so that is a simple matter now.
> 
> No, that was merely one component of the problem.  The APIs for
> tidbitmaps need revision too.  You can't "stream" a bitmap yet.

Please explain further.

Which calls? Why do we need to stream them?

-- 
 Simon Riggs           www.2ndQuadrant.com
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