Re: Bitmap Indexes: request for feedback

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.comPostgreSQL Training, Services and Support