Luke Lonergan wrote:
> Bruce,
> We have a bitmap index AM in Bizgres (on PG 8.1.3) that is functional and
> achieves very worthwhile (10x+) performance and space objectives.
> It is a large patch, and introduces the access method along with modifying
> the appropriate executor nodes.  The latter part was necessary because of
> the need to bypass the in-memory bitmap index when an on-disk bitmap is
> available.
> Because this patch is large, how do you suggest we go through review?  Also,
> there is some further work that Jie is doing to support efficient
> multi-column indexes that will simplify the code, so we're not quite ready
> for patch submission.

Well, post a URL of the patch, and keep working on it.  When it is
ready, let us know.

  Bruce Momjian

  + If your life is a hard drive, Christ can be your backup. +

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TIP 9: In versions below 8.0, the planner will ignore your desire to
       choose an index scan if your joining column's datatypes do not

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