| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Mark Kirkwood <markir(at)coretech(dot)co(dot)nz>, josh(at)agliodbs(dot)com, pgsql-hackers(at)postgresql(dot)org, Chris Browne <cbbrowne(at)acm(dot)org> |
| Subject: | Re: plans for bitmap indexes? |
| Date: | 2004-11-04 05:07:02 |
| Message-ID: | 20933.1099544822@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> Updated TODO:
> * Allow the creation of bitmap indexes which can be quickly combined
> with other bitmap indexes
This TODO item description is fundamentally misleading.
The point was *not* about making "bitmap indexes", which on its face
suggests a persistent on-disk data structure comparable to our existing
index types. The point was about using transient in-memory bitmaps as
an interface between the on-disk indexes and accessing the table proper.
regards, tom lane
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