On Thu, 2006-11-09 at 18:49 +0100, Martijn van Oosterhout wrote: > Nice idea, just one question:
> It seems to me that bitmap index scans will get these same > characteristics also, right? The bitmap scan will have to follow the > chain of any possibly matching tuple in any of the blocks that are in > the bitmap, right? Yes, they would identify the root tuples. The whole chain has matching index values, by definition, so the re-evaluation for lossy bitmaps will work just the same before the actual tuple is retrieved by walking the chain (if required). -- Simon Riggs EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 7: You can help support the PostgreSQL project by donating at http://www.postgresql.org/about/donate
