On Mon, 17 Jul 2006, Jie Zhang wrote:
> Hi,
>
> I have posted a patch to the CVS head for on-disk bitmap index to
> pgsql-patches. If this can get in 8.2, that would be great. Any comments and
> suggestions are welcome.
>
> I still need to add several items:
>
> (1) README file in src/backend/access/bitmap.
> (2) Bitmap index documentation.
> (3) Hiding the internal btree.
>
> Also, I have disabled the multi-column index support because there is a
> known problem. Assume that there is a bitmap index on a and b. When a query
> predicate has only a, the current code may generate a wrong result. That's
> because the current code assumes that b is null. The ultimate problem is
> because the search code only handles one bitmap vector now. I need a fix to
> support manipulating multiple bitmap vectors.
>
> If you find any other problems, please let me know.
Is anyone else looking at this patch? I am reviewing it with Jie, tidying
it up and trying to solve some of the problems mentioned above. If anyone
wants to take a look at us, please ask for an updated patch.
Thanks,
Gavin