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. Thanks, Jie ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
