A small comment on Oracle's implementation of persistent bitmap indexes:
Oracle's bitmap index is concurently locked by DML, i.e. it suites for OLAP
(basically read only data warehouses) but in no way for OLTP.
IMHO,
Laimis
> Maybe the lack of heap/btree consistent ordering in Oracle
> and their subsequent design choice of persistent bitmap
> indices is an indication for PostgreSQL too?