Plenty of analytical databases still use indexes; bitmap indexes, date ranges, "clustered" indexes and even ordered/btree indexes all still come in handy becaus

Plenty of analytical databases still use indexes; bitmap indexes, date ranges, "clustered" indexes and even ordered/btree indexes all still come in handy because they can all help whittle down queries from billions to millions of records. They just need to be ready to do efficient full table scans.