Not-So-New Bit-Mapped Indices (WAS Re: Bit-Mapped Indexing Routines---Beta Testers Wanted)

David Walrath (walrath_at_sybase.com) wrote:
> Incidentally, I wonder what the original poster meant by bitmap indexes
> being "relatively new" in databases. Low cardinality bitmap indexes
> were in Model 204 well over 20 years ago, so maybe he/she meant
> relative to punch-card databases ?
> ...
> Opinions are my own; my employer doesn't want them.

FWIW, Burroughs' DMSII also had them by the time I got to it in '77...

-- 
Barry Johnson  -  BJohnson_at_WorldBank.Org