Generate an access path plan for each as well as
checking some tkprof output and you'll see why this is
the case.
hth
connor
- Daniel Wisser <daniel.wisser_at_isis-papyrus.com>
wrote: > hi!
>
> to speed up queries i have created a bitmap index on
> a column
> that contains 2 chars as a maximum. to my surprise
> the bitmap
> index does not make the query quicker than the
> 'usual' B-tree
> index, though there are only bout 100 different
> values in
> half a million rows.
>
> has n.e.one got experience with bitmap indices? are
> there any
> further poosibilities to adapt them when creating???
>
> tia & bye
>
> daniel
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Received on Mon Apr 29 2002 - 11:58:35 CDT