|Subject||Re: [ib-support] Index on Boolean-Col|
> both you and Guido seem to imply that the value that you set with SETthis is from the language reference:
> STATISTICS is the selectivity of an index.
> AFAIK it's not, they are two different figures entirely.
> In particular, I don't think that the selectivity of an index is
> something that IB keeps track of or use. It can be much more frequently
> found in these lists than in IB's documentation. ;-)
Selectivity factor for the index; the optimizer uses index selectivity, a
measure of uniqueness for indexed columns, to choose an access
strategy for a query