Kjell Rilbe wrote:

> My index selectivity is currently 0.125 (freshly calculated). Could that
> be the "problem"?

I'm now down to selectivity 0.066667 (freshly calculated). Same result.

But on the other hand, I've got 361 nulls among a total of 581 records.
Does Firbird detect this and decide that indices are of no use?

Thanks,
Kjell
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Kjell Rilbe
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