I'm thinking, could it be better to use filtered index instead.

E.g. currently I do:

scan for m.plError=.f. and SearchTB = m.lcSearch and not empty(InsCommand)

May be it would be faster to set a filtered index and do seek, when scan while?

However, as I recall, I tried similar idea (in another context, though) and it actually slowed it down.

>

INDEX ON EMPTY (MyField) TAG E_MyField
>SET FILTER TO NOT EMPTY (MyField)

HTH
>
>>If I want to filter all non-empty values for character (100) field, what would be the best expression for the index (if I need the index)?