>
>A large part of the index may, or may not, be downloaded.
>
>If you have an index on deleted() - or another condition that selects many records - then Rushmore Optimization must get all the matching index values for both conditions, e.g.
PkField = lnPkValue and not deleted(). The
not deleted() part is implicit, but VFP must still do it. Since most records will be not deleted(), VFP must get almost the entire index over the network. Then, a map of bits is created in memory, and the corresponding records are bit-anded to get the result set.
>
>In this case, the ABSENCE of some indices will improve performance.
Thank you, Hilmar.
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