Exactly. I think the best solution is use the param. view for the first selection ( instead of the set key ), then on the subset ( generally not a big table ) apply whatever filters to the view with set filter. This is because you generally need a lot of different ( sometimes not optimizable ) subsets of the view.

>Jaime,
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>Then the optimization of the select the view is based on should be checked.
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>>I think so too, theorically. OTOH, there are some work-intensive grids, that are based on chunks of data from big tables, where the requery takes a long time, and this can be sometimes inacceptable.