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dfQryOpt()
Query optimizer
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Syntax:

     dfQryOpt(<aQuery>,<aSeq>,<aQryOpt>) --> aQryOpt

Parameters:

     <aQuery>   descriptive Array of the query
     <aSeq>     Sequence with which process the query
     <aQryOpt>  Array at the exit of dfQryOpt contained in the optimized
                query.

Returns:

     <aQryOpt> An array that contains values optimized by the query
     optimizer

Description:

     This functions role to the query array is to create a Key, a filter
     and a value for Break on the quired database of the query

Example:

     // For an complete example of use of dfQryOpt
     // examine the source generated for a query

See also:

     ddQry(), dfPrnIni()