question: returns the bitkey of columns that constrain this aggregation . concode_field_sep RolapStar star concode_elem_sep BitKey constrainedColumnsBitKey concode_elem_sep int hashCode concode_elem_sep List<StarPredicate> compoundPredicateList concode_field_sep boolean equal concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep int computeHashCode concode_elem_sep int computeHashCode concode_elem_sep String toString concode_elem_sep RolapStar getStar concode_elem_sep List<StarPredicate> getCompoundPredicateList concode_elem_sep List<String> getCompoundPredicateStringList
target: BitKey function ( ) { return constrainedColumnsBitKey ; }