pub fn normalize_sort_requirement(
sort_requirement: PhysicalSortRequirement,
eq_classes: &[EquivalentClass],
ordering_eq_classes: &[OrderingEquivalentClass]
) -> PhysicalSortRequirement
pub fn normalize_sort_requirement(
sort_requirement: PhysicalSortRequirement,
eq_classes: &[EquivalentClass],
ordering_eq_classes: &[OrderingEquivalentClass]
) -> PhysicalSortRequirement