return sort.offset != null || sort.fetch != null;
}
@Override
public void onMatch(RelOptRuleCall call) {
final SortRel incomingSort = call.rel(0);
final RelTraitSet incomingTraits = incomingSort.getTraitSet();
RelNode input = incomingSort.getChild();
// if the Optiq sort rel includes a collation and a limit, we need to create a copy the sort rel that excludes the
// limit information.
if (!incomingSort.getCollation().getFieldCollations().isEmpty()) {
input = incomingSort.copy(incomingTraits, input, incomingSort.getCollation(), null, null);
}
RelNode convertedInput = convert(input, input.getTraitSet().plus(DrillRel.DRILL_LOGICAL));
call.transformTo(new DrillLimitRel(incomingSort.getCluster(), convertedInput.getTraitSet().plus(DrillRel.DRILL_LOGICAL), convertedInput, incomingSort.offset, incomingSort.fetch));
}