How to use

SqlSplittableAggFunction

in

org.apache.calcite.sql

  final AggregateCall call1;
  if (fieldSet.contains(ImmutableBitSet.of(aggCall.e.getArgList()))) {
   call1 = splitter.split(aggCall.e, mapping);
  } else {
   call1 = splitter.other(rexBuilder.getTypeFactory(), aggCall.e);
final Integer rightSubTotal = sides.get(1).split.get(aggCall.i);
newAggCalls.add(
  splitter.topSplit(rexBuilder, registry(projects),
    groupIndicatorCount, relBuilder.peek().getRowType(), aggCall.e,
    leftSubTotal == null ? -1 : leftSubTotal,
 if (splitter != null) {
  final RelDataType rowType = relBuilder.peek().getRowType();
  projects2.add(splitter.singleton(rexBuilder, rowType, newAggCall));

  final AggregateCall call1;
  if (fieldSet.contains(ImmutableBitSet.of(aggCall.e.getArgList()))) {
   call1 = splitter.split(aggCall.e, mapping);
  } else {
   call1 = splitter.other(rexBuilder.getTypeFactory(), aggCall.e);
final Integer rightSubTotal = sides.get(1).split.get(aggCall.i);
newAggCalls.add(
  splitter.topSplit(rexBuilder, registry(projects),
    groupIndicatorCount, newJoin.getRowType(), aggCall.e,
    leftSubTotal == null ? -1 : leftSubTotal,
  if (splitter != null) {
   projects2.add(
     splitter.singleton(rexBuilder, r.getRowType(), newAggCall));

  if (!aggCall.e.getArgList().isEmpty()
    && fieldSet.contains(ImmutableBitSet.of(aggCall.e.getArgList()))) {
   final RexNode singleton = splitter.singleton(rexBuilder,
     joinInput.getRowType(), aggCall.e.transform(mapping));
  final AggregateCall call1;
  if (fieldSet.contains(ImmutableBitSet.of(aggCall.e.getArgList()))) {
   final AggregateCall splitCall = splitter.split(aggCall.e, mapping);
   call1 = splitCall.adaptTo(joinInput, splitCall.getArgList(),
     splitCall.filterArg, oldGroupKeyCount, newGroupKeyCount);
  } else {
   call1 = splitter.other(rexBuilder.getTypeFactory(), aggCall.e);
final Integer rightSubTotal = sides.get(1).split.get(aggCall.i);
newAggCalls.add(
  splitter.topSplit(rexBuilder, registry(projects),
    groupIndicatorCount, relBuilder.peek().getRowType(), aggCall.e,
    leftSubTotal == null ? -1 : leftSubTotal,
 if (splitter != null) {
  final RelDataType rowType = relBuilder.peek().getRowType();
  projects2.add(splitter.singleton(rexBuilder, rowType, newAggCall));

  if (!aggCall.e.getArgList().isEmpty()
    && fieldSet.contains(ImmutableBitSet.of(aggCall.e.getArgList()))) {
   final RexNode singleton = splitter.singleton(rexBuilder,
     joinInput.getRowType(), aggCall.e.transform(mapping));
  final AggregateCall call1;
  if (fieldSet.contains(ImmutableBitSet.of(aggCall.e.getArgList()))) {
   final AggregateCall splitCall = splitter.split(aggCall.e, mapping);
   call1 = splitCall.adaptTo(joinInput, splitCall.getArgList(),
     splitCall.filterArg, oldGroupKeyCount, newGroupKeyCount);
  } else {
   call1 = splitter.other(rexBuilder.getTypeFactory(), aggCall.e);
final Integer rightSubTotal = sides.get(1).split.get(aggCall.i);
newAggCalls.add(
  splitter.topSplit(rexBuilder, registry(projects),
    groupIndicatorCount, relBuilder.peek().getRowType(), aggCall.e,
    leftSubTotal == null ? -1 : leftSubTotal,
 if (splitter != null) {
  final RelDataType rowType = relBuilder.peek().getRowType();
  projects2.add(splitter.singleton(rexBuilder, rowType, newAggCall));

    if (!aggCall.e.getArgList().isEmpty()
        && fieldSet.contains(ImmutableBitSet.of(aggCall.e.getArgList()))) {
      final RexNode singleton = splitter.singleton(rexBuilder,
          joinInput.getRowType(), aggCall.e.transform(mapping));
      final RexNode targetSingleton = rexBuilder.ensureType(aggCall.e.type, singleton, false);
    final AggregateCall call1;
    if (fieldSet.contains(ImmutableBitSet.of(aggCall.e.getArgList()))) {
      final AggregateCall splitCall = splitter.split(aggCall.e, mapping);
      call1 = splitCall.adaptTo(
          joinInput, splitCall.getArgList(), splitCall.filterArg,
          oldGroupKeyCount, newGroupKeyCount);
    } else {
      call1 = splitter.other(rexBuilder.getTypeFactory(), aggCall.e);
final Integer rightSubTotal = sides.get(1).split.get(aggCall.i);
newAggCalls.add(
    splitter.topSplit(rexBuilder, registry(projects),
        groupIndicatorCount, relBuilder.peek().getRowType(), aggCall.e,
        leftSubTotal == null ? -1 : leftSubTotal,
  if (splitter != null) {
    final RelDataType rowType = relBuilder.peek().getRowType();
    final RexNode singleton = splitter.singleton(rexBuilder, rowType, newAggCall);
    final RelDataType originalAggCallType =
        aggregate.getRowType().getFieldList().get(aggCallIdx).getType();