How to use

setAggChildKeys

method

in

org.apache.calcite.rel.metadata.RelMdUtil

public Double getPopulationSize(Aggregate rel, RelMetadataQuery mq,
  ImmutableBitSet groupKey) {
 ImmutableBitSet.Builder childKey = ImmutableBitSet.builder();
 RelMdUtil.setAggChildKeys(groupKey, rel, childKey);
 return mq.getPopulationSize(rel.getInput(), childKey.build());
}

public Double getPopulationSize(Aggregate rel, RelMetadataQuery mq,
  ImmutableBitSet groupKey) {
 ImmutableBitSet.Builder childKey = ImmutableBitSet.builder();
 RelMdUtil.setAggChildKeys(groupKey, rel, childKey);
 return mq.getPopulationSize(rel.getInput(), childKey.build());
}

RelMdUtil.setAggChildKeys(groupKey, rel, childKey);

RelMdUtil.setAggChildKeys(groupKey, rel, childKey);