@Override
    public boolean equals(Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }
      Aggregation that = (Aggregation) o;
      return distinct == that.distinct
          && Objects.equals(resolvedFunction, that.resolvedFunction)
          && Objects.equals(arguments, that.arguments)
          && Objects.equals(filter, that.filter)
          && Objects.equals(orderingScheme, that.orderingScheme)
          && Objects.equals(mask, that.mask);
    }
@return whether this node should produce default output in case of no input pages. For example
    for query:
    <p>SELECT count(*) FROM nation WHERE nationkey < 0
    <p>A default output of "0" is expected to be produced by FINAL aggregation operator.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/planner/node/AggregationNode.java