@Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }
    AggregationDescriptor that = (AggregationDescriptor) o;
    return aggregationType == that.aggregationType
        && step == that.step
        && Objects.equals(inputExpressions, that.inputExpressions);
  }
Generates the parameter part of the function column name.

<p>Example:

<p>Full column name -> udf(root.sg.d.s1, sin(root.sg.d.s1))

<p>The parameter part -> root.sg.d.s1, sin(root.sg.d.s1)
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/parameter/AggregationDescriptor.java