@org.apache.amoro.shade.thrift.org.apache.thrift.annotation.Nullable
  public java.util.Iterator<ColumnInfo> getPartitionColumnsIterator() {
    return (this.partitionColumns == null) ? null : this.partitionColumns.iterator();
  }
Returns true if field pks is set (has been assigned a value) and false otherwise
amoro-common/src/main/gen-java/org/apache/amoro/api/Schema.java