public void addToPartitionColumns(ColumnInfo elem) {
    if (this.partitionColumns == null) {
      this.partitionColumns = new java.util.ArrayList<ColumnInfo>();
    }
    this.partitionColumns.add(elem);
  }
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