@Override
    public boolean equals(Object o) {
      if (this == o)
        return true;
      if (o == null || getClass() != o.getClass())
        return false;
      PartitionFieldNode that = (PartitionFieldNode) o;
      return Objects.equals(fieldName, that.fieldName);
    }
Given a list of partition ids, returns the List of partially filled partitions based on the
projection list used to instantiate this PartitionProjectionEvaluator
@param partitionIds List of partition ids corresponding to the Partitions objects which are requested
@return Partitions where each partition has only the projected fields set
@throws MetaException
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/PartitionProjectionEvaluator.java