public PartitionIterable withProjectSpec(GetPartitionsRequest request) {
    this.request = request;
    return this;
  }
Primary constructor that fetches all partitions in a given table, given
a Hive object and a table object, and a partial partition spec.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/PartitionIterable.java