@Override
  public int spillPartitionId() {
    return adapterDirectAccess.directSpillPartitionId();
  }
Root interface for a vector map join hash table (which could be a hash map, hash multi-set, or
hash set).
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/mapjoin/optimized/VectorMapJoinOptimizedHashTable.java