public boolean isHashMapSpilledOnCreation(int partitionId) {
    return hashPartitions[partitionId].hashMapSpilledOnCreation;
  }
Check if the hash table of a specified partition has been "spilled" to disk when it was created.
In fact, in other words, check if a hashmap does exist or not.
@param partitionId hashMap ID
@return true if it was not created at all, false if there is a hash table existing there
ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/HybridHashTableContainer.java