org.apache.hadoop.hive.ql.exec.vector.mapjoin.optimized

Class VectorMapJoinOptimizedHashMap.HashMapResult

java.lang.Object

org.apache.hadoop.hive.ql.exec.vector.mapjoin.hashtable.VectorMapJoinHashTableResult

org.apache.hadoop.hive.ql.exec.vector.mapjoin.hashtable.VectorMapJoinHashMapResult

org.apache.hadoop.hive.ql.exec.vector.mapjoin.optimized.VectorMapJoinOptimizedHashMap.HashMapResult

Enclosing class:

VectorMapJoinOptimizedHashMap

public static class VectorMapJoinOptimizedHashMap.HashMapResult
extends VectorMapJoinHashMapResult

Constructor Summary

Constructors

Constructor and Description
HashMapResult()
HashMapResult(BytesBytesMultiHashMap.Result bytesBytesMultiHashMapResult)

Method Summary

Modifier and Type	Method and Description
BytesBytesMultiHashMap.Result	bytesBytesMultiHashMapResult()
int	cappedCount()
WriteBuffers.ByteSegmentRef	first()
void	forget() Forget about the most recent hash table lookup or contains call.
String	getDetailedHashMapResultPositionString() Get detailed HashMap result position information to help diagnose exceptions.
boolean	hasRows()
boolean	isCappedCountAvailable()
boolean	isSingleRow()
WriteBuffers.ByteSegmentRef	next()
String	toString()

Methods inherited from class org.apache.hadoop.hive.ql.exec.vector.mapjoin.hashtable.VectorMapJoinHashTableResult

getReadPos, joinResult, setJoinResult, setSpillPartitionId, spillPartitionId

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

HashMapResult

public HashMapResult()

HashMapResult

public HashMapResult(BytesBytesMultiHashMap.Result bytesBytesMultiHashMapResult)

Method Detail

bytesBytesMultiHashMapResult

public BytesBytesMultiHashMap.Result bytesBytesMultiHashMapResult()

hasRows

public boolean hasRows()

Specified by:

hasRows in class VectorMapJoinHashMapResult

Returns:

Whether there are any rows (i.e. true for match).

isSingleRow

public boolean isSingleRow()

Specified by:

isSingleRow in class VectorMapJoinHashMapResult

Returns:

Whether there is 1 value row.

isCappedCountAvailable

public boolean isCappedCountAvailable()

Specified by:

isCappedCountAvailable in class VectorMapJoinHashMapResult

Returns:

Whether there is a capped count available from cappedCount.

cappedCount

public int cappedCount()

Specified by:

cappedCount in class VectorMapJoinHashMapResult

Returns:

The count of values, up to a arbitrary cap limit. When available, the capped count can be used to make decisions on how to optimally generate join results.

first

public WriteBuffers.ByteSegmentRef first()

Specified by:

first in class VectorMapJoinHashMapResult

Returns:

A reference to the first value, or null if there are no values.

next

public WriteBuffers.ByteSegmentRef next()

Specified by:

next in class VectorMapJoinHashMapResult

Returns:

The next value, or null if there are no more values to be read.

forget

public void forget()

Description copied from class: VectorMapJoinHashTableResult

Forget about the most recent hash table lookup or contains call.

Overrides:

forget in class VectorMapJoinHashTableResult

toString

public String toString()

Overrides:

toString in class VectorMapJoinHashTableResult

getDetailedHashMapResultPositionString

public String getDetailedHashMapResultPositionString()

Description copied from class: VectorMapJoinHashMapResult

Get detailed HashMap result position information to help diagnose exceptions.

Specified by:

getDetailedHashMapResultPositionString in class VectorMapJoinHashMapResult