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

Class VectorMapJoinFastValueStore.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.fast.VectorMapJoinFastValueStore.HashMapResult

Enclosing class:

VectorMapJoinFastValueStore

public static class VectorMapJoinFastValueStore.HashMapResult
extends VectorMapJoinHashMapResult

Constructor Summary

Constructors

Constructor and Description
HashMapResult()

Method Summary

Modifier and Type	Method and Description
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()
WriteBuffers.ByteSegmentRef	internalRead()
boolean	isCappedCountAvailable()
boolean	isSingleRow()
WriteBuffers.ByteSegmentRef	next()
void	set(VectorMapJoinFastValueStore valueStore, long valueRefWord)
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()

Method Detail

set

public void set(VectorMapJoinFastValueStore valueStore,
                long valueRefWord)

getDetailedHashMapResultPositionString

public String getDetailedHashMapResultPositionString()

Get detailed HashMap result position information to help diagnose exceptions.

Specified by:

getDetailedHashMapResultPositionString in class VectorMapJoinHashMapResult

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.

internalRead

public WriteBuffers.ByteSegmentRef internalRead()

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