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

Class VectorMapJoinHashMapResult

java.lang.Object

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

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

Direct Known Subclasses:

VectorMapJoinFastValueStore.HashMapResult, VectorMapJoinOptimizedHashMap.HashMapResult

public abstract class VectorMapJoinHashMapResult
extends VectorMapJoinHashTableResult

Constructor Summary

Constructors

Constructor and Description
VectorMapJoinHashMapResult()

Method Summary

Methods

Modifier and Type	Method and Description
abstract int	cappedCount()
abstract WriteBuffers.ByteSegmentRef	first()
abstract boolean	hasRows()
abstract boolean	isCappedCountAvailable()
abstract boolean	isEof()
abstract boolean	isSingleRow()
abstract WriteBuffers.ByteSegmentRef	next()

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

forget, joinResult, setJoinResult, setSpillPartitionId, spillPartitionId, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorMapJoinHashMapResult

public VectorMapJoinHashMapResult()

Method Detail

hasRows

public abstract boolean hasRows()

Returns:

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

isSingleRow

public abstract boolean isSingleRow()

Returns:

Whether there is 1 value row.

isCappedCountAvailable

public abstract boolean isCappedCountAvailable()

Returns:

Whether there is a capped count available from cappedCount.

cappedCount

public abstract int cappedCount()

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 abstract WriteBuffers.ByteSegmentRef first()

Returns:

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

next

public abstract WriteBuffers.ByteSegmentRef next()

Returns:

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

isEof

public abstract boolean isEof()

Returns:

Whether reading is at the end.