org.apache.hadoop.hive.ql.exec.vector.ptf

Class VectorPTFEvaluatorAbstractSum<T>

java.lang.Object

org.apache.hadoop.hive.ql.exec.vector.ptf.VectorPTFEvaluatorBase

org.apache.hadoop.hive.ql.exec.vector.ptf.VectorPTFEvaluatorAbstractSum<T>

Direct Known Subclasses:

VectorPTFEvaluatorDecimalSum, VectorPTFEvaluatorDoubleSum, VectorPTFEvaluatorLongSum

public abstract class VectorPTFEvaluatorAbstractSum<T>
extends VectorPTFEvaluatorBase

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	isGroupResultNull
protected Range	previousRange
protected T	previousSum
protected T	sum

Fields inherited from class org.apache.hadoop.hive.ql.exec.vector.ptf.VectorPTFEvaluatorBase

inputColumnNum, LOG, outputColumnNum

Constructor Summary

Constructors

Constructor and Description
VectorPTFEvaluatorAbstractSum(WindowFrameDef windowFrameDef, VectorExpression inputVecExpr, int outputColumnNum)

Method Summary

Modifier and Type	Method and Description
boolean	canRunOptimizedCalculation(int rowNum, Range range) Whether the evaluator can calculate the result for a given range.
protected abstract T	computeValue(T number)
T	getGroupResult()
boolean	isGroupResultNull()
protected abstract T	minus(T number1, T number2)
void	onPartitionEnd() There might be some cleanup operations for evaluators that should not be taken care of after every row (resetEvaluator), but rather on partition-level.
void	onResultCalculated(Object result, Range range) This method is called by VectorPTFGroupBatches once the calculation is finished for a given row/range, but before the next calculation is invoked.
protected abstract T	plus(T number1, T number2)
Object	runOnRange(int rowNum, Range range, VectorPTFGroupBatches batches) This optimization is the vectorized counterpart of HIVE-15520.
boolean	streamsResult()

Methods inherited from class org.apache.hadoop.hive.ql.exec.vector.ptf.VectorPTFEvaluatorBase

doLastBatchWork, evaluateGroupBatch, evaluateInputExpr, getNullsLast, getOutputColumnNum, getResultColumnVectorType, isCacheableForRange, mapCustomColumns, resetEvaluator, setNullsLast

Methods inherited from class java.lang.Object

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

Field Detail

isGroupResultNull

protected boolean isGroupResultNull

sum

protected T sum

previousSum

protected T previousSum

previousRange

protected Range previousRange

Constructor Detail

VectorPTFEvaluatorAbstractSum

public VectorPTFEvaluatorAbstractSum(WindowFrameDef windowFrameDef,
                                     VectorExpression inputVecExpr,
                                     int outputColumnNum)

Method Detail

canRunOptimizedCalculation

public boolean canRunOptimizedCalculation(int rowNum,
                                          Range range)

Description copied from class: VectorPTFEvaluatorBase

Whether the evaluator can calculate the result for a given range. The optimization is supposed to save CPU/IO cost in case of evaluators that can provide the result without iterating through the batches of a range. This method is called before every single calculation, so it lets the evaluator store state whether it's able to run an optimized calculation in a given point of time.

Overrides:

canRunOptimizedCalculation in class VectorPTFEvaluatorBase

runOnRange

public Object runOnRange(int rowNum,
                         Range range,
                         VectorPTFGroupBatches batches)
                  throws HiveException

This optimization is the vectorized counterpart of HIVE-15520.

Overrides:

runOnRange in class VectorPTFEvaluatorBase

Throws:

HiveException

isGroupResultNull

public boolean isGroupResultNull()

Overrides:

isGroupResultNull in class VectorPTFEvaluatorBase

getGroupResult

public T getGroupResult()

Overrides:

getGroupResult in class VectorPTFEvaluatorBase

onResultCalculated

public void onResultCalculated(Object result,
                               Range range)

Description copied from class: VectorPTFEvaluatorBase

This method is called by VectorPTFGroupBatches once the calculation is finished for a given row/range, but before the next calculation is invoked.

Overrides:

onResultCalculated in class VectorPTFEvaluatorBase

onPartitionEnd

public void onPartitionEnd()

Description copied from class: VectorPTFEvaluatorBase

There might be some cleanup operations for evaluators that should not be taken care of after every row (resetEvaluator), but rather on partition-level.

Overrides:

onPartitionEnd in class VectorPTFEvaluatorBase

streamsResult

public boolean streamsResult()

Specified by:

streamsResult in class VectorPTFEvaluatorBase

plus

protected abstract T plus(T number1,
                          T number2)

minus

protected abstract T minus(T number1,
                           T number2)

computeValue

protected abstract T computeValue(T number)