org.apache.hadoop.hive.ql.udf.generic

Class GenericUDAFVarianceSample.GenericUDAFVarianceSampleEvaluator

java.lang.Object

org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator

org.apache.hadoop.hive.ql.udf.generic.GenericUDAFVariance.GenericUDAFVarianceEvaluator

org.apache.hadoop.hive.ql.udf.generic.GenericUDAFVarianceSample.GenericUDAFVarianceSampleEvaluator

All Implemented Interfaces:

Closeable, AutoCloseable

Enclosing class:

GenericUDAFVarianceSample

public static class GenericUDAFVarianceSample.GenericUDAFVarianceSampleEvaluator
extends GenericUDAFVariance.GenericUDAFVarianceEvaluator

Compute the sample variance by extending GenericUDAFVarianceEvaluator and overriding the terminate() method of the evaluator.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator

GenericUDAFEvaluator.AbstractAggregationBuffer, GenericUDAFEvaluator.AggregationBuffer, GenericUDAFEvaluator.AggregationType, GenericUDAFEvaluator.Mode

Field Summary

Fields inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator

partitionEvaluator

Constructor Summary

Constructors

Constructor and Description
GenericUDAFVarianceSampleEvaluator()

Method Summary

Modifier and Type	Method and Description
static double	calculateVarianceSampleResult(double variance, long count)
Object	terminate(GenericUDAFEvaluator.AggregationBuffer agg) Get final aggregation result.

Methods inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFVariance.GenericUDAFVarianceEvaluator

calculateVarianceResult, getNewAggregationBuffer, getResult, init, iterate, merge, reset, setResult, terminatePartial

Methods inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator

aggregate, close, configure, createPartitionEvaluator, estimate, evaluate, getExprString, getPartitionWindowingEvaluator, getWindowingEvaluator, isEstimable

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericUDAFVarianceSampleEvaluator

public GenericUDAFVarianceSampleEvaluator()

Method Detail

calculateVarianceSampleResult

public static double calculateVarianceSampleResult(double variance,
                                                   long count)

terminate

public Object terminate(GenericUDAFEvaluator.AggregationBuffer agg)
                 throws HiveException

Description copied from class: GenericUDAFEvaluator

Get final aggregation result.

Overrides:

terminate in class GenericUDAFVariance.GenericUDAFVarianceEvaluator

Returns:

final aggregation result.

Throws:

HiveException