org.apache.hadoop.hive.ql.udf.generic
Class GenericUDAFComputeStats.GenericUDAFDoubleStatsEvaluator.DoubleStatsAgg

java.lang.Object
  org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AbstractAggregationBuffer
      org.apache.hadoop.hive.ql.udf.generic.GenericUDAFComputeStats.GenericUDAFDoubleStatsEvaluator.DoubleStatsAgg

All Implemented Interfaces:

GenericUDAFEvaluator.AggregationBuffer

Enclosing class:

GenericUDAFComputeStats.GenericUDAFDoubleStatsEvaluator

public static class GenericUDAFComputeStats.GenericUDAFDoubleStatsEvaluator.DoubleStatsAgg
extends GenericUDAFEvaluator.AbstractAggregationBuffer

Field Summary

String	columnType
long	countNulls
boolean	firstItem
double	max
double	min
int	numBitVectors
DoubleNumDistinctValueEstimator	numDV

Constructor Summary

GenericUDAFComputeStats.GenericUDAFDoubleStatsEvaluator.DoubleStatsAgg()

Method Summary

int	estimate() Estimate the size of memory which is occupied by aggregation buffer.

Methods inherited from class java.lang.Object

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

Field Detail

columnType

public String columnType

min

public double min

max

public double max

countNulls

public long countNulls

numDV

public DoubleNumDistinctValueEstimator numDV

firstItem

public boolean firstItem

numBitVectors

public int numBitVectors

Constructor Detail

GenericUDAFComputeStats.GenericUDAFDoubleStatsEvaluator.DoubleStatsAgg

public GenericUDAFComputeStats.GenericUDAFDoubleStatsEvaluator.DoubleStatsAgg()

Method Detail

estimate

public int estimate()

Description copied from class: GenericUDAFEvaluator.AbstractAggregationBuffer

Estimate the size of memory which is occupied by aggregation buffer. Currently, hive assumes that primitives types occupies 16 byte and java object has 64 byte overhead for each. For map, each entry also has 64 byte overhead.

Overrides:

estimate in class GenericUDAFEvaluator.AbstractAggregationBuffer