brickhouse.udf.hll
Class HyperLogLogUDAF

java.lang.Object
  org.apache.hadoop.hive.ql.udf.generic.AbstractGenericUDAFResolver
      brickhouse.udf.hll.HyperLogLogUDAF

All Implemented Interfaces:

org.apache.hadoop.hive.ql.udf.generic.GenericUDAFResolver, org.apache.hadoop.hive.ql.udf.generic.GenericUDAFResolver2

public class HyperLogLogUDAF
extends org.apache.hadoop.hive.ql.udf.generic.AbstractGenericUDAFResolver

Aggregate and return a HyperLogLog. Uses Clearspring's Stream-lib project

Nested Class Summary

static class

HyperLogLogUDAF.HyperLogLogUDAFEvaluator

Constructor Summary

HyperLogLogUDAF()

Method Summary

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

getEvaluator(org.apache.hadoop.hive.serde2.typeinfo.TypeInfo[] parameters)

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

getEvaluator

Methods inherited from class java.lang.Object

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

Constructor Detail

HyperLogLogUDAF

public HyperLogLogUDAF()

Method Detail

getEvaluator

public org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator getEvaluator(org.apache.hadoop.hive.serde2.typeinfo.TypeInfo[] parameters)
                                                                        throws org.apache.hadoop.hive.ql.parse.SemanticException

Specified by:

getEvaluator in interface org.apache.hadoop.hive.ql.udf.generic.GenericUDAFResolver

Overrides:

getEvaluator in class org.apache.hadoop.hive.ql.udf.generic.AbstractGenericUDAFResolver

Throws:

org.apache.hadoop.hive.ql.parse.SemanticException