Class UnionSketchUDAF.UnionSketchUDAFEvaluator
- java.lang.Object
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- org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator
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- org.apache.datasketches.hive.theta.UnionEvaluator
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- org.apache.datasketches.hive.theta.UnionSketchUDAF.UnionSketchUDAFEvaluator
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- All Implemented Interfaces:
Closeable,AutoCloseable
- Enclosing class:
- UnionSketchUDAF
public static class UnionSketchUDAF.UnionSketchUDAFEvaluator extends UnionEvaluator
Evaluator class of Generic UDAF, main logic of our UDAF.
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator
org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AbstractAggregationBuffer, org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffer, org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationType, org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.Mode
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Field Summary
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Fields inherited from class org.apache.datasketches.hive.theta.UnionEvaluator
inputObjectInspector, intermediateObjectInspector, NOMINAL_ENTRIES_FIELD, nominalEntriesObjectInspector, SEED_FIELD, seedObjectInspector, SKETCH_FIELD
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Constructor Summary
Constructors Constructor Description UnionSketchUDAFEvaluator()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorinit(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.Mode mode, org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector[] parameters)Receives the passed in argument object inspectors and returns the desired return type's object inspector to inform hive of return type of UDAF.voiditerate(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffer agg, Object[] parameters)Add the incoming sketch into the internal state.-
Methods inherited from class org.apache.datasketches.hive.theta.UnionEvaluator
getNewAggregationBuffer, merge, reset, terminate, terminatePartial
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Method Detail
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init
public org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector init(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.Mode mode, org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector[] parameters) throws org.apache.hadoop.hive.ql.metadata.HiveExceptionReceives the passed in argument object inspectors and returns the desired return type's object inspector to inform hive of return type of UDAF.- Overrides:
initin classorg.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator- Parameters:
mode- Mode (i.e. PARTIAL 1, COMPLETE...) for determining input/output object inspector type.parameters- List of object inspectors for input arguments.- Returns:
- The object inspector type indicates the UDAF return type (i.e. returned type of terminate(...)).
- Throws:
org.apache.hadoop.hive.ql.metadata.HiveException
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iterate
public void iterate(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffer agg, Object[] parameters) throws org.apache.hadoop.hive.ql.metadata.HiveExceptionAdd the incoming sketch into the internal state.- Specified by:
iteratein classorg.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator- Parameters:
agg- aggregation buffer storing intermediate results.parameters- sketches in the form of Object passed in to be merged.- Throws:
org.apache.hadoop.hive.ql.metadata.HiveException
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