Package org.apache.datasketches.hive.cpc
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.cpc.UnionSketchUDAF.UnionSketchUDAFEvaluator
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- All Implemented Interfaces:
Closeable,AutoCloseable
- Enclosing class:
- UnionSketchUDAF
public static class UnionSketchUDAF.UnionSketchUDAFEvaluator extends org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluatorEvaluator class, 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
Fields Modifier and Type Field Description protected org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspectorinputInspector_protected org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspectorintermediateInspector_protected static StringLG_K_FIELDprotected org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspectorlgKInspector_protected static StringSEED_FIELDprotected org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspectorseedInspector_protected static StringSKETCH_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.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffergetNewAggregationBuffer()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 buf, Object[] parameters)Add the incoming sketch into the internal state.voidmerge(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffer buf, Object data)voidreset(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffer buf)Objectterminate(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffer buf)ObjectterminatePartial(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffer buf)
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Field Detail
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LG_K_FIELD
protected static final String LG_K_FIELD
- See Also:
- Constant Field Values
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SEED_FIELD
protected static final String SEED_FIELD
- See Also:
- Constant Field Values
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SKETCH_FIELD
protected static final String SKETCH_FIELD
- See Also:
- Constant Field Values
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inputInspector_
protected org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector inputInspector_
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lgKInspector_
protected org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector lgKInspector_
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seedInspector_
protected org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector seedInspector_
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intermediateInspector_
protected org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector intermediateInspector_
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Method Detail
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getNewAggregationBuffer
public org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffer getNewAggregationBuffer() throws org.apache.hadoop.hive.ql.metadata.HiveException- Specified by:
getNewAggregationBufferin classorg.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator- Throws:
org.apache.hadoop.hive.ql.metadata.HiveException
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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 and 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 buf, 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:
buf- 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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terminatePartial
public Object terminatePartial(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffer buf) throws org.apache.hadoop.hive.ql.metadata.HiveException
- Specified by:
terminatePartialin classorg.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator- Throws:
org.apache.hadoop.hive.ql.metadata.HiveException
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merge
public void merge(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffer buf, Object data) throws org.apache.hadoop.hive.ql.metadata.HiveException- Specified by:
mergein classorg.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator- Throws:
org.apache.hadoop.hive.ql.metadata.HiveException
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terminate
public Object terminate(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffer buf) throws org.apache.hadoop.hive.ql.metadata.HiveException
- Specified by:
terminatein classorg.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator- Throws:
org.apache.hadoop.hive.ql.metadata.HiveException
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reset
public void reset(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.AggregationBuffer buf) throws org.apache.hadoop.hive.ql.metadata.HiveException- Specified by:
resetin classorg.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator- Throws:
org.apache.hadoop.hive.ql.metadata.HiveException
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