org.apache.hadoop.hive.ql.exec.vector.udf

Class VectorUDFAdaptor

java.lang.Object

org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression

org.apache.hadoop.hive.ql.exec.vector.udf.VectorUDFAdaptor

All Implemented Interfaces:

Serializable

public class VectorUDFAdaptor
extends VectorExpression

A VectorUDFAdaptor is a vectorized expression for invoking a custom UDF on zero or more input vectors or constants which are the function arguments.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression

VectorExpression.Type

Field Summary

Fields inherited from class org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression

childExpressions, inputTypes, outputType

Constructor Summary

Constructors

Constructor and Description
VectorUDFAdaptor()
VectorUDFAdaptor(ExprNodeGenericFuncDesc expr, int outputColumn, String resultType, VectorUDFArgDesc[] argDescs)

Method Summary

Methods

Modifier and Type	Method and Description
void	evaluate(VectorizedRowBatch batch) This is the primary method to implement expression logic.
VectorUDFArgDesc[]	getArgDescs()
VectorExpressionDescriptor.Descriptor	getDescriptor()
ExprNodeGenericFuncDesc	getExpr()
int	getOutputColumn() Returns the index of the output column in the array of column vectors.
String	getOutputType() Returns type of the output column.
String	getResultType()
void	init()
void	setArgDescs(VectorUDFArgDesc[] argDescs)
void	setExpr(ExprNodeGenericFuncDesc expr)
void	setOutputColumn(int outputColumn)
void	setResultType(String resultType)

Methods inherited from class org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression

evaluateChildren, getChildExpressions, getInputTypes, setChildExpressions, setInputTypes, setOutputType, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorUDFAdaptor

public VectorUDFAdaptor()

VectorUDFAdaptor

public VectorUDFAdaptor(ExprNodeGenericFuncDesc expr,
                int outputColumn,
                String resultType,
                VectorUDFArgDesc[] argDescs)
                 throws HiveException

Throws:

HiveException

Method Detail

init

public void init()
          throws HiveException,
                 UDFArgumentException

Throws:

HiveException

UDFArgumentException

evaluate

public void evaluate(VectorizedRowBatch batch)

Description copied from class: VectorExpression

This is the primary method to implement expression logic.

Specified by:

evaluate in class VectorExpression

getOutputColumn

public int getOutputColumn()

Description copied from class: VectorExpression

Returns the index of the output column in the array of column vectors. If not applicable, -1 is returned.

Specified by:

getOutputColumn in class VectorExpression

Returns:

Index of the output column

setOutputColumn

public void setOutputColumn(int outputColumn)

getOutputType

public String getOutputType()

Description copied from class: VectorExpression

Returns type of the output column.

Overrides:

getOutputType in class VectorExpression

getResultType

public String getResultType()

setResultType

public void setResultType(String resultType)

getArgDescs

public VectorUDFArgDesc[] getArgDescs()

setArgDescs

public void setArgDescs(VectorUDFArgDesc[] argDescs)

getExpr

public ExprNodeGenericFuncDesc getExpr()

setExpr

public void setExpr(ExprNodeGenericFuncDesc expr)

getDescriptor

public VectorExpressionDescriptor.Descriptor getDescriptor()

Specified by:

getDescriptor in class VectorExpression