org.apache.hadoop.hive.ql.exec.vector.expressions
Class FuncRand

java.lang.Object
  org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression
      org.apache.hadoop.hive.ql.exec.vector.expressions.FuncRand

All Implemented Interfaces:

Serializable

public class FuncRand
extends VectorExpression

Implements vectorized rand(seed) function evaluation.

See Also:

Serialized Form

Nested Class Summary

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

VectorExpression.Type

Constructor Summary

FuncRand()

FuncRand(long seed, int outputCol)

Method Summary

void	evaluate(VectorizedRowBatch batch) This is the primary method to implement expression logic.
VectorExpressionDescriptor.Descriptor	getDescriptor()
int	getOutputCol()
int	getOutputColumn() Returns the index of the output column in the array of column vectors.
String	getOutputType() Returns type of the output column.
Random	getRandom()
void	setOutputCol(int outputCol)
void	setRandom(Random random)

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

getChildExpressions, getInputTypes, setChildExpressions, setInputTypes, setOutputType, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

FuncRand

public FuncRand(long seed,
                int outputCol)

FuncRand

public FuncRand()

Method Detail

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

getOutputCol

public int getOutputCol()

setOutputCol

public void setOutputCol(int outputCol)

getRandom

public Random getRandom()

setRandom

public void setRandom(Random random)

getOutputType

public String getOutputType()

Description copied from class: VectorExpression

Returns type of the output column.

Overrides:

getOutputType in class VectorExpression

getDescriptor

public VectorExpressionDescriptor.Descriptor getDescriptor()

Specified by:

getDescriptor in class VectorExpression