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

Class CastStringToDecimal

java.lang.Object

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

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

All Implemented Interfaces:

Serializable

public class CastStringToDecimal
extends VectorExpression

Cast a string to a decimal. If other functions besides cast need to take a string in and produce a decimal, you can subclass this class or convert it to a superclass, and implement different "func()" methods for each operation.

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
CastStringToDecimal()
CastStringToDecimal(int inputColumn, int outputColumn)

Method Summary

Methods

Modifier and Type	Method and Description
void	evaluate(VectorizedRowBatch batch) This is the primary method to implement expression logic.
protected void	func(DecimalColumnVector outV, BytesColumnVector inV, int i) Convert input string to a decimal, at position i in the respective vectors.
VectorExpressionDescriptor.Descriptor	getDescriptor()
int	getInputColumn()
int	getOutputColumn() Returns the index of the output column in the array of column vectors.
void	setInputColumn(int inputColumn)
void	setOutputColumn(int outputColumn)

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

CastStringToDecimal

public CastStringToDecimal(int inputColumn,
                   int outputColumn)

CastStringToDecimal

public CastStringToDecimal()

Method Detail

func

protected void func(DecimalColumnVector outV,
        BytesColumnVector inV,
        int i)

Convert input string to a decimal, at position i in the respective vectors.

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)

getInputColumn

public int getInputColumn()

setInputColumn

public void setInputColumn(int inputColumn)

getDescriptor

public VectorExpressionDescriptor.Descriptor getDescriptor()

Specified by:

getDescriptor in class VectorExpression