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

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

All Implemented Interfaces:

Serializable

public class StringSubstrColStart
extends VectorExpression

This class provides the implementation of vectorized substring, with a single start index parameter. If the start index is invalid (outside of the string boundaries) then an empty string will be in the output.

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

StringSubstrColStart()

StringSubstrColStart(int colNum, int startIdx, int outputColumn)

Method Summary

void	evaluate(VectorizedRowBatch batch) This is the primary method to implement expression logic.
int	getColNum()
VectorExpressionDescriptor.Descriptor	getDescriptor()
int	getOutputColumn() Returns the index of the output column in the array of column vectors.
String	getOutputType() Returns type of the output column.
int	getStartIdx()
void	setColNum(int colNum)
void	setOutputColumn(int outputColumn)
void	setStartIdx(int startIdx)

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

StringSubstrColStart

public StringSubstrColStart(int colNum,
                            int startIdx,
                            int outputColumn)

StringSubstrColStart

public StringSubstrColStart()

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

getOutputType

public String getOutputType()

Description copied from class: VectorExpression

Returns type of the output column.

Overrides:

getOutputType in class VectorExpression

getStartIdx

public int getStartIdx()

setStartIdx

public void setStartIdx(int startIdx)

getColNum

public int getColNum()

setColNum

public void setColNum(int colNum)

setOutputColumn

public void setOutputColumn(int outputColumn)

getDescriptor

public VectorExpressionDescriptor.Descriptor getDescriptor()

Specified by:

getDescriptor in class VectorExpression