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

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

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

FilterStringColLikeStringScalar, FilterStringColRegExpStringScalar

public abstract class AbstractFilterStringColLikeStringScalar
extends VectorExpression

An abstract class for LIKE and REGEXP expressions. LIKE and REGEXP expression share similar functions, but they have different grammars. AbstractFilterStringColLikeStringScalar class provides shared classes and methods. Each subclass handles its grammar.

See Also:

Serialized Form

Nested Class Summary

static interface

AbstractFilterStringColLikeStringScalar.Checker A Checker contains a pattern and checks whether a given string matches or not.

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

VectorExpression.Type

Constructor Summary

AbstractFilterStringColLikeStringScalar()

AbstractFilterStringColLikeStringScalar(int colNum, String pattern)

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.
String	getPattern()
void	setColNum(int colNum)
void	setPattern(String pattern)

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

AbstractFilterStringColLikeStringScalar

public AbstractFilterStringColLikeStringScalar()

AbstractFilterStringColLikeStringScalar

public AbstractFilterStringColLikeStringScalar(int colNum,
                                               String pattern)

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

getColNum

public int getColNum()

setColNum

public void setColNum(int colNum)

getPattern

public String getPattern()

setPattern

public void setPattern(String pattern)

getDescriptor

public VectorExpressionDescriptor.Descriptor getDescriptor()

Specified by:

getDescriptor in class VectorExpression