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

Class FilterStringColumnInList

java.lang.Object

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

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

All Implemented Interfaces:

Serializable, IStringInExpr

public class FilterStringColumnInList
extends VectorExpression
implements IStringInExpr

Evaluate an IN filter on a batch for a vector of strings. This is optimized so that no objects have to be created in the inner loop, and there is a hash table implemented with Cuckoo hashing that has fast lookup to do the IN test.

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
FilterStringColumnInList()
FilterStringColumnInList(int colNum) After construction you must call setInListValues() to add the values to the IN set.

Method Summary

Methods

Modifier and Type	Method and Description
void	evaluate(VectorizedRowBatch batch) This is the primary method to implement expression logic.
VectorExpressionDescriptor.Descriptor	getDescriptor()
byte[][]	getInListValues()
int	getOutputColumn() Returns the index of the output column in the array of column vectors.
String	getOutputType() Returns type of the output column.
void	setInListValues(byte[][] a)

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

FilterStringColumnInList

public FilterStringColumnInList()

FilterStringColumnInList

public FilterStringColumnInList(int colNum)

After construction you must call setInListValues() to add the values to the IN set.

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

getOutputType

public String getOutputType()

Description copied from class: VectorExpression

Returns type of the output column.

Overrides:

getOutputType 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

getDescriptor

public VectorExpressionDescriptor.Descriptor getDescriptor()

Specified by:

getDescriptor in class VectorExpression

getInListValues

public byte[][] getInListValues()

setInListValues

public void setInListValues(byte[][] a)

Specified by:

setInListValues in interface IStringInExpr