org.teiid.query.function.aggregate

Class NthValue

java.lang.Object

org.teiid.query.function.aggregate.AggregateFunction

org.teiid.query.function.aggregate.NthValue

public class NthValue
extends AggregateFunction

Field Summary

Fields inherited from class org.teiid.query.function.aggregate.AggregateFunction

argIndexes

Constructor Summary

Constructors

Constructor and Description
NthValue()

Method Summary

Modifier and Type	Method and Description
void	addInput(List<?> tuple, CommandContext commandContext, long startFrame, long endFrame, TupleBuffer frame)
void	addInputDirect(List<?> tuple, CommandContext commandContext) Called for the element value in every row of a group.
Object	getResult(CommandContext commandContext) Called after all values have been processed to get the result.
void	reset() Called to reset the state of the function.
boolean	respectsNull()

Methods inherited from class org.teiid.query.function.aggregate.AggregateFunction

addInput, filter, getArgIndexes, getOutputType, getState, getStateTypes, initialize, setArgIndexes, setConditionIndex, setState

Methods inherited from class java.lang.Object

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

Constructor Detail

NthValue

public NthValue()

Method Detail

addInputDirect

public void addInputDirect(List<?> tuple,
                           CommandContext commandContext)
                    throws TeiidComponentException,
                           TeiidProcessingException

Description copied from class: AggregateFunction

Called for the element value in every row of a group.

Specified by:

addInputDirect in class AggregateFunction

Throws:

TeiidProcessingException

TeiidComponentException

addInput

public void addInput(List<?> tuple,
                     CommandContext commandContext,
                     long startFrame,
                     long endFrame,
                     TupleBuffer frame)
              throws TeiidComponentException,
                     TeiidProcessingException

Throws:

TeiidComponentException

TeiidProcessingException

respectsNull

public boolean respectsNull()

Overrides:

respectsNull in class AggregateFunction

reset

public void reset()

Description copied from class: AggregateFunction

Called to reset the state of the function.

Specified by:

reset in class AggregateFunction

getResult

public Object getResult(CommandContext commandContext)
                 throws FunctionExecutionException,
                        ExpressionEvaluationException,
                        TeiidComponentException,
                        TeiidProcessingException

Description copied from class: AggregateFunction

Called after all values have been processed to get the result.

Specified by:

getResult in class AggregateFunction

Returns:

Result value

Throws:

TeiidProcessingException

FunctionExecutionException

ExpressionEvaluationException

TeiidComponentException