org.teiid.query.processor.relational
Class LimitNode

java.lang.Object
  org.teiid.query.processor.relational.RelationalNode
      org.teiid.query.processor.relational.LimitNode

All Implemented Interfaces:

java.lang.Cloneable, BatchCollector.BatchProducer

public class LimitNode
extends RelationalNode

Constructor Summary

LimitNode(int nodeID, Expression limitExpr, Expression offsetExpr)

Method Summary

java.lang.Object	clone() All the implementation of Cloneable interface need to implement clone() method.
PlanNode	getDescriptionProperties()
Expression	getLimitExpr()
protected void	getNodeString(java.lang.StringBuffer buf)
Expression	getOffsetExpr()
protected TupleBatch	nextBatchDirect() Template method for subclasses to implement.
void	open()
void	reset()

Methods inherited from class org.teiid.query.processor.relational.RelationalNode

addBatchRow, addChild, close, closeDirect, copy, createLookupMap, getBatchSize, getBufferManager, getChildren, getClassName, getConnectionID, getContext, getDataManager, getElements, getEstimateNodeCardinality, getID, getNodeStatistics, getOutputElements, getParent, getProjectionIndexes, hasPendingRows, initialize, isBatchFull, isClosed, isLastBatch, nextBatch, nodeToString, projectTuple, pullBatch, setContext, setElements, setEstimateDepAccessCardinality, setEstimateDepJoinCost, setEstimateJoinCost, setEstimateNodeCardinality, setEstimateNodeSetSize, setID, setParent, terminateBatches, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

LimitNode

public LimitNode(int nodeID,
                 Expression limitExpr,
                 Expression offsetExpr)

Method Detail

nextBatchDirect

protected TupleBatch nextBatchDirect()
                              throws BlockedException,
                                     TeiidComponentException,
                                     TeiidProcessingException

Description copied from class: RelationalNode

Template method for subclasses to implement.

Specified by:

nextBatchDirect in class RelationalNode

Returns:

Throws:

BlockedException

TeiidComponentException

TeiidProcessingException - if exception related to user input occured

open

public void open()
          throws TeiidComponentException,
                 TeiidProcessingException

Overrides:

open in class RelationalNode

Throws:

TeiidComponentException

TeiidProcessingException

reset

public void reset()

Overrides:

reset in class RelationalNode

getNodeString

protected void getNodeString(java.lang.StringBuffer buf)

Overrides:

getNodeString in class RelationalNode

getDescriptionProperties

public PlanNode getDescriptionProperties()

Overrides:

getDescriptionProperties in class RelationalNode

clone

public java.lang.Object clone()

Description copied from class: RelationalNode

All the implementation of Cloneable interface need to implement clone() method. The plan is only clonable in the pre-execution stage, not the execution state (things like program state, result sets, etc). It's only safe to call that method in between query processings, in other words, it's only safe to call clone() on a plan after nextTuple() returns null, meaning the plan has finished processing.

Specified by:

clone in class RelationalNode

getLimitExpr

public Expression getLimitExpr()

getOffsetExpr

public Expression getOffsetExpr()