Package org.teiid.query.processor.relational

Class ProjectNode

java.lang.Object

org.teiid.query.processor.relational.RelationalNode

org.teiid.query.processor.relational.SubqueryAwareRelationalNode

org.teiid.query.processor.relational.ProjectNode

All Implemented Interfaces:

Cloneable, BatchCollector.BatchProducer

public class ProjectNode
extends SubqueryAwareRelationalNode

Field Summary

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

childCount

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ProjectNode()
	ProjectNode(int nodeID)

Method Summary

Modifier and Type	Method	Description
void	addChild(RelationalNode child)
Object	clone()	All the implementation of Cloneable interface need to implement clone() method.
protected void	copyTo(ProjectNode target)
TupleBuffer	getBufferDirect(int maxRows)	For subclasses to override if they wish to return a buffer rather than batches.
PlanNode	getDescriptionProperties()
protected void	getNodeString(StringBuffer str)
Collection<? extends LanguageObject>	getObjects()
List<? extends Expression>	getSelectSymbols()	return List of select symbols
boolean	hasBuffer()	Return true if the node provides a final buffer via getBuffer
TupleBatch	nextBatchDirect()	Template method for subclasses to implement.
void	reset()
void	setSelectSymbols(List<? extends Expression> symbols)

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

closeDirect, getEvaluator, requiresTransaction, requiresTransaction, setReferenceValues

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ProjectNode

protected ProjectNode()

ProjectNode

public ProjectNode(int nodeID)

Method Detail

reset

public void reset()

Overrides:

reset in class SubqueryAwareRelationalNode

getSelectSymbols

public List<? extends Expression> getSelectSymbols()

return List of select symbols

Returns:

List of select symbols

setSelectSymbols

public void setSelectSymbols(List<? extends Expression> symbols)

addChild

public void addChild(RelationalNode child)

Overrides:

addChild in class RelationalNode

nextBatchDirect

public 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

getNodeString

protected void getNodeString(StringBuffer str)

Overrides:

getNodeString in class RelationalNode

clone

public 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

copyTo

protected void copyTo(ProjectNode target)

getDescriptionProperties

public PlanNode getDescriptionProperties()

Overrides:

getDescriptionProperties in class RelationalNode

getObjects

public Collection<? extends LanguageObject> getObjects()

Specified by:

getObjects in class SubqueryAwareRelationalNode

hasBuffer

public boolean hasBuffer()

Description copied from class: RelationalNode

Return true if the node provides a final buffer via getBuffer

Specified by:

hasBuffer in interface BatchCollector.BatchProducer

Overrides:

hasBuffer in class RelationalNode

getBufferDirect

public TupleBuffer getBufferDirect(int maxRows)
                            throws BlockedException,
                                   TeiidComponentException,
                                   TeiidProcessingException

Description copied from class: RelationalNode

For subclasses to override if they wish to return a buffer rather than batches.

Overrides:

getBufferDirect in class RelationalNode

Returns:

Throws:

BlockedException

TeiidComponentException

TeiidProcessingException