org.apache.tajo.plan.logical

Class GroupbyNode

java.lang.Object

org.apache.tajo.plan.logical.LogicalNode

org.apache.tajo.plan.logical.UnaryNode

org.apache.tajo.plan.logical.GroupbyNode

All Implemented Interfaces:

Cloneable, GsonObject, Projectable

public class GroupbyNode
extends UnaryNode
implements Projectable, Cloneable

Constructor Summary

Constructors

Constructor and Description
GroupbyNode(int pid)

Method Summary

Methods

Modifier and Type	Method and Description
int	aggregationFunctionNum()
Object	clone()
boolean	equals(Object obj)
AggregationFunctionCallEval[]	getAggFunctions()
Column[]	getGroupingColumns()
PlanString	getPlanString()
String	getShortPlanString()
Target[]	getTargets() Get a list of targets
int	groupingKeyNum()
boolean	hasAggFunctions()
boolean	hasTargets() check if this node has a target list
boolean	isAggregationColumn(String simpleName) It checks if an alias name included in the target of this node is for aggregation function.
boolean	isDistinct()
boolean	isEmptyGrouping()
void	setAggFunctions(AggregationFunctionCallEval[] evals)
void	setChild(LogicalNode subNode)
void	setDistinct(boolean distinct)
void	setGroupingColumns(Column[] groupingKeys)
void	setTargets(Target[] targets) Set a target list
String	toString()

Methods inherited from class org.apache.tajo.plan.logical.UnaryNode

childNum, deepEquals, getChild, getChild, postOrder, preOrder

Methods inherited from class org.apache.tajo.plan.logical.LogicalNode

getCost, getInSchema, getOutSchema, getPID, getType, setCost, setInSchema, setOutSchema, setPID, setType, toJson

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.tajo.plan.logical.Projectable

getInSchema, getOutSchema, getPID

Constructor Detail

GroupbyNode

public GroupbyNode(int pid)

Method Detail

groupingKeyNum

public int groupingKeyNum()

isEmptyGrouping

public final boolean isEmptyGrouping()

setGroupingColumns

public void setGroupingColumns(Column[] groupingKeys)

getGroupingColumns

public final Column[] getGroupingColumns()

isDistinct

public final boolean isDistinct()

setDistinct

public void setDistinct(boolean distinct)

hasAggFunctions

public boolean hasAggFunctions()

aggregationFunctionNum

public int aggregationFunctionNum()

getAggFunctions

public AggregationFunctionCallEval[] getAggFunctions()

setAggFunctions

public void setAggFunctions(AggregationFunctionCallEval[] evals)

hasTargets

public boolean hasTargets()

Description copied from interface: Projectable

check if this node has a target list

Specified by:

hasTargets in interface Projectable

Returns:

TRUE if this node has a target list. Otherwise, FALSE.

setTargets

public void setTargets(Target[] targets)

Description copied from interface: Projectable

Set a target list

Specified by:

setTargets in interface Projectable

Parameters:

targets - The array of targets

getTargets

public Target[] getTargets()

Description copied from interface: Projectable

Get a list of targets

Specified by:

getTargets in interface Projectable

Returns:

The array of targets

setChild

public void setChild(LogicalNode subNode)

Overrides:

setChild in class UnaryNode

toString

public String toString()

Overrides:

toString in class LogicalNode

equals

public boolean equals(Object obj)

Overrides:

equals in class LogicalNode

clone

public Object clone()
             throws CloneNotSupportedException

Overrides:

clone in class UnaryNode

Throws:

CloneNotSupportedException

getShortPlanString

public String getShortPlanString()

getPlanString

public PlanString getPlanString()

Specified by:

getPlanString in class LogicalNode

isAggregationColumn

public boolean isAggregationColumn(String simpleName)

It checks if an alias name included in the target of this node is for aggregation function. If so, it returns TRUE. Otherwise, it returns FALSE.