org.apache.pig.newplan.logical.relational
Class LOCogroup

java.lang.Object
  org.apache.pig.newplan.Operator
      org.apache.pig.newplan.logical.relational.LogicalRelationalOperator
          org.apache.pig.newplan.logical.relational.LOCogroup

public class LOCogroup
extends LogicalRelationalOperator

Nested Class Summary

static class

LOCogroup.GROUPTYPE Enum for the type of group

Field Summary

static Integer

OPTION_GROUPTYPE static constant to refer to the option of selecting a group type

Fields inherited from class org.apache.pig.newplan.logical.relational.LogicalRelationalOperator

alias, lineNum, mCustomPartitioner, mPinnedOptions, requestedParallelism, schema

Fields inherited from class org.apache.pig.newplan.Operator

annotations, hashPrime, location, name, plan

Constructor Summary

LOCogroup(LogicalPlan plan)
Constructor for use in defining rule patterns

LOCogroup(OperatorPlan plan, MultiMap<Integer,LogicalExpressionPlan> expressionPlans, boolean[] isInner)

LOCogroup(OperatorPlan plan, MultiMap<Integer,LogicalExpressionPlan> expressionPlans, LOCogroup.GROUPTYPE groupType, boolean[] isInner)

Method Summary

void	accept(PlanVisitor v) Accept a visitor at this node in the graph.
MultiMap<Integer,LogicalExpressionPlan>	getExpressionPlans()
Map<Integer,Long>	getGeneratedInputUids() Returns an Unmodifiable Map of Input Number to Uid
LOCogroup.GROUPTYPE	getGroupType()
boolean[]	getInner()
List<Operator>	getInputs(LogicalPlan plan)
LogicalSchema	getSchema() Get the schema for the output of this relational operator.
boolean	isEqual(Operator other) This is like a shallow equals comparison.
void	resetGroupType()
void	resetUid() Erase all cached uid, regenerate uid when we regenerating schema.
void	setExpressionPlans(MultiMap<Integer,LogicalExpressionPlan> plans)
void	setGroupType(LOCogroup.GROUPTYPE gt)
void	setInnerFlags(boolean[] flags)

Methods inherited from class org.apache.pig.newplan.logical.relational.LogicalRelationalOperator

checkEquality, getAlias, getCustomPartitioner, getLineNumber, getRequestedParallelisam, isPinnedOption, neverUseForRealSetSchema, pinOption, resetSchema, setAlias, setCustomPartitioner, setRequestedParallelism, setSchema, toString

Methods inherited from class org.apache.pig.newplan.Operator

annotate, getAnnotation, getLocation, getName, getPlan, removeAnnotation, setLocation, setPlan

Methods inherited from class java.lang.Object

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

Field Detail

OPTION_GROUPTYPE

public static final Integer OPTION_GROUPTYPE

static constant to refer to the option of selecting a group type

Constructor Detail

LOCogroup

public LOCogroup(LogicalPlan plan)

Constructor for use in defining rule patterns

Parameters:

plan -

LOCogroup

public LOCogroup(OperatorPlan plan,
                 MultiMap<Integer,LogicalExpressionPlan> expressionPlans,
                 boolean[] isInner)

LOCogroup

public LOCogroup(OperatorPlan plan,
                 MultiMap<Integer,LogicalExpressionPlan> expressionPlans,
                 LOCogroup.GROUPTYPE groupType,
                 boolean[] isInner)

Method Detail

getSchema

public LogicalSchema getSchema()
                        throws FrontendException

Description copied from class: LogicalRelationalOperator

Get the schema for the output of this relational operator. This does not merely return the schema variable. If schema is not yet set, this will attempt to construct it. Therefore it is abstract since each operator will need to construct its schema differently.

Specified by:

getSchema in class LogicalRelationalOperator

Returns:

the schema

Throws:

FrontendException

accept

public void accept(PlanVisitor v)
            throws FrontendException

Description copied from class: Operator

Accept a visitor at this node in the graph.

Specified by:

accept in class Operator

Parameters:

v - Visitor to accept.

Throws:

FrontendException

isEqual

public boolean isEqual(Operator other)
                throws FrontendException

Description copied from class: Operator

This is like a shallow equals comparison. It returns true if two operators have equivalent properties even if they are different objects. Here properties mean equivalent plan and equivalent name.

Specified by:

isEqual in class Operator

Returns:

true if two object have equivalent properties, else false

Throws:

FrontendException

getGroupType

public LOCogroup.GROUPTYPE getGroupType()

resetGroupType

public void resetGroupType()

getGeneratedInputUids

public Map<Integer,Long> getGeneratedInputUids()

Returns an Unmodifiable Map of Input Number to Uid

Returns:

Unmodifiable Map

getExpressionPlans

public MultiMap<Integer,LogicalExpressionPlan> getExpressionPlans()

setExpressionPlans

public void setExpressionPlans(MultiMap<Integer,LogicalExpressionPlan> plans)

setGroupType

public void setGroupType(LOCogroup.GROUPTYPE gt)

setInnerFlags

public void setInnerFlags(boolean[] flags)

getInner

public boolean[] getInner()

resetUid

public void resetUid()

Description copied from class: LogicalRelationalOperator

Erase all cached uid, regenerate uid when we regenerating schema. This process currently only used in ImplicitSplitInsert, which will insert split and invalidate some uids in plan

Overrides:

resetUid in class LogicalRelationalOperator

getInputs

public List<Operator> getInputs(LogicalPlan plan)