org.apache.pig.newplan.logical.expression

Class LogicalExpressionPlan

java.lang.Object

org.apache.pig.newplan.BaseOperatorPlan

org.apache.pig.newplan.logical.expression.LogicalExpressionPlan

All Implemented Interfaces:

OperatorPlan

public class LogicalExpressionPlan
extends BaseOperatorPlan

A plan containing LogicalExpressionOperators.

Field Summary

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

fromEdges, log, ops, softFromEdges, softToEdges, toEdges

Constructor Summary

Constructors

Constructor and Description
LogicalExpressionPlan()

Method Summary

Methods

Modifier and Type	Method and Description
LogicalExpressionPlan	deepCopy()
void	explain(PrintStream ps, String format, boolean verbose)
boolean	isEqual(OperatorPlan other) This is like a shallow comparison.
List<Operator>	merge(LogicalExpressionPlan lgExpPlan) Merge all nodes in lgExpPlan, keep the connections

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

add, connect, connect, createSoftLink, disconnect, getOperators, getPredecessors, getSinks, getSoftLinkPredecessors, getSoftLinkSuccessors, getSources, getSuccessors, insertBetween, isConnected, isEqual, moveTree, pathExists, remove, removeAndReconnect, removeSoftLink, replace, size, toString, trimBelow

Methods inherited from class java.lang.Object

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

Constructor Detail

LogicalExpressionPlan

public LogicalExpressionPlan()

Method Detail

isEqual

public boolean isEqual(OperatorPlan other)
                throws FrontendException

Description copied from interface: OperatorPlan

This is like a shallow comparison. Two plans are equal if they have equivalent operators and equivalent structure.

Specified by:

isEqual in interface OperatorPlan

Overrides:

isEqual in class BaseOperatorPlan

Parameters:

other - object to compare

Returns:

boolean if both the plans are equivalent

Throws:

FrontendException

explain

public void explain(PrintStream ps,
           String format,
           boolean verbose)
             throws FrontendException

Overrides:

explain in class BaseOperatorPlan

Throws:

FrontendException

merge

public List<Operator> merge(LogicalExpressionPlan lgExpPlan)

Merge all nodes in lgExpPlan, keep the connections

Parameters:

lgExpPlan - plan to merge

Returns:

sources of the merged plan

deepCopy

public LogicalExpressionPlan deepCopy()
                               throws FrontendException

Throws:

FrontendException