org.apache.tajo.plan

Class LogicalOptimizer

java.lang.Object

org.apache.tajo.plan.LogicalOptimizer

@InterfaceStability.Evolving
public class LogicalOptimizer
extends Object

This class optimizes a logical plan.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LogicalOptimizer.JoinCostComputer
static class	LogicalOptimizer.JoinOrderStringBuilder

Constructor Summary

Constructors

Constructor and Description
LogicalOptimizer(TajoConf conf)

Method Summary

Methods

Modifier and Type	Method and Description
void	addRuleAfterToJoinOpt(LogicalPlanRewriteRule rewriteRule)
LogicalNode	optimize(LogicalPlan plan)
LogicalNode	optimize(OverridableConf context, LogicalPlan plan)

Methods inherited from class java.lang.Object

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

Constructor Detail

LogicalOptimizer

public LogicalOptimizer(TajoConf conf)

Method Detail

addRuleAfterToJoinOpt

public void addRuleAfterToJoinOpt(LogicalPlanRewriteRule rewriteRule)

optimize

public LogicalNode optimize(LogicalPlan plan)
                     throws PlanningException

Throws:

PlanningException

optimize

public LogicalNode optimize(OverridableConf context,
                   LogicalPlan plan)
                     throws PlanningException

Throws:

PlanningException