org.apache.tajo.plan

Class LogicalOptimizer.JoinCostComputer

java.lang.Object

org.apache.tajo.plan.visitor.BasicLogicalPlanVisitor<org.apache.tajo.plan.LogicalOptimizer.CostContext,LogicalNode>

org.apache.tajo.plan.LogicalOptimizer.JoinCostComputer

All Implemented Interfaces:

LogicalPlanVisitor<org.apache.tajo.plan.LogicalOptimizer.CostContext,LogicalNode>

Enclosing class:

LogicalOptimizer

public static class LogicalOptimizer.JoinCostComputer
extends BasicLogicalPlanVisitor<org.apache.tajo.plan.LogicalOptimizer.CostContext,LogicalNode>

Constructor Summary

Constructors

Constructor and Description
LogicalOptimizer.JoinCostComputer()

Method Summary

Methods

Modifier and Type	Method and Description
static double	computeCost(LogicalPlan plan, LogicalPlan.QueryBlock block)
LogicalNode	visitJoin(org.apache.tajo.plan.LogicalOptimizer.CostContext joinGraphContext, LogicalPlan plan, LogicalPlan.QueryBlock block, JoinNode joinNode, Stack<LogicalNode> stack)

Methods inherited from class org.apache.tajo.plan.visitor.BasicLogicalPlanVisitor

postHook, preHook, visit, visit, visitAlterTable, visitAlterTablespace, visitCreateDatabase, visitCreateTable, visitDistinctGroupby, visitDropDatabase, visitDropTable, visitEvalExpr, visitExcept, visitFilter, visitGroupBy, visitHaving, visitInsert, visitIntersect, visitLimit, visitPartitionedTableScan, visitProjection, visitRoot, visitScan, visitSetSession, visitSort, visitStoreTable, visitTableSubQuery, visitTruncateTable, visitUnion, visitWindowAgg

Methods inherited from class java.lang.Object

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

Constructor Detail

LogicalOptimizer.JoinCostComputer

public LogicalOptimizer.JoinCostComputer()

Method Detail

computeCost

public static double computeCost(LogicalPlan plan,
                 LogicalPlan.QueryBlock block)
                          throws PlanningException

Throws:

PlanningException

visitJoin

public LogicalNode visitJoin(org.apache.tajo.plan.LogicalOptimizer.CostContext joinGraphContext,
                    LogicalPlan plan,
                    LogicalPlan.QueryBlock block,
                    JoinNode joinNode,
                    Stack<LogicalNode> stack)
                      throws PlanningException

Specified by:

visitJoin in interface LogicalPlanVisitor<org.apache.tajo.plan.LogicalOptimizer.CostContext,LogicalNode>

Overrides:

visitJoin in class BasicLogicalPlanVisitor<org.apache.tajo.plan.LogicalOptimizer.CostContext,LogicalNode>

Throws:

PlanningException