Examples of org.apache.pig.experimental.plan.DependencyOrderWalker

Package org.apache.pig.experimental.plan

Examples of org.apache.pig.experimental.plan.DependencyOrderWalker

org.apache.pig.experimental.plan.DependencyOrderWalker
A walker to walk graphs in dependency order. It is guaranteed that a node will not be visited until all of its predecessors have been visited. This is equivalent to doing a topilogical sort on the graph and then visiting the nodes in order.

        
        plan.connect(fred, joe);
        plan.connect(joe, bob);
        
        SillyVisitor v =
            new SillyVisitor(plan, new DependencyOrderWalker(plan));
        
        v.visit();
        
        String s = v.getVisitPattern();

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        plan.connect(joe, bob);
        plan.connect(bob, jill);
        plan.connect(jane, jill);
        
        SillyVisitor v =
            new SillyVisitor(plan, new DependencyOrderWalker(plan));
        
        v.visit();
        
        String s = v.getVisitPattern();

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        plan.connect(joe, bob);
        plan.connect(bob, jill);
        plan.connect(bob, jane);
        
        SillyVisitor v =
            new SillyVisitor(plan, new DependencyOrderWalker(plan));
        
        v.visit();
        
        String s = v.getVisitPattern();

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    }
    
    private static class ProjectionFinder extends AllExpressionVisitor {


        public ProjectionFinder(OperatorPlan plan) {
            super(plan, new DependencyOrderWalker(plan));
        }

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    // This value points to the current LogicalRelationalOperator we are working on
    protected LogicalRelationalOperator currentOp;
    
    public ExpToPhyTranslationVisitor(OperatorPlan plan, LogicalRelationalOperator op, PhysicalPlan phyPlan, Map<Operator, PhysicalOperator> map) {
        super(plan, new DependencyOrderWalker(plan));
        currentOp = op;
        logToPhyMap = map;
        currentPlan = phyPlan;
        currentPlans = new Stack<PhysicalPlan>();
    }

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    /**
     * @param plan LogicalPlan that this stamper will act on.
     */
    public UidStamper(OperatorPlan plan) {
        super(plan, new DependencyOrderWalker(plan));
    }

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        static class MapExprMarker extends LogicalExpressionVisitor {


            Map<Long,Set<String>> inputUids = null;
            
            protected MapExprMarker(OperatorPlan p) {
                super(p, new DependencyOrderWalker(p));
                inputUids = new HashMap<Long,Set<String>>();
            }

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    }
    
    private static class SchemaVisitor extends AllSameVisitor {


        public SchemaVisitor(OperatorPlan plan) {
            super(plan, new DependencyOrderWalker(plan));
        }

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import org.apache.pig.impl.util.MultiMap;


public class LogToPhyTranslationVisitor extends LogicalPlanVisitor {
    
    public LogToPhyTranslationVisitor(OperatorPlan plan) {
        super(plan, new DependencyOrderWalker(plan));
        currentPlan = new PhysicalPlan();
        logToPhyMap = new HashMap<Operator, PhysicalOperator>();
        currentPlans = new Stack<PhysicalPlan>();
    }

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Related Classes of org.apache.pig.experimental.plan.DependencyOrderWalker

org.apache.pig.experimental.logical.expression.ExpToPhyTranslationVisitor

org.apache.pig.experimental.logical.optimizer.ProjectionPatcher$ProjectionFinder

org.apache.pig.experimental.logical.optimizer.SchemaPatcher$SchemaVisitor

org.apache.pig.experimental.logical.optimizer.UidStamper

org.apache.pig.experimental.logical.relational.LogToPhyTranslationVisitor

org.apache.pig.experimental.logical.rules.MapKeysPruneHelper$MapMarker$MapExprMarker

org.apache.pig.test.TestExperimentalOperatorPlan

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