Examples of PlanWalker

org.apache.pig.experimental.plan.PlanWalker
org.apache.pig.impl.plan.PlanWalker
PlanWalker encapsulates the logic to traverse a plan. It is used only by visitors. All walkers must be constructed in a way that they only visit a given node once in a traversal.
org.apache.pig.newplan.PlanWalker

Examples of org.apache.pig.newplan.PlanWalker


        currentPlan = new PhysicalPlan();


//        PlanWalker childWalker = currentWalker
//                .spawnChildWalker(filter.getFilterPlan());
        PlanWalker childWalker = new ReverseDependencyOrderWalkerWOSeenChk(filter.getFilterPlan());
        pushWalker(childWalker);
        //currentWalker.walk(this);
        currentWalker.walk(
                new ExpToPhyTranslationVisitor( currentWalker.getPlan(), 
                        childWalker, filter, currentPlan, logToPhyMap ) );

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Examples of org.apache.pig.newplan.PlanWalker


        // convert all the logical expression plans to physical expression plans
        currentPlans.push(currentPlan);
        for (LogicalExpressionPlan plan : logPlans) {
            currentPlan = new PhysicalPlan();
            PlanWalker childWalker = new ReverseDependencyOrderWalkerWOSeenChk(plan);
            pushWalker(childWalker);
            childWalker.walk(new ExpToPhyTranslationVisitor( currentWalker.getPlan(), 
                    childWalker, sort, currentPlan, logToPhyMap));
            sortPlans.add(currentPlan);
            popWalker();
        }
        currentPlan = currentPlans.pop();

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Examples of org.apache.pig.newplan.PlanWalker

        // The physical plan should contain the expression plan for this predecessor plus
        // the subtree starting with this predecessor
        for (int i=0; i<exps.size(); i++) {
            currentPlan = new PhysicalPlan();
            // translate the expression plan
            PlanWalker childWalker = new ReverseDependencyOrderWalkerWOSeenChk(exps.get(i));
            pushWalker(childWalker);
            childWalker.walk(new ExpToPhyTranslationVisitor(exps.get(i),
                    childWalker, gen, currentPlan, logToPhyMap));            
            popWalker();
            
            List<Operator> leaves = exps.get(i).getSinks();
            for(Operator l: leaves) {
                PhysicalOperator op = logToPhyMap.get(l);
                if (l instanceof ProjectExpression ) {
                    int input = ((ProjectExpression)l).getInputNum();                    
                    
                    // for each sink projection, get its input logical plan and translate it
                    Operator pred = preds.get(input);
                    childWalker = new SubtreeDependencyOrderWalker(inner, pred);
                    pushWalker(childWalker);
                    childWalker.walk(this);
                    popWalker();
                    
                    // get the physical operator of the leaf of input logical plan
                    PhysicalOperator leaf = logToPhyMap.get(pred);

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Examples of org.apache.pig.newplan.PlanWalker

        for( LogicalExpressionPlan lp : plans ) {
            currentPlan = new PhysicalPlan();
            
            // We spawn a new Dependency Walker and use it 
            // PlanWalker childWalker = currentWalker.spawnChildWalker(lp);
            PlanWalker childWalker = new ReverseDependencyOrderWalkerWOSeenChk(lp);
            
            // Save the old walker and use childWalker as current Walker
            pushWalker(childWalker);
            
            // We create a new ExpToPhyTranslationVisitor to walk the ExpressionPlan

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Examples of org.apache.pig.newplan.PlanWalker


        currentPlan = new PhysicalPlan();


//        PlanWalker childWalker = currentWalker
//                .spawnChildWalker(filter.getFilterPlan());
        PlanWalker childWalker = new ReverseDependencyOrderWalkerWOSeenChk(loSplitOutput.getFilterPlan());
        pushWalker(childWalker);
        //currentWalker.walk(this);
        currentWalker.walk(
                new ExpToPhyTranslationVisitor( currentWalker.getPlan(), 
                        childWalker, loSplitOutput, currentPlan, logToPhyMap) );

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Examples of org.apache.pig.newplan.PlanWalker

    
    @Override
    public void visit(LOForEach foreach) throws FrontendException {
        foreach.resetSchema();
        OperatorPlan innerPlan = foreach.getInnerPlan();
        PlanWalker newWalker = currentWalker.spawnChildWalker(innerPlan);
        pushWalker(newWalker);
        currentWalker.walk(this);
        popWalker();
        foreach.getSchema();
    }

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Examples of org.apache.pig.newplan.PlanWalker

    
    @Override
    public void visit(LOForEach foreach) throws FrontendException {
        foreach.resetUid();
        OperatorPlan innerPlan = foreach.getInnerPlan();
        PlanWalker newWalker = currentWalker.spawnChildWalker(innerPlan);
        pushWalker(newWalker);
        currentWalker.walk(this);
        popWalker();
    }

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Examples of org.apache.pig.newplan.PlanWalker

    public void visit(LOForEach foreach) throws FrontendException {
        currentOp = foreach;
        // We have an Inner OperatorPlan in ForEach, so we go ahead
        // and work on that plan
        OperatorPlan innerPlan = foreach.getInnerPlan();
        PlanWalker newWalker = currentWalker.spawnChildWalker(innerPlan);
        pushWalker(newWalker);
        currentWalker.walk(this);
        popWalker();
    }

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Examples of org.apache.pig.newplan.PlanWalker


        currentPlan = new PhysicalPlan();


//        PlanWalker childWalker = currentWalker
//                .spawnChildWalker(filter.getFilterPlan());
        PlanWalker childWalker = new ReverseDependencyOrderWalkerWOSeenChk(filter.getFilterPlan());
        pushWalker(childWalker);
        //currentWalker.walk(this);
        currentWalker.walk(
                new ExpToPhyTranslationVisitor( currentWalker.getPlan(), 
                        childWalker, filter, currentPlan, logToPhyMap ) );

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Examples of org.apache.pig.newplan.PlanWalker


        // convert all the logical expression plans to physical expression plans
        currentPlans.push(currentPlan);
        for (LogicalExpressionPlan plan : logPlans) {
            currentPlan = new PhysicalPlan();
            PlanWalker childWalker = new ReverseDependencyOrderWalkerWOSeenChk(plan);
            pushWalker(childWalker);
            childWalker.walk(new ExpToPhyTranslationVisitor( currentWalker.getPlan(), 
                    childWalker, sort, currentPlan, logToPhyMap));
            sortPlans.add(currentPlan);
            popWalker();
        }
        currentPlan = currentPlans.pop();

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