Examples of org.apache.pig.experimental.plan.PlanWalker.walk()

Package org.apache.pig.experimental.plan

Class org.apache.pig.experimental.plan.PlanWalker

Examples of org.apache.pig.experimental.plan.PlanWalker.walk()

org.apache.pig.experimental.plan.PlanWalker.walk()
Begin traversing the graph. @param visitor Visitor this walker is being used by. This can't be set inthe constructor because the visitor is constructing this class, and does not yet have a 'this' pointer to send as an argument. @throws VisitorException if an error is encountered while walking.

        for (int i=0; i<exps.size(); i++) {
            currentPlan = new PhysicalPlan();
            // translate the expression plan
            PlanWalker childWalker = new ReverseDependencyOrderWalker(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) {

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                    // 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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