Examples of org.apache.pig.newplan.ReverseDependencyOrderWalker

org.apache.pig.newplan.ReverseDependencyOrderWalker
Visit a plan in the reverse of the dependency order. That is, every node after every node that depends on it is visited. Thus this is equivalent to doing a reverse topilogical sort on the graph and then visiting it in order.

        new HashMap<LOLoad,Pair<Map<Integer,Set<String>>,Set<Integer>>>();
    private boolean columnPrune;


    public ColumnPruneVisitor(OperatorPlan plan, Map<LOLoad,Pair<Map<Integer,Set<String>>,Set<Integer>>> requiredItems,
            boolean columnPrune) throws FrontendException {
        super(plan, new ReverseDependencyOrderWalker(plan));
        this.columnPrune = columnPrune;
        this.requiredItems = requiredItems;
    }

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}


class FieldSchemaResetter extends AllSameExpressionVisitor {


    protected FieldSchemaResetter(OperatorPlan p) throws FrontendException {
        super(p, new ReverseDependencyOrderWalker(p));
    }

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    private static class NestedRelationalOperatorFinder extends AllSameRalationalNodesVisitor {
        String aliasOfOperator;
        LogicalRelationalOperator opFound = null;
        public NestedRelationalOperatorFinder(LogicalPlan plan, String alias) throws FrontendException {
            super(plan, new ReverseDependencyOrderWalker(plan));
            aliasOfOperator = alias;
        }

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

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            @Override
            protected LogicalExpressionVisitor getVisitor(
                    LogicalExpressionPlan exprPlan) throws FrontendException {
                return new CastExpFinder(exprPlan, new ReverseDependencyOrderWalker(exprPlan));
            }

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Related Classes of org.apache.pig.newplan.ReverseDependencyOrderWalker

org.apache.pig.newplan.logical.optimizer.ExpressionUidResetter

org.apache.pig.newplan.logical.optimizer.FieldSchemaResetter

org.apache.pig.newplan.logical.relational.LOForEach$NestedRelationalOperatorFinder

org.apache.pig.newplan.logical.relational.LOSort$ResetProjectionAttachedRelationalOpVisitor

org.apache.pig.newplan.logical.rules.ColumnPruneHelper$ColumnDependencyVisitor

org.apache.pig.newplan.logical.rules.ColumnPruneVisitor

org.apache.pig.newplan.logical.rules.ConstExpEvaluator

org.apache.pig.newplan.logical.rules.DNFPlanGenerator

org.apache.pig.newplan.logical.rules.LogicalExpressionSimplifier$LogicalExpressionSimplifierTransformer

org.apache.pig.newplan.logical.rules.MapKeysPruneHelper$FullMapCollector

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