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.

        private LogicalRelationalOperator attachedRelationalOp;


        ResetProjectionAttachedRelationalOpVisitor (
            LogicalExpressionPlan plan, LogicalRelationalOperator op )
            throws FrontendException {
            super(plan, new ReverseDependencyOrderWalker(plan));
            this.attachedRelationalOp = op;


        }

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

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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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            }


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

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            CompilationMessageCollector msgCollector,
            LogicalRelationalOperator relOp
    )
    throws FrontendException {


        super(expPlan, new ReverseDependencyOrderWalker(expPlan));
        this.msgCollector = msgCollector;
        this.currentRelOp = relOp;
        //reset field schema of all expression operators because
        // it needs to be re-evaluated after correct types are set
        FieldSchemaResetter sr = new FieldSchemaResetter(expPlan);

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    static class FieldSchemaResetter extends AllSameExpressionVisitor {


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

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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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