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 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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 */
class ConstExpEvaluator extends LogicalExpressionVisitor {
    Stack<ConstantExpression> result;


    ConstExpEvaluator(OperatorPlan plan) throws FrontendException {
        super(plan, new ReverseDependencyOrderWalker(plan));
        result = new Stack<ConstantExpression>();
    }

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class DNFPlanGenerator extends LogicalExpressionVisitor {
    private OperatorPlan dnfPlan = null;
    Stack<LogicalExpression> result;


    DNFPlanGenerator(OperatorPlan plan) throws FrontendException {
        super(plan, new ReverseDependencyOrderWalker(plan));
        result = new Stack<LogicalExpression>();
    }

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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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                OperatorPlan expPlan, 
                Map<Long, FuncSpec> uid2LoadFuncMap,
                CompilationMessageCollector msgCollector
        )
        throws FrontendException {
            super(expPlan, new ReverseDependencyOrderWalker(expPlan));
            this.uid2LoadFuncMap = uid2LoadFuncMap;
            this.msgCollector = msgCollector;
        }

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        private Map<Long, FuncSpec> uid2LoadFuncMap;


        public LineageFindExpVisitor(LogicalExpressionPlan plan,
                Map<Long, FuncSpec> uid2LoadFuncMap) throws FrontendException {
            super(plan, new ReverseDependencyOrderWalker(plan));
            this.uid2LoadFuncMap = uid2LoadFuncMap;
        }

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    // a schema. They may be the uids of lower level fields of complex fields
    // that have their own schema.
    static private class ColumnDependencyVisitor extends LogicalRelationalNodesVisitor {      
        
        public ColumnDependencyVisitor(OperatorPlan plan) throws FrontendException {
            super(plan, new ReverseDependencyOrderWalker(plan));            
        }

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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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        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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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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