Examples of DependencyOrderWalker

org.apache.pig.experimental.plan.DependencyOrderWalker
A walker to walk graphs in dependency order. It is guaranteed that a node will not be visited until all of its predecessors have been visited. This is equivalent to doing a topilogical sort on the graph and then visiting the nodes in order.
org.apache.pig.impl.plan.DependencyOrderWalker
DependencyOrderWalker traverses the graph in such a way that no node is visited before all the nodes it depends on have been visited. Beyond this, it does not guarantee any particular order. So, you have a graph with node 1 2 3 4, and edges 1->3, 2->3, and 3->4, this walker guarnatees that 1 and 2 will be visited before 3 and 3 before 4, but it does not guarantee whether 1 or 2 will be visited first.
org.apache.pig.newplan.DependencyOrderWalker
A walker to walk graphs in dependency order. It is guaranteed that a node will not be visited until all of its predecessors have been visited. This is equivalent to doing a topilogical sort on the graph and then visiting the nodes in order.

Examples of org.apache.pig.impl.plan.DependencyOrderWalker

     *            the logical filter operator that has to be visited
     * @throws VisitorException
     */
    protected void visit(LOFilter filter) throws VisitorException {
        // Visit the condition for the filter followed by the input
        PlanWalker w = new DependencyOrderWalker(filter.getComparisonPlan());
        pushWalker(w);
        w.walk(this);
        popWalker();
    }

View Full Code Here

Examples of org.apache.pig.impl.plan.DependencyOrderWalker

     * @throws VisitorException
     */
    protected void visit(LOGenerate g) throws VisitorException {
        // Visit the operators that are part of the foreach plan
        for(LogicalPlan lp: g.getGeneratePlans()) {
            PlanWalker w = new DependencyOrderWalker(lp);
            pushWalker(w);
            w.walk(this);
            popWalker();
        }
    }

View Full Code Here

Examples of org.apache.pig.impl.plan.DependencyOrderWalker

    }


    protected void visit(LOSplitOutput sop) throws VisitorException {
        LogicalPlan lp = sop.getConditionPlan();
        if (null != lp) {
            PlanWalker w = new DependencyOrderWalker(lp);
            pushWalker(w);
            w.walk(this);
            popWalker();
        }
    }

View Full Code Here

Examples of org.apache.pig.newplan.DependencyOrderWalker

import org.apache.pig.impl.util.Utils;


public class LogToPhyTranslationVisitor extends LogicalRelationalNodesVisitor {
    
    public LogToPhyTranslationVisitor(OperatorPlan plan) throws FrontendException {
        super(plan, new DependencyOrderWalker(plan));
        currentPlan = new PhysicalPlan();
        logToPhyMap = new HashMap<Operator, PhysicalOperator>();
        currentPlans = new Stack<PhysicalPlan>();
    }

View Full Code Here

Examples of org.apache.pig.newplan.DependencyOrderWalker

    // This value points to the current LogicalRelationalOperator we are working on
    protected LogicalRelationalOperator currentOp;
    
    public ExpToPhyTranslationVisitor(OperatorPlan plan, LogicalRelationalOperator op, PhysicalPlan phyPlan, 
            Map<Operator, PhysicalOperator> map) throws FrontendException {
        this(plan, new DependencyOrderWalker(plan), op, phyPlan, map);
    }

View Full Code Here

Examples of org.apache.pig.newplan.DependencyOrderWalker

    }
    
    public static class SortInfoSetter extends LogicalRelationalNodesVisitor {


        public SortInfoSetter(OperatorPlan plan) throws FrontendException {
            super(plan, new DependencyOrderWalker(plan));
        }

View Full Code Here

Examples of org.apache.pig.newplan.DependencyOrderWalker

import org.apache.pig.newplan.logical.relational.LogicalRelationalNodesVisitor;


public class SchemaResetter extends LogicalRelationalNodesVisitor {


    public SchemaResetter(OperatorPlan plan) throws FrontendException {
        super(plan, new DependencyOrderWalker(plan));
    }

View Full Code Here

Examples of org.apache.pig.newplan.DependencyOrderWalker

    }
    
    public static class ProjectionFinder extends AllExpressionVisitor {


        public ProjectionFinder(OperatorPlan plan) throws FrontendException {
            super(plan, new DependencyOrderWalker(plan));
        }

View Full Code Here

Examples of org.apache.pig.newplan.DependencyOrderWalker

        static class MapExprMarker extends LogicalExpressionVisitor {


            Map<Long,Set<String>> inputUids = null;
            
            protected MapExprMarker(OperatorPlan p) throws FrontendException {
                super(p, new DependencyOrderWalker(p));
                inputUids = new HashMap<Long,Set<String>>();
            }

View Full Code Here

Examples of org.apache.pig.newplan.DependencyOrderWalker

    
    static public class FullMapCollector extends AllExpressionVisitor {
        Set<Long> fullMapUids = new HashSet<Long>();


        protected FullMapCollector(OperatorPlan plan, Set<Long> fullMapUids) throws FrontendException {
            super(plan, new DependencyOrderWalker(plan));
            this.fullMapUids = fullMapUids;
        }

View Full Code Here

0 1 2 3 4 5

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.