Examples of org.apache.pig.experimental.logical.rules.ColumnMapKeyPrune

Package org.apache.pig.experimental.logical.rules

Examples of org.apache.pig.experimental.logical.rules.ColumnMapKeyPrune

org.apache.pig.experimental.logical.rules.ColumnMapKeyPrune
This Rule prunes columns and map keys and set to loader. This rule depends on MapKeysPruneHelper to calculate what keys are required for a loader, and ColumnPruneHelper to calculate the required columns for a loader. Then it combines the map keys and columns info to set into the loader.

            // run filter rule
            Set<Rule> s = new HashSet<Rule>();
            List<Set<Rule>> ls = new ArrayList<Set<Rule>>();
            ls.add(s);
            // Add the PruneMap Filter
            Rule r = new ColumnMapKeyPrune("PruneMapKeys");
            s.add(r);            
            
            printPlan((org.apache.pig.experimental.logical.relational.LogicalPlan)newPlan);
            
            // Run the optimizer

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        // This set is used for pruning columns and maps
      
        s = new HashSet<Rule>();
        ls.add(s);
        // Add the PruneMap Filter
        r = new ColumnMapKeyPrune("ColumnMapKeyPrune");
        s.add(r);
        
        // Add LOForEach operator to trim off columns
        
        s = new HashSet<Rule>();

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        }
        
        protected List<Set<Rule>> buildRuleSets() {            
            List<Set<Rule>> ls = new ArrayList<Set<Rule>>();
            
            Rule r = new ColumnMapKeyPrune("ColumnMapKeyPrune");
            Set<Rule> s = new HashSet<Rule>();
            s.add(r);            
            ls.add(s);
            
            r = new AddForEach("AddForEach");

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Related Classes of org.apache.pig.experimental.logical.rules.ColumnMapKeyPrune

org.apache.pig.experimental.logical.expression.LogicalExpressionPlan

org.apache.pig.experimental.logical.expression.ProjectExpression

org.apache.pig.experimental.logical.optimizer.LogicalPlanOptimizer

org.apache.pig.experimental.logical.relational.LOForEach

org.apache.pig.experimental.logical.relational.LOGenerate

org.apache.pig.experimental.logical.relational.LogicalPlan

org.apache.pig.experimental.logical.relational.LogicalRelationalOperator

org.apache.pig.experimental.logical.relational.LogicalSchema

org.apache.pig.experimental.logical.relational.LOInnerLoad

org.apache.pig.experimental.plan.Operator

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