Package org.apache.pig.experimental.logical.expression

Examples of org.apache.pig.experimental.logical.expression.LogicalExpressionVisitor

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    abstract protected LogicalExpressionVisitor getVisitor(LogicalExpressionPlan expr);
   
    @Override
    public void visitLOFilter(LOFilter filter) throws IOException {
        currentOp = filter;
        LogicalExpressionVisitor v = getVisitor(filter.getFilterPlan());
        v.visit();
    }
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    @Override
    public void visitLOJoin(LOJoin join) throws IOException {
        currentOp = join;
        Collection<LogicalExpressionPlan> c = join.getExpressionPlans();
        for (LogicalExpressionPlan plan : c) {
            LogicalExpressionVisitor v = getVisitor(plan);
            v.visit();
        }
    }
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        currentOp = cg;
        MultiMap<Integer, LogicalExpressionPlan> expressionPlans = cg.getExpressionPlans();
        for( Integer key : expressionPlans.keySet() ) {
            Collection<LogicalExpressionPlan> exprPlans = expressionPlans.get(key);
            for( LogicalExpressionPlan plan : exprPlans ) {
                LogicalExpressionVisitor v = getVisitor(plan);
                v.visit();
            }
        }
    }
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    @Override
    public void visitLOGenerate(LOGenerate gen ) throws IOException {
        currentOp = gen;
        Collection<LogicalExpressionPlan> plans = gen.getOutputPlans();
        for( LogicalExpressionPlan plan : plans ) {
            LogicalExpressionVisitor v = getVisitor(plan);
            v.visit();
        }
    }
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        // the expression in LOInnerLoad contains info relative from LOForEach
        // so use LOForeach as currentOp
        currentOp = load.getLOForEach();
        LogicalExpressionPlan exp = (LogicalExpressionPlan)load.getProjection().getPlan();
      
        LogicalExpressionVisitor v = getVisitor(exp);
        v.visit();      
    }
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    }
   
    @Override
    public void visitLOSplitOutput(LOSplitOutput splitOutput) throws IOException {
        currentOp = splitOutput;
        LogicalExpressionVisitor v = getVisitor(splitOutput.getFilterPlan());
        v.visit();
    }
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    @Override
    public void visitLOFilter(LOFilter op) throws IOException {
        printLevel();
        stream.println( op.toString() );
        LogicalExpressionVisitor v = getVisitor(op.getFilterPlan());
        level++;
        v.visit();
        level--;
    }
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    @Override
    public void visitLOGenerate(LOGenerate op) throws IOException {
        printLevel();       
        stream.println( op.toString() );
        List<LogicalExpressionPlan> plans = op.getOutputPlans();
        LogicalExpressionVisitor v = null;
        level++;
        for( LogicalExpressionPlan plan : plans ) {
            v = getVisitor(plan);
            v.visit();
        }
        level--;
    }
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        printLevel();
        stream.println( op.toString() );
        MultiMap<Integer,LogicalExpressionPlan> exprPlans = op.getExpressionPlans();
        for( Integer key : exprPlans.keySet() ) {
            Collection<LogicalExpressionPlan> plans = exprPlans.get(key);
            LogicalExpressionVisitor v = null;
            level++;
            for( LogicalExpressionPlan plan : plans ) {
                v = getVisitor(plan);
                v.visit();
            }
            level--;
        }
    }
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    @Override
    public void visitLOSplitOutput(LOSplitOutput op) throws IOException {
        printLevel();
        stream.println( op.toString() );
        LogicalExpressionVisitor v = getVisitor(op.getFilterPlan());
        level++;
        v.visit();
        level--;
    }
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Related Classes of org.apache.pig.experimental.logical.expression.LogicalExpressionVisitor

  • org.apache.pig.experimental.logical.optimizer.AllExpressionVisitor
  • org.apache.pig.experimental.logical.optimizer.PlanPrinter
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