Package org.apache.pig.newplan.logical.expression

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

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    abstract protected LogicalExpressionVisitor getVisitor(LogicalExpressionPlan expr) throws FrontendException;
   
    @Override
    public void visit(LOFilter filter) throws FrontendException {
        currentOp = filter;
        LogicalExpressionVisitor v = getVisitor(filter.getFilterPlan());
        v.visit();
    }
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    @Override
    public void visit(LOJoin join) throws FrontendException {
        currentOp = join;
        Collection<LogicalExpressionPlan> c = join.getExpressionPlanValues();
        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 visit(LOGenerate gen ) throws FrontendException {
        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 visit(LOSplitOutput splitOutput) throws FrontendException {
        currentOp = splitOutput;
        LogicalExpressionVisitor v = getVisitor(splitOutput.getFilterPlan());
        v.visit();
    }
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    @Override
    public void visit(LOSort sort) throws FrontendException {
        currentOp = sort;
        Collection<LogicalExpressionPlan> c = sort.getSortColPlans();
        for (LogicalExpressionPlan plan : c) {
            LogicalExpressionVisitor v = getVisitor(plan);
            v.visit();
        }
    }
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                // that operator is also going to be enqueued.
                currOp.accept( new AllExpressionVisitor( plan, new DependencyOrderWalker( plan ) ) {
                        @Override
                        protected LogicalExpressionVisitor getVisitor(LogicalExpressionPlan exprPlan)
                        throws FrontendException {
                            return new LogicalExpressionVisitor( exprPlan, new DependencyOrderWalker( exprPlan ) ) {
                                @Override
                                public void visit(ScalarExpression expr) throws FrontendException {
                                    Operator refOp = expr.getImplicitReferencedOperator();
                                    if( !queue.contains( refOp ) )
                                        queue.add( refOp );
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        LogicalPlan plan = validate( query );
        System.out.println( "Plan after setter: " + plan.toString() );
        new AllExpressionVisitor( plan, new DependencyOrderWalker( plan ) ) {
            @Override
            protected LogicalExpressionVisitor getVisitor(LogicalExpressionPlan exprPlan) throws FrontendException {
                return new LogicalExpressionVisitor( exprPlan, new DependencyOrderWalker( exprPlan ) ) {
                    @Override
                    public void visit(ProjectExpression expr) throws FrontendException {
                        Assert.assertTrue( null == expr.getColAlias() );
                        Assert.assertTrue( expr.getColNum() >= -1 );
                    }
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                // that operator is also going to be enqueued.
                currOp.accept( new AllExpressionVisitor( plan, new DependencyOrderWalker( plan ) ) {
                        @Override
                        protected LogicalExpressionVisitor getVisitor(LogicalExpressionPlan exprPlan)
                        throws FrontendException {
                            return new LogicalExpressionVisitor( exprPlan, new DependencyOrderWalker( exprPlan ) ) {
                                @Override
                                public void visit(ScalarExpression expr) throws FrontendException {
                                    Operator refOp = expr.getImplicitReferencedOperator();
                                    if( !queue.contains( refOp ) )
                                        queue.add( refOp );
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Related Classes of org.apache.pig.newplan.logical.expression.LogicalExpressionVisitor

  • org.apache.pig.newplan.logical.optimizer.AllExpressionVisitor
  • org.apache.pig.newplan.logical.visitor.ColumnAliasConversionVisitor
  • org.apache.pig.newplan.logical.visitor.ScalarVisitor
  • org.apache.pig.parser.TestColumnAliasConversion
  • org.apache.pig.PigServer$Graph
  • org.apache.pig.impl.logicalLayer.FrontendException
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