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

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

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        innerPlan.add(l1);
        LOInnerLoad l2 = new LOInnerLoad(innerPlan, foreach, 1);
       
        List<LogicalExpressionPlan> eps = new ArrayList<LogicalExpressionPlan>();
        LogicalExpressionPlan p1 = new LogicalExpressionPlan();
        p1.add(new ProjectExpression(p1, DataType.BYTEARRAY, 0, 0));
        LogicalExpressionPlan p2 = new LogicalExpressionPlan();
        p2.add(new ProjectExpression(p2, DataType.BYTEARRAY, 1, 0));
        eps.add(p1);
        eps.add(p2);
       
        LOGenerate gen = new LOGenerate(innerPlan, eps, new boolean[] {false, true});
        innerPlan.add(gen);
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        innerPlan.add(l1);
        LOInnerLoad l2 = new LOInnerLoad(innerPlan, foreach2, 1);
       
        List<LogicalExpressionPlan>  eps = new ArrayList<LogicalExpressionPlan>();
        LogicalExpressionPlan p1 = new LogicalExpressionPlan();
        new ProjectExpression(p1, DataType.BYTEARRAY, 0, 0);
        LogicalExpressionPlan p2 = new LogicalExpressionPlan();       
        new ProjectExpression(p2, DataType.BAG, 1, 0);
        eps.add(p1);
        eps.add(p2);
       
        LOGenerate gen = new LOGenerate(innerPlan, eps, new boolean[] {false, true});
        innerPlan.add(gen);
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        assertEquals( 1, plans.size() );
       
        LogicalExpressionPlan exprPlan = plans.get(0);
        assertEquals( 1, exprPlan.getSinks().size() );
        assertEquals( ProjectExpression.class, exprPlan.getSinks().get(0).getClass() );
        ProjectExpression prj = (ProjectExpression) exprPlan.getSinks().get(0);
        assertEquals( loadSchema.getField(0).uid, prj.getUid() );
        assertEquals( 0, prj.getColNum() );
        assertEquals( 0, prj.getInputNum() );
    }
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        assertEquals( 2, plans.size() );
       
        LogicalExpressionPlan exprPlan = plans.get(0);
        assertEquals( 1, exprPlan.getSinks().size() );
        assertEquals( ProjectExpression.class, exprPlan.getSinks().get(0).getClass() );
        ProjectExpression prj = (ProjectExpression) exprPlan.getSinks().get(0);
        assertEquals( loadSchema.getField(0).uid, prj.getUid() );
        assertEquals( 0, prj.getColNum() );
        assertEquals( 0, prj.getInputNum() );
       
        LogicalExpressionPlan exprPlan2 = plans.get(1);
        assertEquals( 1, exprPlan2.getSinks().size() );
        assertEquals( ProjectExpression.class, exprPlan2.getSinks().get(0).getClass() );
        ProjectExpression prj2 = (ProjectExpression) exprPlan2.getSinks().get(0);
        assertEquals( loadSchema.getField(1).uid, prj2.getUid() );
        assertEquals( 1, prj2.getColNum() );
        assertEquals( 0, prj2.getInputNum() );
    }
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        assertEquals( 1, plans2.size() );
       
        LogicalExpressionPlan exprPlan = plans.get(0);
        assertEquals( 1, exprPlan.getSinks().size() );
        assertEquals( ProjectExpression.class, exprPlan.getSinks().get(0).getClass() );
        ProjectExpression prj = (ProjectExpression) exprPlan.getSinks().get(0);
        assertEquals( loadSchema.getField(0).uid, prj.getUid() );
        assertEquals( 0, prj.getColNum() );
        assertEquals( 0, prj.getInputNum() );
       
        LogicalExpressionPlan exprPlan2 = plans2.get(0);
        assertEquals( 1, exprPlan2.getSinks().size() );
        assertEquals( ProjectExpression.class, exprPlan2.getSinks().get(0).getClass() );
        ProjectExpression prj2 = (ProjectExpression) exprPlan2.getSinks().get(0);
        assertEquals( load2Schema.getField(0).uid, prj2.getUid() );
        assertEquals( 0, prj2.getColNum() );
        assertEquals( 1, prj2.getInputNum() );
    }
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        assertEquals( 2, plans2.size() );
       
        LogicalExpressionPlan exprPlan = plans.get(0);
        assertEquals( 1, exprPlan.getSinks().size() );
        assertEquals( ProjectExpression.class, exprPlan.getSinks().get(0).getClass() );
        ProjectExpression prj = (ProjectExpression) exprPlan.getSinks().get(0);
        assertEquals( loadSchema.getField(0).uid, prj.getUid() );
        assertEquals( 0, prj.getColNum() );
        assertEquals( 0, prj.getInputNum() );
       
        LogicalExpressionPlan exprPlan2 = plans.get(1);
        assertEquals( 1, exprPlan2.getSinks().size() );
        assertEquals( ProjectExpression.class, exprPlan2.getSinks().get(0).getClass() );
        ProjectExpression prj2 = (ProjectExpression) exprPlan2.getSinks().get(0);
        assertEquals( loadSchema.getField(1).uid, prj2.getUid() );
        assertEquals( 1, prj2.getColNum() );
        assertEquals( 0, prj2.getInputNum() );       
       
        LogicalExpressionPlan exprPlan3 = plans2.get(0);
        assertEquals( 1, exprPlan3.getSinks().size() );
        assertEquals( ProjectExpression.class, exprPlan3.getSinks().get(0).getClass() );
        ProjectExpression prj3 = (ProjectExpression) exprPlan3.getSinks().get(0);
        assertEquals( load2Schema.getField(0).uid, prj3.getUid() );
        assertEquals( 0, prj3.getColNum() );
        assertEquals( 1, prj3.getInputNum() );
       
        LogicalExpressionPlan exprPlan4 = plans2.get(1);
        assertEquals( 1, exprPlan4.getSinks().size() );
        assertEquals( ProjectExpression.class, exprPlan4.getSinks().get(0).getClass() );
        ProjectExpression prj4 = (ProjectExpression) exprPlan4.getSinks().get(0);
        assertEquals( load2Schema.getField(1).uid, prj4.getUid() );
        assertEquals( 1, prj4.getColNum() );
        assertEquals( 1, prj4.getInputNum() );
    }
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        LOInnerLoad innerLoad2 = new LOInnerLoad(innerPlan, foreach, 1);
        innerPlan.add(innerLoad2);
       
        LogicalExpressionPlan namePrj = new LogicalExpressionPlan();       
        ProjectExpression prjName = new ProjectExpression(namePrj, DataType.CHARARRAY, 0, 0);
        namePrj.add(prjName);
       
        LogicalExpressionPlan cuisinesPrj = new LogicalExpressionPlan();
        ProjectExpression prjCuisines = new ProjectExpression(cuisinesPrj, DataType.BAG, 1, 0);
        cuisinesPrj.add(prjCuisines);
       
        List<LogicalExpressionPlan> expPlans = new ArrayList<LogicalExpressionPlan>();
        expPlans.add(namePrj);
        expPlans.add(cuisinesPrj);
       
        boolean flatten[] = new boolean[2];
        flatten[0] = false;
        flatten[1] = true;
       
        LOGenerate generate = new LOGenerate(innerPlan, expPlans, flatten);       
        innerPlan.add(generate);
        innerPlan.connect(innerLoad, generate);
        innerPlan.connect(innerLoad2, generate);
       
        foreach.setInnerPlan(innerPlan);
        foreach.setAlias("B");
        plan.add(foreach);
       
        plan.connect(load, foreach);
       
        filter = new LOFilter(plan);
        LogicalExpressionPlan filterPlan = new LogicalExpressionPlan();
        ProjectExpression namePrj2 = new ProjectExpression(filterPlan, DataType.CHARARRAY, 0, 0);
        filterPlan.add(namePrj2);
        ConstantExpression constExp = new ConstantExpression(filterPlan, DataType.CHARARRAY, "joe");
        filterPlan.add(constExp);
        EqualExpression equal = new EqualExpression(filterPlan, namePrj2, constExp);
        filterPlan.add(equal);
       
        filter.setFilterPlan(filterPlan);
        filter.setAlias("C");
        plan.add(filter);
       
        plan.connect(foreach, filter);
       
        stor = new LOStore(plan);
        stor.setAlias("D");
        plan.add(stor);
        plan.connect(filter,stor);
       
        try {
            // Stamp everything with a Uid
            UidStamper stamper = new UidStamper(plan);
            stamper.visit();
        }catch(Exception e) {
            assertTrue("Failed to set a valid uid", false );
        }
       
        // run filter rule
        Rule r = new FilterAboveForeach("FilterAboveFlatten");
        Set<Rule> s = new HashSet<Rule>();
        s.add(r);
        List<Set<Rule>> ls = new ArrayList<Set<Rule>>();
        ls.add(s);
       
        // Test Plan before optimizing
        List<Operator> list = plan.getSinks();
        assertTrue( list.contains(stor) );
       
        list = plan.getSources();
        assertTrue( list.contains(load) );
       
        assertTrue( plan.getPredecessors(stor).contains(filter) );
        assertEquals( 1, plan.getPredecessors(stor).size() );
       
        assertTrue( plan.getPredecessors(filter).contains(foreach) );
        assertEquals( 1, plan.getPredecessors(filter).size() );
       
        assertTrue( foreach.getInnerPlan().getSinks().contains(generate) );
        assertEquals( 1, foreach.getInnerPlan().getSinks().size() );
        assertTrue( foreach.getInnerPlan().getSources().contains(innerLoad) );
        assertTrue( foreach.getInnerPlan().getSources().contains(innerLoad2) );
        assertEquals( 2, foreach.getInnerPlan().getSources().size() );
       
        // Run the optimizer
        MyPlanOptimizer optimizer = new MyPlanOptimizer(plan, ls, 3);
        optimizer.addPlanTransformListener(new ProjectionPatcher());
        optimizer.addPlanTransformListener(new SchemaPatcher());
        optimizer.optimize();
       
        // Test after optimization
        list = plan.getSinks();
        assertTrue( list.contains(stor) );
       
        list = plan.getSources();
        assertTrue( list.contains(load) );
       
        assertTrue( plan.getPredecessors(stor).contains(foreach) );
        assertEquals( 1, plan.getPredecessors(stor).size() );
       
        assertTrue( plan.getPredecessors(filter).contains(load) );
        assertEquals( 1, plan.getPredecessors(filter).size() );
        assertEquals( load.getSchema().getField(0).uid, namePrj2.getUid() );
        assertEquals( namePrj2.getUid(), prjName.getUid() );
       
        assertTrue( plan.getPredecessors(foreach).contains(filter) );
        assertEquals( 1, plan.getPredecessors(foreach).size() );
       
        assertTrue( foreach.getInnerPlan().getSinks().contains(generate) );
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        LOInnerLoad innerLoad2 = new LOInnerLoad(innerPlan, foreach, 1);
        innerPlan.add(innerLoad2);
       
        LogicalExpressionPlan namePrj = new LogicalExpressionPlan();       
        ProjectExpression prjName = new ProjectExpression(namePrj, DataType.CHARARRAY, 0, 0);
        namePrj.add(prjName);
       
        LogicalExpressionPlan cuisinesPrj = new LogicalExpressionPlan();
        ProjectExpression prjCuisines = new ProjectExpression(cuisinesPrj, DataType.BAG, 1, 0);
        cuisinesPrj.add(prjCuisines);
       
        List<LogicalExpressionPlan> expPlans = new ArrayList<LogicalExpressionPlan>();
        expPlans.add(namePrj);
        expPlans.add(cuisinesPrj);
       
        boolean flatten[] = new boolean[2];
        flatten[0] = false;
        flatten[1] = true;
       
        LOGenerate generate = new LOGenerate(innerPlan, expPlans, flatten);       
        innerPlan.add(generate);
        innerPlan.connect(innerLoad, generate);
        innerPlan.connect(innerLoad2, generate);
       
        foreach.setInnerPlan(innerPlan);
        foreach.setAlias("B");
        plan.add(foreach);
       
        plan.connect(load, foreach);
       
        filter = new LOFilter(plan);
        LogicalExpressionPlan filterPlan = new LogicalExpressionPlan();
        ProjectExpression namePrj2 = new ProjectExpression(filterPlan, DataType.CHARARRAY, 0, 0);
        filterPlan.add(namePrj2);
        ConstantExpression constExp = new ConstantExpression(filterPlan, DataType.CHARARRAY, "joe");
        filterPlan.add(constExp);
        EqualExpression equal = new EqualExpression(filterPlan, namePrj2, constExp);
        filterPlan.add(equal);
       
        filter.setFilterPlan(filterPlan);
        filter.setAlias("C");
        plan.add(filter);
       
        LOFilter filter2 = new LOFilter(plan);
        LogicalExpressionPlan filter2Plan = new LogicalExpressionPlan();
        ProjectExpression name2Prj2 = new ProjectExpression(filter2Plan, DataType.CHARARRAY, 0, 1);
        filter2Plan.add(name2Prj2);
        ConstantExpression const2Exp = new ConstantExpression(filter2Plan, DataType.CHARARRAY, "joe");
        filter2Plan.add(const2Exp);
        EqualExpression equal2 = new EqualExpression(filter2Plan, namePrj2, constExp);
        filter2Plan.add(equal2);
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        LOInnerLoad innerLoad2 = new LOInnerLoad(innerPlan, foreach, 1);
        innerPlan.add(innerLoad2);
       
        LogicalExpressionPlan namePrj = new LogicalExpressionPlan();       
        ProjectExpression prjName = new ProjectExpression(namePrj, DataType.CHARARRAY, 0, 0);
        namePrj.add(prjName);
       
        LogicalExpressionPlan cuisinesPrj = new LogicalExpressionPlan();
        ProjectExpression prjCuisines = new ProjectExpression(cuisinesPrj, DataType.BAG, 1, 0);
        cuisinesPrj.add(prjCuisines);
       
        List<LogicalExpressionPlan> expPlans = new ArrayList<LogicalExpressionPlan>();
        expPlans.add(namePrj);
        expPlans.add(cuisinesPrj);
       
        boolean flatten[] = new boolean[2];
        flatten[0] = false;
        flatten[1] = true;
       
        LOGenerate generate = new LOGenerate(innerPlan, expPlans, flatten);       
        innerPlan.add(generate);
        innerPlan.connect(innerLoad, generate);
        innerPlan.connect(innerLoad2, generate);
       
        foreach.setInnerPlan(innerPlan);
        foreach.setAlias("B");
        plan.add(foreach);
       
        plan.connect(load, foreach);
       
        filter = new LOFilter(plan);
        LogicalExpressionPlan filterPlan = new LogicalExpressionPlan();
        ProjectExpression namePrj2 = new ProjectExpression(filterPlan, DataType.CHARARRAY, 0, 0);
        filterPlan.add(namePrj2);
        ConstantExpression constExp = new ConstantExpression(filterPlan, DataType.CHARARRAY, "joe");
        filterPlan.add(constExp);
        EqualExpression equal = new EqualExpression(filterPlan, namePrj2, constExp);
        filterPlan.add(equal);
       
        filter.setFilterPlan(filterPlan);
        filter.setAlias("C");
        plan.add(filter);
       
        LOFilter filter2 = new LOFilter(plan);
        LogicalExpressionPlan filter2Plan = new LogicalExpressionPlan();
        ProjectExpression name2Prj2 = new ProjectExpression(filter2Plan, DataType.CHARARRAY, 0, 0);
        filter2Plan.add(name2Prj2);
        ConstantExpression const2Exp = new ConstantExpression(filter2Plan, DataType.CHARARRAY, "joe2");
        filter2Plan.add(const2Exp);
        EqualExpression equal2 = new EqualExpression(filter2Plan, namePrj2, constExp);
        filter2Plan.add(equal2);
       
        filter2.setFilterPlan(filter2Plan);
        filter2.setAlias("C1");
        plan.add(filter2);
       
        plan.connect(foreach, filter2);
        plan.connect(filter2, filter);
       
        stor = new LOStore(plan);
        stor.setAlias("D");
        plan.add(stor);
        plan.connect(filter,stor);
       
        try {
            // Stamp everything with a Uid
            UidStamper stamper = new UidStamper(plan);
            stamper.visit();
        }catch(Exception e) {
            assertTrue("Failed to set a valid uid", false );
        }
       
       
        // run filter rule
        Rule r = new FilterAboveForeach("FilterAboveFlatten");
        Set<Rule> s = new HashSet<Rule>();
        s.add(r);
        List<Set<Rule>> ls = new ArrayList<Set<Rule>>();
        ls.add(s);
       
        // Test Plan before optimizing
        List<Operator> list = plan.getSinks();
        assertTrue( list.contains(stor) );
       
        list = plan.getSources();
        assertTrue( list.contains(load) );
       
        assertTrue( plan.getPredecessors(stor).contains(filter) );
        assertEquals( 1, plan.getPredecessors(stor).size() );
       
        assertTrue( plan.getPredecessors(filter2).contains(foreach) );
        assertEquals( 1, plan.getPredecessors(filter2).size() );
       
        assertTrue( plan.getPredecessors(foreach).contains(load) );
        assertEquals( 1, plan.getPredecessors(foreach).size() );
       
        assertTrue( plan.getPredecessors(filter).contains(filter2) );
        assertEquals( 1, plan.getPredecessors(filter).size() );
       
        assertTrue( foreach.getInnerPlan().getSinks().contains(generate) );
        assertEquals( 1, foreach.getInnerPlan().getSinks().size() );
        assertTrue( foreach.getInnerPlan().getSources().contains(innerLoad) );
        assertTrue( foreach.getInnerPlan().getSources().contains(innerLoad2) );
        assertEquals( 2, foreach.getInnerPlan().getSources().size() );
       
        // Run the optimizer
        MyPlanOptimizer optimizer = new MyPlanOptimizer(plan, ls, 3);
        optimizer.addPlanTransformListener(new ProjectionPatcher());
        optimizer.addPlanTransformListener(new SchemaPatcher());
        optimizer.optimize();
       
        // Test after optimization
        list = plan.getSinks();
        assertTrue( list.contains(stor) );
       
        list = plan.getSources();
        assertTrue( list.contains(load) );
       
        assertTrue( plan.getPredecessors(stor).contains(foreach) );
        assertEquals( 1, plan.getPredecessors(stor).size() );
       
        assertTrue( plan.getPredecessors(filter2).contains(load) );
        assertEquals( 1, plan.getPredecessors(filter2).size() );
       
        assertTrue( plan.getPredecessors(foreach).contains(filter) );
        assertEquals( 1, plan.getPredecessors(foreach).size() );
       
        assertTrue( plan.getPredecessors(filter).contains(filter2) );
        assertEquals( 1, plan.getPredecessors(filter).size() );
       
        assertEquals( load.getSchema().getField(0).uid, namePrj2.getUid() );
        assertEquals( namePrj2.getUid(), name2Prj2.getUid() );
        assertEquals( name2Prj2.getUid(), prjName.getUid() );
       
        assertTrue( foreach.getInnerPlan().getSinks().contains(generate) );
        assertEquals( 1, foreach.getInnerPlan().getSinks().size() );
        assertTrue( foreach.getInnerPlan().getSources().contains(innerLoad) );
        assertTrue( foreach.getInnerPlan().getSources().contains(innerLoad2) );
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        LOInnerLoad innerLoad2 = new LOInnerLoad(innerPlan, foreach, 1);
        innerPlan.add(innerLoad2);
       
        LogicalExpressionPlan namePrj = new LogicalExpressionPlan();       
        ProjectExpression prjName = new ProjectExpression(namePrj, DataType.CHARARRAY, 0, 0);
        namePrj.add(prjName);
       
        LogicalExpressionPlan cuisinesPrj = new LogicalExpressionPlan();
        ProjectExpression prjCuisines = new ProjectExpression(cuisinesPrj, DataType.BAG, 1, 0);
        cuisinesPrj.add(prjCuisines);
       
        List<LogicalExpressionPlan> expPlans = new ArrayList<LogicalExpressionPlan>();
        expPlans.add(namePrj);
        expPlans.add(cuisinesPrj);
       
        boolean flatten[] = new boolean[2];
        flatten[0] = false;
        flatten[1] = true;
       
        LOGenerate generate = new LOGenerate(innerPlan, expPlans, flatten);       
        innerPlan.add(generate);
        innerPlan.connect(innerLoad, generate);
        innerPlan.connect(innerLoad2, generate);
       
        foreach.setInnerPlan(innerPlan);
        foreach.setAlias("B");
        plan.add(foreach);
       
        plan.connect(load, foreach);
       
        filter = new LOFilter(plan);
        LogicalExpressionPlan filterPlan = new LogicalExpressionPlan();
        ProjectExpression namePrj2 = new ProjectExpression(filterPlan, DataType.CHARARRAY, 0, 1);
        filterPlan.add(namePrj2);
        ConstantExpression constExp = new ConstantExpression(filterPlan, DataType.CHARARRAY, "joe");
        filterPlan.add(constExp);
        EqualExpression equal = new EqualExpression(filterPlan, namePrj2, constExp);
        filterPlan.add(equal);
       
        filter.setFilterPlan(filterPlan);
        filter.setAlias("C");
        plan.add(filter);
       
        LOFilter filter2 = new LOFilter(plan);
        LogicalExpressionPlan filter2Plan = new LogicalExpressionPlan();
        ProjectExpression name2Prj2 = new ProjectExpression(filter2Plan, DataType.CHARARRAY, 0, 1);
        filter2Plan.add(name2Prj2);
        ConstantExpression const2Exp = new ConstantExpression(filter2Plan, DataType.CHARARRAY, "joe2");
        filter2Plan.add(const2Exp);
        EqualExpression equal2 = new EqualExpression(filter2Plan, namePrj2, constExp);
        filter2Plan.add(equal2);
       
        filter2.setFilterPlan(filter2Plan);
        filter2.setAlias("C1");
        plan.add(filter2);
       
        plan.connect(foreach, filter2);
        plan.connect(filter2, filter);
       
        stor = new LOStore(plan);
        stor.setAlias("D");
        plan.add(stor);
        plan.connect(filter,stor);
       
        try {
            // Stamp everything with a Uid
            UidStamper stamper = new UidStamper(plan);
            stamper.visit();
        }catch(Exception e) {
            assertTrue("Failed to set a valid uid", false );
        }
       
       
        // run filter rule
        Rule r = new FilterAboveForeach("FilterAboveFlatten");
        Set<Rule> s = new HashSet<Rule>();
        s.add(r);
        List<Set<Rule>> ls = new ArrayList<Set<Rule>>();
        ls.add(s);
       
        // Test Plan before optimizing
        List<Operator> list = plan.getSinks();
        assertTrue( list.contains(stor) );
       
        list = plan.getSources();
        assertTrue( list.contains(load) );
       
        assertTrue( plan.getPredecessors(stor).contains(filter) );
        assertEquals( 1, plan.getPredecessors(stor).size() );
       
        assertTrue( plan.getPredecessors(filter2).contains(foreach) );
        assertEquals( 1, plan.getPredecessors(filter2).size() );
       
        assertTrue( plan.getPredecessors(foreach).contains(load) );
        assertEquals( 1, plan.getPredecessors(foreach).size() );
       
        assertTrue( plan.getPredecessors(filter).contains(filter2) );
        assertEquals( 1, plan.getPredecessors(filter).size() );
       
        assertTrue( foreach.getInnerPlan().getSinks().contains(generate) );
        assertEquals( 1, foreach.getInnerPlan().getSinks().size() );
        assertTrue( foreach.getInnerPlan().getSources().contains(innerLoad) );
        assertTrue( foreach.getInnerPlan().getSources().contains(innerLoad2) );
        assertEquals( 2, foreach.getInnerPlan().getSources().size() );
       
        // Run the optimizer
        MyPlanOptimizer optimizer = new MyPlanOptimizer(plan, ls, 3);
        optimizer.addPlanTransformListener(new ProjectionPatcher());
        optimizer.addPlanTransformListener(new SchemaPatcher());
        optimizer.optimize();
       
        // Test after optimization
        list = plan.getSinks();
        assertTrue( list.contains(stor) );
       
        list = plan.getSources();
        assertTrue( list.contains(load) );
       
        assertTrue( plan.getPredecessors(stor).contains(filter) );
        assertEquals( 1, plan.getPredecessors(stor).size() );
       
        assertTrue( plan.getPredecessors(filter2).contains(foreach) );
        assertEquals( 1, plan.getPredecessors(filter2).size() );
       
        assertTrue( plan.getPredecessors(foreach).contains(load) );
        assertEquals( 1, plan.getPredecessors(foreach).size() );
       
        assertFalse( prjCuisines.getUid() == namePrj2.getUid() );
        assertFalse( prjCuisines.getUid() == name2Prj2.getUid() );
       
        assertTrue( plan.getPredecessors(filter).contains(filter2) );
        assertEquals( 1, plan.getPredecessors(filter).size() );
       
        assertTrue( foreach.getInnerPlan().getSinks().contains(generate) );
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