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

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

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

org.apache.pig.newplan.logical.expression.ConstantExpression
A constant

            LogicalExpressionPlan exprPlan)
            throws ParserValidationException {
        try {
            filterOp.setAlias(inputAlias);
            List<LogicalExpression> args = new ArrayList<LogicalExpression>();
            ConstantExpression lhs = new ConstantExpression(exprPlan, new Boolean(true));
            ConstantExpression rhs = new ConstantExpression(exprPlan, new Boolean(false));
            BinCondExpression binCond = new BinCondExpression(exprPlan, expr, lhs, rhs);
            args.add(binCond);
            ConstantExpression constExpr = new ConstantExpression(exprPlan, (comment == null ? "" : comment));
            args.add(constExpr);
            UserFuncExpression udf = new UserFuncExpression(exprPlan, new FuncSpec( Assert.class.getName() ), args );
            exprPlan.add(udf);
            filterOp.setFilterPlan(exprPlan);
            // pass the inputAlias to alias

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    {
        if(op == null) {
            return null;
        }
        if(op instanceof ConstantExpression) {
            ConstantExpression constExpr =(ConstantExpression)op ;
            return new Expression.Const( constExpr.getValue() );
        } else if (op instanceof ProjectExpression) {
            ProjectExpression projExpr = (ProjectExpression)op;
            String fieldName = projExpr.getFieldSchema().alias;
            return new Expression.Column(fieldName);
        } else {

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    }


    @Test
    public void testBinaryOperatorOrder() throws FrontendException {
        LogicalExpressionPlan ep = new LogicalExpressionPlan();
        ConstantExpression c = new ConstantExpression(ep, new Integer(5));
        ProjectExpression p = new ProjectExpression(ep, 0, 0, null);
        EqualExpression e = new EqualExpression(ep, p, c);
        assertEquals(p, e.getLhs());
        assertEquals(c, e.getRhs());
    }

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    }


    @Test
    public void testExpressionPlanVisitor() throws FrontendException {
        LogicalExpressionPlan ep = new LogicalExpressionPlan();
        ConstantExpression c = new ConstantExpression(ep, new Integer(5));
        ProjectExpression p = new ProjectExpression(ep, 0, 0, null);
        EqualExpression e = new EqualExpression(ep, p, c);
        ConstantExpression c2 = new ConstantExpression(ep, new Boolean("true"));
        new AndExpression(ep, e, c2);


        TestExpressionVisitor v = new TestExpressionVisitor(ep);
        v.visit();
        assertEquals("and equal project constant constant ", v.getVisitPlan());

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    }


    @Test
    public void testExpressionEquality() throws FrontendException {
        LogicalExpressionPlan ep1 = new LogicalExpressionPlan();
        ConstantExpression c1 = new ConstantExpression(ep1, new Integer(5));
        ProjectExpression p1 = new ProjectExpression(ep1, 0, 0, null);
        EqualExpression e1 = new EqualExpression(ep1, p1, c1);
        ConstantExpression ca1 = new ConstantExpression(ep1, new Boolean("true"));
        AndExpression a1 = new AndExpression(ep1, e1, ca1);


        LogicalExpressionPlan ep2 = new LogicalExpressionPlan();
        ConstantExpression c2 = new ConstantExpression(ep2, new Integer(5));
        ProjectExpression p2 = new ProjectExpression(ep2, 0, 0, null);
        EqualExpression e2 = new EqualExpression(ep2, p2, c2);
        ConstantExpression ca2 = new ConstantExpression(ep2, new Boolean("true"));
        AndExpression a2 = new AndExpression(ep2, e2, ca2);


        assertTrue(ep1.isEqual(ep2));
        assertTrue(c1.isEqual(c2));
        assertTrue(p1.isEqual(p2));
        assertTrue(e1.isEqual(e2));
        assertTrue(ca1.isEqual(ca2));
        assertTrue(a1.isEqual(a2));


        LogicalExpressionPlan ep3 = new LogicalExpressionPlan();
        ConstantExpression c3 = new ConstantExpression(ep3, new Integer(3));
        ProjectExpression p3 = new ProjectExpression(ep3, 0, 1, null);
        EqualExpression e3 = new EqualExpression(ep3, p3, c3);
        ConstantExpression ca3 = new ConstantExpression(ep3, "true");
        AndExpression a3 = new AndExpression(ep3, e3, ca3);


        assertFalse(ep1.isEqual(ep3));
        assertFalse(c1.isEqual(c3));
        assertFalse(p1.isEqual(p3));

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            lp.connect(B, C);


            // D = filter
            LogicalExpressionPlan filterPlan = new LogicalExpressionPlan();
            ProjectExpression fy = new ProjectExpression(filterPlan, 0, 1, null);
            ConstantExpression fc = new ConstantExpression(filterPlan, new Integer(0));
            new EqualExpression(filterPlan, fy, fc);
            LOFilter D = new LOFilter(lp, filterPlan);
            D.neverUseForRealSetSchema(cschema);
            lp.add(D);
            lp.connect(C, D);
        }


        // Build a second similar plan to test equality
        // A = load
        LogicalPlan lp1 = new LogicalPlan();
        {
            LogicalSchema aschema = new LogicalSchema();
            aschema.addField(new LogicalSchema.LogicalFieldSchema(
                    "x", null, DataType.INTEGER));
            LOLoad A = newLOLoad(new FileSpec("/abc",
                    new FuncSpec(DummyLoad.class.getName(), new String[] { "x", "y" })), aschema,
                    lp1, conf);
            lp1.add(A);


            // B = load
            LogicalSchema bschema = new LogicalSchema();
            bschema.addField(new LogicalSchema.LogicalFieldSchema(
                    "y", null, DataType.INTEGER));
            LOLoad B = newLOLoad(new FileSpec("/def",
                    new FuncSpec("PigStorage", "\t")), bschema, lp1, conf);
            lp1.add(B);


            // C = join
            LogicalSchema cschema = new LogicalSchema();
            cschema.addField(new LogicalSchema.LogicalFieldSchema(
                    "x", null, DataType.INTEGER));
            cschema.addField(new LogicalSchema.LogicalFieldSchema(
                    "y", null, DataType.INTEGER));
            LogicalExpressionPlan aprojplan = new LogicalExpressionPlan();
            new ProjectExpression(aprojplan, 0, 0, null);
            LogicalExpressionPlan bprojplan = new LogicalExpressionPlan();
            new ProjectExpression(bprojplan, 1, 0, null);
            MultiMap<Integer, LogicalExpressionPlan> mm =
                    new MultiMap<Integer, LogicalExpressionPlan>();
            mm.put(0, aprojplan);
            mm.put(1, bprojplan);
            LOJoin C = new LOJoin(lp1, mm, JOINTYPE.HASH, new boolean[] { true, true });
            C.neverUseForRealSetSchema(cschema);
            lp1.add(C);
            lp1.connect(A, C);
            lp1.connect(B, C);


            // D = filter
            LogicalExpressionPlan filterPlan = new LogicalExpressionPlan();
            ProjectExpression fy = new ProjectExpression(filterPlan, 0, 1, null);
            ConstantExpression fc = new ConstantExpression(filterPlan, new Integer(0));
            new EqualExpression(filterPlan, fy, fc);
            LOFilter D = new LOFilter(lp1, filterPlan);
            D.neverUseForRealSetSchema(cschema);
            lp1.add(D);
            lp1.connect(C, D);

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    public void testFilterDifferentPredicates() throws FrontendException {
        LogicalPlan lp = new LogicalPlan();


        LogicalExpressionPlan fp1 = new LogicalExpressionPlan();
        ProjectExpression fy1 = new ProjectExpression(fp1, 0, 1, null);
        ConstantExpression fc1 = new ConstantExpression(fp1,
                new Integer(0));
        new EqualExpression(fp1, fy1, fc1);
        LOFilter D1 = new LOFilter(lp, fp1);
        LogicalSchema cschema = new LogicalSchema();
        cschema.addField(new LogicalSchema.LogicalFieldSchema(
                "x", null, DataType.INTEGER));
        cschema.addField(new LogicalSchema.LogicalFieldSchema(
                "y", null, DataType.INTEGER));
        D1.neverUseForRealSetSchema(cschema);
        lp.add(D1);


        LogicalExpressionPlan fp2 = new LogicalExpressionPlan();
        ProjectExpression fy2 = new ProjectExpression(fp2, 0, 1, null);
        ConstantExpression fc2 = new ConstantExpression(fp2,
                new Integer(1));
        new EqualExpression(fp2, fy2, fc2);
        LOFilter D2 = new LOFilter(lp, fp2);
        D2.neverUseForRealSetSchema(cschema);
        lp.add(D2);

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                conf);
        lp1.add(A1);


        LogicalExpressionPlan fp1 = new LogicalExpressionPlan();
        ProjectExpression fy1 = new ProjectExpression(fp1, 0, 0, null);
        ConstantExpression fc1 = new ConstantExpression(fp1,
                new Integer(0));
        new EqualExpression(fp1, fy1, fc1);
        LOFilter D1 = new LOFilter(lp1, fp1);
        LogicalSchema cschema = new LogicalSchema();
        cschema.addField(new LogicalSchema.LogicalFieldSchema(
                "x", null, DataType.INTEGER));
        D1.neverUseForRealSetSchema(cschema);
        lp1.add(D1);
        lp1.connect(A1, D1);


        LogicalPlan lp2 = new LogicalPlan();
        LOLoad A2 = newLOLoad(new FileSpec("/abc",
                new FuncSpec(DummyLoad.class.getName(), new String[] { "x", "z" })), null, lp2,
                conf);
        lp2.add(A2);


        LogicalExpressionPlan fp2 = new LogicalExpressionPlan();
        ProjectExpression fy2 = new ProjectExpression(fp2, 0, 0, null);
        ConstantExpression fc2 = new ConstantExpression(fp2,
                new Integer(0));
        new EqualExpression(fp2, fy2, fc2);
        LOFilter D2 = new LOFilter(lp2, fp2);
        D2.neverUseForRealSetSchema(cschema);
        lp2.add(D2);

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        // build an expression with no AND
        LogicalExpressionPlan p3 = new LogicalExpressionPlan();
        LogicalRelationalOperator f1 = new LOFilter(plan, p3);
        
        LogicalExpression lp3 = new ProjectExpression(p3, 0, 2, f1);
        LogicalExpression cont = new ConstantExpression(p3, new Integer(3));
        p3.add(lp3);
        p3.add(cont);       
        LogicalExpression eq = new EqualExpression(p3, lp3, cont);

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    public void testFilterRuleWithAnd() throws Exception  {
        prep();
        
        LogicalExpressionPlan p4 = new LogicalExpressionPlan();        
        LogicalExpression lp3 = new ProjectExpression(p4, 0, 2, filter);
        LogicalExpression cont = new ConstantExpression(p4, new Integer(3));
        p4.add(lp3);
        p4.add(cont);
        LogicalExpression eq = new EqualExpression(p4, lp3, cont);
      
        LogicalExpression lp4 = new ProjectExpression(p4, 0, 5, filter);
        LogicalExpression cont2 = new ConstantExpression(p4, new Float(100));
        p4.add(lp4);
        p4.add(cont2);
        LogicalExpression eq2 = new EqualExpression(p4, lp4, cont2);        
    
        LogicalExpression and = new AndExpression(p4, eq, eq2);

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