Package org.voltdb.expressions

Examples of org.voltdb.expressions.AbstractExpression

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    public void testScanJoinConditions() {
        AbstractPlanNode pn = compile("select * FROM R1 WHERE R1.C = 0");
        AbstractPlanNode n = pn.getChild(0);
        assertTrue(n instanceof AbstractScanPlanNode);
        AbstractScanPlanNode scan = (AbstractScanPlanNode) n;
        AbstractExpression p = scan.getPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());

        pn = compile("select * FROM R1, R2 WHERE R1.A = R2.A AND R1.C > 0");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) n).getJoinPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        n = n.getChild(0);
        assertTrue(n instanceof AbstractScanPlanNode);
        assertTrue(((AbstractScanPlanNode) n).getTargetTableName().equalsIgnoreCase("R1"));
        p = ((AbstractScanPlanNode) n).getPredicate();
        assertEquals(ExpressionType.COMPARE_GREATERTHAN, p.getExpressionType());

        pn = compile("select * FROM R1, R2 WHERE R1.A = R2.A AND R1.C > R2.C");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) n).getJoinPredicate();
        assertEquals(ExpressionType.CONJUNCTION_AND, p.getExpressionType());
        if (p.getLeft().getExpressionType() == ExpressionType.COMPARE_EQUAL) {
            assertEquals(ExpressionType.COMPARE_EQUAL, p.getLeft().getExpressionType());
            assertEquals(ExpressionType.COMPARE_LESSTHAN, p.getRight().getExpressionType());
        } else {
            assertEquals(ExpressionType.COMPARE_LESSTHAN, p.getLeft().getExpressionType());
            assertEquals(ExpressionType.COMPARE_EQUAL, p.getRight().getExpressionType());
        }
        assertNull(((AbstractScanPlanNode)n.getChild(0)).getPredicate());
        assertNull(((AbstractScanPlanNode)n.getChild(1)).getPredicate());

        pn = compile("select * FROM R1 JOIN R2 ON R1.A = R2.A WHERE R1.C > 0");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) n).getJoinPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        n = n.getChild(0);
        assertTrue(n instanceof AbstractScanPlanNode);
        assertTrue("R1".equalsIgnoreCase(((AbstractScanPlanNode) n).getTargetTableName()));
        p = ((AbstractScanPlanNode) n).getPredicate();
        assertEquals(ExpressionType.COMPARE_GREATERTHAN, p.getExpressionType());

        pn = compile("select * FROM R1 JOIN R2 ON R1.A = R2.A WHERE R1.C > R2.C");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) n).getJoinPredicate();
        assertEquals(ExpressionType.CONJUNCTION_AND, p.getExpressionType());
        if (ExpressionType.COMPARE_EQUAL == p.getLeft().getExpressionType()) {
            assertEquals(ExpressionType.COMPARE_EQUAL, p.getLeft().getExpressionType());
            assertEquals(ExpressionType.COMPARE_LESSTHAN, p.getRight().getExpressionType());
        } else {
            assertEquals(ExpressionType.COMPARE_LESSTHAN, p.getLeft().getExpressionType());
            assertEquals(ExpressionType.COMPARE_EQUAL, p.getRight().getExpressionType());
        }
        assertNull(((AbstractScanPlanNode)n.getChild(0)).getPredicate());
        assertNull(((AbstractScanPlanNode)n.getChild(1)).getPredicate());

        pn = compile("select * FROM R1, R2, R3 WHERE R1.A = R2.A AND R1.C = R3.C AND R1.A > 0");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) n).getJoinPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        AbstractPlanNode c = n.getChild(0);
        assertTrue(c instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) c).getJoinPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        c = c.getChild(0);
        assertTrue(c instanceof AbstractScanPlanNode);
        p = ((AbstractScanPlanNode) c).getPredicate();
        assertEquals(ExpressionType.COMPARE_GREATERTHAN, p.getExpressionType());
        c = n.getChild(1);
        assertTrue("R3".equalsIgnoreCase(((AbstractScanPlanNode) c).getTargetTableName()));
        assertEquals(null, ((AbstractScanPlanNode) c).getPredicate());

        pn = compile("select * FROM R1 JOIN R2 on R1.A = R2.A AND R1.C = R2.C where R1.A > 0");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) n).getJoinPredicate();
        assertEquals(ExpressionType.CONJUNCTION_AND, p.getExpressionType());
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getLeft().getExpressionType());
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getRight().getExpressionType());
        n = n.getChild(0);
        assertTrue(n instanceof AbstractScanPlanNode);
        assertTrue("R1".equalsIgnoreCase(((AbstractScanPlanNode) n).getTargetTableName()));
        p = ((AbstractScanPlanNode) n).getPredicate();
        assertEquals(ExpressionType.COMPARE_GREATERTHAN, p.getExpressionType());

        pn = compile("select A,C FROM R1 JOIN R2 USING (A, C)");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) n).getJoinPredicate();
        assertEquals(ExpressionType.CONJUNCTION_AND, p.getExpressionType());
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getLeft().getExpressionType());
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getRight().getExpressionType());

        pn = compile("select A,C FROM R1 JOIN R2 USING (A, C) WHERE A > 0");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) n).getJoinPredicate();
        assertEquals(ExpressionType.CONJUNCTION_AND, p.getExpressionType());
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getLeft().getExpressionType());
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getRight().getExpressionType());
        n = n.getChild(1);
        assertTrue(n instanceof AbstractScanPlanNode);
        scan = (AbstractScanPlanNode) n;
        assertTrue(scan.getPredicate() != null);
        assertEquals(ExpressionType.COMPARE_GREATERTHAN, scan.getPredicate().getExpressionType());

        pn = compile("select * FROM R1 JOIN R2 ON R1.A = R2.A JOIN R3 ON R1.C = R3.C WHERE R1.A > 0");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopPlanNode);
        p = ((NestLoopPlanNode) n).getJoinPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        n = n.getChild(0);
        assertTrue(n instanceof NestLoopPlanNode);
        NestLoopPlanNode nlj = (NestLoopPlanNode) n;
        assertEquals(ExpressionType.COMPARE_EQUAL, nlj.getJoinPredicate().getExpressionType());
        n = n.getChild(0);
        assertTrue(n instanceof AbstractScanPlanNode);
        assertTrue(((AbstractScanPlanNode) n).getTargetTableName().equalsIgnoreCase("R1"));
        p = ((AbstractScanPlanNode) n).getPredicate();
        assertEquals(ExpressionType.COMPARE_GREATERTHAN, p.getExpressionType());
    }
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        pn = pn.getChild(0);
        assertNotNull(AggregatePlanNode.getInlineAggregationNode(pn));
        assertTrue(pn instanceof NestLoopPlanNode);
        NodeSchema ns = pn.getOutputSchema();
        for (SchemaColumn sc : ns.getColumns()) {
            AbstractExpression e = sc.getExpression();
            assertTrue(e instanceof TupleValueExpression);
            TupleValueExpression tve = (TupleValueExpression) e;
            assertNotSame(-1, tve.getColumnIndex());
        }

        pn = compile("select  distinct(A) FROM R1 JOIN R2 USING(A)");
        pn = pn.getChild(0);
        assertTrue(pn instanceof ProjectionPlanNode);
        ns = pn.getOutputSchema();
        for (SchemaColumn sc : ns.getColumns()) {
            AbstractExpression e = sc.getExpression();
            assertTrue(e instanceof TupleValueExpression);
            TupleValueExpression tve = (TupleValueExpression) e;
            assertNotSame(-1, tve.getColumnIndex());
        }
        pn = pn.getChild(0);
        assertTrue(pn instanceof DistinctPlanNode);
        ns = pn.getOutputSchema();
        for (SchemaColumn sc : ns.getColumns()) {
            AbstractExpression e = sc.getExpression();
            assertTrue(e instanceof TupleValueExpression);
            TupleValueExpression tve = (TupleValueExpression) e;
            assertNotSame(-1, tve.getColumnIndex());
        }

        pn = compile("select  A  FROM R1 JOIN R2 USING(A) ORDER BY A");
        pn = pn.getChild(0);
        assertTrue(pn instanceof ProjectionPlanNode);
        ns = pn.getOutputSchema();
        for (SchemaColumn sc : ns.getColumns()) {
            AbstractExpression e = sc.getExpression();
            assertTrue(e instanceof TupleValueExpression);
            TupleValueExpression tve = (TupleValueExpression) e;
            assertNotSame(-1, tve.getColumnIndex());
        }
        pn = pn.getChild(0);
        assertTrue(pn instanceof OrderByPlanNode);
        ns = pn.getOutputSchema();
        for (SchemaColumn sc : ns.getColumns()) {
            AbstractExpression e = sc.getExpression();
            assertTrue(e instanceof TupleValueExpression);
            TupleValueExpression tve = (TupleValueExpression) e;
            assertNotSame(-1, tve.getColumnIndex());
        }
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        AbstractPlanNode pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.A = R2.A AND R2.A = 1 ");
        AbstractPlanNode n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        AbstractJoinPlanNode jn = (AbstractJoinPlanNode) n;
        assertNull(jn.getJoinPredicate());
        AbstractExpression p = jn.getPreJoinPredicate();
        assertNotNull(p);
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        assertEquals(ExpressionType.VALUE_CONSTANT, p.getLeft().getExpressionType());
        assertEquals(ExpressionType.VALUE_TUPLE, p.getRight().getExpressionType());
        assertTrue(jn.getChild(1) instanceof SeqScanPlanNode);
        SeqScanPlanNode ssn = (SeqScanPlanNode)jn.getChild(1);
        assertNotNull(ssn.getPredicate());
        p = ssn.getPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        assertEquals(ExpressionType.VALUE_TUPLE, p.getLeft().getExpressionType());
        assertEquals(ExpressionType.VALUE_CONSTANT, p.getRight().getExpressionType());

        // Same test but now R2 is outer table R1.A = R2.A AND R2.A = 1 => R1.A = 1 AND R2.A = 1
        pn = compile("select * FROM R2 LEFT JOIN R1 ON R1.A = R2.A AND R2.A = 1 ");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        jn = (AbstractJoinPlanNode) n;
        assertNull(jn.getJoinPredicate());
        p = jn.getPreJoinPredicate();
        assertNotNull(p);
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        assertEquals(ExpressionType.VALUE_TUPLE, p.getLeft().getExpressionType());
        assertEquals(ExpressionType.VALUE_CONSTANT, p.getRight().getExpressionType());
        assertTrue(jn.getChild(1) instanceof SeqScanPlanNode);
        ssn = (SeqScanPlanNode)jn.getChild(1);
        assertNotNull(ssn.getPredicate());
        p = ssn.getPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        assertEquals(ExpressionType.VALUE_TUPLE, p.getLeft().getExpressionType());
        assertEquals(ExpressionType.VALUE_CONSTANT, p.getRight().getExpressionType());

        // R1.A = R2.A AND R2.C = 1 => R1.A = R2.A AND R2.C = 1
        pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.A = R2.A AND R2.C = 1 ");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) n).getJoinPredicate();
        assertNotNull(p);
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        AbstractExpression l = p.getLeft();
        AbstractExpression r = p.getRight();
        assertEquals(ExpressionType.VALUE_TUPLE, l.getExpressionType());
        assertEquals(ExpressionType.VALUE_TUPLE, r.getExpressionType());

        // R1.A = R2.A AND ABS(R2.C) = 1 => R1.A = R2.A AND ABS(R2.C) = 1
        pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.A = R2.A AND ABS(R2.C) = 1 ");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) n).getJoinPredicate();
        assertNotNull(p);
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        l = p.getLeft();
        r = p.getRight();
        assertEquals(ExpressionType.VALUE_TUPLE, l.getExpressionType());
        assertEquals(ExpressionType.VALUE_TUPLE, r.getExpressionType());

        // R1.A = R3.A - NLIJ
        pn = compile("select * FROM R1 LEFT JOIN R3 ON R1.A = R3.A");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopIndexPlanNode);
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    public void testFunctionJoinConditions() {
        AbstractPlanNode pn = compile("select * FROM R1 JOIN R2 ON ABS(R1.A) = ABS(R2.A) ");
        AbstractPlanNode n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        AbstractExpression p = ((AbstractJoinPlanNode) n).getJoinPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        assertEquals(ExpressionType.FUNCTION, p.getLeft().getExpressionType());
        assertEquals(ExpressionType.FUNCTION, p.getRight().getExpressionType());

        pn = compile("select * FROM R1 ,R2 WHERE ABS(R1.A) = ABS(R2.A) ");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) n).getJoinPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        assertEquals(ExpressionType.FUNCTION, p.getLeft().getExpressionType());
        assertEquals(ExpressionType.FUNCTION, p.getRight().getExpressionType());

        pn = compile("select * FROM R1 ,R2");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof AbstractJoinPlanNode);
        p = ((AbstractJoinPlanNode) n).getJoinPredicate();
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        pn = compile("select * FROM R3 WHERE R3.A > 0 and R3.A < 5 and R3.C = 4");
        n = pn.getChild(0);
        assertTrue(n instanceof IndexScanPlanNode);
        IndexScanPlanNode indexScan = (IndexScanPlanNode) n;
        AbstractExpression p = indexScan.getPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        p = indexScan.getEndExpression();
        assertEquals(ExpressionType.COMPARE_LESSTHAN, p.getExpressionType());
        assertEquals(IndexLookupType.GT, indexScan.getLookupType());

        pn = compile("select * FROM R3, R2 WHERE R3.A = R2.A AND R3.C > 0 and R2.C >= 5");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopIndexPlanNode);
        assertNull(((NestLoopIndexPlanNode) n).getJoinPredicate());
        indexScan = (IndexScanPlanNode)n.getInlinePlanNode(PlanNodeType.INDEXSCAN);
        assertEquals(IndexLookupType.EQ, indexScan.getLookupType());
        assertEquals(ExpressionType.COMPARE_EQUAL, indexScan.getEndExpression().getExpressionType());
        assertEquals(ExpressionType.COMPARE_GREATERTHAN, indexScan.getPredicate().getExpressionType());
        AbstractPlanNode seqScan = n.getChild(0);
        assertTrue(seqScan instanceof SeqScanPlanNode);
        assertEquals(ExpressionType.COMPARE_GREATERTHANOREQUALTO, ((SeqScanPlanNode)seqScan).getPredicate().getExpressionType());

        pn = compile("select * FROM R3 JOIN R2 ON R3.A = R2.A WHERE R3.C > 0 and R2.C >= 5");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopIndexPlanNode);
        assertNull(((NestLoopIndexPlanNode) n).getJoinPredicate());
        indexScan = (IndexScanPlanNode)n.getInlinePlanNode(PlanNodeType.INDEXSCAN);
        assertEquals(IndexLookupType.EQ, indexScan.getLookupType());
        assertEquals(ExpressionType.COMPARE_EQUAL, indexScan.getEndExpression().getExpressionType());
        seqScan = n.getChild(0);
        assertTrue(seqScan instanceof SeqScanPlanNode);
        assertEquals(ExpressionType.COMPARE_GREATERTHANOREQUALTO, ((SeqScanPlanNode)seqScan).getPredicate().getExpressionType());

        pn = compile("select * FROM R3 JOIN R2 USING(A) WHERE R3.C > 0 and R2.C >= 5");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopIndexPlanNode);
        assertNull(((NestLoopIndexPlanNode) n).getJoinPredicate());
        indexScan = (IndexScanPlanNode)n.getInlinePlanNode(PlanNodeType.INDEXSCAN);
        assertEquals(IndexLookupType.EQ, indexScan.getLookupType());
        assertEquals(ExpressionType.COMPARE_EQUAL, indexScan.getEndExpression().getExpressionType());
        seqScan = n.getChild(0);
        assertTrue(seqScan instanceof SeqScanPlanNode);
        assertEquals(ExpressionType.COMPARE_GREATERTHANOREQUALTO, ((SeqScanPlanNode)seqScan).getPredicate().getExpressionType());

        pn = compile("select * FROM R3 JOIN R2 ON R3.A = R2.A JOIN R1 ON R2.A = R1.A WHERE R3.C > 0 and R2.C >= 5");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopPlanNode);
        p = ((NestLoopPlanNode) n).getJoinPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        assertEquals(ExpressionType.VALUE_TUPLE, p.getLeft().getExpressionType());
        assertEquals(ExpressionType.VALUE_TUPLE, p.getRight().getExpressionType());
        seqScan = n.getChild(1);
        assertTrue(seqScan instanceof SeqScanPlanNode);
        n = n.getChild(0);
        assertTrue(n instanceof NestLoopIndexPlanNode);
        NestLoopIndexPlanNode nlij = (NestLoopIndexPlanNode) n;
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        // Test multi column condition on non index columns
        AbstractPlanNode pn = compile("select A, C FROM R2 JOIN R1 USING(A, C)");
        AbstractPlanNode n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopPlanNode);
        NestLoopPlanNode nlj = (NestLoopPlanNode) n;
        AbstractExpression pred = nlj.getJoinPredicate();
        assertNotNull(pred);
        assertEquals(ExpressionType.CONJUNCTION_AND, pred.getExpressionType());

        pn = compile("select R1.A, R2.A FROM R2 JOIN R1 on R1.A = R2.A and R1.C = R2.C");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopPlanNode);
        nlj = (NestLoopPlanNode) n;
        pred = nlj.getJoinPredicate();
        assertNotNull(pred);
        assertEquals(ExpressionType.CONJUNCTION_AND, pred.getExpressionType());

       // Test multi column condition on index columns
        pn = compile("select A FROM R2 JOIN R3 USING(A)");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopIndexPlanNode);
        NestLoopIndexPlanNode nlij = (NestLoopIndexPlanNode) n;
        assertEquals(IndexLookupType.EQ, ((IndexScanPlanNode) nlij.getInlinePlanNode(PlanNodeType.INDEXSCAN)).getLookupType());

        pn = compile("select R3.A, R2.A FROM R2 JOIN R3 ON R3.A = R2.A");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopIndexPlanNode);
        nlij = (NestLoopIndexPlanNode) n;
        pred = ((IndexScanPlanNode) nlij.getInlinePlanNode(PlanNodeType.INDEXSCAN)).getPredicate();
        assertEquals(IndexLookupType.EQ, ((IndexScanPlanNode) nlij.getInlinePlanNode(PlanNodeType.INDEXSCAN)).getLookupType());

        pn = compile("select A, C FROM R3 JOIN R2 USING(A, C)");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopIndexPlanNode);
        nlij = (NestLoopIndexPlanNode) n;
        pred = ((IndexScanPlanNode) nlij.getInlinePlanNode(PlanNodeType.INDEXSCAN)).getPredicate();
        assertNotNull(pred);
        assertEquals(ExpressionType.COMPARE_EQUAL, pred.getExpressionType());

        pn = compile("select R3.A, R2.A FROM R3 JOIN R2 ON R3.A = R2.A AND R3.C = R2.C");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopIndexPlanNode);
        nlij = (NestLoopIndexPlanNode) n;
        pred = ((IndexScanPlanNode) nlij.getInlinePlanNode(PlanNodeType.INDEXSCAN)).getPredicate();
        assertNotNull(pred);
        assertEquals(ExpressionType.COMPARE_EQUAL, pred.getExpressionType());
}
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        pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.C = R2.C AND R1.A > 0 AND R2.A < 0");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopPlanNode);
        nl = (NestLoopPlanNode) n;
        assertNotNull(nl.getPreJoinPredicate());
        AbstractExpression p = nl.getPreJoinPredicate();
        assertEquals(ExpressionType.COMPARE_GREATERTHAN, p.getExpressionType());
        assertNotNull(nl.getJoinPredicate());
        p = nl.getJoinPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        assertNull(nl.getWherePredicate());
        assertEquals(2, nl.getChildCount());
        c0 = (SeqScanPlanNode) nl.getChild(0);
        assertNull(c0.getPredicate());
        c1 = (SeqScanPlanNode) nl.getChild(1);
        assertNotNull(c1.getPredicate());
        p = c1.getPredicate();
        assertEquals(ExpressionType.COMPARE_LESSTHAN, p.getExpressionType());

        // R1.C = R2.C Inner-Outer join Expr stays at the NLJ as Join predicate
        // (R1.A > 0 OR R2.A < 0) Inner-Outer join Expr stays at the NLJ as Join predicate
        pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.C = R2.C AND (R1.A > 0 OR R2.A < 0)");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopPlanNode);
        nl = (NestLoopPlanNode) n;
        p = nl.getJoinPredicate();
        assertEquals(ExpressionType.CONJUNCTION_AND, p.getExpressionType());
        if (ExpressionType.CONJUNCTION_OR == p.getLeft().getExpressionType()) {
            assertEquals(ExpressionType.CONJUNCTION_OR, p.getLeft().getExpressionType());
        } else {
            assertEquals(ExpressionType.CONJUNCTION_OR, p.getRight().getExpressionType());
        }
        assertNull(nl.getWherePredicate());
        assertEquals(2, nl.getChildCount());
        c0 = (SeqScanPlanNode) nl.getChild(0);
        assertNull(c0.getPredicate());
        c1 = (SeqScanPlanNode) nl.getChild(1);
        assertNull(c1.getPredicate());

        // R1.C = R2.C Inner-Outer join Expr stays at the NLJ as Join predicate
        // R1.A > 0 Outer Where Expr is pushed down to the outer SeqScan node
        // R2.A IS NULL Inner Where Expr stays at the the NLJ as post join (where) predicate
        // (R1.C > R2.C OR R2.C IS NULL) Inner-Outer Where stays at the the NLJ as post join (where) predicate
        pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.C = R2.C WHERE R1.A > 0 AND R2.A IS NULL AND (R1.C > R2.C OR R2.C IS NULL)");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopPlanNode);
        nl = (NestLoopPlanNode) n;
        assertEquals(JoinType.LEFT, nl.getJoinType());
        assertNotNull(nl.getJoinPredicate());
        p = nl.getJoinPredicate();
        assertEquals(ExpressionType.COMPARE_EQUAL, p.getExpressionType());
        AbstractExpression w = nl.getWherePredicate();
        assertNotNull(w);
        assertEquals(ExpressionType.CONJUNCTION_AND, w.getExpressionType());
        assertEquals(ExpressionType.OPERATOR_IS_NULL, w.getRight().getExpressionType());
        assertEquals(ExpressionType.CONJUNCTION_OR, w.getLeft().getExpressionType());
        assertEquals(2, nl.getChildCount());
        c0 = (SeqScanPlanNode) nl.getChild(0);
        assertEquals(ExpressionType.COMPARE_GREATERTHAN, c0.getPredicate().getExpressionType());
        c1 = (SeqScanPlanNode) nl.getChild(1);
        assertNull(c1.getPredicate());
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        AbstractPlanNode n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopIndexPlanNode);
        NestLoopIndexPlanNode nlij = (NestLoopIndexPlanNode) n;
        assertEquals(JoinType.LEFT, nlij.getJoinType());
        assertNotNull(nlij.getPreJoinPredicate());
        AbstractExpression p = nlij.getPreJoinPredicate();
        assertEquals(ExpressionType.COMPARE_LESSTHAN, p.getExpressionType());
        assertNull(nlij.getJoinPredicate());
        assertNull(nlij.getWherePredicate());
        IndexScanPlanNode indexScan = (IndexScanPlanNode)n.getInlinePlanNode(PlanNodeType.INDEXSCAN);
        assertEquals(IndexLookupType.EQ, indexScan.getLookupType());
        assertEquals(ExpressionType.COMPARE_EQUAL, indexScan.getEndExpression().getExpressionType());
        assertEquals(ExpressionType.COMPARE_GREATERTHAN, indexScan.getPredicate().getExpressionType());
        AbstractPlanNode c1 = n.getChild(0);
        assertTrue(c1 instanceof SeqScanPlanNode);
        assertNull(((SeqScanPlanNode)c1).getPredicate());

        // R1.C = R3.A Inner-Outer non-index join Expr. NLJ/IndexScan
        // R3.A > 0 Inner index Join Expr is pushed down to the inner IndexScan node as an index
        // R3.C != 0 Non-index Inner Join Expression is pushed down to the inner IndexScan node as a predicate
        // R2.A < 6 Outer Join Expr is a pre-join predicate for NLJ
        pn = compile("select * FROM R2 LEFT JOIN R3 ON R3.C = R2.A AND R3.A > 0 AND R3.C != 0 AND R2.A < 6");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopPlanNode);
        NestLoopPlanNode nlj = (NestLoopPlanNode) n;
        assertEquals(JoinType.LEFT, nlj.getJoinType());
        assertNotNull(nlj.getPreJoinPredicate());
        p = nlj.getPreJoinPredicate();
        assertEquals(ExpressionType.COMPARE_LESSTHAN, p.getExpressionType());
        assertNotNull(nlj.getJoinPredicate());
        assertEquals(ExpressionType.COMPARE_EQUAL, nlj.getJoinPredicate().getExpressionType());
        assertNull(nlj.getWherePredicate());
        c1 = n.getChild(0);
        assertTrue(c1 instanceof SeqScanPlanNode);
        assertNull(((SeqScanPlanNode)c1).getPredicate());
        AbstractPlanNode c2 = n.getChild(1);
        assertTrue(c2 instanceof IndexScanPlanNode);
        indexScan = (IndexScanPlanNode) c2;
        assertEquals(IndexLookupType.GT, indexScan.getLookupType());
        assertNotNull(indexScan.getPredicate());
        assertEquals(ExpressionType.COMPARE_NOTEQUAL, indexScan.getPredicate().getExpressionType());

        // R2.A = R3.A Inner-Outer index join Expr. NLIJ/Inlined IndexScan
        // R3.A IS NULL Inner where expr - part of the NLIJ where predicate
        // R2.A < 6 OR R3.C IS NULL Inner-Outer where expr - part of the NLIJ where predicate
        // R2.A > 3 Outer where expr - pushed down to the outer node
        pn = compile("select * FROM R2 LEFT JOIN R3 ON R3.A = R2.A WHERE R3.A IS NULL AND R2.A > 3 AND (R2.A < 6 OR R3.C IS NULL)");
        n = pn.getChild(0).getChild(0);
        assertTrue(n instanceof NestLoopIndexPlanNode);
        assertEquals(((NestLoopIndexPlanNode) n).getJoinType(), JoinType.LEFT);
        assertNull(((NestLoopIndexPlanNode) n).getPreJoinPredicate());
        assertNull(((NestLoopIndexPlanNode) n).getJoinPredicate());
        assertNotNull(((NestLoopIndexPlanNode) n).getWherePredicate());
        AbstractExpression w = ((NestLoopIndexPlanNode) n).getWherePredicate();
        assertEquals(ExpressionType.CONJUNCTION_AND, w.getExpressionType());
        assertEquals(ExpressionType.OPERATOR_IS_NULL, w.getRight().getExpressionType());
        assertEquals(ExpressionType.CONJUNCTION_OR, w.getLeft().getExpressionType());
        indexScan = (IndexScanPlanNode)n.getInlinePlanNode(PlanNodeType.INDEXSCAN);
        assertEquals(IndexLookupType.EQ, indexScan.getLookupType());
        assertEquals(ExpressionType.COMPARE_EQUAL, indexScan.getEndExpression().getExpressionType());
        c1 = n.getChild(0);
        assertTrue(c1 instanceof SeqScanPlanNode);
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        n = lpn.get(1).getChild(0);
        assertTrue(n instanceof NestLoopIndexPlanNode);
        assertEquals(JoinType.LEFT, ((NestLoopIndexPlanNode) n).getJoinType());
        assertNull(((NestLoopIndexPlanNode) n).getJoinPredicate());
        assertNotNull(((NestLoopIndexPlanNode) n).getWherePredicate());
        AbstractExpression w = ((NestLoopIndexPlanNode) n).getWherePredicate();
        assertEquals(ExpressionType.OPERATOR_IS_NULL, w.getExpressionType());
        IndexScanPlanNode indexScan = (IndexScanPlanNode)n.getInlinePlanNode(PlanNodeType.INDEXSCAN);
        assertEquals(IndexLookupType.EQ, indexScan.getLookupType());
        assertEquals(ExpressionType.COMPARE_EQUAL, indexScan.getEndExpression().getExpressionType());
        w = indexScan.getPredicate();
        assertNotNull(w);
        assertEquals(ExpressionType.COMPARE_LESSTHAN, w.getExpressionType());
    }
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   }


   public void testOuterJoinSimplification() {
       AbstractPlanNode pn, n;
       AbstractExpression ex;

       pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.C = R2.C WHERE R2.C IS NOT NULL");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.INNER);

       pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.C = R2.C WHERE R2.C > 0");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.INNER);

       pn = compile("select * FROM R1 RIGHT JOIN R2 ON R1.C = R2.C WHERE R1.C > 0");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.INNER);

       pn = compile("select * FROM R1 LEFT JOIN R3 ON R1.C = R3.C WHERE R3.A > 0");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.INNER);

       pn = compile("select * FROM R1 LEFT JOIN R3 ON R1.C = R3.A WHERE R3.A > 0");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopIndexPlanNode);
       assertEquals(((NestLoopIndexPlanNode) n).getJoinType(), JoinType.INNER);

       pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.C = R2.C WHERE ABS(R2.C) <  10");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.INNER);

       pn = compile("select * FROM R1 RIGHT JOIN R2 ON R1.C = R2.C WHERE ABS(R1.C) <  10");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.INNER);

       pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.C = R2.C WHERE ABS(R1.C) <  10");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.LEFT);

       pn = compile("select * FROM R1 RIGHT JOIN R2 ON R1.C = R2.C WHERE ABS(R2.C) <  10");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.LEFT);

       pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.C = R2.C WHERE ABS(R2.C) <  10 AND R1.C = 3");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.INNER);

       pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.C = R2.C WHERE ABS(R2.C) <  10 OR R2.C IS NOT NULL");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.INNER);

       pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.C = R2.C WHERE ABS(R1.C) <  10 AND R1.C > 3");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.LEFT);

       pn = compile("select * FROM R1 LEFT JOIN R2 ON R1.C = R2.C WHERE ABS(R1.C) <  10 OR R2.C IS NOT NULL");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.LEFT);

       // Test with seqscan with different filers.
       pn = compile("select R2.A, R1.* FROM R1 LEFT OUTER JOIN R2 ON R2.A = R1.A WHERE R2.A > 3");
       //* enable for debug */ System.out.println(pn.toExplainPlanString());
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.INNER);
       ex = ((NestLoopPlanNode) n).getWherePredicate();
       assertEquals(ex, null);

       pn = compile("select R2.A, R1.* FROM R1 LEFT OUTER JOIN R2 ON R2.A = R1.A WHERE R2.A IS NULL");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopPlanNode);
       assertEquals(((NestLoopPlanNode) n).getJoinType(), JoinType.LEFT);
       ex = ((NestLoopPlanNode) n).getWherePredicate();
       assertEquals(ex instanceof OperatorExpression, true);

       pn = compile("select b.A, a.* FROM R1 a LEFT OUTER JOIN R4 b ON b.A = a.A AND b.C = a.C AND a.D = b.D WHERE b.A IS NULL");
       //* enable for debug */ System.out.println(pn.toExplainPlanString());
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopIndexPlanNode);
       assertEquals(((NestLoopIndexPlanNode) n).getJoinType(), JoinType.LEFT);
       ex = ((NestLoopIndexPlanNode) n).getWherePredicate();
       assertEquals(ex instanceof OperatorExpression, true);

       pn = compile("select b.A, a.* FROM R1 a LEFT OUTER JOIN R4 b ON b.A = a.A AND b.C = a.C AND a.D = b.D WHERE b.B + b.A IS NULL");
       n = pn.getChild(0).getChild(0);
       assertTrue(n instanceof NestLoopIndexPlanNode);
       assertEquals(((NestLoopIndexPlanNode) n).getJoinType(), JoinType.LEFT);
       ex = ((NestLoopIndexPlanNode) n).getWherePredicate();
       assertEquals(ex instanceof OperatorExpression, true);
       assertEquals(ex.getLeft() instanceof OperatorExpression, true);

       pn = compile("select a.* FROM R1 a LEFT OUTER JOIN R5 b ON b.A = a.A WHERE b.A IS NULL");
       n = pn.getChild(0).getChild(0);
       assertEquals(((NestLoopIndexPlanNode) n).getJoinType(), JoinType.LEFT);
       ex = ((NestLoopIndexPlanNode) n).getWherePredicate();
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