Package com.facebook.presto.sql.tree

Examples of com.facebook.presto.sql.tree.LongLiteral

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        return new BetweenPredicate(reference(symbol), min, max);
    }

    private static LongLiteral longLiteral(long value)
    {
        return new LongLiteral(Long.toString(value));
    }
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                    // HACK! we don't support cross joins right now, so put in a simple fake join predicate instead if all of the join clauses got simplified out
                    // TODO: remove this code when cross join support is added
                    Iterable<Expression> simplifiedJoinConjuncts = transform(extractConjuncts(newJoinPredicate), simplifyExpressions());
                    simplifiedJoinConjuncts = filter(simplifiedJoinConjuncts, not(Predicates.<Expression>equalTo(BooleanLiteral.TRUE_LITERAL)));
                    if (Iterables.isEmpty(simplifiedJoinConjuncts)) {
                        simplifiedJoinConjuncts = ImmutableList.<Expression>of(new ComparisonExpression(ComparisonExpression.Type.EQUAL, new LongLiteral("0"), new LongLiteral("0")));
                    }

                    // Create new projections for the new join clauses
                    ImmutableList.Builder<JoinNode.EquiJoinClause> builder = ImmutableList.builder();
                    for (Expression conjunct : simplifiedJoinConjuncts) {
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            case EQUAL:
                Long equalValue = DoubleMath.roundToLong(value, RoundingMode.FLOOR);
                if (equalValue.doubleValue() != value) {
                    // Return something that is false for all non-null values
                    return and(new ComparisonExpression(EQUAL, reference, new LongLiteral("0")),
                            new ComparisonExpression(NOT_EQUAL, reference, new LongLiteral("0")));
                }
                return new ComparisonExpression(comparison.getType(), reference, toExpression(equalValue));

            case NOT_EQUAL:
                Long notEqualValue = DoubleMath.roundToLong(value, RoundingMode.FLOOR);
                if (notEqualValue.doubleValue() != value) {
                    // Return something that is true for all non-null values
                    return or(new ComparisonExpression(EQUAL, reference, new LongLiteral("0")),
                            new ComparisonExpression(NOT_EQUAL, reference, new LongLiteral("0")));
                }
                return new ComparisonExpression(comparison.getType(), reference, toExpression(notEqualValue));

            case IS_DISTINCT_FROM:
                Long distinctValue = DoubleMath.roundToLong(value, RoundingMode.FLOOR);
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        assertCast("foo");
    }

    public static void assertCast(String type)
    {
        assertExpression("cast(123 as " + type + ")", new Cast(new LongLiteral("123"), type));
    }
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    @Test
    public void testPositiveSign()
            throws Exception
    {
        assertExpression("9", new LongLiteral("9"));

        assertExpression("+9", new LongLiteral("9"));
        assertExpression("++9", new LongLiteral("9"));
        assertExpression("+++9", new LongLiteral("9"));

        assertExpression("+9", new LongLiteral("9"));
        assertExpression("+ +9", new LongLiteral("9"));
        assertExpression("+ + +9", new LongLiteral("9"));

        assertExpression("+ 9", new LongLiteral("9"));
        assertExpression("+ + 9", new LongLiteral("9"));
        assertExpression("+ + + 9", new LongLiteral("9"));
    }
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    }

    @Test
    public void testNegativeSign()
    {
        Expression expression = new LongLiteral("9");
        assertExpression("9", expression);

        expression = new NegativeExpression(expression);
        assertExpression("-9", expression);
        assertExpression("- 9", expression);
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    }

    private static QuerySpecification createSelect123()
    {
        return new QuerySpecification(
                new Select(false, ImmutableList.<SelectItem>of(new SingleColumn(new LongLiteral("123")))),
                null,
                Optional.<Expression>absent(),
                ImmutableList.<Expression>of(),
                Optional.<Expression>absent(),
                ImmutableList.<SortItem>of(),
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                new Query(
                        Optional.<With>absent(),
                        new Values(ImmutableList.of(
                                new Row(ImmutableList.<Expression>of(
                                        new StringLiteral("a"),
                                        new LongLiteral("1"),
                                        new DoubleLiteral("2.2")
                                )),
                                new Row(ImmutableList.<Expression>of(
                                        new StringLiteral("b"),
                                        new LongLiteral("2"),
                                        new DoubleLiteral("3.3")
                                ))
                        )),
                        ImmutableList.<SortItem>of(),
                        Optional.<String>absent(),
                        Optional.<Approximate>absent()));

        assertStatement("SELECT * FROM (VALUES ('a', 1, 2.2), ('b', 2, 3.3))",
                new Query(
                        Optional.<With>absent(),
                        new QuerySpecification(
                                selectList(new AllColumns()),
                                ImmutableList.<Relation>of(new TableSubquery(
                                        new Query(
                                                Optional.<With>absent(),
                                                new Values(ImmutableList.of(
                                                        new Row(ImmutableList.<Expression>of(
                                                                new StringLiteral("a"),
                                                                new LongLiteral("1"),
                                                                new DoubleLiteral("2.2")
                                                        )),
                                                        new Row(ImmutableList.<Expression>of(
                                                                new StringLiteral("b"),
                                                                new LongLiteral("2"),
                                                                new DoubleLiteral("3.3")
                                                        ))
                                                )),
                                                ImmutableList.<SortItem>of(),
                                                Optional.<String>absent(),
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                    // HACK! we don't support cross joins right now, so put in a simple fake join predicate instead if all of the join clauses got simplified out
                    // TODO: remove this code when cross join support is added
                    Iterable<Expression> simplifiedJoinConjuncts = transform(extractConjuncts(newJoinPredicate), simplifyExpressions());
                    simplifiedJoinConjuncts = filter(simplifiedJoinConjuncts, not(Predicates.<Expression>equalTo(BooleanLiteral.TRUE_LITERAL)));
                    if (Iterables.isEmpty(simplifiedJoinConjuncts)) {
                        simplifiedJoinConjuncts = ImmutableList.<Expression>of(new ComparisonExpression(ComparisonExpression.Type.EQUAL, new LongLiteral("0"), new LongLiteral("0")));
                    }

                    // Create new projections for the new join clauses
                    ImmutableList.Builder<JoinNode.EquiJoinClause> builder = ImmutableList.builder();
                    for (Expression conjunct : simplifiedJoinConjuncts) {
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            Object optimizedExpression = ExpressionInterpreter.expressionOptimizer(expression, metadata, session).optimize(NoOpSymbolResolver.INSTANCE);

            if (!(optimizedExpression instanceof Expression) && optimizedExpression instanceof Boolean) {
                // If the JoinOn clause evaluates to a boolean expression, simulate a cross join by adding the relevant redundant expression
                if (optimizedExpression.equals(Boolean.TRUE)) {
                    optimizedExpression = new ComparisonExpression(ComparisonExpression.Type.EQUAL, new LongLiteral("0"), new LongLiteral("0"));
                }
                else {
                    optimizedExpression = new ComparisonExpression(ComparisonExpression.Type.EQUAL, new LongLiteral("0"), new LongLiteral("1"));
                }
            }

            if (!(optimizedExpression instanceof Expression)) {
                throw new SemanticException(TYPE_MISMATCH, node, "Join clause must be a boolean expression");
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  • com.facebook.presto.sql.planner.ExpressionInterpreter
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  • com.facebook.presto.sql.planner.RelationPlanner
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