Package com.facebook.presto.sql.tree

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

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                FieldOrExpression orderByExpression = null;
                if (expression instanceof QualifiedNameReference && !((QualifiedNameReference) expression).getName().getPrefix().isPresent()) {
                    // if this is a simple name reference, try to resolve against output columns

                    QualifiedName name = ((QualifiedNameReference) expression).getName();
                    Collection<Expression> expressions = byAlias.get(name);
                    if (expressions.size() > 1) {
                        throw new SemanticException(AMBIGUOUS_ATTRIBUTE, expression, "'%s' in ORDER BY is ambiguous", name.getSuffix());
                    }
                    else if (expressions.size() == 1) {
                        orderByExpression = new FieldOrExpression(Iterables.getOnlyElement(expressions));
                    }
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        }

        if (type.equals(DOUBLE)) {
            Double value = (Double) object;
            if (value.isNaN()) {
                return new FunctionCall(new QualifiedName("nan"), ImmutableList.<Expression>of());
            }
            else if (value == Double.NEGATIVE_INFINITY) {
                return new NegativeExpression(new FunctionCall(new QualifiedName("infinity"), ImmutableList.<Expression>of()));
            }
            else if (value == Double.POSITIVE_INFINITY) {
                return new FunctionCall(new QualifiedName("infinity"), ImmutableList.<Expression>of());
            }
            else {
                return new DoubleLiteral(object.toString());
            }
        }

        if (type.equals(VARCHAR)) {
            if (object instanceof Slice) {
                return new StringLiteral(((Slice) object).toString(UTF_8));
            }

            if (object instanceof String) {
                return new StringLiteral((String) object);
            }
        }

        if (type.equals(BOOLEAN)) {
            return new BooleanLiteral(object.toString());
        }

        Signature signature = FunctionRegistry.getMagicLiteralFunctionSignature(type);
        Expression rawLiteral = toExpression(object, FunctionRegistry.type(type.getJavaType()));
        return new FunctionCall(new QualifiedName(signature.getName()), ImmutableList.of(rawLiteral));
    }
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        return tableName;
    }

    public QualifiedName asQualifiedName()
    {
        return new QualifiedName(ImmutableList.of(catalogName, schemaName, tableName));
    }
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    }

    @Override
    protected TypedByteCodeNode visitCurrentTime(CurrentTime node, CompilerContext context)
    {
        return visitFunctionCall(new FunctionCall(new QualifiedName("now"), ImmutableList.<Expression>of()), context);
    }
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        if (node.getField() == Extract.Field.TIMEZONE_HOUR || node.getField() == Extract.Field.TIMEZONE_MINUTE) {
            // TODO: we assume all times are UTC for now
            return typedByteCodeNode(new Block(context).append(expression.getNode()).pop(long.class).push(0L), long.class);
        }

        QualifiedName functionName = QualifiedName.of(node.getField().name().toLowerCase());
        FunctionBinding functionBinding = bootstrapFunctionBinder.bindFunction(functionName, getSessionByteCode, ImmutableList.of(expression));
        return visitFunctionBinding(context, functionBinding, node.toString());
    }
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        return ExpressionTreeRewriter.rewriteWith(new ExpressionRewriter<Void>()
        {
            @Override
            public Expression rewriteQualifiedNameReference(QualifiedNameReference node, Void context, ExpressionTreeRewriter<Void> treeRewriter)
            {
                QualifiedName name = node.getName();

                Integer fieldIndex = resolvedNames.get(name);
                Preconditions.checkState(fieldIndex != null, "No field mapping for name '%s'", name);

                Symbol symbol = rewriteBase.getSymbol(fieldIndex);
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    protected TupleDescriptor visitShowTables(ShowTables showTables, AnalysisContext context)
    {
        String catalogName = session.getCatalog();
        String schemaName = session.getSchema();

        QualifiedName schema = showTables.getSchema();
        if (schema != null) {
            List<String> parts = schema.getParts();
            if (parts.size() > 2) {
                throw new SemanticException(INVALID_SCHEMA_NAME, showTables, "too many parts in schema name: %s", schema);
            }
            if (parts.size() == 2) {
                catalogName = parts.get(0);
            }
            schemaName = schema.getSuffix();
        }

        // TODO: throw SemanticException if schema does not exist

        Expression predicate = equal(nameReference("table_schema"), new StringLiteral(schemaName));
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        // For a query like "SELECT * FROM T GROUP BY a", groupByExpressions will contain "a",
        // and the '*' will be expanded to Field references. Therefore we translate all simple name expressions
        // in the group by clause to fields they reference so that the expansion from '*' can be matched against them
        for (Expression expression : Iterables.filter(expressions, instanceOf(QualifiedNameReference.class))) {
            QualifiedName name = ((QualifiedNameReference) expression).getName();

            List<Field> fields = tupleDescriptor.resolveFields(name);
            Preconditions.checkState(fields.size() <= 1, "Found more than one field for name '%s': %s", name, fields);

            if (fields.size() == 1) {
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    {
        @Override
        protected Void visitFunctionCall(FunctionCall node, AtomicBoolean deterministic)
        {
            // TODO: total hack to figure out if a function is deterministic. martint should fix this when he refactors the planning code
            if (node.getName().equals(new QualifiedName("rand")) || node.getName().equals(new QualifiedName("random"))) {
                deterministic.set(false);
            }
            return super.visitFunctionCall(node, deterministic);
        }
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        }

        if (object instanceof Double) {
            Double value = (Double) object;
            if (value.isNaN()) {
                return new FunctionCall(new QualifiedName("nan"), ImmutableList.<Expression>of());
            }
            else if (value == Double.NEGATIVE_INFINITY) {
                return new NegativeExpression(new FunctionCall(new QualifiedName("infinity"), ImmutableList.<Expression>of()));
            }
            else if (value == Double.POSITIVE_INFINITY) {
                return new FunctionCall(new QualifiedName("infinity"), ImmutableList.<Expression>of());
            }
            else {
                return new DoubleLiteral(object.toString());
            }
        }
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Related Classes of com.facebook.presto.sql.tree.QualifiedName

  • com.facebook.presto.metadata.QualifiedTableName
  • com.facebook.presto.metadata.TestFunctionRegistry
  • com.facebook.presto.operator.aggregation.TestDoubleStdDevAggregation
  • com.facebook.presto.operator.aggregation.TestDoubleStdDevPopAggregation
  • com.facebook.presto.operator.aggregation.TestDoubleVarianceAggregation
  • com.facebook.presto.operator.aggregation.TestDoubleVariancePopAggregation
  • com.facebook.presto.operator.aggregation.TestLongStdDevAggregation
  • com.facebook.presto.operator.aggregation.TestLongStdDevPopAggregation
  • com.facebook.presto.operator.aggregation.TestLongVarianceAggregation
  • com.facebook.presto.operator.aggregation.TestLongVariancePopAggregation
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