Package com.facebook.presto.sql.tree

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

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            schemaName = schema.getSuffix();
        }

        // TODO: throw SemanticException if schema does not exist

        Expression predicate = equal(nameReference("table_schema"), new StringLiteral(schemaName));

        String likePattern = showTables.getLikePattern();
        if (likePattern != null) {
            Expression likePredicate = new LikePredicate(nameReference("table_name"), new StringLiteral(likePattern), null);
            predicate = logicalAnd(predicate, likePredicate);
        }

        Query query = new Query(
                Optional.<With>absent(),
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        return process(query, context);
    }

    private static SelectItem aliasedYesNoToBoolean(String column, String alias)
    {
        Expression expression = new IfExpression(
                equal(nameReference(column), new StringLiteral("YES")),
                BooleanLiteral.TRUE_LITERAL,
                BooleanLiteral.FALSE_LITERAL);
        return new SingleColumn(expression, alias);
    }
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        selectList.add(unaliasedName("partition_number"));
        for (ColumnMetadata column : metadata.getTableMetadata(tableHandle.get()).getColumns()) {
            if (!column.isPartitionKey()) {
                continue;
            }
            Expression key = equal(nameReference("partition_key"), new StringLiteral(column.getName()));
            Expression value = caseWhen(key, nameReference("partition_value"));
            value = new Cast(value, Type.fromRaw(column.getType()).getName());
            Expression function = functionCall("max", value);
            selectList.add(new SingleColumn(function, column.getName()));
            wrappedList.add(unaliasedName(column.getName()));
        }

        Query query = new Query(
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        ImmutableList.Builder<FieldOrExpression> orderByFieldsBuilder = ImmutableList.builder();

        if (!items.isEmpty()) {
            for (SortItem item : items) {
                Expression expression = item.getSortKey();

                FieldOrExpression orderByField;
                if (expression instanceof LongLiteral) {
                    // this is an ordinal in the output tuple
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        ImmutableMap.Builder<Symbol, Expression> projections = ImmutableMap.builder();

        // add an identity projection for underlying plan
        for (Symbol symbol : subPlan.getRoot().getOutputSymbols()) {
            Expression expression = new QualifiedNameReference(symbol.toQualifiedName());
            projections.put(symbol, expression);
        }

        ImmutableMap.Builder<Symbol, Expression> newTranslations = ImmutableMap.builder();
        for (Expression expression : expressions) {
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            // TODO: implement proper "using" semantics with respect to output columns
            List<String> columns = ((JoinUsing) criteria).getColumns();

            ImmutableList.Builder<EquiJoinClause> builder = ImmutableList.builder();
            for (String column : columns) {
                Expression leftExpression = new QualifiedNameReference(QualifiedName.of(column));
                Expression rightExpression = new QualifiedNameReference(QualifiedName.of(column));

                ExpressionAnalysis leftExpressionAnalysis = Analyzer.analyzeExpression(session, metadata, left, analysis, context, leftExpression);
                ExpressionAnalysis rightExpressionAnalysis = Analyzer.analyzeExpression(session, metadata, right, analysis, context, rightExpression);
                Preconditions.checkState(leftExpressionAnalysis.getSubqueryInPredicates().isEmpty(), "INVARIANT");
                Preconditions.checkState(rightExpressionAnalysis.getSubqueryInPredicates().isEmpty(), "INVARIANT");

                builder.add(new EquiJoinClause(leftExpression, rightExpression));
            }

            analysis.setEquijoinCriteria(node, builder.build());
        }
        else if (criteria instanceof JoinOn) {
            Expression expression = ((JoinOn) criteria).getExpression();

            // ensure all names can be resolved, types match, etc (we don't need to record resolved names, subexpression types, etc. because
            // we do it further down when after we determine which subexpressions apply to left vs right tuple)
            ExpressionAnalyzer analyzer = new ExpressionAnalyzer(analysis, session, metadata);
            analyzer.analyze(expression, output, context);

            Analyzer.verifyNoAggregatesOrWindowFunctions(metadata, expression, "JOIN");

            Object optimizedExpression = ExpressionInterpreter.expressionOptimizer(expression, metadata, session).optimize(NoOpSymbolResolver.INSTANCE);

            if (!(optimizedExpression instanceof Expression)) {
                throw new SemanticException(NOT_SUPPORTED, node, "Joins on constant expressions (i.e., cross joins) not supported");
            }

            ImmutableList.Builder<EquiJoinClause> clauses = ImmutableList.builder();
            for (Expression conjunct : ExpressionUtils.extractConjuncts((Expression) optimizedExpression)) {
                if (!(conjunct instanceof ComparisonExpression)) {
                    throw new SemanticException(NOT_SUPPORTED, node, "Non-equi joins not supported: %s", conjunct);
                }

                ComparisonExpression comparison = (ComparisonExpression) conjunct;
                if (comparison.getType() != ComparisonExpression.Type.EQUAL) {
                    throw new SemanticException(NOT_SUPPORTED, node, "Non-equi joins not supported: %s", conjunct);
                }

                Set<QualifiedName> firstDependencies = DependencyExtractor.extract(comparison.getLeft());
                Set<QualifiedName> secondDependencies = DependencyExtractor.extract(comparison.getRight());

                Expression leftExpression;
                Expression rightExpression;
                if (Iterables.all(firstDependencies, left.canResolvePredicate()) && Iterables.all(secondDependencies, right.canResolvePredicate())) {
                    leftExpression = comparison.getLeft();
                    rightExpression = comparison.getRight();
                }
                else if (Iterables.all(firstDependencies, right.canResolvePredicate()) && Iterables.all(secondDependencies, left.canResolvePredicate())) {
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    }

    private void analyzeHaving(QuerySpecification node, TupleDescriptor tupleDescriptor, AnalysisContext context)
    {
        if (node.getHaving().isPresent()) {
            Expression predicate = node.getHaving().get();

            ExpressionAnalysis expressionAnalysis = Analyzer.analyzeExpression(session, metadata, tupleDescriptor, analysis, context, predicate);
            analysis.addInPredicates(node, expressionAnalysis.getSubqueryInPredicates());

            if (expressionAnalysis.getType() != Type.BOOLEAN && expressionAnalysis.getType() != Type.NULL) {
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                }
            }
            Multimap<QualifiedName, Expression> byAlias = byAliasBuilder.build();

            for (SortItem item : items) {
                Expression expression = item.getSortKey();

                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
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    }

    private void analyzeWhere(QuerySpecification node, TupleDescriptor tupleDescriptor, AnalysisContext context)
    {
        if (node.getWhere().isPresent()) {
            Expression predicate = node.getWhere().get();

            Analyzer.verifyNoAggregatesOrWindowFunctions(metadata, predicate, "WHERE");

            ExpressionAnalysis expressionAnalysis = Analyzer.analyzeExpression(session, metadata, tupleDescriptor, analysis, context, predicate);
            analysis.addInPredicates(node, expressionAnalysis.getSubqueryInPredicates());
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    {
        if (predicate == null) {
            return subPlan;
        }

        Expression rewritten = subPlan.rewrite(predicate);
        return new PlanBuilder(subPlan.getTranslations(), new FilterNode(idAllocator.getNextId(), subPlan.getRoot(), rewritten));
    }
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Related Classes of com.facebook.presto.sql.tree.Expression

  • com.facebook.presto.operator.scalar.FunctionAssertions
  • com.facebook.presto.split.TestNativeSplitManager
  • com.facebook.presto.sql.analyzer.AggregationAnalyzer$Visitor
  • com.facebook.presto.sql.analyzer.ExpressionAnalyzer$Visitor
  • com.facebook.presto.sql.analyzer.StatementAnalyzer
  • com.facebook.presto.sql.analyzer.TupleAnalyzer
  • com.facebook.presto.sql.ExpressionUtils
  • com.facebook.presto.sql.gen.ByteCodeExpressionVisitor
  • com.facebook.presto.sql.gen.ExpressionCompiler
  • com.facebook.presto.sql.gen.ExpressionKey
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