Package com.facebook.presto.sql.planner

Examples of com.facebook.presto.sql.planner.Symbol

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        {
            ImmutableSet.Builder<Symbol> expectedInputs = ImmutableSet.builder();

            ImmutableMap.Builder<Symbol, Expression> builder = ImmutableMap.builder();
            for (int i = 0; i < node.getOutputSymbols().size(); i++) {
                Symbol output = node.getOutputSymbols().get(i);
                Expression expression = node.getExpressions().get(i);

                if (expectedOutputs.contains(output)) {
                    expectedInputs.addAll(DependencyExtractor.extractUnique(expression));
                    builder.put(output, expression);
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            ImmutableMap.Builder<Symbol, Signature> functionInfos = ImmutableMap.builder();
            ImmutableMap.Builder<Symbol, FunctionCall> functionCalls = ImmutableMap.builder();
            ImmutableMap.Builder<Symbol, Symbol> masks = ImmutableMap.builder();
            for (Map.Entry<Symbol, FunctionCall> entry : node.getAggregations().entrySet()) {
                Symbol symbol = entry.getKey();
                Symbol canonical = canonicalize(symbol);
                FunctionCall canonicalCall = (FunctionCall) canonicalize(entry.getValue());
                functionCalls.put(canonical, canonicalCall);
                functionInfos.put(canonical, node.getFunctions().get(symbol));
            }
            for (Map.Entry<Symbol, Symbol> entry : node.getMasks().entrySet()) {
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            PlanNode source = planRewriter.rewrite(node.getSource(), context);

            ImmutableMap.Builder<Symbol, Signature> functionInfos = ImmutableMap.builder();
            ImmutableMap.Builder<Symbol, FunctionCall> functionCalls = ImmutableMap.builder();
            for (Map.Entry<Symbol, FunctionCall> entry : node.getWindowFunctions().entrySet()) {
                Symbol symbol = entry.getKey();
                Symbol canonical = canonicalize(symbol);
                functionCalls.put(canonical, (FunctionCall) canonicalize(entry.getValue()));
                functionInfos.put(canonical, node.getSignatures().get(symbol));
            }

            ImmutableMap.Builder<Symbol, SortOrder> orderings = ImmutableMap.builder();
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            Map<Symbol, Expression> assignments = new LinkedHashMap<>();
            for (Map.Entry<Symbol, Expression> entry : node.getOutputMap().entrySet()) {
                Expression expression = canonicalize(entry.getValue());

                if (entry.getValue() instanceof QualifiedNameReference) {
                    Symbol symbol = Symbol.fromQualifiedName(((QualifiedNameReference) entry.getValue()).getName());
                    if (!symbol.equals(entry.getKey())) {
                        map(entry.getKey(), symbol);
                    }
                }

                Symbol canonical = canonicalize(entry.getKey());

                if (!assignments.containsKey(canonical)) {
                    assignments.put(canonical, expression);
                }
            }
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            PlanNode source = planRewriter.rewrite(node.getSource(), context);

            ImmutableList.Builder<Symbol> symbols = ImmutableList.builder();
            ImmutableMap.Builder<Symbol, SortOrder> orderings = ImmutableMap.builder();
            for (Symbol symbol : node.getOrderBy()) {
                Symbol canonical = canonicalize(symbol);
                symbols.add(canonical);
                orderings.put(canonical, node.getOrderings().get(symbol));
            }

            return new TopNNode(node.getId(), source, node.getCount(), symbols.build(), orderings.build(), node.isPartial(), canonicalize(node.getSampleWeight()));
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            PlanNode source = planRewriter.rewrite(node.getSource(), context);

            ImmutableList.Builder<Symbol> symbols = ImmutableList.builder();
            ImmutableMap.Builder<Symbol, SortOrder> orderings = ImmutableMap.builder();
            for (Symbol symbol : node.getOrderBy()) {
                Symbol canonical = canonicalize(symbol);
                symbols.add(canonical);
                orderings.put(canonical, node.getOrderings().get(symbol));
            }

            return new SortNode(node.getId(), source, symbols.build(), orderings.build());
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            return Optional.absent();
        }

        private Symbol canonicalize(Symbol symbol)
        {
            Symbol canonical = symbol;
            while (mapping.containsKey(canonical)) {
                canonical = mapping.get(canonical);
            }
            return canonical;
        }
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            return ExpressionTreeRewriter.rewriteWith(new ExpressionRewriter<Void>()
            {
                @Override
                public Expression rewriteQualifiedNameReference(QualifiedNameReference node, Void context, ExpressionTreeRewriter<Void> treeRewriter)
                {
                    Symbol canonical = canonicalize(Symbol.fromQualifiedName(node.getName()));
                    return new QualifiedNameReference(canonical.toQualifiedName());
                }
            }, value);
        }
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                        boolean alignedComparison = Iterables.all(DependencyExtractor.extractUnique(equality.getLeft()), in(node.getLeft().getOutputSymbols()));
                        Expression leftExpression = (alignedComparison) ? equality.getLeft() : equality.getRight();
                        Expression rightExpression = (alignedComparison) ? equality.getRight() : equality.getLeft();

                        Symbol leftSymbol = symbolAllocator.newSymbol(leftExpression, extractType(leftExpression));
                        leftProjections.put(leftSymbol, leftExpression);
                        Symbol rightSymbol = symbolAllocator.newSymbol(rightExpression, extractType(rightExpression));
                        rightProjections.put(rightSymbol, rightExpression);

                        builder.add(new JoinNode.EquiJoinClause(leftSymbol, rightSymbol));
                    }
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            ImmutableMap.Builder<Symbol, Signature> functions = ImmutableMap.builder();
            ImmutableMap.Builder<Symbol, FunctionCall> functionCalls = ImmutableMap.builder();
            ImmutableMap.Builder<Symbol, Symbol> masks = ImmutableMap.builder();
            for (Map.Entry<Symbol, FunctionCall> entry : node.getAggregations().entrySet()) {
                Symbol symbol = entry.getKey();

                if (expectedOutputs.contains(symbol)) {
                    FunctionCall call = entry.getValue();
                    expectedInputs.addAll(DependencyExtractor.extractUnique(call));
                    if (node.getMasks().containsKey(symbol)) {
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