Package com.facebook.presto.metadata

Examples of com.facebook.presto.metadata.Signature

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            Map<Symbol, FunctionCall> finalCalls = new HashMap<>();
            Map<Symbol, FunctionCall> intermediateCalls = new HashMap<>();
            Map<Symbol, Signature> intermediateFunctions = new HashMap<>();
            Map<Symbol, Symbol> intermediateMask = new HashMap<>();
            for (Map.Entry<Symbol, FunctionCall> entry : aggregations.entrySet()) {
                Signature signature = functions.get(entry.getKey());
                FunctionInfo function = metadata.getExactFunction(signature);

                Symbol intermediateSymbol = allocator.newSymbol(function.getName().getSuffix(), function.getIntermediateType());
                intermediateCalls.put(intermediateSymbol, entry.getValue());
                intermediateFunctions.put(intermediateSymbol, signature);
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            ImmutableList.Builder<WindowFunction> windowFunctions = ImmutableList.builder();
            List<Symbol> windowFunctionOutputSymbols = new ArrayList<>();
            for (Map.Entry<Symbol, FunctionCall> entry : node.getWindowFunctions().entrySet()) {
                Symbol symbol = entry.getKey();
                Signature signature = node.getSignatures().get(symbol);
                windowFunctions.add(metadata.getExactFunction(signature).getWindowFunction().get());
                windowFunctionOutputSymbols.add(symbol);
            }

            // compute the layout of the output from the window operator
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                for (Expression argument : entry.getValue().getArguments()) {
                    Symbol argumentSymbol = Symbol.fromQualifiedName(((QualifiedNameReference) argument).getName());
                    arguments.add(source.getLayout().get(argumentSymbol));
                }
                Symbol symbol = entry.getKey();
                Signature signature = node.getSignatures().get(symbol);
                windowFunctions.add(metadata.getExactFunction(signature).bindWindowFunction(arguments.build()));
                windowFunctionOutputSymbols.add(symbol);
            }

            // compute the layout of the output from the window operator
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            if (source instanceof ProjectNode) {
                ProjectNode projectNode = (ProjectNode) source;
                for (Entry<Symbol, FunctionCall> entry : node.getAggregations().entrySet()) {
                    Symbol symbol = entry.getKey();
                    FunctionCall functionCall = entry.getValue();
                    Signature signature = node.getFunctions().get(symbol);
                    if (isCountConstant(projectNode, functionCall, signature)) {
                        aggregations.put(symbol, new FunctionCall(functionCall.getName(), null, functionCall.isDistinct(), ImmutableList.<Expression>of()));
                        functions.put(symbol, new Signature("count", BIGINT));
                    }
                }
            }

            return new AggregationNode(
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        private boolean isRowNumberFunction(WindowNode node)
        {
            checkArgument(node.getWindowFunctions().size() == 1);
            Symbol symbol = Iterables.getOnlyElement(node.getWindowFunctions().entrySet()).getKey();
            Signature signature = node.getSignatures().get(symbol);
            WindowFunction function = metadata.getExactFunction(signature).bindWindowFunction(ImmutableList.<Integer>of()).createWindowFunction();
            return function instanceof RowNumberFunction;
        }
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                for (Expression argument : entry.getValue().getArguments()) {
                    Symbol argumentSymbol = Symbol.fromQualifiedName(((QualifiedNameReference) argument).getName());
                    arguments.add(source.getLayout().get(argumentSymbol));
                }
                Symbol symbol = entry.getKey();
                Signature signature = node.getSignatures().get(symbol);
                windowFunctionsBuilder.add(metadata.getExactFunction(signature).bindWindowFunction(arguments.build()));
                windowFunctionOutputSymbolsBuilder.add(symbol);
            }

            List<Symbol> windowFunctionOutputSymbols = windowFunctionOutputSymbolsBuilder.build();
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    }

    // **************** sql operators ****************
    public static Signature notSignature()
    {
        return new Signature("not", BOOLEAN, ImmutableList.of(BOOLEAN));
    }
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    }

    // **************** special forms (lazy evaluation, etc) ****************
    public static Signature ifSignature(Type returnType)
    {
        return new Signature(IF, returnType);
    }
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        return new Signature(IF, returnType);
    }

    public static Signature nullIfSignature(Type returnType, Type firstType, Type secondType)
    {
        return new Signature(NULL_IF, returnType, firstType, secondType);
    }
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        return new Signature(NULL_IF, returnType, firstType, secondType);
    }

    public static Signature switchSignature(Type returnType)
    {
        return new Signature(SWITCH, returnType);
    }
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Related Classes of com.facebook.presto.metadata.Signature

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  • com.facebook.presto.operator.aggregation.CountColumn
  • com.facebook.presto.operator.aggregation.MaxBy
  • com.facebook.presto.operator.aggregation.TestMaxByAggregation
  • com.facebook.presto.operator.scalar.ArrayCardinalityFunction
  • com.facebook.presto.operator.scalar.MapConstructor
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  • com.facebook.presto.operator.window.ReflectionWindowFunctionSupplier
  • com.facebook.presto.spi.type.Type
  • com.facebook.presto.spi.type.TypeSignature
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