Package com.facebook.presto.metadata

Examples of com.facebook.presto.metadata.FunctionInfo

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            }
            if (value instanceof Expression) {
                return new NegativeExpression(toExpression(value, expressionTypes.get(node.getValue())));
            }

            FunctionInfo operatorInfo = metadata.resolveOperator(OperatorType.NEGATION, types(node.getValue()));

            MethodHandle handle = operatorInfo.getMethodHandle();
            if (handle.type().parameterCount() > 0 && handle.type().parameterType(0) == ConnectorSession.class) {
                handle = handle.bindTo(session);
            }
            try {
                return handle.invokeWithArguments(value);
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                return new NullIfExpression(toExpression(first, firstType), toExpression(second, secondType));
            }

            Type commonType = FunctionRegistry.getCommonSuperType(firstType, secondType).get();

            FunctionInfo firstCast = metadata.getExactOperator(OperatorType.CAST, commonType, ImmutableList.of(firstType));
            FunctionInfo secondCast = metadata.getExactOperator(OperatorType.CAST, commonType, ImmutableList.of(secondType));

            // cast(first as <common type>) == cast(second as <common type>)
            boolean equal = (Boolean) invokeOperator(
                    OperatorType.EQUAL,
                    ImmutableList.of(commonType, commonType),
                    ImmutableList.of(
                            invoke(session, firstCast.getMethodHandle(), ImmutableList.of(first)),
                            invoke(session, secondCast.getMethodHandle(), ImmutableList.of(second))));

            if (equal) {
                return null;
            }
            else {
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                }
                Type type = expressionTypes.get(expression);
                argumentValues.add(value);
                argumentTypes.add(type);
            }
            FunctionInfo function = metadata.resolveFunction(node.getName(), argumentTypes, false);

            // do not optimize non-deterministic functions
            if (optimize && (!function.isDeterministic() || hasUnresolvedValue(argumentValues))) {
                return new FunctionCall(node.getName(), node.getWindow().orNull(), node.isDistinct(), toExpressions(argumentValues, argumentTypes));
            }
            return invoke(session, function.getMethodHandle(), argumentValues);
        }
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            Type type = metadata.getType(node.getType());
            if (type == null) {
                throw new IllegalArgumentException("Unsupported type: " + node.getType());
            }

            FunctionInfo operatorInfo = metadata.getExactOperator(OperatorType.CAST, type, types(node.getExpression()));

            try {
                return invoke(session, operatorInfo.getMethodHandle(), ImmutableList.of(value));
            }
            catch (RuntimeException e) {
                if (node.isSafe()) {
                    return null;
                }
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            return any(values, instanceOf(Expression.class));
        }

        private Object invokeOperator(OperatorType operatorType, List<? extends Type> argumentTypes, List<Object> argumentValues)
        {
            FunctionInfo operatorInfo = metadata.resolveOperator(operatorType, argumentTypes);
            return invoke(session, operatorInfo.getMethodHandle(), argumentValues);
        }
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        }

        @Override
        public RowExpression visitCall(CallExpression call, final Void context)
        {
            FunctionInfo function;
            Signature signature = call.getSignature();
            switch (signature.getName()) {
                // TODO: optimize these special forms
                case IF:
                case NULL_IF:
                case SWITCH:
                case TRY_CAST:
                case IS_NULL:
                case "IS_DISTINCT_FROM":
                case COALESCE:
                case "AND":
                case "OR":
                case IN:
                    return call;
                case CAST:
                    if (call.getArguments().get(0).getType().equals(UnknownType.UNKNOWN)) {
                        return constantNull(call.getType());
                    }
                    function = registry.getCoercion(call.getArguments().get(0).getType(), call.getType());
                    break;
                default:
                    function = registry.getExactFunction(signature);
                    if (function == null) {
                        // TODO: temporary hack to deal with magic timestamp literal functions which don't have an "exact" form and need to be "resolved"
                        function = registry.resolveFunction(QualifiedName.of(signature.getName()), signature.getArgumentTypes(), false);
                    }
            }

            List<RowExpression> arguments = Lists.transform(call.getArguments(), new Function<RowExpression, RowExpression>()
            {
                @Override
                public RowExpression apply(RowExpression input)
                {
                    return input.accept(Visitor.this, context);
                }
            });

            if (Iterables.all(arguments, instanceOf(ConstantExpression.class)) && function.isDeterministic()) {
                MethodHandle method = function.getMethodHandle();

                if (method.type().parameterCount() > 0 && method.type().parameterType(0) == ConnectorSession.class) {
                    method = method.bindTo(session);
                }
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            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);
                if (masks.containsKey(entry.getKey())) {
                    intermediateMask.put(intermediateSymbol, masks.get(entry.getKey()));
                }

                // rewrite final aggregation in terms of intermediate function
                finalCalls.put(entry.getKey(), new FunctionCall(function.getName(), ImmutableList.<Expression>of(new QualifiedNameReference(intermediateSymbol.toQualifiedName()))));
            }

            // create partial aggregation plan
            AggregationNode partialAggregation = new AggregationNode(idAllocator.getNextId(), plan.getRoot(), groupBy, intermediateCalls, intermediateFunctions, intermediateMask, PARTIAL, sampleWeight, confidence);
            plan.setRoot(new SinkNode(idAllocator.getNextId(), partialAggregation, partialAggregation.getOutputSymbols()));
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        }

        Type type = arguments.get(0).getType();
        Class<?> javaType = type.getJavaType();

        FunctionInfo hashCodeFunction = generatorContext.getRegistry().resolveOperator(OperatorType.HASH_CODE, ImmutableList.of(type));

        ImmutableListMultimap.Builder<Integer, ByteCodeNode> hashBucketsBuilder = ImmutableListMultimap.builder();
        ImmutableList.Builder<ByteCodeNode> defaultBucket = ImmutableList.builder();
        ImmutableSet.Builder<Object> constantValuesBuilder = ImmutableSet.builder();

        for (RowExpression testValue : values) {
            ByteCodeNode testByteCode = generatorContext.generate(testValue);

            if (testValue instanceof ConstantExpression && ((ConstantExpression) testValue).getValue() != null) {
                ConstantExpression constant = (ConstantExpression) testValue;
                Object object = constant.getValue();
                constantValuesBuilder.add(object);

                try {
                    int hashCode = (int) hashCodeFunction.getMethodHandle().invoke(object);
                    hashBucketsBuilder.put(hashCode, testByteCode);
                }
                catch (Throwable throwable) {
                    throw new IllegalArgumentException("Error processing IN statement: error calculating hash code for " + object, throwable);
                }
            }
            else {
                defaultBucket.add(testByteCode);
            }
        }
        ImmutableListMultimap<Integer, ByteCodeNode> hashBuckets = hashBucketsBuilder.build();
        ImmutableSet<Object> constantValues = constantValuesBuilder.build();

        LabelNode end = new LabelNode("end");
        LabelNode match = new LabelNode("match");
        LabelNode noMatch = new LabelNode("noMatch");

        LabelNode defaultLabel = new LabelNode("default");

        CompilerContext context = generatorContext.getContext();

        ByteCodeNode switchBlock;
        if (constantValues.size() < 1000) {
            Block switchCaseBlocks = new Block(context);
            LookupSwitch.LookupSwitchBuilder switchBuilder = lookupSwitchBuilder();
            for (Map.Entry<Integer, Collection<ByteCodeNode>> bucket : hashBuckets.asMap().entrySet()) {
                LabelNode label = new LabelNode("inHash" + bucket.getKey());
                switchBuilder.addCase(bucket.getKey(), label);
                Collection<ByteCodeNode> testValues = bucket.getValue();

                Block caseBlock = buildInCase(generatorContext, context, type, label, match, defaultLabel, testValues, false);
                switchCaseBlocks
                        .append(caseBlock.setDescription("case " + bucket.getKey()));
            }
            switchBuilder.defaultCase(defaultLabel);

            Binding hashCodeBinding = generatorContext
                    .getCallSiteBinder()
                    .bind(hashCodeFunction.getMethodHandle());

            switchBlock = new Block(context)
                    .comment("lookupSwitch(hashCode(<stackValue>))")
                    .dup(javaType)
                    .append(invoke(generatorContext.getContext(), hashCodeBinding))
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                    .putVariable("wasNull");
        }

        elseBlock.gotoLabel(noMatchLabel);

        FunctionInfo operator = generatorContext.getRegistry().resolveOperator(OperatorType.EQUAL, ImmutableList.of(type, type));

        Binding equalsFunction = generatorContext
                .getCallSiteBinder()
                .bind(operator.getMethodHandle());

        ByteCodeNode elseNode = elseBlock;
        for (ByteCodeNode testNode : testValues) {
            LabelNode testLabel = new LabelNode("test");
            IfStatement.IfStatementBuilder test = ifStatementBuilder(context);
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                String columnName = columnHandles.get(columnHandle);
                String value = null;
                if (entry.getValue() != null) {
                    ColumnMetadata columnMetadata  = metadata.getColumnMetadata(tableHandle.get(), columnHandle);
                    try {
                        FunctionInfo operator = metadata.getExactOperator(OperatorType.CAST, VarcharType.VARCHAR, ImmutableList.of(columnMetadata.getType()));
                        value = ((Slice) operator.getMethodHandle().invokeWithArguments(entry.getValue())).toStringUtf8();
                    }
                    catch (OperatorNotFoundException e) {
                        value = "<UNREPRESENTABLE VALUE>";
                    }
                    catch (Throwable throwable) {
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