dictGet('name', ...) should check for XML dictionary 'name' if XML dict=name does not exists then use SQL dictionary from the currectDatabase()

ColumnNumbers getArgumentsThatAreAlwaysConstant() const final { return {0}; }
    DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
    {
        if (!isString(arguments[0]))
            throw Exception{"Illegal type " + arguments[0]->getName() + " of first argument of function " + getName()
                + ", expected a string.", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT};
        if (!WhichDataType(arguments[1]).isUInt64())
            throw Exception{"Illegal type " + arguments[1]->getName() + " of second argument of function " + getName()
                + ", must be UInt64.", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT};
        if (!WhichDataType(arguments[2]).isUInt64())
            throw Exception{"Illegal type " + arguments[2]->getName() + " of third argument of function " + getName()
                + ", must be UInt64.", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT};
        return std::make_shared<DataTypeUInt8>();
    }
    bool isDeterministic() const override { return false; }
    ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & result_type, size_t input_rows_count) const override
    {
        if (input_rows_count == 0)
            return result_type->createColumn();
        auto dict = helper.getDictionary(arguments[0]);
        ColumnPtr res;
        if (!((res = executeDispatch<FlatDictionary>(arguments, dict))
            || (res = executeDispatch<DirectDictionary<DictionaryKeyType::simple>>(arguments, dict))
            || (res = executeDispatch<HashedDictionary>(arguments, dict))
            || (res = executeDispatch<CacheDictionary<DictionaryKeyType::simple>>(arguments, dict))))
            throw Exception{"Unsupported dictionary type " + dict->getTypeName(), ErrorCodes::UNKNOWN_TYPE};
        return res;
    }
    template <typename DictionaryType>
    ColumnPtr executeDispatch(const ColumnsWithTypeAndName & arguments, const std::shared_ptr<const IDictionaryBase> & dict_ptr) const