text: #include <Functions/IFunction.h>
  #include <Functions/FunctionFactory.h>
  #include <Functions/FunctionHelpers.h>
  #include <Columns/ColumnString.h>
  #include <Columns/ColumnsNumber.h>
  #include <Columns/ColumnsCommon.h>
  #include <DataTypes/DataTypesNumber.h>
  #include <IO/WriteHelpers.h>
  
  
  namespace DB
  {
  namespace ErrorCodes
  {
      extern const int ILLEGAL_COLUMN;
      extern const int ILLEGAL_TYPE_OF_ARGUMENT;
      extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
      extern const int FUNCTION_THROW_IF_VALUE_IS_NON_ZERO;
  }
  
  namespace
  {
  
  /// Throw an exception if the argument is non zero.
  class FunctionThrowIf : public IFunction
  {
  public:
      static constexpr auto name = "throwIf";
      static FunctionPtr create(ContextPtr)
      {
          return std::make_shared<FunctionThrowIf>();
      }
  
      String getName() const override
      {
          return name;
      }
  
      bool isVariadic() const override { return true; }
      bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
      size_t getNumberOfArguments() const override
      {
          return 0;
      }
  
      DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
      {
          const size_t number_of_arguments = arguments.size();
  
          if (number_of_arguments < 1 || number_of_arguments > 2)
              throw Exception{"Number of arguments for function " + getName() + " doesn't match: passed "
                              + toString(number_of_arguments) + ", should be 1 or 2",
                              ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH};
  
          if (!isNativeNumber(arguments[0]))
              throw Exception{"Argument for function " + getName() + " must be number", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT};
  
          if (number_of_arguments > 1 && !isString(arguments[1]))
              throw Exception{"Illegal type " + arguments[1]->getName() + " of argument of function " + getName(),
                              ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT};
  
  
          return std::make_shared<DataTypeUInt8>();
      }
  
      bool useDefaultImplementationForConstants() const override { return true; }
      ColumnNumbers getArgumentsThatAreAlwaysConstant() const override { return {1}; }
  
      ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t /*input_rows_count*/) const override
      {
          std::optional<String> custom_message;
          if (arguments.size() == 2)
          {
              const auto * msg_column = checkAndGetColumnConst<ColumnString>(arguments[1].column.get());
              if (!msg_column)
                  throw Exception{"Second argument for function " + getName() + " must be constant String", ErrorCodes::ILLEGAL_COLUMN};
              custom_message = msg_column->getValue<String>();
          }
  
          const auto * in = arguments.front().column.get();
  
          ColumnPtr res;
          if (!((res = execute<UInt8>(in, custom_message))
              || (res = execute<UInt16>(in, custom_message))
              || (res = execute<UInt32>(in, custom_message))
              || (res = execute<UInt64>(in, custom_message))
              || (res = execute<Int8>(in, custom_message))
              || (res = execute<Int16>(in, custom_message))
              || (res = execute<Int32>(in, custom_message))
              || (res = execute<Int64>(in, custom_message))
              || (res = execute<Float32>(in, custom_message))
              || (res = execute<Float64>(in, custom_message))))
              throw Exception{"Illegal column " + in->getName() + " of first argument of function " + getName(), ErrorCodes::ILLEGAL_COLUMN};
  
          return res;
      }
  
      template <typename T>
      ColumnPtr execute(const IColumn * in_untyped, const std::optional<String> & message) const
      {
          if (const auto in = checkAndGetColumn<ColumnVector<T>>(in_untyped))
          {
              const auto & in_data = in->getData();
              if (!memoryIsZero(in_data.data(), in_data.size() * sizeof(in_data[0])))
                  throw Exception{message.value_or("Value passed to '" + getName() + "' function is non zero"),
                                  ErrorCodes::FUNCTION_THROW_IF_VALUE_IS_NON_ZERO};
  
              /// We return non constant to avoid constant folding.
              return  ColumnUInt8::create(in_data.size(), 0);
          }
  
          return nullptr;
      }
  };
  
  }
  
  void registerFunctionThrowIf(FunctionFactory & factory)
  {
      factory.registerFunction<FunctionThrowIf>();
  }
  
  }
  