text: #include <Common/typeid_cast.h>
  #include <Common/Exception.h>
  
  #include <Core/Block.h>
  #include <Storages/StorageValues.h>
  #include <DataTypes/DataTypeTuple.h>
  
  #include <Parsers/ASTExpressionList.h>
  #include <Parsers/ASTLiteral.h>
  #include <Parsers/ASTFunction.h>
  
  #include <TableFunctions/ITableFunction.h>
  #include <TableFunctions/TableFunctionValues.h>
  #include <TableFunctions/TableFunctionFactory.h>
  #include <TableFunctions/parseColumnsListForTableFunction.h>
  
  #include <Interpreters/convertFieldToType.h>
  #include <Interpreters/evaluateConstantExpression.h>
  
  
  namespace DB
  {
  
  namespace ErrorCodes
  {
      extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
  }
  
  static void parseAndInsertValues(MutableColumns & res_columns, const ASTs & args, const Block & sample_block, const Context & context)
  {
      if (res_columns.size() == 1) /// Parsing arguments as Fields
      {
          for (size_t i = 1; i < args.size(); ++i)
          {
              const auto & [value_field, value_type_ptr] = evaluateConstantExpression(args[i], context);
  
              Field value = convertFieldToType(value_field, *sample_block.getByPosition(0).type, value_type_ptr.get());
              res_columns[0]->insert(value);
          }
      }
      else /// Parsing arguments as Tuples
      {
          for (size_t i = 1; i < args.size(); ++i)
          {
              const auto & [value_field, value_type_ptr] = evaluateConstantExpression(args[i], context);
              const DataTypes & value_types_tuple = typeid_cast<const DataTypeTuple *>(value_type_ptr.get())->getElements();
              const Tuple & value_tuple = value_field.safeGet<Tuple>();
  
              if (value_tuple.size() != sample_block.columns())
                  throw Exception("Values size should match with number of columns", ErrorCodes::LOGICAL_ERROR);
  
              for (size_t j = 0; j < value_tuple.size(); ++j)
              {
                  Field value = convertFieldToType(value_tuple[j], *sample_block.getByPosition(j).type, value_types_tuple[j].get());
                  res_columns[j]->insert(value);
              }
          }
      }
  }
  
  StoragePtr TableFunctionValues::executeImpl(const ASTPtr & ast_function, const Context & context, const std::string & table_name) const
  {
      ASTs & args_func = ast_function->children;
  
      if (args_func.size() != 1)
          throw Exception("Table function '" + getName() + "' must have arguments.", ErrorCodes::LOGICAL_ERROR);
  
      ASTs & args = args_func.at(0)->children;
  
      if (args.size() < 2)
          throw Exception("Table function '" + getName() + "' requires 2 or more arguments: structure and values.",
                          ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
  
      /// Parsing first argument as table structure and creating a sample block
      std::string structure = args[0]->as<ASTLiteral &>().value.safeGet<String>();
  
      ColumnsDescription columns = parseColumnsListFromString(structure, context);
  
      Block sample_block;
      for (const auto & name_type : columns.getOrdinary())
          sample_block.insert({ name_type.type->createColumn(), name_type.type, name_type.name });
  
      MutableColumns res_columns = sample_block.cloneEmptyColumns();
  
      /// Parsing other arguments as values and inserting them into columns
      parseAndInsertValues(res_columns, args, sample_block, context);
  
      Block res_block = sample_block.cloneWithColumns(std::move(res_columns));
  
      auto res = StorageValues::create(getDatabaseName(), table_name, columns, res_block);
      res->startup();
      return res;
  }
  
  void registerTableFunctionValues(TableFunctionFactory & factory)
  {
      factory.registerFunction<TableFunctionValues>(TableFunctionFactory::CaseInsensitive);
  }
  
  }
  