text: #include <Parsers/ASTSelectWithUnionQuery.h>
  #include <Parsers/ASTSelectQuery.h>
  #include <Common/typeid_cast.h>
  
  
  namespace DB
  {
  
  ASTPtr ASTSelectWithUnionQuery::clone() const
  {
      auto res = std::make_shared<ASTSelectWithUnionQuery>(*this);
      res->children.clear();
  
      res->list_of_selects = list_of_selects->clone();
      res->children.push_back(res->list_of_selects);
  
      cloneOutputOptions(*res);
      return res;
  }
  
  
  void ASTSelectWithUnionQuery::formatQueryImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const
  {
      std::string indent_str = settings.one_line ? "" : std::string(4 * frame.indent, ' ');
  
      for (ASTs::const_iterator it = list_of_selects->children.begin(); it != list_of_selects->children.end(); ++it)
      {
          if (it != list_of_selects->children.begin())
              settings.ostr
                  << settings.nl_or_ws << indent_str << (settings.hilite ? hilite_keyword : "")
                  << "UNION ALL" << (settings.hilite ? hilite_keyword : "")
                  << settings.nl_or_ws;
  
          (*it)->formatImpl(settings, state, frame);
      }
  }
  
  
  void ASTSelectWithUnionQuery::setDatabaseIfNeeded(const String & database_name)
  {
      for (auto & child : list_of_selects->children)
          typeid_cast<ASTSelectQuery &>(*child).setDatabaseIfNeeded(database_name);
  }
  
  }
  