text: --  @testpoint:opengauss关键字breadth(非保留)，作为用户组名
  --关键字不带引号-成功
  drop group if exists breadth;
  create group breadth with password 'gauss@123';
  drop group breadth;
  
  --关键字带双引号-成功
  drop group if exists "breadth";
  create group "breadth" with password 'gauss@123';
  drop group "breadth";
  
  --关键字带单引号-合理报错
  drop group if exists 'breadth';
  
  --关键字带反引号-合理报错
  drop group if exists `breadth`;
  