text: --  @testpoint:opengauss关键字version(非保留)，作为角色名
  
  
  --关键字不带引号-成功
  drop role if exists version;
  create role version with password 'gauss@123' valid until '2020-12-31';
  drop role version;
  
  --关键字带双引号-成功
  drop role if exists "version";
  create role "version" with password 'gauss@123' valid until '2020-12-31';
  drop role "version";
  
  --关键字带单引号-合理报错
  drop role if exists 'version';
  create role 'version' with password 'gauss@123' valid until '2020-12-31';
  
  --关键字带反引号-合理报错
  drop role if exists `version`;
  create role `version` with password 'gauss@123' valid until '2020-12-31';
  