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