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