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