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