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