text: --  @testpoint:opengauss关键字Key(非保留)，作为用户组名
  
  
  --关键字不带引号-成功
  drop group if exists Key;
  create group Key with password 'Gauss@123';
  drop group Key;
  
  --关键字带双引号-成功
  drop group if exists "Key";
  create group "Key" with password 'Gauss@123';
  drop group "Key";
  
  --关键字带单引号-合理报错
  drop group if exists 'Key';
  create group 'Key' with password 'Gauss@123';
  
  --关键字带反引号-合理报错
  drop group if exists `Key`;
  create group `Key` with password 'Gauss@123';
  