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