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