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