text: --  @testpoint:opengauss关键字cube(非保留)，作为序列名
  
  
  --关键字不带引号-成功
  drop sequence if exists cube;
  create sequence cube start 100 cache 50;
  drop sequence cube;
  
  --关键字带双引号-成功
  drop sequence if exists "cube";
  create sequence "cube" start 100 cache 50;
  drop sequence "cube";
  
  --关键字带单引号-合理报错
  drop sequence if exists 'cube';
  create sequence 'cube' start 100 cache 50;
  
  --关键字带反引号-合理报错
  drop sequence if exists `cube`;
  create sequence `cube` start 100 cache 50;
  