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