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