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