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