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