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