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