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