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