text: -- @testpoint: opengauss关键字cobol(非保留)，作为同义词对象名，部分测试点合理报错
  --前置条件
  drop table if exists cobol_test;
  create table cobol_test(id int,name varchar(10));
  
  --关键字不带引号-成功
  drop synonym if exists cobol;
  create synonym cobol for cobol_test;
  insert into cobol values (1,'ada'),(2, 'bob');
  update cobol set cobol.name='cici' where cobol.id=2;
  select * from cobol;
  
  --清理环境
  drop synonym if exists cobol;
  
  --关键字带双引号-成功
  drop synonym if exists "cobol";
  create synonym "cobol" for cobol_test;
  insert into "cobol" values (1,'ada'),(2, 'bob');
  update "cobol" set "cobol".name='cici' where "cobol".id=2;
  select * from "cobol";
  
  --清理环境
  drop synonym if exists "cobol";
  
  --关键字带单引号-合理报错
  drop synonym if exists 'cobol';
  
  --关键字带反引号-合理报错
  drop synonym if exists `cobol`;
  drop table if exists cobol_test;