text: -- @testpoint: opengauss关键字exists(非保留)，作为游标名，部分测试点合理报错
  
  --前置条件
  drop table if exists exists_test cascade;
  create table exists_test(cid int,fid int);
  
  --关键字不带引号-成功
  start transaction;
  cursor exists for select * from exists_test order by 1;
  close exists;
  end;
  
  --关键字带双引号-成功
  start transaction;
  cursor "exists" for select * from exists_test order by 1;
  close "exists";
  end;
  
  --关键字带单引号-合理报错
  start transaction;
  cursor 'exists' for select * from exists_test order by 1;
  close 'exists';
  end;
  
  --关键字带反引号-合理报错
  start transaction;
  cursor `exists` for select * from exists_test order by 1;
  close `exists`;
  end;
  drop table if exists exists_test cascade;