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