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