不好意思，您的提示是正确的，谢谢🙏。
我使用的这个方式创建了用户：
CREATE USER demo IDENTIFIED BY '123456';
并未授予其 tpcc 数据库建表等权限。
按提示，一直理解为连接问题了 
。
授予权限后，可以正常测试了！
GRANT ALL ON tpcc* TO 'demo';
load to order_line in warehouse 1 district 10
begin to check warehouse 1 at condition 3.3.2.1
begin to check warehouse 1 at condition 3.3.2.2
begin to check warehouse 1 at condition 3.3.2.3
begin to check warehouse 1 at condition 3.3.2.6
begin to check warehouse 1 at condition 3.3.2.9
begin to check warehouse 1 at condition 3.3.2.11
begin to check warehouse 1 at condition 3.3.2.4
begin to check warehouse 1 at condition 3.3.2.5
begin to check warehouse 1 at condition 3.3.2.7
begin to check warehouse 1 at condition 3.3.2.8
begin to check warehouse 1 at condition 3.3.2.10
begin to check warehouse 1 at condition 3.3.2.12
Finished