SqlState = 42000，OleDB 在read committed或repeatale read隔离级别上只能指定readpast锁

在 READ COMMITTED 或 REPEATABLE READ 隔离级别上只能指定 READPAST 锁。
select cast(max( modifyts ) as binary(8)) as Modifyts from B_customer with(readpast)

奇怪：使用nolock锁不出错，readpast锁反而出错了。