haj8888888 removed a comment on issue #2391: After using the sharding-proxy 
sub-table to sub-table, use the PageHelper plug-in to query one-to-many data, 
and the number of returned records is incorrect.
URL: 
https://github.com/apache/incubator-shardingsphere/issues/2391#issuecomment-492915210
 
 
   > sql.show = true
   Return result:
   [DEBUG] 2019-05-15 18:27:44,559 --main-- 
[com.mec.dao.OrderDao.selectByJoin_COUNT] ==> Preparing: SELECT count() FROM 
t_order t JOIN t_order_item ti ON t.order_id = ti.order_id
   [DEBUG] 2019-05-15 18:27:44,617 --main-- 
[com.mec.dao.OrderDao.selectByJoin_COUNT] ==> Parameters:
   [DEBUG] 2019-05-15 18:27:44,634 --main-- 
[com.mec.dao.OrderDao.selectByJoin_COUNT] <== Total: 1
   [DEBUG] 2019-05-15 18:27:44,636 --main-- [com.mec.dao.OrderDao.selectByJoin] 
==> Preparing: SELECT t., ti.order_item_id as a_order_item_id, ti.order_id as 
a_order_id, ti.user_id as a_user_id, ti.status as a_status FROM t_order t JOIN 
t_order_item ti ON t.order_id = ti.order_id limit ?,?
   [DEBUG] 2019-05-15 18:27:44,642 --main-- [com.mec.dao.OrderDao.selectByJoin] 
==> Parameters: 0(Integer), 2(Integer)
   [DEBUG] 2019-05-15 18:27:44,649 --main-- [com.mec.dao.OrderDao.selectByJoin] 
<== Total: 2
   [INFO ] 2019-05-15 18:27:44,651 --main-- 
[com.mec.order.test.ShardingProxyMybatisTest] Order{orderId=1557913094808, 
userId=688, status='ON', orderItemList=[OrderItem{orderItemId=1557913094807, 
orderId=1557913094808, userId=688, status='OFF'}, 
OrderItem{orderItemId=1557913094808, orderId=1557913094808, userId=688, 
status='ON'}]}
   

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