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Posted to notifications@shardingsphere.apache.org by "sandynz (via GitHub)" <gi...@apache.org> on 2023/03/16 12:25:57 UTC

[GitHub] [shardingsphere] sandynz opened a new issue, #24655: Select from sub-query return records more than limited count on proxy

sandynz opened a new issue, #24655:
URL: https://github.com/apache/shardingsphere/issues/24655

   ## Bug Report
   
   ### Which version of ShardingSphere did you use?
   master branch
   
   ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
   Proxy
   
   ### Expected behavior
   Return rows as limited count
   
   ### Actual behavior
   
   In proxy:
   ```
   mysql> select * from (select order_id,user_id from t_order limit 1) t;
   +----------+---------+
   | order_id | user_id |
   +----------+---------+
   |      337 |       0 |
   |       54 |       3 |
   |       90 |       1 |
   |      166 |       4 |
   |       80 |       2 |
   |       14 |       5 |
   +----------+---------+
   6 rows in set (0.02 sec)
   
   mysql> select order_id,user_id from t_order limit 1;
   +----------+---------+
   | order_id | user_id |
   +----------+---------+
   |      337 |       0 |
   +----------+---------+
   1 row in set (0.01 sec)
   
   mysql> show sharding table nodes t_order;
   +---------+------------------------------------------------------------------------------------------------+
   | name    | nodes                                                                                          |
   +---------+------------------------------------------------------------------------------------------------+
   | t_order | ds_2.t_order_0, ds_3.t_order_1, ds_4.t_order_2, ds_2.t_order_3, ds_3.t_order_4, ds_4.t_order_5 |
   +---------+------------------------------------------------------------------------------------------------+
   1 row in set (0.07 sec)
   ```
   
   Actual SQL:
   ```
   [INFO ] 2023-03-16 20:18:04.467 [ShardingSphere-Command-14] ShardingSphere-SQL - Logic SQL: select * from (select order_id,user_id from t_order limit 1) t
   [INFO ] 2023-03-16 20:18:04.467 [ShardingSphere-Command-14] ShardingSphere-SQL - Actual SQL: ds_2 ::: select `t`.`order_id`, `t`.`user_id` from (select order_id,user_id from t_order_0 limit 1) t
   [INFO ] 2023-03-16 20:18:04.467 [ShardingSphere-Command-14] ShardingSphere-SQL - Actual SQL: ds_2 ::: select `t`.`order_id`, `t`.`user_id` from (select order_id,user_id from t_order_3 limit 1) t
   [INFO ] 2023-03-16 20:18:04.467 [ShardingSphere-Command-14] ShardingSphere-SQL - Actual SQL: ds_3 ::: select `t`.`order_id`, `t`.`user_id` from (select order_id,user_id from t_order_1 limit 1) t
   [INFO ] 2023-03-16 20:18:04.467 [ShardingSphere-Command-14] ShardingSphere-SQL - Actual SQL: ds_3 ::: select `t`.`order_id`, `t`.`user_id` from (select order_id,user_id from t_order_4 limit 1) t
   [INFO ] 2023-03-16 20:18:04.467 [ShardingSphere-Command-14] ShardingSphere-SQL - Actual SQL: ds_4 ::: select `t`.`order_id`, `t`.`user_id` from (select order_id,user_id from t_order_2 limit 1) t
   [INFO ] 2023-03-16 20:18:04.467 [ShardingSphere-Command-14] ShardingSphere-SQL - Actual SQL: ds_4 ::: select `t`.`order_id`, `t`.`user_id` from (select order_id,user_id from t_order_5 limit 1) t
   ```
   
   ### Reason analyze (If you can)
   
   ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc.
   
   ### Example codes for reproduce this issue (such as a github link).
   


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[GitHub] [shardingsphere] sandynz commented on issue #24655: Select from sub-query return records more than limited count on proxy

Posted by "sandynz (via GitHub)" <gi...@apache.org>.
sandynz commented on issue #24655:
URL: https://github.com/apache/shardingsphere/issues/24655#issuecomment-1473000104

   Set `sql-federation-type: ADVANCED` in `server.yaml` to support it.
   
   ```
   mysql> select * from (select order_id,user_id from t_order order by order_id desc limit 1) t;
   +----------+---------+
   | order_id | user_id |
   +----------+---------+
   |    10000 |       1 |
   +----------+---------+
   1 row in set (0.38 sec)
   
   mysql> select order_id,user_id from t_order order by order_id desc limit 1;
   +----------+---------+
   | order_id | user_id |
   +----------+---------+
   |    10000 |       1 |
   +----------+---------+
   1 row in set (0.04 sec)
   ```
   


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[GitHub] [shardingsphere] sandynz closed issue #24655: Select from sub-query return records more than limited count on proxy

Posted by "sandynz (via GitHub)" <gi...@apache.org>.
sandynz closed issue #24655: Select from sub-query return records more than limited count on proxy
URL: https://github.com/apache/shardingsphere/issues/24655


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