[GitHub] [shardingsphere] mlkui opened a new issue #10724: The merge method of ShardingDQLResultMerger will throw exception when queryResults.size()==0

[GitBox <gi...@apache.org>]

mlkui opened a new issue #10724:
URL: https://github.com/apache/shardingsphere/issues/10724


   ### Which version of ShardingSphere did you use?
   Current master branch, commit id: gd4d1ca2522
   
   ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
   ShardingSphere-JDBC
   
   ### Expected behavior
   Show explicit error message.
   
   ### Actual behavior
   Unchecked IndexOutOfBoundsException expection is thrown.
   
   ### Reason analyze (If you can)
   The merge method of ShardingDQLResultMerger should not be invoked at all. 
   
   ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc.
   1. SELECT * FROM phycial_table_not_exist_in_the_phycial_database
   2. You will get java.lang.IndexOutOfBoundsException: Index:0, Size:0  
   
   ### Example codes for reproduce this issue (such as a github link).
   


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[GitHub] [shardingsphere] tristaZero closed issue #10724: The merge method of ShardingDQLResultMerger will throw exception when queryResults.size()==0

[GitBox <gi...@apache.org>]

tristaZero closed issue #10724:
URL: https://github.com/apache/shardingsphere/issues/10724


   


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[GitHub] [shardingsphere] strongduanmu commented on issue #10724: The merge method of ShardingDQLResultMerger will throw exception when queryResults.size()==0

[GitBox <gi...@apache.org>]

strongduanmu commented on issue #10724:
URL: https://github.com/apache/shardingsphere/issues/10724#issuecomment-857582933


   I used `sharding` table and `single` table to test, and the exceptions you reported were not reproduced, but appropriate exceptions were thrown.
   
   ```
   mysql> select * from t_order_item_test;
   ERROR 1999 (C1999): Unknown exception: [`t_order_item_test` single table does not exist.]
   
   mysql> select * from t_order_item;
   ERROR 1146 (42S02): Table 'demo_ds_0.t_order_item_0' doesn't exist
   ```


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