xuejmnet opened a new issue, #25414:
URL: https://github.com/apache/shardingsphere/issues/25414

   ## Question
   
   why use `isSameGroupByAndOrderByItems` in `SelectStatementContext` 
,`isStartsWithGroupByInOrderByItems`  more appropriate
   
   i think sharding group merger only match startsWith 
   eg. 
   ```sql
   select a,b,count(id) idCount from table group a,b order by a,b
   select a,b,count(id) idCount from table group a,b order by a,b,idCount
   ```
   


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