hanyuzheng7 commented on PR #22834:
URL: https://github.com/apache/flink/pull/22834#issuecomment-1621939482

   @snuyanzin if third optional,  can you tell me the specific function 
behavior at this time?
   ```
   array_slice(ARRAY[1,2,3] , -3) -> [1,2,3] 
   array_slice(ARRAY[1,2,3] , 1) -> [1]
   and array_slice(ARRAY[1,2,3], 4) -> []
   
   ```
   
   whether the result like what I show above?


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