hililiwei commented on PR #5061:
URL: https://github.com/apache/iceberg/pull/5061#issuecomment-1170812806

   @kbendick When I remove the `UNIQUE`, it's going to show up the same way. 
   But aone thing, when I use temporal Join, I have to have a primary key field.
   >Also, can you provide the intermediate result set for the LEFT JOIN and 
then the final result of upsert_test (the target table that records are being 
inserted into?
   When I run left Join in Flink SQL, its result set is:
   ```
   id                      data
    1                  20220607
    3                  20220505
   ```
   It's the same as @Reo-LEI 
   
   
   
   
   
   
   
   
   


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