JingsongLi commented on pull request #18:
URL: https://github.com/apache/flink-table-store/pull/18#issuecomment-1038560412


   If we provide projection on keys:
   - Does `DeduplicateAccumulator` work? Should we check it?
   - `a,b,c` -> `a,b`: Does `SortMergeReader` work? Since one file iterator 
will produce more than one records per key.
   - `a,b,c` -> `b,c`: Does `SortMergeReader` work? Since it uses 
`PriorityQueue`?


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