Jingsong Lee created FLINK-28264:
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             Summary: Refactor split and read in table store
                 Key: FLINK-28264
                 URL: https://issues.apache.org/jira/browse/FLINK-28264
             Project: Flink
          Issue Type: Improvement
          Components: Table Store
            Reporter: Jingsong Lee
            Assignee: Jingsong Lee
             Fix For: table-store-0.2.0


Refactor split and read, for better Hybrid reading. The full and incremental 
read paths should be different, otherwise it is easy to get bugs.

* Add boolean isIncremental to Split
* Use Split in Flink Source Split and Hive Split
* FileStoreRead.createReader(Split)
* Create ConcatRecordReader or MergeTreeReader by Split.isIncremental
* Do key projection in KeyValueFileStoreRead.createReader



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