QiangCai opened a new pull request #4097:
URL: https://github.com/apache/carbondata/pull/4097

    ### Why is this PR needed?
    1.  in spark version 3, org.apache.spark.sql.sources.Filter is sealed
    2.  CarbonLateDecodeStrategy class's name is incorrect
    3.  CarbonDataSourceScan should be the same for 2.3 and 2.4
    ### What changes were proposed in this PR?
   1. translate spark Expression to carbon Expression directly, skip spark 
Filter step.  Remove all spark Filter in carbon code.
   2. separate CarbonLateDecodeStrategy to CarbonSourceStrategy and 
DMLStrategy, and simplify the code of CarbonSourceStrategy
   3.  move CarbonDataSourceScan back to the source folder
    ### Does this PR introduce any user interface change?
    - No
    ### Is any new testcase added?
    - No

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