[GitHub] xuchuanyin edited a comment on issue #3062: [CARBONDATA-3241] Refactor the requested scan columns and the projection columns

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xuchuanyin edited a comment on issue #3062: [CARBONDATA-3241] Refactor the requested scan columns and the projection columns
URL: https://github.com/apache/carbondata/pull/3062#issuecomment-453840657
 
 
   Why is this refactor needed?
   

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