jackylk commented on issue #3483: [CARBONDATA-3597] Support Merge for SCD and CCD scenarios URL: https://github.com/apache/carbondata/pull/3483#issuecomment-559716902 Good, still have following doubts: 1. If the target table has 100 columns, is there a simpler way to specify what to insert? instead of giving a map by user? 2. I see the benchmark example, it has only 2 million rows but 600 columns, so it is a very wide table. What will the performance look like for a thin and tall table? 3. For the parquet and carbon comparison, what is the performance gain come from. Is the performance gain only because 1 join is avoided?
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