Kent Yao created SPARK-34192:
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             Summary: Move char padding to write side
                 Key: SPARK-34192
                 URL: https://issues.apache.org/jira/browse/SPARK-34192
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.1.0
            Reporter: Kent Yao


On the read side, the char length check and padding bring issues to CBO and PPD 
and other issues to the catalyst.

It's more reasonable to do it on the write side,  as Spark doesn't take fully 
control of the storage layer.



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