Github user concretevitamin commented on the pull request: https://github.com/apache/spark/pull/948#issuecomment-45026360 Removing duplication is definitely a good thing. The other benefit is that it seems more natural to me to push such DDL/command processing logic into QueryExecution, instead of putting them into two thin entry methods (`sql` and `hql`). I am super new to Spark SQL so bear with me if this is silly -- what is the reason we don't do this as well for `InsertIntoHiveTable` and `InsertIntoParquetTable`?
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