viirya edited a comment on pull request #28996: URL: https://github.com/apache/spark/pull/28996#issuecomment-654004956
> > To do a SQL-style set union (that does deduplication of elements), use this function followed by a [[distinct]]. Read with the previous sentence, I think the doc means that this API doesn't deduplicate elements. The doc explains that this API resolves columns by name, not by position like `union`. This config doesn't change the behavior. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
