Yaohua628 commented on PR #38683: URL: https://github.com/apache/spark/pull/38683#issuecomment-1319636434
> If it has been persisted before (like a table), then it's totally fine to write non-nullable data to a nullable column. The optimizer may also optimize a column from nullable to non-nullable, so this will happen from time to time. Got it, that makes sense! Updated -- 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. To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org 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
