mgaido91 commented on issue #23285: [SPARK-26224][SQL] Warn and advice the user when creating many project on subsequent calls to withColumn URL: https://github.com/apache/spark/pull/23285#issuecomment-447914627 I have updated the PR with the WARN approach. I can make the threshold configurable if we agree on this. WDYT @cloud-fan @HeartSaVioR @viirya ?
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