danielcweeks commented on issue #24991: SPARK-28188 Materialize Dataframe API URL: https://github.com/apache/spark/pull/24991#issuecomment-507371151 @srowen I think the point here is to provide an explicit way of materializing data so that it can be reused in later stages as opposed to relying on side-effects of operations that produce the same result. This is a really common issue, so having a clear expression of the intent really helps to disambiguate the logic.
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