maropu commented on issue #25280: [SPARK-28548][SQL] explain() shows wrong result for persisted DataFrames after some operations URL: https://github.com/apache/spark/pull/25280#issuecomment-516201326 We cannot just return a new Dataset in persist, btw, like this? ``` val df = spark.range(10) df.explain // show query plan without cache df.collect // execution without cache val cachedDf = df.persist df.explain // show query plan without cache df.collect // execution without cache cachedDf.explain // show query plan with cache cachedDf.collect // execution with cache ```
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