viirya commented on issue #24960: [SPARK-28156][SQL] Self-join should not miss cached view URL: https://github.com/apache/spark/pull/24960#issuecomment-507313262 It sounds not safe but I did try it locally. A rule, e.g., `SubqueryAlias`, needs to transform children of `View`. Making it as leaf node can bring unexpected error, if we forget to take care `View` in a rule like that.
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