viirya commented on issue #24960: [SPARK-28156][SQL] Self-join should not miss cached view URL: https://github.com/apache/spark/pull/24960#issuecomment-506663588 I read `QueryPlan.doCanonicalize` and rethink project canonicalization. I'm wondering if we can drop a project node like that, safely. For an intermediate project node, looks like it causes some problems in canonicalization of above nodes on it.
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