rdblue commented on issue #24117: [SPARK-27181][SQL]: Add public transform API (WIP) URL: https://github.com/apache/spark/pull/24117#issuecomment-473603204 @rxin, @cloud-fan, please have a look at aa3af012b6689f587598014fca92c320f8f1acc1 in this PR. This adds a public expressions API for passing partition transforms. This is needed for the table catalog API. This is what Reynold and I had roughly agreed on the last time we discussed it. The API is a Java API with internal case classes for Spark to use. When transforms are passed to Spark, they must be produced by `Transforms` so Spark recognizes them.
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