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From viirya <>
Subject [GitHub] spark issue #19216: [SPARK-21990][SQL] QueryPlanConstraints misses some cons...
Date Thu, 14 Sep 2017 08:36:08 GMT
Github user viirya commented on the issue:
    I'm thinking more about this.
    Actually I think we shouldn't rely on an optimization rule to produce correct constraints.
If there is a logical plan other than `Filter` that can get its material of constraints from
outside (maybe data source or others) in the future, we won't infer the correct constraints.
    But currently looks like it doesn't cause any trouble.


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