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From cloud-fan <>
Subject [GitHub] spark pull request: [SPARK-13853][SQL] QueryPlan sub-classes shoul...
Date Thu, 17 Mar 2016 09:48:23 GMT
Github user cloud-fan commented on the pull request:
    hi @marmbrus , yes your idea makes sense, we should use `Alias` to produce new attributes
if we can. Except leaf nodes, there are some special cases we still need to use `producedAttributes`:
`Generate`, `Expand`, `ScriptTransform` and aggregate related operators. In this PR, I made
`EvaluatePython` to use alias for new attribute, and clean up those special cases to use `producedAttributes`.

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