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From chenghao-intel <>
Subject [GitHub] spark pull request: [WIP][Spark-SQL] Optimize the Constant Folding...
Date Mon, 28 Apr 2014 08:36:37 GMT
Github user chenghao-intel commented on the pull request:
    Thank you @marmbrus , I've updated the code a little bit.
    I've created another rule "NullPropagation", and it transforms the tree from bottom to
top, and keep unchanged for the rule constant folding.

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