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From viirya <>
Subject [GitHub] spark pull request #18779: [SPARK-21580][SQL]There's a bug with `Group by or...
Date Mon, 31 Jul 2017 05:06:30 GMT
Github user viirya commented on a diff in the pull request:
    --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
    @@ -1010,7 +1014,16 @@ class Analyzer(
                     s"(valid range is [1, ${aggs.size}])")
               case o => o
    -        Aggregate(newGroups, aggs, child)
    +        var filterGroups: Seq[Expression] = Nil
    --- End diff --
    Please leave a comment explaining why we need to filter the group-by exprs.

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