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From hvanhovell <...@git.apache.org>
Subject [GitHub] spark pull request #14355: [SPARK-16726][SQL] Improve `Union/Intersect/Excep...
Date Wed, 27 Jul 2016 14:41:12 GMT
Github user hvanhovell commented on a diff in the pull request:

    https://github.com/apache/spark/pull/14355#discussion_r72452143
  
    --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
---
    @@ -280,6 +267,37 @@ trait CheckAnalysis extends PredicateHelper {
               case p if p.expressions.exists(PredicateSubquery.hasPredicateSubquery) =>
                 failAnalysis(s"Predicate sub-queries can only be used in a Filter: $p")
     
    +          case _: Union | _: SetOperation =>
    +            if (operator.children.length > 1) {
    --- End diff --
    
    Put the If in the guard.


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