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From: julianhyde <git@git.apache.org>
To: dev@drill.apache.org
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Subject: [GitHub] drill pull request: DRILL-1457: Push Limit past through
 UnionExcha...
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Message-Id: <20150925161257.0BD21E01E0@git1-us-west.apache.org>
Date: Fri, 25 Sep 2015 16:12:57 +0000 (UTC)

Github user julianhyde commented on a diff in the pull request:

    https://github.com/apache/drill/pull/169#discussion_r40446899
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/planner/common/DrillLimitRelBase.java ---
    @@ -36,11 +36,17 @@
     public abstract class DrillLimitRelBase extends SingleRel implements DrillRelNode {
       protected RexNode offset;
       protected RexNode fetch;
    +  private boolean pushDown;  // whether limit has been push past its child.
    --- End diff --
    
    Actually sort and aggregate have some of this behavior too. You can do a partial sort or partial aggregate in the children but then you need to combine.


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