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From "Reynold Xin (JIRA)" <>
Subject [jira] [Closed] (SPARK-12505) Pushdown a Limit on top of an Outer-Join
Date Tue, 12 Jan 2016 01:58:40 GMT


Reynold Xin closed SPARK-12505.
          Resolution: Later
            Assignee:     (was: Apache Spark)
    Target Version/s:   (was: 2.0.0)

Let's close the limit push down pull requests. We will need to design this more properly because
it is expensive to push down large limits.

> Pushdown a Limit on top of an Outer-Join
> ----------------------------------------
>                 Key: SPARK-12505
>                 URL:
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 1.5.0, 1.6.0
>            Reporter: Xiao Li
> "Rule that applies to a Limit on top of an OUTER Join. The original Limit won't go away
after applying this rule, but additional Limit node(s) will be created on top of the outer-side
child (or children if it's a FULL OUTER Join). "
> – from

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