[GitHub] spark pull request #20381: [MINOR][SQL]add new unit test to LimitPushdown

[heary-cao]

GitHub user heary-cao opened a pull request:

    https://github.com/apache/spark/pull/20381

    [MINOR][SQL]add new unit test to LimitPushdown

    ## What changes were proposed in this pull request?
    
    This PR is repaired as follows
    1、update y -> x in "left outer join" test case ,maybe is mistake.
    2、add a new test case："left outer join and left sides are limited"
    3、add a new test case："left outer join and right sides are limited"
    4、add a new test case: "right outer join and right sides are limited"
    5、add a new test case: "right outer join and left sides are limited"
    
    ## How was this patch tested?
    
    add new unit test case.


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/heary-cao/spark LimitPushdownSuite

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/spark/pull/20381.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #20381
    
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commit 183e3b1904ba59c1ff9f34a5258b0fad70ea1119
Author: caoxuewen <cao.xuewen@...>
Date:   2018-01-24T07:54:20Z

    add new unit test to LimitPushdown

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