[GitHub] spark pull request #23170: [SPARK-24423][FOLLOW-UP][SQL] Fix error example

[wangyum]

GitHub user wangyum opened a pull request:

    https://github.com/apache/spark/pull/23170

    [SPARK-24423][FOLLOW-UP][SQL] Fix error example

    ## What changes were proposed in this pull request?
    
![image](https://user-images.githubusercontent.com/5399861/49172173-42ad9800-f37b-11e8-8135-7adc323357ae.png)
    It will throw:
    ```
    requirement failed: When reading JDBC data sources, users need to specify 
all or none for the following options: 'partitionColumn', 'lowerBound', 
'upperBound', and 'numPartitions'
    ```
    and 
    ```
    User-defined partition column subq.c1 not found in the JDBC relation ...
    ```
    
    This PR fix this error example.
    
    ## How was this patch tested?
    
    manual tests


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

    $ git pull https://github.com/wangyum/spark SPARK-24499

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

    https://github.com/apache/spark/pull/23170.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 #23170
    
----
commit e2d8229614ed232d1089c304cbc4bdb88292d213
Author: Yuming Wang <yumwang@...>
Date:   2018-11-28T17:59:23Z

    Fix error example

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