GitHub user wzhfy opened a pull request:
https://github.com/apache/spark/pull/15360
[SPARK-17073] [SQL] [FOLLOWUP] generate column-level statistics
## What changes were proposed in this pull request?
This pr adds some test cases for statistics: case sensitive column names,
non ascii column names, refresh table, and also improves some documentation.
## How was this patch tested?
add test cases
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/wzhfy/spark colStats2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15360.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 #15360
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commit 0ad7c8837d0ef860e398349652f7589870358c14
Author: Zhenhua Wang <[email protected]>
Date: 2016-10-05T06:06:56Z
add test cases and improve documentation
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