GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/8859
[SPARK-10743][SQL] keep the name of expression if possible when do cast
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark cast
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/8859.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 #8859
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commit 5e60ce86d51cee6e1ab83051aef492e337198c9d
Author: Wenchen Fan <cloud0...@163.com>
Date: 2015-09-22T01:55:47Z
keep the name of expression if possible when do cast
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