GitHub user mengxr opened a pull request:
https://github.com/apache/spark/pull/12330
[SPARK-14563] [ML] use a random table name instead of __THIS__ in
SQLTransformer
## What changes were proposed in this pull request?
Use a random table name instead of `__THIS__` in SQLTransformer, and add a
test for `transformSchema`. The problems of using `__THIS__` are:
* It doesn't work under HiveContext (in Spark 1.6)
* Race conditions
## How was this patch tested?
* Manual test with HiveContext.
* Added a unit test for `transformSchema` to improve coverage.
cc: @yhuai
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mengxr/spark SPARK-14563
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12330.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 #12330
----
commit 88691326241101b45c5c2bcfb94a7274fb3975e2
Author: Xiangrui Meng <[email protected]>
Date: 2016-04-12T17:31:16Z
use a random table name instead of __THIS__ in SQLTransformer
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