GitHub user kiszk opened a pull request:
https://github.com/apache/spark/pull/19777
[SPARK-22549][SQL] Fix 64KB JVM bytecode limit problem with concat_ws
## What changes were proposed in this pull request?
This PR changes `concat_ws` code generation to place generated code for
expression for arguments into separated methods if these size could be large.
This PR resolved the case of `concat_ws` with a lot of argument
## How was this patch tested?
Added new test cases into `StringExpressionsSuite`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kiszk/spark SPARK-22549
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19777.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 #19777
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commit 1714c883d193f96e43c19e72a96c15c23d5fc193
Author: Kazuaki Ishizaki <ishiz...@jp.ibm.com>
Date: 2017-11-18T02:40:00Z
initial commit
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