GitHub user mn-mikke opened a pull request:
https://github.com/apache/spark/pull/22471
[SPARK-25470][SQL][Performance] Concat.eval should use pattern matching
only once
## What changes were proposed in this pull request?
The PR proposes a solution for a problem described
[here](https://github.com/apache/spark/pull/20858#discussion_r218677837).
## How was this patch tested?
Run the existing tests for Concat expression.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mn-mikke/spark SPARK-25470
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22471.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 #22471
----
commit 9051c235eb2e4a62293ea6bd55e9d7aa1cb096fe
Author: Marek Novotny <mn.mikke@...>
Date: 2018-09-19T17:49:15Z
[SPARK-25470][SQL][Performance] Concat.eval will use pattern matching only
once
----
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
