GitHub user ueshin opened a pull request:
https://github.com/apache/spark/pull/2825
SPARK-3969 Optimizer should have a super class as an interface.
Some developers want to replace `Optimizer` to fit their projects but can't
do so because currently `Optimizer` is an `object`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ueshin/apache-spark issues/SPARK-3969
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/2825.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 #2825
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commit 9547a23fd5ca0058d1044d19f6a96bdbb1e3b810
Author: Takuya UESHIN <ues...@happy-camper.st>
Date: 2014-10-16T10:52:19Z
Extract abstract class from Optimizer for developers to be able to replace
Optimizer.
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