GitHub user rxin opened a pull request:
https://github.com/apache/spark/pull/10722
[SPARK-12768][SQL] Remove CaseKeyWhen expression
This patch removes CaseKeyWhen expression and replaces it with a factory
method that generates the equivalent CaseWhen. This reduces the amount of code
we'd need to maintain in the future for both code generation and optimizer.
Note that we introduced CaseKeyWhen to avoid duplicate evaluations of the
key. This is no longer a problem because we now have common subexpression
elimination.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rxin/spark SPARK-12768
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10722.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 #10722
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commit 98a3b038dcd8de00502e7192e0bb6ebe13c4b338
Author: Reynold Xin <[email protected]>
Date: 2016-01-12T03:03:32Z
[SPARK-12762][SQL] Add unit test for simplifying if expression.
commit 7ba85c21e207b3ff0bfc8356a888f2e395a1f139
Author: Reynold Xin <[email protected]>
Date: 2016-01-12T03:04:54Z
Unit test.
commit e7c8475c26dad87d5785f0b0c0b5b8415fdf5e40
Author: Reynold Xin <[email protected]>
Date: 2016-01-12T05:06:48Z
Fix import style.
commit 5c03a76a0267fb2f63954aa53898a73ea2af8f53
Author: Reynold Xin <[email protected]>
Date: 2016-01-12T06:59:57Z
Fix CombiningLimitsSuite
commit d8a08edb669c17c99a8212fecc7d30ae6b42a172
Author: Reynold Xin <[email protected]>
Date: 2016-01-12T07:44:37Z
Revert logDebug
commit 6be7b956835010248d48f551d469a176f5a946e1
Author: Reynold Xin <[email protected]>
Date: 2016-01-12T08:08:20Z
[SPARK-12768][SQL] Remove CaseKeyWhen
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