GitHub user dbtsai opened a pull request:
https://github.com/apache/spark/pull/21848
[SPARK-24890] [SQ] Short circuiting the `if` condition when `trueValue` and
`falseValue` are the same
## What changes were proposed in this pull request?
When `trueValue` and `falseValue` are semantic equivalence, the condition
expression in `if` can be removed to avoid extra computation in runtime.
## How was this patch tested?
Test added.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dbtsai/spark short-circuit-if
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21848.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 #21848
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commit 30ca8cf8aad2b3c030902bd00c4e8b0dd9acc430
Author: DB Tsai <d_tsai@...>
Date: 2018-07-23T17:22:14Z
Add if short circuit
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