GitHub user hvanhovell opened a pull request:
https://github.com/apache/spark/pull/15322
[SPARK-17753][SQL] Allow a complex expression as the input a value based
case statement
## What changes were proposed in this pull request?
We currently only allow relatively simple expressions as the input for a
value based case statement. Expressions like `case (a > 1) or (b = 2) when true
then 1 when false then 0 end` currently fail. This PR adds support for such
expressions.
## How was this patch tested?
Added a test to the ExpressionParserSuite.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/hvanhovell/spark SPARK-17753
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15322.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 #15322
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commit b25c84949edf5cf224e8ca93c18734805760dc11
Author: Herman van Hovell <[email protected]>
Date: 2016-10-02T01:02:56Z
Allow a complex expression as the input a value based case statement
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