GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/11606
[SPARK-13242] [SQL] codegen fallback in case-when if there many branches
## What changes were proposed in this pull request?
If there are many branches in a CaseWhen expression, the generated code
could go above the 64K limit for single java method, will fail to compile. This
PR change it to fallback to interpret mode if there are more than 20 branches.
## How was this patch tested?
Add tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark fix_when_16
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11606.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 #11606
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commit 522e7bfbf7e0d3ee4e1f6e89334c62127d880ccc
Author: Davies Liu <[email protected]>
Date: 2016-03-09T17:58:13Z
fallback for CaseWhen and CaseKeyWhen
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