GitHub user viirya opened a pull request:
https://github.com/apache/spark/pull/12898
[SPARK-15094][SQL] Do not eliminate DeserializeToObject at top of logical
plan
## What changes were proposed in this pull request?
We will eliminate the pair of `DeserializeToObject` and
`SerializeFromObject` in optimizer. However, if the `DeserializeToObject` is at
the top of logical plan, it means we want to get the domain object exactly. In
this case, we should not eliminate it.
## How was this patch tested?
`DatasetSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/viirya/spark-1 fix-ds-generic
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12898.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 #12898
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commit 481c92cb5f3b6450abe4b6de714fbd884643c77f
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-05-04T09:49:27Z
Add test case.
commit 1ac8bb24ab3d818d1d67e87887907fc31181d32b
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-05-04T13:35:28Z
Don't eliminate the DeserializeToObject at top of logical plan.
commit 697679e5154ce1b504ae97f6f9b1d65c37af7c90
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-05-04T13:38:41Z
Remove unused import.
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