GitHub user viirya opened a pull request:
https://github.com/apache/spark/pull/19345
[SPARK-22124][SQL] Sample and Limit should also defer input evaluation
under codegen
## What changes were proposed in this pull request?
We can override `usedInputs` to claim that an operator defers input
evaluation. `Sample` and `Limit` are two operators which should claim it but
don't. We should do it.
## How was this patch tested?
Existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/viirya/spark-1 SPARK-22124
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19345.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 #19345
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commit 0252663f998edd1deb75e99b9a1d7ab9ec806a29
Author: Liang-Chi Hsieh <vii...@gmail.com>
Date: 2017-09-26T02:11:02Z
Claim deferred input evaluation for Sample and Limit.
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