GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/19493
[SPARK-22252][SQL][followup] Command should not be a LeafNode
## What changes were proposed in this pull request?
#19474 partially reverted #18064 but accidentally introduced a behavior
change. `Command` extended `LogicalPlan` before #18064 , but #19474 made it
extend `LeafNode`. This is an internal behavior change as now all `Command`
subclasses can't define children, and they have to implement `computeStatistic`
method.
This PR fixes this by making `Command` extend `LogicalPlan`
## How was this patch tested?
N/A
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark minor
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19493.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 #19493
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commit 03cd40ac92634f99a5553d1b367a357780800355
Author: Wenchen Fan <[email protected]>
Date: 2017-10-13T15:00:38Z
Command should not be a LeafNode
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