[GitHub] spark issue #21316: [SPARK-20538][SQL] Wrap Dataset.reduce with withNewRddEx...

[sohama4]

Github user sohama4 commented on the issue:

https://github.com/apache/spark/pull/21316
  
@kiszk @jaceklaskowski @rxin @zsxwing @maropu can we move forward here? 
Thanks!


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[GitHub] spark pull request #21316: [SPARK-20538][SQL] Wrap Dataset.reduce with withN...

[sohama4]

Github user sohama4 commented on a diff in the pull request:

https://github.com/apache/spark/pull/21316#discussion_r188143976
  
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -1607,7 +1607,9 @@ class Dataset[T] private[sql](
*/
   @Experimental
   @InterfaceStability.Evolving
-  def reduce(func: (T, T) => T): T = rdd.reduce(func)
+  def reduce(func: (T, T) => T): T = withNewExecutionId {
--- End diff --

Thanks, that makes sense when I looked at the code for `foreach` and 
`foreachPartition`; I put up a new version with this change. It however wasn't 
clear immediately how the new function `withNewRDDExecutionId` would be 
beneficial over `withNewExecutionId`, can you elaborate a little when you get 
the chance?


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[GitHub] spark issue #21316: [SPARK-20538][SQL] Wrap Dataset.reduce with withNewExecu...

[sohama4]

Github user sohama4 commented on the issue:

https://github.com/apache/spark/pull/21316
  
Thanks for the approval @jaceklaskowski! Can you leave a comment so that 
Jenkins can get testing underway?


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[GitHub] spark pull request #21316: [SPARK-20538][SQL] Wrap Dataset.reduce with withN...

[sohama4]

Github user sohama4 commented on a diff in the pull request:

https://github.com/apache/spark/pull/21316#discussion_r187832727
  
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -1607,7 +1607,9 @@ class Dataset[T] private[sql](
*/
   @Experimental
   @InterfaceStability.Evolving
-  def reduce(func: (T, T) => T): T = rdd.reduce(func)
+  def reduce(func: (T, T) => T): T = withNewExecutionId {
--- End diff --

I believe so.


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[GitHub] spark issue #21316: [SPARK-20538][SQL] Wrap Dataset.reduce with withNewExecu...

[sohama4]

Github user sohama4 commented on the issue:

https://github.com/apache/spark/pull/21316
  
@vanzin @maropu @gatorsmile @jaceklaskowski can someone take a look at 
this? I'd appreciate it!


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[GitHub] spark pull request #21316: [SPARK-20538][SQL] Wrap Dataset.reduce with withN...

[sohama4]

GitHub user sohama4 opened a pull request:

https://github.com/apache/spark/pull/21316

[SPARK-20538][SQL] Wrap Dataset.reduce with withNewExecutionId.

## What changes were proposed in this pull request?

Wrap Dataset.reduce with `withNewExecutionId`.


You can merge this pull request into a Git repository by running:

$ git pull https://github.com/sohama4/spark dataset_reduce_withexecutionid

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/spark/pull/21316.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 #21316


commit 9b507bc4312e0cadd84a6436a0311e739ae22d18
Author: Soham Aurangabadkar <sohama4@...>
Date:   2018-05-13T22:19:05Z

Wrap Dataset.reduce with withNewExecutionId.




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