GitHub user rxin opened a pull request:

    https://github.com/apache/spark/pull/12617

    [SPARK-14855][SQL] Add "Exec" suffix to all physical operators

    ## What changes were proposed in this pull request?
    This patch adds "Exec" suffix to all physical operators. Before this patch, 
Spark's physical operators and logical operators are named the same (e.g. 
Project could be logical.Project or execution.Project), which caused small 
issues in code review and bigger issues in code refactoring.
    
    ## How was this patch tested?
    N/A

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

    $ git pull https://github.com/rxin/spark exec-node

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

    https://github.com/apache/spark/pull/12617.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 #12617
    
----
commit 2b5812a93f935b041570ad44879fc7681eddab0e
Author: Reynold Xin <[email protected]>
Date:   2016-04-22T19:09:19Z

    Rename UnaryNode, BinaryNode, and LeafNode

commit 3590413e01ec7e34748f6f13942656b95b350d3a
Author: Reynold Xin <[email protected]>
Date:   2016-04-22T19:36:34Z

    [SPARK-14855][SQL] Add "Exec" suffix to all physical operators

commit 6669490ca90eaf247b694e0a83e8a1390cc31623
Author: Reynold Xin <[email protected]>
Date:   2016-04-22T19:39:30Z

    fix style

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