GitHub user ericl opened a pull request:
https://github.com/apache/spark/pull/14425
[SPARK-16818] Exchange reuse incorrectly reuses scans over different sets
of partitions
## What changes were proposed in this pull request?
This fixes a bug wherethe file scan operator does not take into account
partition pruning in its implementation of `sameResult()`. As a result,
executions may be incorrect on self-joins over the same base file relation.
The patch here is minimal, but maybe we should reconsider using a metadata
map for implementing sameResult() in the future.
cc @rxin
## How was this patch tested?
Unit tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ericl/spark spark-16818
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14425.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 #14425
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commit e7e545fd8f7455a653c2bcee4e42a0e5249791f9
Author: Eric Liang <e...@databricks.com>
Date: 2016-07-30T22:02:48Z
Sat Jul 30 15:02:48 PDT 2016
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