GitHub user tdas opened a pull request:
https://github.com/apache/spark/pull/20755
[SPARK-23406][SS] Enable stream-stream self-joins for branch-2.3
## What changes were proposed in this pull request?
This is limited but safe-to-backport version of self-join-fix made in
#20598
That PR solved two bugs
1. Add MultiInstanceRelation trait to leaf logical nodes to allow
resolution - This is the major fix required to allow streaming self-joins, and
is safe to backport.
2. Fix attribute rewriting in MicroBatchExecution when micro-batch plans
are spliced into the streaming logical plan - This is a minor fix that is not
safe to backport. Without this fix only a very small fraction self-join cases
will have issues, but those issues may lead to incorrect results.
## How was this patch tested?
New unit test
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tdas/spark SPARK-23406-2.3
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20755.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 #20755
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commit 484babb58d9cf61d5dcc6521865cd2a5db64dd82
Author: Tathagata Das <tathagata.das1565@...>
Date: 2018-03-07T00:53:34Z
Fixed
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