GitHub user joseph-torres opened a pull request:
https://github.com/apache/spark/pull/19452
[SPARK-22136][SS] Evaluate one-sided conditions early in stream-stream
joins.
## What changes were proposed in this pull request?
Evaluate one-sided conditions early in stream-stream joins.
This is in addition to normal filter pushdown, because integrating it with
the join logic allows it to take place in outer join scenarios. This means that
rows which can never satisfy the join condition won't clog up the state.
## How was this patch tested?
new unit tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/joseph-torres/spark SPARK-22136
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19452.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 #19452
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commit c90fb3cb1e112edeacb4be2604a7b628f55697f4
Author: Jose Torres <j...@databricks.com>
Date: 2017-10-06T20:44:20Z
Evaluate one-sided conditions early in stream-stream joins.
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