GitHub user ron8hu opened a pull request:
https://github.com/apache/spark/pull/16395
implemented first version of filter estimation
## What changes were proposed in this pull request?
This is a WIP PR. In this version, we set up the framework to traverse
predicate and evaluate the equality (=) expression.
## How was this patch tested?
We just have a simple test case for now. More tests need to be added.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ron8hu/spark filterSelectivity
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16395.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 #16395
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commit 56d15790bd1bc5e5f7224212d3422814a2e1cfae
Author: Ron Hu <[email protected]>
Date: 2016-12-23T22:44:57Z
implemented first version of filter estimation
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