GitHub user Bcpoole opened a pull request:
https://github.com/apache/spark/pull/16864
[SPARK-19527][Core] Approximate Size of Intersection of Bloom Filters
**What changes were proposed in this pull request?**
Added functions to get the Swamidass & Baldi (2007) approximation for
number of items in a Bloom filter and the intersections of two filters. Added
an exception type IncompatibleUnionException mimicing
IncompatibleMergeException. As needed for the intersection approximation, there
is a function that create the union of two Bloom filters (no mutations).
**How was this patch tested?**
Manual Tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/Bcpoole/spark
approxItemsInBloomFilterIntersection
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16864.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 #16864
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commit 7a3ad46ff86bd3d2d47f6a56bace1a0c4fd171c8
Author: Bcpoole <[email protected]>
Date: 2017-02-09T01:11:07Z
Swamidass & Baldi approx. items in intersection of two Bloom filters. Also
function to create union (non-mutation) of two Bloom filters.
commit b9680c57b2f8b1d93c28884de9a7ebbe52505f6c
Author: Bcpoole <[email protected]>
Date: 2017-02-09T01:42:36Z
Changed createUnionBloomFilter & approxItemsInIntersection to be instance
instead of static functions
commit 501ad7e22101b00862c0c77ef8c38e1b166d33a4
Author: Bcpoole <[email protected]>
Date: 2017-02-09T01:53:50Z
Updated abstract class to reflect changes in previous commit
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