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Support for multi-variable join keys #2404
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enhancement
Incrementally add new feature
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Version
5.1.0-SNAPSHOT
Feature
This is a follow up to https://www.mail-archive.com/users@jena.apache.org/msg20755.html
The current hash join implementation would only create a hash table for a random variable common to the first binding of either side of the join.
Multi-variable join keys are not supported resulting in bad performance for the cases described in the mail thread.
Are you interested in contributing a solution yourself?
Yes
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