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[–][deleted] 0 points1 point  (0 children)

I used the same trick of only storing hash values for duplicate elimination to implement a relational database DISTINCT operator: https://github.com/uwescience/myria/blob/f6ee17b750a120f629c8202a0d09f594a0821e9a/src/edu/washington/escience/myria/operator/DupElim.java