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Vectorizing the merge joiner in CockroachDB
Everybody loves a fast query. So how can we make the best use of the existing information to make joins on sorted data faster? The answer is lies in vectorizing the merge join operator. Today we’ll be looking into what a merge joiner is (or what it used to be), followed by what vectorization means and how it changes the problem, and ending with how we decided to make the merge join operator faster and what this means for your queries.
George Utsin
June 18, 2019