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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2020/12/07 21:15:11 UTC

[GitHub] [arrow] Dandandan edited a comment on pull request #8863: ARROW-10837: [Rust][DataFusion] Use `Vec` for hash join keys

Dandandan edited a comment on pull request #8863:
URL: https://github.com/apache/arrow/pull/8863#issuecomment-740183272


   As a next step after this, I think it would be interesting if we can have a look at calculating the hashes on the columns instead to benefit from the columnar data layout.
   
   Some material I found on this:
   
   https://www.cockroachlabs.com/blog/vectorized-hash-joiner/ (simple explanation)
   https://pure.uva.nl/ws/files/4321270/68049_09.pdf 
   
   Please add if you know of more/newer material!


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