add topn_per_group plan and executors for leaderboard task

cmu-db / bustub

The BusTub Relational Database Management System (Educational)

https://15445.courses.cs.cmu.edu

MIT License

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Closed AveryQi115 closed 1 year ago

AveryQi115 commented 1 year ago

DO NOT PUSH PROJECT SOLUTIONS PUBLICLY.

And especially do NOT open pull requests with project solutions!

Please be considerate of this free educational resource.