Change hashjoin cost formula - Githubissues

don-tay / simpledb

Subset of SQL-compliant DBMS

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Change hashjoin cost formula #44

Closed don-tay closed 2 years ago

don-tay commented 2 years ago

Changes in this PR

[x] Bug fix
[ ] New feature
[ ] Breaking change of an existing feature
[ ] Refactor/Performance enhancements

Overview

Update hash join cost formula to 2 * (|M| + |N|) + |M| + ||M||/B * |N|/B