This is not a book, but we did write up some documentation for developers that gives a nice overview of how the optimizer works: https://github.com/cockroachdb

This is not a book, but we did write up some documentation for developers that gives a nice overview of how the optimizer works: https://github.com/cockroachdb/cockroach/blob/master/pkg/sql/opt/doc.go https://github.com/cockroachdb/cockroach/blob/master/pkg/sql... Might be worth a read if you're interested in implementation techniques.