DMR: Designated Member Review, where a committee designates one or more members of the committee to review a decisionmaking process or a protocol or procedure), a review which would ordinarily require the full committee’s review.
MySQL 8.0-dmr 版本下载地址：
http://dev.mysql.com/downloads/mysql/8.0.html
MySQL 8.0-dmr Release Note：
http://dev.mysql.com/doc/relnotes/mysql/8.0/en/
