MySQL 9.1 Release Notes
        
    The mysql2 Ruby gem provides an API for
    connecting to MySQL, performing queries, and iterating through
    results; it is intended to support MySQL 5.7 and MySQL 8.0. For more
    information, see the
    mysql2
    page at RubyGems.org or the project's
    GitHub
    page.
  
For background and syntax information about the Ruby language, see Ruby Programming Language.