OptionalhostOptionalportOptionaluserOptionalpasswordOptionaldatabaseOptionalconnectionEscape hatch for any other mysql2 connection option.
OptionalclientA pre-built mysql2 connection/pool (or compatible mock). When provided,
connect() uses it directly and skips require('mysql2/promise'). This
is how tests inject a mock without the real driver installed.
Connection options for
StarrocksStore(map ontomysql2connection config).