module ActiveRecord::ConnectionAdapters

Constants

MYSQL2_ADAPTER_PARENT
MYSQL_ABSTRACT_ADAPTER

ActiveRecord 3.1+ support

MYSQL_ADAPTER_PARENT
POSTGRES_ADAPTER_PARENT
SQLITE_ADAPTER_PARENT
USE_ARJDBC_WORKAROUND

Activerecord-jdbc-adapter defines class dependencies a bit differently - if it is present, confirm to ArJdbc hierarchy to avoid 'superclass mismatch' errors.