attempting to connect to sybase but resolving to mssql adapter

require 'rubygem开发者_开发百科s'
require 'jdbc/jtds'
require 'activerecord-jdbc-adapter'
config = {
  :username => 'me',
  :password => 'mypass',
  :adapter => 'jdbc',
  :driver => 'net.sourceforge.jtds.jdbc.Driver',
  :url => 'jdbc:jtds:sybase://myserver:1234/mydb'
}
ActiveRecord::Base.establish_connection( config )
ActiveRecord::Base.connection.class
#  => ActiveRecord::ConnectionAdapters::MssqlJdbcConnection

I realise that MSSQL and Sybase have a shared history, but is it correct that I get this adapter when connecting to Sybase?

My problem is that types are not being mapped to ruby type correctly. e.g. floats and, decimals are being translated to String.

Gems:

• activerecord-jdbc-adapter 1.1.3
• jdbc-jtds 1.2.5

ActiveRecord will resolved the JDBC adapter by adding the

:dialect => 'sybase'

...config option