# File lib/active_record/connection_adapters/oracle_adapter.rb, line 617
    def initialize(config, factory = OracleConnectionFactory.new)
      @active = true
      @username, @password, @database, = config[:username], config[:password], config[:database]
      @async = config[:allow_concurrency]
      @prefetch_rows = config[:prefetch_rows] || 100
      @cursor_sharing = config[:cursor_sharing] || 'similar'
      @factory = factory
      @connection  = @factory.new_connection @username, @password, @database, @async, @prefetch_rows, @cursor_sharing
      super @connection
    end