# File lib/tapkit/access/adapters/dbi.rb, line 306 def begin_transaction if open_transaction? then raise "already begun" else @channel = nil @channels.each do |channel| unless channel.fetch_progress? then unless channel.open? then channel.open end end @channel = channel break end unless @channel then @channel = create_channel @channel.open end end @open_transaction = true @commit_transaction = false @rollback_transaction = false transaction_did_begin end