gistfile1.rb

# When run from `rake sequel:db:migrate && rake sequel:db:migrate VERSION=0` 
# in a merb app with the sqlite adapter, raises:
# rake aborted!
# SQLite3::SQLException cannot start a transaction within a transaction

class AddFoosMigration < Sequel::Migration
  # This is an intentionally bogus migration that demonstrates the problem 
  # where two would be needed if this was well-written.
  def up
    create_table :foos do
      primary_key :id
      string :name
    end
  end

  def down
    drop_column :foos, :name
  end

end