20140312224442_add_index_to_lower_login.rb

class AddIndexToLowerLogin < ActiveRecord::Migration
  def up
    execute "CREATE INDEX lower_login ON users (LOWER(login))" if ActiveRecord::Base.connection.instance_of? ActiveRecord::ConnectionAdapters::PostgreSQLAdapter
  end

  def down
    execute "DROP INDEX lower_login" if ActiveRecord::Base.connection.instance_of? ActiveRecord::ConnectionAdapters::PostgreSQLAdapter;
  end
end