schema_migration

# File activerecord/lib/active_record/connection_adapters/abstract_adapter.rb, line 139
      def schema_migration # :nodoc:
        @schema_migration ||= begin
                                conn = self
                                spec_name = conn.pool.pool_config.connection_specification_name

                                return ActiveRecord::SchemaMigration if spec_name == "ActiveRecord::Base"

                                schema_migration_name = "#{spec_name}::SchemaMigration"

                                Class.new(ActiveRecord::SchemaMigration) do
                                  define_singleton_method(:name) { schema_migration_name }
                                  define_singleton_method(:to_s) { schema_migration_name }

                                  self.connection_specification_name = spec_name
                                end
                              end
      end