# File lib/jdbc_adapter/jdbc_oracle.rb, line 12
    def self.extended(mod)
      unless @lob_callback_added
        ActiveRecord::Base.class_eval do
          def after_save_with_oracle_lob
            self.class.columns.select { |c| c.sql_type =~ /LOB\(|LOB$/i }.each do |c|
              value = self[c.name]
              value = value.to_yaml if unserializable_attribute?(c.name, c)
              next if value.nil?  || (value == '')

              connection.write_large_object(c.type == :binary, c.name, self.class.table_name, self.class.primary_key, quote_value(id), value)
            end
          end
        end

        ActiveRecord::Base.after_save :after_save_with_oracle_lob
        @lob_callback_added = true
      end
    end