The efficiency and versatility for the implementation of formulas in an on-demand database is improved. Formulas are categorized. Based at least partly on the categorization, formulas are evaluated synchronously or asynchronously. An asynchronous evaluation may be performed if a certain set of criteria...http://www.google.com.hk/patents/US7814052?utm_source=gb-gplus-share專利 US7814052 - Implementing formulas for custom fields in an on-demand database
