First Name : Bruce

Last Name : Lindsay

Title : fellow

Company : IBM

Address : 650 Harry Road

City : San Jose

State : CA

Mail Code : Telephone : (408) 927-1747

FAX : (408) 927-3215

E-mail :

Cyberpaper : The expanding exploitation of information derived from operational databases (OLTP) in decision support applications requires the transfer of data from the on-line OLTP DBMS to the warehouse / datamart systems. The derivation of updates to the warehouse, using log based deltas on the OLTP tables presents interseting challenges for complex derivations (joins / aggregation). Another interesting challenge is to refresh the warehouse state to "as of" some earlier time.