Incremental maintenance of materialized OQL views

ABSTRACT The importan e of materialized views has grown signi antly with the advent of data warehousing and OLAP te hnology. This in reases the relevan e of solutions to the problem of in rementally maintaining materialized views. So far, most work on this problem has been on ned to relational settings. Proposals that apply to obje t databases have either used non-standard models or fallen short of providing a omprehensive framework. This paper ontributes a solution to the in remental view maintenan e problem for a large lass of views expressed in OQL, the query language of the ODMG standard for obje t databases. The solution applies to immediate update propagation, and works for any update operation on views de ned over a substantial subset of ODMG types. The approa h presented has been fully implemented and preliminary performan e results are reported.