title: opt + + : an object-oriented implementation for extensible database query optimization david j. dewitt , navin kabra vldb j.. authors: nan. venue: nan. year: 1999.0
title: efficient and extensible algorithms for multi query optimization prasan roy , s. seshadri , s. sudarshan , siddhesh bhobe international conference on management of data. authors: nan. venue: nan. year: 2000.0