ICDE - Query Processing Accurate Estimation of the Cost of Spatial Selections A. Aboulnaga J. Naughton User Defined Aggregates in Object-Relational Systems H. Wang C. Zaniolo Scalable Algorithms for Large Temporal Aggregation B. Moon I. López V. Immanuel Return to ICDE session listing DiSC'01 Copyright ©2002 ACM Inc.