Storing auxiliary data for efficient maintenance and lineage tracing of complex views

As views in a data warehouse become more complex, the view maintenance process can become very complicated and potentially very inefficient. Storing auxiliary views in the warehouse can reduce the complexity and improve the efficiency of view maintenance, and the same auxiliary views can help in efficiently answering lineage tracing queries over the warehouse views. In this paper, we study the problem of selecting auxiliary views to materialize in order to minimize the total view maintenance and lineage tracing cost. We consider relational views with arbitrary use of aggregation operators, and we define an initial search space for our optimization problem based on a normal form for such view definitions. We present several auxiliary view selection algorithms, and to study their performance we conduct experiments using the TPC-D benchmark in addition to synthetic view definitions and statistics. The results of our experiments show: (1) the exhaustive algorithm that selects the optimal ...

• Type: Conference
• Year: 2000
• Where: DMDW
• Authors: Yingwei Cui, Jennifer Widom
• Keywords: Auxiliary Views, DMDW 2000, DMDW 2001, Lineage Tracing Cost, View Maintenance