TY - CONF
T1 - Flow algorithms for two pipelined filter ordering problems
T2 - Proceedings of the twenty-fifth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Y1 - 2006
A1 - Condon,Anne
A1 - Deshpande, Amol
A1 - Hellerstein,Lisa
A1 - Wu,Ning
KW - flow algorithms
KW - Pipelined filter ordering
KW - Query optimization
KW - selection ordering
AB - Pipelined filter ordering is a central problem in database query optimization, and has received renewed attention recently in the context of environments such as the web, continuous high-speed data streams and sensor networks. We present algorithms for two natural extensions of the classical pipelined filter ordering problem: (1) a distributional type problem where the filters run in parallel and the goal is to maximize throughput, and (2) an adversarial type problem where the goal is to minimize the expected value of multiplicative regret. We show that both problems can be solved using similar flow algorithms, which find an optimal ordering scheme in time O(n2), where n is the number of filters. Our algorithm for (1) improves on an earlier O(n3 log n) algorithm of Kodialam.
JA - Proceedings of the twenty-fifth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
T3 - PODS '06
PB - ACM
CY - New York, NY, USA
SN - 1-59593-318-2
UR - http://doi.acm.org/10.1145/1142351.1142379
M3 - 10.1145/1142351.1142379
ER -