计算机科学
計算機科學
계산궤과학
COMPUTER SCIENCE
2000年
4期
9-13
,共5页
Parallel query execution%Stream mechanism%Schedule
There exists inaccuracy in estimating the system parameters during the query optimization Query plan can also be influenced by the environmer, noises during its execution. These factors dramaritally decrease the performance. The parallel query executor of PBASE/2, which is based on the stream mechanism, can perfect the query plan statically and dynamically by the effective strategies of schedule and coordinarion to reach the overall balance of the workload.
