Research on reconfigurable SPJ query processor for data streams
可重构数据流SPJ查询处理器的研究

Real-time processing for data streams requires a high performance system. One of the candidate solutions was using a co-processor. However, normal circuit co-processor generally maintains the same circuit, which makes the performance of the co-processor is not always optimal. In order to improve resource utilization and promote processing speed, this paper proposed a novel reconfigurable SPJ (select, projection and join) query processor, which was based on the above three query modules and corresponding instruction set. It called the corresponding module according to the query tree translated from input queries, and then self-adaptively programed with the FPGA. By changing hard wired circuit, the processor achieves the optimal processing performance. A large number of experiments verify that the processor is not only correct, but also with high-speed and flexibility.