论文信息 - The Level-Cycle Merging Method

The Level-Cycle Merging Method

Counting method is an efficient algorithm in the processing of linear recursive queries in acyclic databases. Level-Cycle Merging (LCM) method is an extension of the counting method to process linear recursive queries in both cyclic and acyclic databases. The method precompiles databases to extract self level-cycle information, uses level-cycle sets to register level recurrence sequences in both up-chain and down-chain processing, and extracts answers by level matching analysis. To improve performance, golden cycle optimization is also proposed. Our analysis shows that the method has the same asymptotic running time as the counting method and a reasonable cost on EDB compilation and updates. Our study shows that Level-Cycle Merging compares favorably with other recently developed cyclic counting techniques.

Lawrence J. Henschen | Jiawei Han | Jiawei Han | L. Henschen

[1] J. Naughton,et al. Counting methods for cyclic relations , 1988, PODS.

[2] Lawrence J. Henschen,et al. Handling redundancy in the processing of recursive database queries , 1987, SIGMOD '87.

[3] Robert E. Tarjan,et al. Depth-First Search and Linear Graph Algorithms , 1972, SIAM J. Comput..

[4] David Maier,et al. Magic sets and other strange ways to implement logic programs (extended abstract) , 1985, PODS '86.

[5] Carlo Zaniolo,et al. Magic counting methods , 1987, SIGMOD '87.

[6] Domenico Saccà,et al. Worst-case complexity analysis of methods for logic query implementation , 1987, PODS.

[7] Lawrence J. Henschen,et al. On compiling queries in recursive first-order databases , 1984, JACM.

[8] Gösta Grahne,et al. Efficient evaluation for a subset of recursive queries , 1987, PODS.

[9] Lawrence J. Henschen,et al. Answering Linear Recursive Queries in Cyclic Databases , 1988, FGCS.

[10] Jiawei Han,et al. Multi-way counting method , 1989, Inf. Syst..

[11] Carlo Zaniolo,et al. The Generalized Counting Method for Recursive Logic Queries , 1986, Theor. Comput. Sci..

[12] Z. Meral Özsoyoglu,et al. Synchronized counting method , 1989, [1989] Proceedings. Fifth International Conference on Data Engineering.

[13] Catriel Beeri,et al. On the power of magic , 1987, J. Log. Program..

[14] Ling Liu,et al. Processing Multiple Linear Recursions , 1989, NACLP.