Solving Implication Problems in Database Applications
Summary: Graph/SAT framing of the implication problem for derived DB relations, relevant to query derivation, view maintenance, and optimization. General problem NP-hard with all six operators and both conjunctions and disjunctions; polynomial-time algorithm for restricted case (no != in Q, no disjunction in T); analyzes # and disjunctions, giving necessary conditions to detect tractable instances for heuristics. (summarized by gpt-5-nano on Feb 09 2026)
Incoming Non-self Citations Over Time
Authors
- 1. Xian-He Sun
- 2. Nabil Kamel
- 3. Lionel M. Ni
Incoming Citations (Sorted by Pagerank)
Showing 2 of 2 citing papers.
| Rank | Citing Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 2,647 | WATCHMAN: A Data Warehouse Intelligent Cache Manager | 1996 | VLDB | 8.3750419e-05 |
| 5,136 | Temporal Query Processing and Optimization in Multiprocessor Database Machines | 1992 | VLDB | 5.6666995e-05 |
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Outgoing Citations (Sorted by Pagerank)
Showing 6 of 6 cited papers.
Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.
| Rank | Cited Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 55 | Efficiently Updating Materialized Views | 1986 | SIGMOD | 0.00065687017 |
| 406 | Global Query Optimization | 1986 | SIGMOD | 0.00023989944 |
| 413 | Computing Queries from Derived Relations | 1985 | VLDB | 0.00023802724 |
| 927 | Updating Derived Relations: Detecting Irrelevant and Autonomously Computable Updates | 1986 | VLDB | 0.00015237571 |
| 3,160 | Horizontal Data Partitioning In Database Design | 1982 | SIGMOD | 7.4649653e-05 |
| 7,882 | Fragments Of Relations | 1983 | SIGMOD | 4.6242644e-05 |
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