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On the Expected Size of Recursive Datalog Queries

Summary: Asymptotically exact formulas for expected fixpoint sizes of two Datalog recursions (same-generation, canonical factorable) and of their Magic Sets/Factoring rewrites under selection queries. Finds recursive relations near worst-case even on sparse bases; Magic Sets yields sizes within a small constant of no-rewrite, while Factoring (when applicable) yields much smaller relations—analytic formulas closely match experiments. (summarized by gpt-5-mini on Feb 09 2026)

Paper ID
944
Venue
PODS
Year
1991
Pagerank
5.0945408e-05
Overall Rank
6,365 | 55.73%
DOI
-

Incoming Non-self Citations Over Time

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Incoming Citations (Sorted by Pagerank)

Showing 2 of 2 citing papers.

Rank Citing Paper Year Venue Pagerank
6,255 Queries are easier than you thought (probably) 1992 PODS 5.1367617e-05
10,404 Dynamic Pruning for Recursive Joins 2025 SIGMOD 4.1945683e-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
16 MAGIC SETS AND OTHER STRANGE WAYS TO IMPLEMENT LOGIC PROGRAMS (Extended Abstract) 1986 PODS 0.0010066783
365 On the Power of Magic 1987 PODS 0.00025585898
1,712 Bounds on the Propagation of Selection into Logic Programs 1987 PODS 0.00010804573
4,555 Magic Counting Methods 1987 SIGMOD 6.0891017e-05
5,515 Worst-case Complexity Analysis of Methods for Logic Query Implementation 1987 PODS 5.4636431e-05
7,156 Counting Methods for Cyclic Relations 1988 PODS 4.8145046e-05
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