Monadic Datalog Containment
We reconsider the problem of containment of monadic datalog (MDL) queries in unions of conjunctive queries (UCQs). Prior work has dealt with special cases, but has left the precise complexity characterization open. We begin by establishing a 2EXPTIME lower bound on the MDL/UCQ containment problem, r...
| Główni autorzy: | , , |
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| Format: | Journal article |
| Język: | English |
| Wydane: |
2012
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