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arxiv: 1501.01817 · v2 · pith:WLUVRXNSnew · submitted 2015-01-08 · 💻 cs.DB

The Hunt for a Red Spider: Conjunctive Query Determinacy Is Undecidable

classification 💻 cs.DB
keywords conjunctivedeterminacyproblemqueryundecidabledatabaseshuntknown
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We solve a well known, long-standing open problem in relational databases theory, showing that the conjunctive query determinacy problem (in its "unrestricted" version) is undecidable.

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