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The complexity of reverse engineering problems for conjunctive queries
[article]
2016
arXiv
pre-print
Reverse engineering problems for conjunctive queries (CQs), such as query by example (QBE) or definability, take a set of user examples and convert them into an explanatory CQ. Despite their importance, the complexity of these problems is prohibitively high (coNEXPTIME-complete). We isolate their two main sources of complexity and propose relaxations of them that reduce the complexity while having meaningful theoretical interpretations. The first relaxation is based on the idea of using
arXiv:1606.01206v2
fatcat:bkejptrinzdrza2nvlb4sjopmi