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There exist two approaches for exact probabilistic inference of UCQs ontuple-independent databases. In the extensional approach, query evaluation isperformed within a DBMS by exploiting the structure of the query. In theintensional approach, one first builds a representation of the lineage of thequery on the database, then computes the probability of the lineage. In thispaper we propose a new technique to construct lineage representations asdeterministic decomposable circuits in PTIME. The technique can apply to aclass of UCQs that has been conjectured to separate the complexity of the twoapproaches. We test our technique experimentally, and show that it succeeds onall the queries of this class up to a certain size parameter, i.e., over $20$million queries.

Towards Deterministic Decomposable Circuits for Safe Queries