Schema Evolution publication categorizer

... Let Σ1, Σ2 be two schemas, which may overlap, C be a set of constraints on the joint schema Σ1 ∪ Σ2, and q1 ... An (equivalent) reformulation of q1 in the presence of C is a Σ2-query, q2, such that q2 gives the same answers as q1 on any ...

Publication - huliganka - 04/16/2013 - 23:38 - 0 comments - 1 attachment