Improvement to the PF
نویسندگان
چکیده
The PF algorithm, discussed in HD92], computes changes to a materialized view when the underlying base relations change. The algorithm considers each changed base relation in turn and propagates the changes to the derived relations. We propose ways of making this propagation process eecient by exploiting stratiication Ull89] of programs and by storing and reusing some of the information derived by the PF algorithm in HD92].
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