Search: in, almaden.ibm.com, n/a

3 results

Results

Constraint-based XML query rewriting for data integration

... or XML schemas, and can be independently designed. In addition to the source-to-target mappings, we consider as part of the ... at the target. We define the semantics of query answering in such an integration scenario, and design two novel algorithms, basic query ...

Publication - huliganka - 04/17/2013 - 00:38 - 0 comments - 1 attachment

Query reformulation with constraints

... be a Σ1-query. An (equivalent) reformulation of q1 in the presence of C is a Σ2-query, q2, such that q2 gives the same ... ∪ Σ2-database instance that satisfies C. In general, there may exist multiple such reformulations and choosing among ...

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

Maintenance of Materialized Views: Problems, Techniques, and Applications

... 250.47 KB In this paper we motivate and describe materialized views, their applications, ... describe some of the view maintenance techniques proposed in the literature in terms of our taxonomy. Finally, we consider new and promising application ...

Publication - cat - 04/16/2013 - 16:05 - 0 comments - 1 attachment