Querying DAG-shaped Execution Traces Through Views

Abstract

The question whether a given set of views, defined by queries, can be used to answer another query, arises in several contexts such as query optimization, data integration and semantic caching [24, 10, 12]. This paper studies a specific instance of this problem, where the queried data has the shape of a DAG (Directed Acyclic Graph) and the query language… (More)

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