Efficient XML query processing in RDBMS using GUI-driven prefetching in a single-user environment
DASFAA'07 Proceedings of the 12th international conference on Database systems for advanced applications
GBLENDER: towards blending visual query formulation and query processing in graph databases
Proceedings of the 2010 ACM SIGMOD International Conference on Management of data
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formulation and efficient processing of the formulated query. However, due to the nature of XML data, formulating an XML query using an XML query language such as XQuery requires considerable effort. A user must be completely familiar with the syntax of the query language, and must be able to express his/her needs accurately in a syntactically correct form. In many real life applications it is not realistic to assume that users are proficient in expressing such textual queries. Hence, there is a need for a user-friendly visual querying schemes to replace data retrieval aspects of XQuery. In this paper, we address the problem of efficient processing of XQueries in the relational environment where the queries are formulated using a user-friendly GUI. We take a novel and non-traditional approach to improving query performance by prefetching data during the formulation of a query in a single-user environment. The latency offered by the GUI-based query formulation is utilized to prefetch portions of the query results. The basic idea we employ for prefetching is that we prefetch constituent path expressions, store the intermediary results, reuse them when connective is added or "Run" is pressed.