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Schema-based Scheduling of Event Processors and Buffer Minimization for Queries on Structured Data Streams | | Christoph Koch
; Stefanie Scherzinger
; Nicole Schweikardt
; Bernhard Stegmaier
; | | Date: |
7 Jun 2004 | | Subject: | Databases ACM-class: H.2.3, H.2.4 | cs.DB | | Abstract: | We introduce an extension of the XQuery language, FluX, that supports event-based query processing and the conscious handling of main memory buffers. Purely event-based queries of this language can be executed on streaming XML data in a very direct way. We then develop an algorithm that allows to efficiently rewrite XQueries into the event-based FluX language. This algorithm uses order constraints from a DTD to schedule event handlers and to thus minimize the amount of buffering required for evaluating a query. We discuss the various technical aspects of query optimization and query evaluation within our framework. This is complemented with an experimental evaluation of our approach. | | Source: | arXiv, cs.DB/0406016 | | Services: | Forum | Review | PDF | Favorites | |
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