Andrei Arion
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View article: Efficiently Maintaining Distributed Model-Based Views on Real-Time Data Streams
Efficiently Maintaining Distributed Model-Based Views on Real-Time Data Streams Open
Minimizing communication cost is a fundamental problem in large-scale federated sensor networks. Existing solutions applicable for the problem are often ad-hoc for specific query types, or they are inefficient when query results contain la…
View article: Optimizing XML Compression in XQueC
Optimizing XML Compression in XQueC Open
We present our approach to the problem of optimizing compression choices in the context of the XQueC compressed XML database system. In XQueC, data items are aggregated into containers, which are further grouped to be compressed together. …
View article: The XQueC Project: Compressing and Querying XML
The XQueC Project: Compressing and Querying XML Open
We outline in this paper the main contributions of the XQueC project. XQueC, namely XQuery processor and Compressor, is the first compression tool to seamlessly allow XQuery queries in the compressed domain. It includes a set of data struc…
View article: Algebra-based extraction of tree patterns in XQuery
Algebra-based extraction of tree patterns in XQuery Open
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View article: Path Summaries and Path Partitioning in Modern XML Databases
Path Summaries and Path Partitioning in Modern XML Databases Open
We study the applicability of XML path summaries in the context of current-day XML databases. We find that summaries provide an excellent basis for optimizing data access methods, which furthermore mixes very well with path-partitioned sto…
View article: Structured Materialized Views for XML Queries.
Structured Materialized Views for XML Queries. Open
The performance of XML database queries can be greatly enhanced by employing materialized views. We present containment and rewriting algorithms for tree pattern queries that correspond to a large and important subset of XQuery, in the pre…