Beyond Databases, Architectures, and Structures: 10th by Stanislaw Kozielski, Dariusz Mrozek, Pawel Kasprowski,

By Stanislaw Kozielski, Dariusz Mrozek, Pawel Kasprowski, Bożena Malysiak-Mrozek, Daniel Kostrzewa

This ebook constitutes the refereed complaints of the tenth IEEE overseas convention past Databases, Architectures, and constructions, BDAS 2014, held in Ustron, Poland, in could 2014. This publication includes fifty six conscientiously revised chosen papers which are assigned to eleven thematic teams: question languages, transactions and question optimization; facts warehousing and large facts; ontologies and semantic internet; computational intelligence and knowledge mining; collective intelligence, scheduling, and parallel processing; bioinformatics and organic info research; photo research and multimedia mining; safeguard of database structures; spatial facts research; functions of database structures; internet and XML in database systems.

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Additional info for Beyond Databases, Architectures, and Structures: 10th International Conference, BDAS 2014, Ustron, Poland, May 27-30, 2014. Proceedings

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E. a partial order of possible materialized aggregates that accelerate analytic queries. We show algorithms that find possibilities to build indices on stored aggregations to further improve the efficiency of querying. Performed experimental evaluation proves that using metagranules and their indices can significantly improve the efficiency of an application. However, the overhead imposed by them is noteworthy. Therefore, one cannot materialize all desired aggregations. A quantitave model to balance the cost and profits of metagranules is needed to choose the optimal set of metagranules and indices.

ObjectRelationalToolComparison. Unfortunately, most of the websites that take up this subject is outdated or incomplete and there is a very little number of scientific publications focused on comparative analysis of ORM tools. NET technology: Entity Framework [6] and NHibernate [1]. In the research performed in 2010 [4] the both tools were analysed, however over last years, both interfaces were extensively developed and improved, and especially Entity Framework got a lot of positive reviews since the previous release.

Partially ordered aggregations of the fact table. When a query is posed, the actual aggregation level will be determined and the smallest fit metagranule (materialized aggregation) will be used instead of the fact table. e. indices on metagranules. Assume a user issuing an aggregate query to a fact table with a selective HAVING or small LIMIT-ORDER BY clause. The database engine can not only identify the best metagranule but it can also use the index on that metagranule in order not to scan its full content.

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