<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ricardo Vilaça</style></author><author><style face="normal" font="default" size="100%">Francisco Cruz</style></author><author><style face="normal" font="default" size="100%">José Orlando Pereira</style></author><author><style face="normal" font="default" size="100%">Rui Oliveira</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">An Effective Scalable SQL Engine for NoSQL Databases</style></title><secondary-title><style face="normal" font="default" size="100%">Proceedings of the 13th IFIP Distributed Applications and Interoperable Systems (DAIS)</style></secondary-title><tertiary-title><style face="normal" font="default" size="100%">LNCS</style></tertiary-title></titles><dates><year><style  face="normal" font="default" size="100%">2013</style></year><pub-dates><date><style  face="normal" font="default" size="100%">June</style></date></pub-dates></dates><urls><related-urls><url><style face="normal" font="default" size="100%">https://haslab.uminho.pt/sites/default/files/rco/files/paper_29.pdf</style></url></related-urls></urls><publisher><style face="normal" font="default" size="100%">IFIP</style></publisher><pub-location><style face="normal" font="default" size="100%">Florence, Italy</style></pub-location><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;NoSQL databases were initially devised to support a few concrete extreme scale applications. Since the specificity and scale of the target systems justified the investment of manually crafting application code their limited query and indexing capabilities were not a major im- pediment. However, with a considerable number of mature alternatives now available there is an increasing willingness to use NoSQL databases in a wider and more diverse spectrum of applications and, to most of them, hand-crafted query code is not an enticing trade-off. In this paper we address this shortcoming of current NoSQL databases with an effective approach for executing SQL queries while preserving their scalability and schema flexibility. We show how a full-fledged SQL engine can be integrated atop of HBase leading to an ANSI SQL compli- ant database. Under a standard TPC-C workload our prototype scales linearly with the number of nodes in the system and outperforms a NoSQL TPC-C implementation optimized for HBase.&lt;/p&gt;
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