Results 1 - 10
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753
An effective scalable SQL engine for nosql databases
- In Distributed Applications and Interoperable Systems (DAIS
, 2013
"... Abstract. 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. Howe ..."
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Cited by 2 (1 self)
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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
CorrectDB: SQL Engine with Practical Query Authentication
"... Clients of outsourced databases need Query Authentication (QA) guaranteeing the integrity (correctness and completeness), and authenticity of the query results returned by potentially compromised providers. Existing results provide QA assurances for a limited class of queries by deploying several so ..."
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Cited by 3 (0 self)
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Clients of outsourced databases need Query Authentication (QA) guaranteeing the integrity (correctness and completeness), and authenticity of the query results returned by potentially compromised providers. Existing results provide QA assurances for a limited class of queries by deploying several software cryptographic constructs. Here, we show that, to achieve QA, however, it is significantly cheaper and more practical to deploy serverhosted, tamper-proof co-processors, despite their higher acquisition costs. Further, this provides the ability to handle arbitrary queries. To reach this insight, we extensively survey existing QA work and identify interdependencies and efficiency relationships. We then introduce CorrectDB, a new DBMS with full QA assurances, leveraging server-hosted, tamper-proof, trusted hardware in close proximity to the outsourced data. 1.
Impala: A modern, open-source sql engine for hadoop
- In Proc. CIDR’15
, 2015
"... Cloudera Impala is a modern, open-source MPP SQL en-gine architected from the ground up for the Hadoop data processing environment. Impala provides low latency and high concurrency for BI/analytic read-mostly queries on Hadoop, not delivered by batch frameworks such as Apache Hive. This paper presen ..."
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Cited by 12 (0 self)
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Cloudera Impala is a modern, open-source MPP SQL en-gine architected from the ground up for the Hadoop data processing environment. Impala provides low latency and high concurrency for BI/analytic read-mostly queries on Hadoop, not delivered by batch frameworks such as Apache Hive. This paper
Tractable reasoning and efficient query answering in description logics: The DL-Lite family
- J. OF AUTOMATED REASONING
, 2007
"... We propose a new family of Description Logics (DLs), called DL-Lite, specifically tailored to capture basic ontology languages, while keeping low complexity of reasoning. Reasoning here means not only computing subsumption between concepts, and checking satisfiability of the whole knowledge base, b ..."
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Cited by 497 (123 self)
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TBox reasoning is independent of the ABox, and the part of the process requiring access to the ABox can be carried out by an SQL engine, thus taking advantage of the query optimization strategies provided by current Data Base Management Systems. Since it can be shown that even slight extensions
Pig Latin: A Not-So-Foreign Language for Data Processing
"... There is a growing need for ad-hoc analysis of extremely large data sets, especially at internet companies where innovation critically depends on being able to analyze terabytes of data collected every day. Parallel database products, e.g., Teradata, offer a solution, but are usually prohibitively e ..."
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Cited by 607 (13 self)
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expensive at this scale. Besides, many of the people who analyze this data are entrenched procedural programmers, who find the declarative, SQL style to be unnatural. The success of the more procedural map-reduce programming model, and its associated scalable implementations on commodity hardware
Relational Databases for Querying XML Documents: Limitations and Opportunities
, 1999
"... XML is fast emerging as the dominant standard for representing data in the World Wide Web. Sophisticated query engines that allow users to effectively tap the data stored in XML documents will be crucial to exploiting the full power of XML. While there has been a great deal of activity recently prop ..."
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Cited by 478 (9 self)
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XML is fast emerging as the dominant standard for representing data in the World Wide Web. Sophisticated query engines that allow users to effectively tap the data stored in XML documents will be crucial to exploiting the full power of XML. While there has been a great deal of activity recently
Preference SQL -- Design, Implementation, Experiences
, 2002
"... Current search engines can hardly cope adequately with fuzzy predicates defined by complex preferences. The biggest problem of search engines implemented with standard SQL is that SQL does not directly understand the notion of preferences. Preference SQL extends SQL by a preference model based on st ..."
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Cited by 103 (12 self)
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Current search engines can hardly cope adequately with fuzzy predicates defined by complex preferences. The biggest problem of search engines implemented with standard SQL is that SQL does not directly understand the notion of preferences. Preference SQL extends SQL by a preference model based
Reducing the braking distance of an SQL query engine
- In Proc. of the 24th VLDB Conf
, 1998
"... In a recent paper, we proposed adding a STOP AFTER clause to SQL to permit the cardinality of a query result to be explicitly limited by query writers and query tools. We demonstrated the usefulness of having this clause, showed how to extend a traditional cost-based query optimizer to accommodate i ..."
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Cited by 89 (6 self)
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In a recent paper, we proposed adding a STOP AFTER clause to SQL to permit the cardinality of a query result to be explicitly limited by query writers and query tools. We demonstrated the usefulness of having this clause, showed how to extend a traditional cost-based query optimizer to accommodate
DL-Lite: Tractable description logics for ontologies
- In Proc. of AAAI 2005
, 2005
"... We propose a new Description Logic, called DL-Lite, specifically tailored to capture basic ontology languages, while keeping low complexity of reasoning. Reasoning here means not only computing subsumption between concepts, and checking satisfiability of the whole knowledge base, but also answering ..."
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Cited by 211 (49 self)
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of the ABox, and the part of the process requiring access to the ABox can be carried out by an SQL engine, thus taking advantage of the query optimization strategies provided by current DBMSs.
MoSQL: An Elastic Storage Engine for MySQL
- In Proceedings of the 28th Annual ACM Symposium on Applied Computing, SAC ’13
, 2013
"... We present MoSQL, a MySQL storage engine using a trans-actional distributed key-value store system for atomicity, iso-lation and durability and a B+Tree for indexing purposes. Despite its popularity, MySQL is still without a general-purpose storage engine providing high availability, serializ-abilit ..."
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Cited by 2 (1 self)
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We present MoSQL, a MySQL storage engine using a trans-actional distributed key-value store system for atomicity, iso-lation and durability and a B+Tree for indexing purposes. Despite its popularity, MySQL is still without a general-purpose storage engine providing high availability, serializ
Results 1 - 10
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753