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Publications associées (143)
A Query Model to Capture Event Pattern Matching in RDF Stream Processing Query Languages
The current state of the art in RDF Stream Processing (RSP) proposes several models and implementations to combine Semantic Web technologies with Data Stream Management System (DSMS) operators like windows. Meanwhile, only a few solutions combine Semantic ...
Springer Int Publishing Ag2016Parallelizing Query Optimization on Shared-Nothing Architectures
Christoph Koch, Immanuel Trummer
Data processing systems offer an ever increasing degree of parallelism on the levels of cores, CPUs, and processing nodes. Query optimization must exploit high degrees of parallelism in order not to gradually become the bottleneck of query evaluation. We s ...
Assoc Computing Machinery2016Query Rewriting in RDF Stream Processing
Querying and reasoning over RDF streams are two increasingly relevant areas in the broader scope of processing structured data on the Web. While RDF Stream Processing (RSP) has focused so far on extending SPARQL for continuous query and event processing, s ...
Springer2016Multi-Objective Parametric Query Optimization
Christoph Koch, Immanuel Trummer
We propose a generalization of the classical database query optimization problem: multi-objective parametric query optimization (MPQ). MPQ compares alternative processing plans according to multiple execution cost metrics. It also models missing pieces of ...
Association for Computing Machinery2016Fast Queries Over Heterogeneous Data Through Engine Customization
Anastasia Ailamaki, Manolis Karpathiotakis, Ioannis Alagiannis
Industry and academia are continuously becoming more data-driven and data-intensive, relying on the analysis of a wide variety of heterogeneous datasets to gain insights. The different data models and formats pose a significant challenge on performing anal ...
Assoc Computing Machinery2016Maximizing k-Submodular Functions and Beyond
We consider the maximization problem in the value oracle model of functions defined on k-tuples of sets that are submodular in every orthant and r-wise monotone, where k >= 2 and 1
Assoc Computing Machinery2016From Massive Parallelization to Quantum Computing: Seven Novel Approaches to Query Optimization
The goal of query optimization is to map a declarative query (describing data to generate) to a query plan (describing how to generate the data) with optimal execution cost. Query optimization is required to support declarative query interfaces. It is a co ...
EPFL2016Explicit Suggestion of Query Terms for News Search using Topic Models and Word Embeddings
Andrei Popescu-Belis, Parvaz Mahdabi
This report presents a study on assisting users in building queries to perform real-time searches in a news and social media monitoring system. The system accepts complex queries, and we assist the user by suggesting related keywords or entities. We do thi ...
Idiap2016Functional Pearl: A SQL to C Compiler in 500 Lines of Code
We present the design and implementation of a SQL query processor that outperforms existing database systems and is written in just about 500 lines of Scala code - a convincing case study that high-level functional programming can handily beat C for system ...
Assoc Computing Machinery2015Functional Pearl: A SQL to C Compiler in 500 Lines of Code’
We present the design and implementation of a SQL query processor that outperforms existing database systems and is written in just about 500 lines of Scala code – a convincing case study that high-level functional programming can handily beat C for system ...
2015