'Query rewriting' presentation slideshows

Scientific Data & Workflow Engineering Preliminary Notes from the Cyberinfrastructure Trenches

UC DAVIS Department of Computer Science. San Diego Supercomputer Center. Scientific Data & Workflow Engineering Preliminary Notes from the Cyberinfrastructure Trenches. Associate Professor Dept. of Computer Science & Genome Center University of California, Davis Fellow

849 views • 76 slides

Ian Horrocks Information Systems Group Department of Computer Science University of Oxford

733 views • 65 slides

Lecture 14: Query Optimization

534 views • 53 slides

Hadoop & Cheetah

Hadoop & Cheetah. Key words . Cluster ? data center Lots of machines thousands Node ? a server in a data center Commodity device fails very easily Slot ? a fraction of a server Allows you to share a server among many jos Job ? an application that the user wants to run

465 views • 31 slides

The ICAN Prototype

389 views • 29 slides

SPARQL Query Rewriting for Implementing Data Integration over Linked Data

SPARQL Query Rewriting for Implementing Data Integration over Linked Data. Gianluca Correndo, Manuel Salvadores, Ian Millard, Hugh Glaser, Nigel Shadbolt. Linked Data access. Retrieving RDF content via HTTP requests Instance based vs. schema based access Accessing SPARQL endpoints

446 views • 29 slides

Join Synopses for Approximate Query Answering

Join Synopses for Approximate Query Answering. Swarup Acharya Phillip B. Gibbons Viswanath Poosala Sridhar Ramaswamy Presented By Vinay Hoskere. Contents. Introduction AQUA Problem with joins Join synopses Allocation Maintenance of join synopses Experimental Evaluation.

300 views • 20 slides

A View Based Security Framework for XML

A View Based Security Framework for XML. Wenfei Fan, Irini Fundulaki, Floris Geerts, Xibei Jia, Anastasios Kementsietsidis University of Edinburgh Digital Curation Center. Introduction. XML data management

268 views • 19 slides

Invitational Workshop on Database and Information Systems Research For Semantic Web and Enterprises Amit Sheth & R

278 views • 17 slides

Toward Next Generation Search: Business, Product, Science, Infrastructure, and Talent

Toward Next Generation Search: Business, Product, Science, Infrastructure, and Talent. William I. Chang Chief Scientist Baidu.com wchang @ baidu.com. History. Outline. Synopsis of Web search evolution Themes and principles Challenges and opportunities

274 views • 17 slides

CSE 636 Data Integration

CSE 636 Data Integration. Answering Queries Using Views MiniCon Algorithm. The MiniCon Algorithm. Concentrate on variables rather than subgoals to create MiniCon Descriptions (MCDs) Combine MCDs that only overlap on distinguished view variables No containment check!. MiniCon Example.

141 views • 14 slides