Implicit Parallelization of the Nested Relational Calculus for Semi-Structured Data

Large volumes of data are produced, published and exchanged over the Internet. Such data is often in a semi-structured format which is typically irregular and therefore challenging to analyze. High-level data analysis languages are built on top of implicit parallel data processing platforms that handle distribution of computations and data....

Designing DAWN: A Data Analytics Workflow Notation

Big Data is a popular research and business topic. Due to the potential value that lies in Big Data, much effort is put in attempts to improve Big Data analysis methods. ORTEC is a company that provides data analysis, optimisation, and forecasting solutions. In an attempt to make Big Data analysis easier to use for its customers, ORTEC is...

On the Equivalence of Nested Relational Languages

Query optimization has played a vital role in database research since the 1970’s and up till now. In the relational context, a prerequisite to query optimization is the study of equivalences over relational algebra expressions. Sophisticated techniques for query transformations for traditional query languages include rewriting based...