Publication

Efficient Semi-structured Queries in Scala using XQuery Shipping

2006
Student Projects

Abstract

This project proposes a new approach to interact with database systems through programming languages. A formal query language can be integrated within modern programming languages and the semi-structured queries can be evaluated using automatic transformation and query shipping. The focus of this project is on XML queries and Scala programming language. Particularly, this project optimizes the XML-based expressions of Scala using XQuery transformation and Shipping. In this work, Scala sequence comprehensions are extended to cover appropriately the whole functionalities of XQuery FLWOR expressions and XQuery sequence comparisons are introduced in Scala to facilitate query generation. This report presents a formalization of transformation rules between Scala and XQuery languages and describes an Scala implementation. Various use cases are provided to facilitate understanding and employing this newest Scala library.

Official source

https://infoscience.epfl.ch/entities/publication/9eb36cd7-7025-42f4-bbaa-cc0948f74a1e

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2006
Student Projects

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9eb36cd7-7025-42f4-bbaa-cc0948f74a1e

About this result

Related concepts (32)

Scala (programming language)

Scala (ˈskɑːlə ) is a strong statically typed high-level general-purpose programming language that supports both object-oriented programming and functional programming. Designed to be concise, many of Scala's design decisions are aimed to address criticisms of Java. Scala source code can be compiled to Java bytecode and run on a Java virtual machine (JVM). Scala can also be compiled to JavaScript to run in a browser, or directly to a native executable.

XQuery

XQuery (XML Query) is a query and functional programming language that queries and transforms collections of structured and unstructured data, usually in the form of XML, text and with vendor-specific extensions for other data formats (JSON, binary, etc.). The language is developed by the XML Query working group of the W3C. The work is closely coordinated with the development of XSLT by the XSL Working Group; the two groups share responsibility for XPath, which is a subset of XQuery. XQuery 1.

Comparison of programming languages

Programming languages are used for controlling the behavior of a machine (often a computer). Like natural languages, programming languages follow rules for syntax and semantics. There are thousands of programming languages and new ones are created every year. Few languages ever become sufficiently popular that they are used by more than a few people, but professional programmers may use dozens of languages in a career. Most programming languages are not standardized by an international (or national) standard, even widely used ones, such as Perl or Standard ML (despite the name).

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