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An Effective Framework for Processing OODB Languages

An Effective Framework for Processing OODB Languages
处理 OODB 语言的有效框架
批准号:
9509955
负责人:
David Maier
金额:
$20.2万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
1995
资助国家:
美国
项目状态:
已结题
起止时间:
1995-09-01 至 1999-08-31

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中文摘要
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英文摘要
A much-touted advantage of the relational data model is the existence of a formal calculus and algebra to model database queries. In practice, these formalisms fail to model many of the features present in commercial query languages (e.g., SQL): grouping, aggregation, duplicate values, and sort orders. The gap only widens as one moves to object- oriented query languages, such as OQL of ODMG-93, which must deal with multiple bulk (collection) types, arbitrary nesting of type constructors, methods and embedded query expressions. Such features also appear in relational query language standards proposals, such as SQL3. This work addresses efficient query processing for modern database languages. It seeks to demonstrate through prototype implementation that new language features can be handled more effectively if these features have direct support in a query calculus. The research framework is based on such a calculus, called the monoid comprehension calculus. Instead of starting from relational algebra and making extensions, our formal model represents naturally the new emerging features of database lang uages. A successful outcome for the research will lead to a better basis for implementing the query processors of commercial database systems, both of pure object-oriented models and relational-object
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III: Large: Collaborative Research: SciDB - An Array Oriented Data Management System for Massive Scale Scientific Data
  • 批准号:
    1110917
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $36.53万
  • 财政年份:
    2011
  • 负责人:
    David Maier
  • 依托单位:
III: Medium: Collaborative Research: Database-As-A-Service for Long Tail Science
  • 批准号:
    1064685
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $22.5万
  • 财政年份:
    2011
  • 负责人:
    David Maier
  • 依托单位:
Exploiting Live Plus Archive Data for Intelligent Transportation Systems
  • 批准号:
    0612311
  • 项目类别:
    Standard Grant
  • 资助金额:
    $41.07万
  • 财政年份:
    2006
  • 负责人:
    David Maier
  • 依托单位:
DELOS/NSF Study Panel on Information Extraction from Digital Libraries
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