Disjoint interval partitioning

Disjoint interval partitioning In databases with time interval attributes, query processing techniques that are based on sort-merge or sort-aggregate deteriorate. This happens because for intervals no total order exists and either the start or end point is used for the sorting. Doing so leads to inefficient solutions with lots of unproductive comparisons that do not produce an output tuple. Even if just one tuple with a long interval is present in the data, the number of unproductive comparisons of sort-merge and sort-aggregate gets quadratic. In this paper we propose disjoint interval partitioning ( $$\mathcal {DIP}$$ DIP ), a technique to efficiently perform sort-based operators on interval data. $$\mathcal {DIP}$$ DIP divides an input relation into the minimum number of partitions, such that all tuples in a partition are non-overlapping. The absence of overlapping tuples guarantees efficient sort-merge computations without backtracking. With $$\mathcal {DIP}$$ DIP the number of unproductive comparisons is linear in the number of partitions. In contrast to current solutions with inefficient random accesses to the active tuples, $$\mathcal {DIP}$$ DIP fetches the tuples in a partition sequentially. We illustrate the generality and efficiency of $$\mathcal {DIP}$$ DIP by describing and evaluating three basic database operators over interval data: join, anti-join and aggregation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The VLDB Journal Springer Journals

Disjoint interval partitioning

Loading next page...
Springer Berlin Heidelberg
Copyright © 2017 by Springer-Verlag Berlin Heidelberg
Computer Science; Database Management
Publisher site
See Article on Publisher Site


You’re reading a free preview. Subscribe to read the entire article.

DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.



billed annually
Start Free Trial

14-day Free Trial