Christoph Koch

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Publications associées (52)

Approximation Schemes for Many-Objective Query Optimization

Immanuel Trummer, Christoph Koch

The goal of multi-objective query optimization (MOQO) is to find query plans that realize a good compromise between conflicting objectives such as minimizing execution time and minimizing monetary fees in a Cloud scenario. A previously proposed exhaustive ...

2014

Building Efficient Query Engines in a High-Level Language

Tiark Rompf, Christoph Koch, Ioannis Klonatos, Hassan Chafi

In this paper we advocate that it is time for a radical rethinking of database systems design. Developers should be able to leverage high-level programming languages without having to pay a price in efficiency. To realize our vision of abstraction without ...

2014

Quantum Databases

Christoph Koch

2013

Automatic Synthesis of Out-of-Core Algorithms

Viktor Kuncak, Andres Nötzli, Andrej Spielmann, Christoph Koch, Ioannis Klonatos

We present a system for the automatic synthesis of efficient algorithms specialized for a particular memory hierarchy and a set of storage devices. The developer provides two independent inputs: 1) an algorithm that ignores memory hierarchy and external st ...

ACM Press2013

Sparse projections onto the simplex

Volkan Cevher, Anastasios Kyrillidis, Christoph Koch

Most learning methods with rank or sparsity constraints use convex relaxations, which lead to optimization with the nuclear norm or the`1-norm. However, several important learning applications cannot benet from this approach as they feature these convex no ...

JMLR W&CP2013

Loop Elimination for Database Updates

Christoph Koch

2013

Fine-grained disclosure control for app ecosystems

Christoph Koch

The modern computing landscape contains an increasing number of app ecosystems, where users store personal data on platforms such as Facebook or smartphones. APIs enable third-party applications (apps) to utilize that data. A key concern associated with ap ...

ACM Press2013

DBToaster: Higher-order Delta Processing for Dynamic, Frequently Fresh Views

Milos Nikolic, Christoph Koch, Yanif Ahmad

Applications ranging from algorithmic trading to scientific data analysis require realtime analytics based on views over databases that change at very high rates. Such views have to be kept fresh at low maintenance cost and latencies. At the same time, the ...

2012

Guest Editors' Introduction to the Special Section on the 27th International Conference on Data Engineering (ICDE 2011)

Christoph Koch

Institute of Electrical and Electronics Engineers2012

Coordination through querying in the Youtopia system

Christoph Koch

2011

Entangled queries: enabling declarative data-driven coordination

Christoph Koch

Many data-driven social and Web applications involve collaboration and coordination. The vision of Declarative Data-Driven Coordination (D3C), proposed in Kot et al. [2010], is to support coordination in the spirit of data management: to make it data-centr ...

Assoc Computing Machinery2011

Agile Views in a Dynamic Data Management System

Christoph Koch, Yanif Ahmad

This paper calls for a new breed of lightweight systems - dynamic data management systems (DDMS). In a nutshell, a DDMS manages large dynamic data structures with agile, frequently fresh views, and provides a facility for monitoring these views and trigger ...

2011

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