Wolfgang Lehner

Publications
Influence

The SAP HANA Database -- An Architecture Overview

F. Färber, N. May, +4 authors J. Dees
Computer Science
IEEE Data Eng. Bull.
2012

In this paper we highlight the architectural concepts employed in the SAP HANA database. Expand

SAP HANA database: data management for modern business applications

F. Färber, S. K. Cha, Jürgen Primsch, Christof Bornhövd, Stefan Sigg, Wolfgang Lehner
Computer Science
SGMD
11 January 2012

SAP HANA database is positioned as the core of the SAP HANA Appliance to support complex business analytical processes in combination with transactionally consistent operational workloads. Expand

FPTree: A Hybrid SCM-DRAM Persistent and Concurrent B-Tree for Storage Class Memory

Ismail Oukid, Johan Lasperas, A. Nica, Thomas Willhalm, Wolfgang Lehner
Computer Science
SIGMOD Conference
14 June 2016

We propose a novel hybrid SCM-DRAM persistent and concurrent B-Tree, named Fingerprinting Persistent Tree (FPTree) that achieves similar performance to DRAM-based counterparts. Expand

Efficient transaction processing in SAP HANA database: the end of a column store myth

Vishal Sikka, F. Färber, Wolfgang Lehner, S. K. Cha, Thomas Peh, Christof Bornhövd
Computer Science
SIGMOD Conference
20 May 2012

The SAP HANA database is the core of SAP's new data management platform. Expand

Normal forms for multidimensional databases

Wolfgang Lehner, J. Albrecht, H. Wedekind
Computer Science
Proceedings. Tenth International Conference on…
1 July 1998

In the area of online analytical processing (OLAP), the concept of multidimensional databases is receiving much popularity. Expand

Modelling Large Scale OLAP Scenarios

Wolfgang Lehner
Computer Science
EDBT
23 March 1998

We extend the classical multidimensional model by grouping functionally dependent attributes within single dimensions, yielding in real orthogonal dimensions, which are easy to create and maintain on schema design level. Expand

Building the Dresden Web Table Corpus: A Classification Approach

Julian Eberius, Katrin Braunschweig, Markus Hentsch, M. Thiele, A. Ahmadov, Wolfgang Lehner
Computer Science
IEEE/ACM 2nd International Symposium on Big Data…
1 December 2015

In recent years, researchers have recognized relational tables on the Web as an important source of information. Expand

Representing Data Quality in Sensor Data Streaming Environments

Anja Klein, Wolfgang Lehner
Computer Science
JDIQ
1 September 2009

We address this problem by presenting a flexible model for the propagation and processing of data quality. Expand

Cache-Efficient Aggregation: Hashing Is Sorting

Ingo Müller, P. Sanders, Arnaud Lacurie, Wolfgang Lehner, F. Färber
Computer Science
SIGMOD Conference
27 May 2015

In this paper we argue that in terms of cache efficiency, the two paradigms are actually the same. Expand

Efficient exploitation of similar subexpressions for query processing

Jingren Zhou, P. Larson, J. Freytag, Wolfgang Lehner
Computer Science
SIGMOD '07
11 June 2007

We present an efficient, scalable, and principled solution to this long-standing optimization problem. Expand

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