In this paper, we revisit two fundamental problems in database theory. The first one is called join dependency (JD) testing, where we are given a relation r and a JD, and need to...
Locality Sensitive Hashing (LSH) has emerged as the method of choice for high dimensional similarity search, a classical problem of interest in numerous applications. LSH-based so...
This paper investigates the feasibility of querying big data by accessing a bounded amount of the data. We study boundedly evaluable queries under a form of access constraints, wh...
Wenfei Fan, Floris Geerts, Yang Cao, Ting Deng, Pi...
The inversion of data exchange mappings is one of the thorniest issues in data exchange. In this paper we study inverse data exchange from a novel perspective. Previous work has d...
A growing body of work addresses the challenge of processing dynamic graph streams: a graph is defined by a sequence of edge insertions and deletions and the goal is to construct...
This paper aims to understand the I/O-complexity of maintaining a big sample set—whose size exceeds the internal memory’s capacity—on a data stream. We study this topic in a...
We study in this paper the computation of skyline queries - a popular tool for multicriteria data analysis - in the presence of noisy input. Motivated by crowdsourcing application...