| Vol-2971 urn:nbn:de:0074-2971-6 Copyright © 2021 for the individual papers by the papers' authors. Copyright © 2021 for the volume as a collection by its editors. This volume and its papers are published under the Creative Commons License Attribution 4.0 International (CC BY 4.0).

# VLDB-PhD 2021
VLDB 2021 PhD Workshop

### Proceedings of the VLDB 2021 PhD Workshop
co-located with the 47th International Conference on Very Large Databases (VLDB 2021)

### Copenhagen, Denmark, August 16, 2021.

Edited by

### Philip A. Bernstein *
Tilmann Rabl **

* Microsoft Research, One Microsoft Way, Redmond, WA, 98052, U.S.A.
** Hasso Plattner Institute, University of Potsdam, Prof.-Dr.-Helmert-Str. 2-3, 14482 Potsdam, Germany

## Table of Contents

- Preface
  Summary: There were 18 papers submitted for peer-review to the VLDB 2021 PhD workshop. Out of these, 12 papers were accepted for this volumes.

### Session 1

- Stream Mining of Complex Event Tensor
  Kota Nakamura
- Exploiting Data Distribution in Distributed Learning of Deep Classification Models under the Parameter Server Architecture
  Nikodimos Provatas
- Integrating Massive Data Streams
  George Siachamis

### Session 2

- Context-Free Path Querying In Terms of Linear Algebra
  Rustam Azimov
- SHACL Constraint Validation during SPARQL Query Processing
  Philipp D. Rohde
- Interactive Data Discovery in Data Lakes
  Andra-Denis Ionescu

### Keynote

- Living in a Candy Store - from being a PhD Student to Working as a Faculty Member on ML for Systems
  Tim Kraska

### Session 3

- Differentiating Relational Queries
  Paul Peseux
- Checking Plausibility in Exploratory Data Analysis
  Hermann Stolte
- Cooperative Techniques for Dealing with Unsatisfactory Answers in RDF Knowledge Bases
  Louise Parkin

### Session 4

- Main Memory Databases Instant Recovery
  Arlino Magalhães
- Enhancing JSON Schema Discovery by Uncovering Hidden Data
  Justin Namba
- Towards an Integrated Solution for IoT Data Management
  Anderson Chaves

2021-10-01: submitted by Tilmann Rabl, metadata incl. bibliographic data published under Creative Commons CC0
2021-10-07: published on CEUR Workshop Proceedings (CEUR-WS.org, ISSN 1613-0073) |valid HTML5|