| Vol-3931 urn:nbn:de:0074-3931-X Copyright © 2025 for the individual papers by the papers' authors. Copyright © 2025 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).

# DOLAP 2025
Design, Optimization, Languages and Analytical Processing of Big Data 2025

### Proceedings of the 27th International Workshop on Design, Optimization, Languages and Analytical Processing of Big Data (DOLAP 2025)
co-located with the 28th International Conference on Extending Database Technology and the 28th International Conference on Database Theory (EDBT/ICDT 2025)

### Barcelona, Spain, March 25, 2025.

Edited by

### Alejandro Maté *
Matteo Lissandrini **

* University of Alicante, Spain
** University of Verona, Italy

## Table of Contents

- Preface
  Alejandro Maté, Matteo Lissandrini

### Regular papers

- Impact Study of NoSQL Refactoring in SkyServer Database 1-11
  Enrico Gallinucci, Matteo Golfarelli, Wafaa Radwan, Gabriel Zarate, Alberto Abelló
- Finding comparison insights in multidimensional datasets 12-21
  Patrick Marcel, Claire Antoine, Alexandre Chanson, Nicolas Labroche
- Counterfactual Explanations for Group Recommendations 22-30
  Maria Stratigi, Nikos Bikakis, Kostas Stefanidis
- Entity Matching with 7B LLMs: A Study on Prompting Strategies and Hardware Limitations 31-38
  Ioannis Arvanitis-Kasinikos, George Papadakis
- Optimizing Big Active Data Management Systems 39-48
  Shahrzad Haji Amin Shirazi, Xikui Wang, Michael Carey, Vassilis Tsotras

### Short papers

- A Diversity-aware Approach to Bundle Recommendations 49-53
  Nastaran Ebrahimi, Zheying Zhang, Kostas Stefanidis
- Causal Banzhaf Value for aggregate query explanations 54-58
  Pouya Khani, Ira Assent
- The Case for Instance-Optimized LLMs in OLAP Databases 59-63
  Bardia Mohammadi, Laurent Bindschaedler
- Using ChatGPT to refine draft conceptual schemata in supply-driven design of multidimensional cubes 64-68
  Stefano Rizzi
- Beyond Row Counts: Enhancing Workload-Aware Data Synthesis 69-73
  Anupam Sanghi
- Workload Cost Optimization Using Dynamic Replication in Decentralized Systems 74-78
  Ryoga Yoshida, Chuan Xiao, Makoto Onizuka
- Exploring Content-Based Catalogs for Enhanced Discovery Services in Data Spaces 79-84
  Adriana Morejón, Alberto Berenguer, Lucía de Espona, David Tomás, Jose-Norberto Mazón

### Panel papers

- Challenges to Enforce Data Quality in Data Spaces 85-87
  Claudia Ayala, Besim Bilalli, Cristina Gómez, Jose-Norberto Mazón, Oscar Romero
- Toward Advanced Query Processing in Dataspaces 88-90
  Christoph Quix
- Data Analytics and Artificial Intelligence in the new scenario of Data Spaces 91-92
  Juan Trujillo, Gustavo Candela, Alejandro Reina-Reina

2025-02-25: submitted by Alejandro Maté, Matteo Lissandrini, metadata incl. bibliographic data published under Creative Commons CC0
2025-02-25: published on CEUR Workshop Proceedings (CEUR-WS.org, ISSN 1613-0073) |valid HTML5|