| Vol-2324 urn:nbn:de:0074-2324-4 Copyright © 2019 for the individual papers by the papers' authors. Copying permitted for private and academic purposes. This volume is published and copyrighted by its editors.

# DOLAP 2019 Design, Optimization, Languages and Analytical Processing of Big Data ### Proceedings of the 21st International Workshop on Design, Optimization, Languages and Analytical Processing of Big Data co-located with EDBT/ICDT Joint Conference (EDBT/ICDE 2019) ### Lisbon, Portugal, March 26, 2019. |

Edited by

### Il-Yeol Song *
Oscar Romero **
Robert Wrembel ***

* Drexel University, Philadelphia, USA
** Universitat Politècnica de Catalunya - BarcelonaTech, Barcelona, Spain
*** Poznan University of Technology, Poznan, Poland

## Table of Contents

- Preface
  Il-Yeol Long, Oscar Romero, Robert Wrembel

### Invited talk

- Automating Data Preparation: Can We? Should We? Must We?
  Norman Paton

### Regular papers

- Augmented Business Intelligence
  Matteo Francia, Matteo Golfarelli, Stefano Rizzi
- Qualitative Analysis of the SQLShareWorkload for Session Segmentation
  Verónika Peralta, Willeme Verdeaux, Yann Raimont, Patrick Marcel
- Volunteered Multidimensional Design to the Test: The Farmland Biodiversity VGI4Bio Project's Experiment
  Sandro Bimonte, Stefano Rizzi, Lucile Sautot, Benoit Fontaine
- Profiling User Belief in BI Exploration for Measuring Subjective Interestingness
  Alexandre Chanson, Ben Crulis, Krista Drushku, Nicolas Labroche, Patrick Marcel
- Feedback Driven Improvement of Data Preparation Pipelines
  Nikolaos Konstantinou, Norman Paton
- Optimizing DICOM Data Management with NSGA-G
  Trung-Dung Le, Verena Kantere, Laurent d'Orazio
- Efficient Indexing of Hashtags Using Bitmap Indices
  Lawan Thamsuhang Subba, Christian Thomsen, Torben Bach Pedersen

### Short papers

- A Vision of a Decisional Model for Re-optimizing Query Execution Plans Based on Machine Learning Techniques
  Chenxiao Wang, Zachary Arani, Le Gruenwald, Laurent d'Orazio
- Towards a Benefit-based Optimizer for Interactive Data Analysis
  Patrick Marcel, Nicolas Labroche, Panos Vassiliadis
- Data Pipeline Selection and Optimization
  Alexandre Quemy
- Value-driven Approach for Designing Extended Data Warehouses
  Nabila Berkani, Ladjel Bellatreche, Selma Khouri, Carlos Ordonez
- Enhancing ER Diagrams to View Data Transformations Computed with Queries
  Carlos Ordonez, Ladjel Bellatreche

2019-02-27: submitted by Robert Wrembel, metadata incl. bibliographic data published under Creative Commons CC0
2019-02-28: published on CEUR-WS.org |valid HTML5|