Issue 4 of Volume 14 of the Proceedings of the VLDB Endowment (PVLDB) is now available electronically at the VLDB website:

This issue consists of the following papers that have been accepted for the research track of VLDB 2021 in Copenhagen, Denmark in December 2020:

- Space- and Computationally-Efficient Set Reconciliation via Parity Bitmap Sketch (PBS)
Long Gong, Ziheng Liu, Liang Liu, Jun Xu, Mitsunori Ogihara, Tong Yang

- Astrid: Accurate Selectivity Estimation for String Predicates using Deep Learning
Suraj Shetiya, Saravanan Thirumuruganathan, Nick Koudas, Gautam Das

- Compact, Tamper-Resistant Archival of Fine-Grained Provenance
Nan Zheng, Zack Ives

- Rumble: Data Independence for Large Messy Data Sets
Ingo Müller, Ghislain Fourny, Stefan Irimescu, Can Cikis, Gustavo Alonsoüller.pdf

- Capturing and querying fine-grained provenance of preprocessing pipelines in data science
Adriane Chapman, Paolo Missier, Giulia Simonelli, Riccardo Torlone

- Local Dampening: Differential Privacy for Non-numeric Queries via Local Sensitivity
Victor Farias, Felipe Brito, Cheryl Flynn, Javam Machado, Subhabrata Majumdar, Divesh Srivastava

- Mainlining Databases: Supporting Fast Transactional Workloads on Universal Columnar Data File Formats
Tianyu Li, Matthew Butrovich, Amadou Ngom, Wan Shen Lim, Wes Mckinney, Andrew Pavlo

- Accelerating Exact Constrained Shortest Paths on GPUs
Shengliang Lu, Bingsheng He, Yuchen Li, Hao Fu

- Towards an Efficient Weighted Random Walk Domination
Songsong Mo, Zhifeng Bao, Ping Zhang, Zhiyong Peng

- Scalable Mining of Maximal Quasi-Cliques: An Algorithm-System Codesign Approach
Guimu Guo, Da Yan, Tamer Özsu, Zhe Jiang, Jalal Khalil

- CALYPSO: Private Data Management for Decentralized Ledgers
Eleftherios Kokoris Kogias, Enis Ceyhun Alp, Linus Gasser, Philipp Jovanovic, Ewa Syta, Bryan Ford

- Stacked Filters: Learning to Filter by Structure
Brian Hentschel, Stratos Idreos, Kyle Deeds

- Maximizing Social Welfare in a Competitive Diffusion Model
Prithu Banerjee, Laks V.s. Lakshmanan, Wei Chen

- Understanding the Idiosyncrasies of Real Persistent Memory
Shashank Gugnani, Arjun Kashyap, Xiaoyi Lu

- Explaining Ranking Functions
Amelie Marian, Abraham Gale

- ConnectIt: A Framework for Static and Incremental Parallel Graph Connectivity Algorithms
Laxman Dhulipala, Changwan Hong, Julian Shun

- Quality of Sentiment Analysis Tools: The Reasons of Inconsistency
Wissam Mammar Kouadri, Mourad Ouziri, Salima Benbernou, Karima Echihabi, Themis Palpanas, Iheb Benamor

- Hindsight Logging for Model Training
Rolando Garcia, Erick Liu, Vikram Sreekanti, Bobby Yan, Anusha Dandamudi, Joseph Gonzalez, Joseph Hellerstein, Koushik Sen

- Scalable Structural Index Construction for JSON Analytics
Zhijia Zhao, Lin Jiang

- Efficient Join Algorithms For Large Database Tables in a Multi-GPU Environment
Ran Rui, Hao Li, Yi-Cheng Tu

Best regards,

Thorsten Papenbrock, HPI, Germany
Hannes Muehleisen, CWI, The Netherlands
VLDB 2021 Proceedings Chairs