25th International Conference on Database Systems for Advanced Applications

Sep. 24-27, 2020, Jeju, South Korea

25th International Conference on

Database Systems for Advanced Applications

Sep. 24-27, 2020, Jeju, South Korea



Keynote speakers


Keynote Speech1 : A Wakeup Call: Databases in an Untrusted Universe

Location : Diamond, Friday, 10:00 - 11:00

Amr El Abbadi

Department of Computer Science,

University of California, Santa Barbara


• Abstract

Once upon a time databases were structured, one size fit all and they resided on machines that were trustworthy and even when they failed, they simply crashed. This era has come and gone as eloquently stated by Mike Stonebraker. We now have key-value stores, graph databases, text databases, and a myriad of unstructured data repositories. However, we, as a database community still cling to our 20th century belief that databases always reside on trustworthy, honest servers. This notion has been challenged and abandoned by many other Computer Science communities, most notably the security and the distributed systems communities. The rise of the cloud computing paradigm as well as the rapid popularity of blockchains demand a rethinking of our naive, comfortable beliefs in an ideal benign infrastructure. In the cloud, clients store their sensitive data in remote servers owned and operated by cloud providers. The Security and Crypto Communities have made significant inroads to protect both data and access privacy from malicious untrusted storage providers using encryption and oblivious data stores. The Distributed Systems and the Systems Communities have developed consensus protocols to ensure the fault-tolerant maintenance of data residing on untrusted, malicious infrastructure. However, these solutions face significant scalability and performance challenges when incorporated in large scale data repositories. Novel database designs need to directly address the natural tension between performance, fault-tolerance and trustworthiness. This is a perfect setting for the database community to lead and guide. In this talk, I will discuss the state of the art in terms of data management in malicious, untrusted settings, its limitations and potential approaches to mitigate these shortcomings. As examples, I will use cloud and distributed databases that reside on untrustworthy malicious infrastructure and discuss specific approaches for standard database problems like commitment and replication. I will also explore blockchains, which can be viewed as asset management databases in untrusted infrastructures.



• Bio

Amr El Abbadi is a Professor of Computer Science at the University of California, Santa Barbara. He received his B. Eng. from Alexandria University, Egypt, and his Ph.D. from Cornell University. His research interests are in the fields of fault-tolerant distributed systems and databases, focusing recently on Cloud data management and blockchain based systems. Prof. El Abbadi is an ACM Fellow, AAAS Fellow, and IEEE Fellow. He was Chair of the Computer Science Department at UCSB from 2007 to 2011. He has served as a journal editor for several database journals, including, The VLDB Journal, IEEE Transactions on Computers and The Computer Journal. He has been Program Chair for multiple database and distributed systems conferences. He currently serves on the executive committee of the IEEE Technical Committee on Data Engineering (TCDE) and was a board member of the VLDB Endowment from 2002 to 2008. In 2007, Prof. El Abbadi received the UCSB Senate Outstanding Mentorship Award for his excellence in mentoring graduate students. In 2013, his student, Sudipto Das received the SIGMOD Jim Gray Doctoral Dissertation Award. Prof. El Abbadi is also a co-recipient of the Test of Time Award at EDBT/ICDT 2015. He has published over 300 articles in databases and distributed systems and has supervised over 35 PhD students.


Keynote Speech 2 : No Data Left Behind – Exploiting Unstructured Data Using Database Systems

Location : Diamond, Friday, 14:00 - 15:00

Wolfgang Lehner

Institute of System Architecture

Technische Universität Dresden (TU Dresden)


• Abstract

In our data-driven culture, more and more data sources of semi-structured or unstructured nature are getting incorporated into decision workflows. However, relational database systems are still the “lingua franca” for data storage, query processing, and large-scale analytics in almost every organization and they will probably remain for the next decades. Tapping into the value of unstructured data in the realm of databases systems remains a challenging task. In this talk, I will present our journey of building database-centric systems that are able to exploit external knowledge during query processing with an emphasis on Web tables and spreadsheets as well as textual documents. I will introduce the problem of table extraction and layout identification, giving an idea on how to solve it and present our initiative on building a corpus consisting of more than 125M Web tables. The extracted tables can be leveraged using relational augmentation techniques integrated into a database system by introducing a novel database engine operator dealing with top-k results. For textual data, I will report on recent developments in the field of language models such as word embeddings and outline how this can be utilized to enrich database query capabilities and enabling inductive reasoning on text values stored in database tables.



• Bio

Wolfgang Lehner is full professor and head of the Database Technology Group as well as director of the Institute of System Architecture at TU Dresden, Germany. His research focuses on database system architectures specifically looking at crosscutting aspects from data engineering algorithms and data structures down to hardware-related aspects mostly in main-memory centric settings. He is heading a Research Training Group on large-scale adaptive system software design and acts as a principal investigator in Germany’s national “Competence Center for Scalable Data Services and Solutions” (ScaDS). Wolfgang also maintains a close research relationship with the international SAP HANA development team. He serves the community in many PCs, is the Managing Editor of “Proceedings of the VLDB Endowment” (PVLDB), and serves on the grants committee of collaborative research centers within the German Research Foundation (DFG). He is an appointed member of the Academy of Europe.


Keynote Speech 3 : In-NVM DBMS – Is There A Case?

Location : Diamond, Saturday, 10:00 - 11:00

Kian-Lee Tan

Department of Computer Science

National University of Singapore (NUS)


• Abstract

Today’s database management systems are essentially based on a two-layered storage architecture: (a) data are stored on cheap (and high capacity but slow) persistent storage like solid state drives (NAND flash) or magnetic disks; and (b) data are loaded and processed in volatile (and fast but expensive) DRAM. More recently, the emergence of byte-addressable non-volatile memory (NVM) technologies, such as Intel/Micron’s 3D-XPoint memory and phase change memory (PCM), has prompted researches to investigate how best to exploit this technology for database systems. On one hand, NVM can be used as a form of persistent cache for disks so that “hot” data can be stored on NVM, while “cold” data on disks (leading to a 3-tier storage). On the other hand, it is not impossible to have just a single level storage architecture by replacing DRAM with NVM; given NVM is non-volatile, the persistent storage tier can also be removed. This talk focuses on the latter, and examines the opportunities and challenges in building an in-nvm database management system.



• Bio

Kian-Lee Tan is a Professor of Computer Science at the School of Computing, National University of Singapore (NUS). He received his Ph.D. in computer science in 1994 from NUS. His current research interests include query processing and optimization in multiprocessor and distributed systems, database performance, data science, and database security. Kian-Lee has published over 300 research articles in international journals and conference proceedings, and co-authored several books/monographs. Kian-Lee was a recipient of the NUS Outstanding University Researchers Award in 1998, and the NUS Graduate School (NGS) Excellent Mentor Award in 2011. He was a co-recipient of Singapore's President Science Award in 2011. He is also a 2013 IEEE Technical Achievement Award recipient. Kian-Lee is a member of the VLDB Endowment Board (2012-2017) and PVLDB Advisory Committee (2014-2017). He is an associate editor of the ACM Transactions on Database Systems (TODS) and the WWW Journal. He has also served in the editorial board of the Very Large Data Base (VLDB) Journal (associate editor: 2007-2009; editor-in-chief: 2009-2015) and the IEEE Transactions on Knowledge and Data Engineering (2009-2013). Kian-Lee was the Technical Program Committee co-chair for the 27th International Conference on Data Engineering (ICDE 2011), the 36th International Conference on Very Large Data Bases (VLDB 2010), the 11th International Conference on Database Systems for Advanced Applications (DASFAA 2006) and 3rd International Conference on Mobile Data Management (MDM 2002). He has also served as a member of Steering Committee of DASFAA (2005-2010). Kian-Lee is a member of ACM and a senior member of the IEEE.


Keynote Speech 4 : Data Science in University: Yet Another Silo or A Hub for Transformation of Education?

Location : Diamond, Saturday, 14:00 - 15:00

Sang Kyun Cha

Founding Dean of Graduate School of Data Science

Seoul National University


• Abstract

With the advances of computing, big data, and artificial intelligence, data science is emerging as a new essential scientific discipline for almost all academic disciplines and industrial sectors. Many universities around the world adopt data science in their academic program in one way or another. The question is how we establish data science within university: yet another silo or a vehicle for broader transformation of university education. Funded or stimulated by Moore and Sloan foundations, a small number of US universities started experimenting with the creation of new academic programs on data science from 2013. Around the same time, Seoul National University started an independent journey of experiments on university-wide data science education and research. This journey resulted in SNU establishing its new Graduate School of Data Science in 2020 with new faculty headcounts, to formalize transformative education and create a hub for leading such education. In this talk, I will present the lessons learned from this journey as well as the vision.



• Bio

Sang Kyun Cha is a professor, an innovator, and an entrepreneur. He worked on three generations of commercialized in-memory database technology since he joined Seoul National University in 1992. In 2000, he founded Transact In Memory, Inc. with his vision of developing an enterprise in-memory database system called P*TIME (Parallel* Transact-In-Memory Engine). The company was quietly acquired by SAP in late 2005. By early 2006, Prof. Cha’s team completed P*TIME development with an innovative OLTP scalability architecture: parallel logging and recovery, MVCC, optimistic latch-free index concurrency control, and support of seamless two-tier access resilient to application crash as well as three-tier access. His team also tightly integrated P*TIME with SAP’s middleware and application stack and demonstrated its extreme scalability. With SAP’s in-house column store TREX, P*TIME served as a corner stone of developing SAP HANA, the first distributed enterprise in-memory database system enabling real-time analytics over transactionally integrated row and column stores. Today, SAP and many other companies run ERP, CRM, business warehouse on HANA. By SAP’s request, Prof. Cha led SAP’s Korean HANA development. In April 2014, Prof. Cha launched Seoul National University’s Big Data Institute to lead trans-disciplinary big data research involving almost all academic disciplines including computer science, engineering, natural and social science, and medicine. He has been on the board of trustees of Seoul National University since December 2014. He has been on the board of Korea Telecom since March 2012, and is providing strategic advice to central and local governments on big data and software industry issues. He is on the editorial board of VLDB Journal since 2009 and was elected as a member of IEEE ICDE Steering committee in 2015. Prof. Cha received his BS and MS from Seoul National University and his Ph.D. from Stanford University.



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