It is our great pleasure to welcome you to the 38th ACM SIGMOD-SIGACT-SIGAI Symposium
on Principles of Database Systems (PODS 2019), held in Amsterdam, The Netherlands, on July 1-
3, 2019, in conjunction with the 2019 ACM SIGMOD International Conference on Management
of Data.
Since the first edition of the symposium in 1982, the PODS papers are distinguished by a
rigorous approach to widely diverse problems in data management, often bringing to bear
techniques from a variety of different areas, including computational logic, finite model theory,
computational complexity, algorithm design and analysis, programming languages, and artificial
intelligence.
The PODS Symposia study data management challenges in a variety of application contexts,
including more recently parallel computation, streaming and realtime data, and graph data
processing algorithms. PODS has a tradition of being the premier international conference on
the theoretical and foundational aspects of data management, and the interested reader is
referred to the web page https: //databasetheory.org/pods for information on the history of this
conference series.
This year's symposium continues this tradition and invited for submission papers providing
original, substantial contributions in one or more of the following categories:
a) deep theoretical exploration of topical areas central to data management;
b) new formal frameworks that aim at providing a basis for deeper theoretical investigation of
important emerging issues in data management; and
c) validation of theoretical approaches from the lens of practical applicability in data
management. Papers in this track should provide an experimental evaluation that gives new
insight in established theories. Besides, they should provide a clear message to the database
theory community as to which aspects need further (theoretical) investigation, based on the
experimental findings.
As in previous years, PODS operated with two submission cycles. The first cycle allowed for the
possibility for papers to be revised and resubmitted. For the first cycle, 36 papers were
submitted, 4 of which were directly selected for inclusion in the proceedings, and 8 were invited
for a resubmission after a revision. The quality of the revised papers increased substantially with
respect to the first submission, and all of the revised papers were selected for the proceedings.
For the second cycle, 51 papers were submitted, 17 of which were selected, resulting in 29 papers
selected overall from a total number of 87 submissions.
This volume contains the proceedings of PODS 2019, which include papers on the keynote
addressed by Cynthia Dwork of Harvard University, the two invited tutorials, one of the two
Gems talks, and 29 contributions that were selected by the Program Committee for presentation
at the symposium.
