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SIGMOD Edgar F. Codd Innovations Award

For innovative and highly significant contributions of enduring value to the development, understanding, or use of database systems and databases. Until 2003, this award was known as the “SIGMOD Innovations Award.” In 2004, SIGMOD, with the unanimous approval of ACM Council, decided to rename the award to honor Dr. E.F. (Ted) Codd (1923 – 2003) who invented the relational data model and was responsible for the significant development of the database field as a scientific discipline.

 2017 2016
  gerhardweikum
 Goetz Graefe Gerhard Weikum
 [citation] [citation]
2015 2014 2013
Laura Haas3 Martin Kersten Stefano_Ceri
Laura Haas Martin Kersten Stefano Ceri
[citation] [citation] [citation]
2012 2011 2010
Bruce Lindsay Surajit_Chaudhuri Umeshwar_Dayal
Bruce Lindsay Surajit Chaudhuri Umeshwar Dayal
[citation] [citation] [citation]
2009 2008 2007
masaru
Masaru Kitsuregawa Moshe Y. Vardi Jennifer Widom
[citation] [citation] [citation]
2006 2005 2004
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Jeffrey D. Ullman Michael Carey Ronald Fagin
[citation] [citation] [citation]
2003 2002 2001
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Don Chamberlin Patricia Selinger Rudolf Bayer
[citation] [bio] [bio]
2000 1999 1998
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Rakesh Agrawal Hector Garcia-Molina Serge Abiteboul
[bio] [bio] [bio]
1997 1996 1995
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David Maier C. Mohan David DeWitt
[bio] [bio] [bio]
1994 1993 1992
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Philip Bernstein Jim Gray Michael Stonebraker
[bio] [bio] [bio]

SIGMOD Systems Award

The SIGMOD Systems Award is awarded to an individual or set of individuals to recognize the development of a software or hardware system whose technical contributions have had significant impact on the theory or practice of large-scale data management systems.

2016 2015
fotoSep2014 Michael Stonebraker2   Lawrence Rowe
Martin Kersten Michael Stonebraker and Lawrence Rowe
[citation] [citation]

SIGMOD Contributions Award

For significant contributions to the field of database systems through research funding, education, and professional services. Recipients of the award are the following:

 2017 2016
 
Yannis E. Ioannidis Samuel Madden
[citation] [citation]
2015 2014 2013
Curtis Dyreson Kyu-Young Whang H. V. Jagadish
Curtis Dyreson Kyu-Young Whang H. V. Jagadish
[citation] [citation] [citation]
2012 2011 2010
Marianne Winslett Gerhard_Weikum David_Lomet
Marianne Winslett Gerhard Weikum David Lomet
[citation] [citation] [citation]
2009 2008 2007
Beng image_preview image_preview
Beng Chin Ooi Klaus R. Dittrich Hans-Jörg Schek
[citation] [citation] [citation]
2006 2005 2004
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Tamer Özsu Hongjun Lu Surajit Chaudhuri
[citation]  [citation] [citation]
2003 2002 2001
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Michael Ley Richard Snodgrass Daniel Rosenkrantz
[citation] [citation] [bio]
2000 (co-winner) 2000 (co-winner) 1999
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Laura Haas Michael Carey Raghu Ramakrishnan
[bio] [bio] [bio]
1998 1997 1996
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Won Kim Avi Silberschatz Jeffrey Ullman
[bio] [bio] [bio]
1995 (co-winner)  1995 (co-winner) 1992
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Yahiko Kambayashi Gio Wiederhold Maria Zemankova
[bio] [bio] [bio]

 

SIGMOD Best Paper Award

Recipients of the award are the following:

2016 Wander Join: Online Aggregation via Random Walks. Feifei Li, Bin Wu, Ke Yi, Zhuoyue Zhao
2015 DBSCAN Revisited: Mis-Claim, Un-Fixability, and Approximation. Yufei Tao, Junhao Gan
2014 Materialization Optimizations for Feature Selection Workloads. Ce Zhang, Arun Kumar, Christopher Ré
2013 Massive Graph Triangulation. Xiaocheng Hu, Yufei Tao, Chin-Wan Chung
2012 High-Performance Complex Event Processing over XML Streams. Barzan Mozafari, Kai Zeng, Carlo Zaniolo
2011 Entangled Queries: Enabling Declarative Data-Driven Coordination. Nitin Gupta, Lucja Kot, Sudip Roy, Gabriel Bender, Johannes Gehrke, Christoph Koch
2010 FAST: Fast Architecture Sensitive Tree Search on Modern CPUs and GPUs. Changkyu Kim, Jatin Chhugani, Nadathur Satish, Eric Sedlar, Anthony Nguyen, Tim Kaldewey, Victor Lee, Scott Brandt, and Pradeep Dubey [award citation]
2009 Generating Example Data for Dataflow Programs. Christopher Olston, Shubham
Chopra, and Utkarsh Srivastava
Runner-up: An Architecture for Recycling Intermediates in a Column-Store. Milena G. Ivanova,
Martin L. Kersten, Niels J. Nes, and Romulo A.P. Goncalves
2008 Serializable Isolation for Snapshot Databases. Michael Cahill, Uwe Roehm, and Alan Fekete
Scalable Network Distance Browsing in Spatial Databases. Hanan Samet, Jagan Sankaranarayanan, and Houman Alborzi
2007 Compiling Mappings to Bridge Applications and Databases. Sergey Melnik, Atul Adya, and Philip Bernstein
Scalable Approximate Query Processing with the DBO Engine. Christopher Jermaine, Subramanian Arumugam, Abhijit Pol, and Alin Dobra
2006 To Search or to Crawl? Towards a Query Optimizer for Text-Centric Tasks. Panagiotis Ipeirotis, Eugene Agichtein, Pranay Jain, and Luis Gravano
2004 Indexing Spatio-Temporal Trajectories with Chebyshev Polynomials. Raymond Ng and Yuhan Cai
2003 Spreadsheets in RDBMS for OLAP. Abhinav Gupta, Andy Witkowski, Gregory Dorman, Srikanth Bellamkonda, Tolga Bozkaya, Nathan Folkert, and Lei Sheng
2001 Locally Adaptive Dimensionality Deduction for Indexing Large Time Series Databases. Eamonn Keogh, Kaushik Chakrabarti, Sharad Mehrotra, and Michael Pazzani
2000 XMill: An Efficient Compressor for XML data. Hartmut Liefke and Dan Suciu
1999 DynaMat: A Dynamic View Management System for Data Warehouses. Yannis Kotidis and Nick Roussopoulos
1998 Efficient Transparent Application Recovery in Client Server Information Systems. David Lomet and Gerhard Weikum
Integrating Association Rule Mining with Relational Database Systems: Alternatives and Implications. Sunita Sarawagi, Shiby Thomas, and Rakesh Agrawal
1997 Fast Parallel Similarity Search in Multimedia Databases. Stefan Berchtold, Christian Bohm, Bernhard Braunmuller, Daniel Keim, and Hans Peter Kriegel
1996 Implementing Data Cubes Efficiently. Venky Harinarayan, Anand Rajaraman, and Jeffrey Ullman
1994 Fast Subsequence Matching in Time-Series Databases. Christos Faloutsos, M. Ranganathan, and Yannis Manolopoulos
AlphaSort: A RISC Machine Sort. Chris Nyberg, Tom Barclay, Zarka Cvetanovic, Jim Gray, and David Lomet

SIGMOD Test of Time Award

The ACM SIGMOD Test of Time Award recognizes the best paper from the SIGMOD proceedings 10 years prior (i.e., for 1998 the 1988 proceedings will be consulted), based on the criterion of identifying the paper that has had the most impact (research, products, methodology) over the intervening decade. This paper is chosen by the SIGMOD Awards Committee.

Recipients of the award are the following:

2017 Fault-tolerance in the Borealis distributed stream processing system. Magdalena Balazinska, Hari Balakrishnan, Samuel Madden, Michael Stonebraker [award abstract]
2016 Provenance Management in Curated Databases. Peter Buneman, Adriane Chapman, James Cheney [award abstract]
2015 Robust and Fast Similarity Search for Moving Object Trajectories. Lei Chen, M. Tamer Özsu, Vincent Oria [award abstract]
2014 Order-Preserving Encryption for Numeric Data. Rakesh Agrawal, Jerry Kiernan, Ramakrishnan Srikant, Yirong Xu [award abstract]
2013 The Design of an Acquisitional Query Processor for Sensor Networks. Samuel Madden, Michael J. Franklin, Joseph M. Hellerstein, Wei Hong [award abstract]
2012 Executing SQL over Encrypted Data in the Database-Service-Provider Model. Hakan Hacigumus, Bala Iyer, Chen Li, Sharad Mehrotra [award abstract]
2011 Optimizing Queries Using Materialized Views: A Practical, Scalable Solution. Jonathan Goldstein and Per-Åke Larson [award abstract]
2010 NiagaraCQ: A Scalable Continuous Query System for Internet Databases. Jianjun Chen, David J. DeWitt, Feng Tian, and Yuan Wang [award abstract]
2009 Approximate Computation of Multidimensional Aggregates of Sparse Data Using Wavelets. Jeffrey Scott Vitter and Min Wang [award abstract]
2008 Integration of Heterogeneous Databases without Common Domains Using Queries Based on Textual Similarity. William W. Cohen [award abstract]
2007 Online Aggregation. Joseph M. Hellerstein, Peter J. Haas, and Helen J. Wang [award abstract]
2006 BIRCH: An Efficient Data Clustering Method for Very Large Databases. Tian Zhang, Raghu Ramakrishnan, and Miron Livny [award abstract]
Implementing Data Cubes Efficiently. Venky Harinarayan, Anand Rajaraman, and Jeffrey D. Ullman [award abstract]
2005 View Maintenance in a Warehousing Environment. Yue Zhuge, Hector Garcia-Molina, Jennifer Widom, Joachim Hammer
2004 From Structured Documents to Novel Query Facilities. Vassilis Christophides, Serge Abiteboul, Sophie Cluet, and Michel Scholl [award abstract]
Shoring Up Persistent Applications. Michael J. Carey, David J. DeWitt, Michael J. Franklin, Nancy E. Hall, Mark L. McAuliffe, Jeffrey F. Naughton, Daniel T. Schuh, Marvin H. Solomon, C. K. Tan, Odysseas G. Tsatalos, Seth J. White, and Michael J. Zwilling [award abstract]
2003 Mining Association Rules Between Sets of Items in Large Databases. Rakesh Agrawal, Tomasz Imielinski, and Arun Swami [award abstract]
2002 Extensible/Rule Based Query Rewrite Optimization in Starburst. H. Pirahesh, J. M. Hellerstein, and W. Hasan
Querying Object-Oriented Databases. M. Kifer, W. Kim, and Y. Sagiv
2000 Encapsulation of Parallelism in the Volcano Query Processing System. Goetz Graefe
Set-Oriented Production Rules in Relational Database Systems. Jennifer Widom and Shel Finkelstein
1999 F-Logic: A Higher-Order Language for Reasoning About Objects, Inheritance, and Scheme. Michael Kifer and Georg Lausen
A Case for Redundant Arrays of Inexpensive Disks (RAID). David A. Patterson, Garth A. Gibson, and Randy H. Katz

SIGMOD Jim Gray Doctoral Dissertation Award

The annual ACM SIGMOD Doctoral Dissertation Award, inaugurated in 2006, recognizes excellent research by doctoral candidates in the database field. In 2008, SIGMOD, with the unanimous approval of ACM Council, decided to rename the award to honor Dr. Jim Gray.

2017 Winners: Peter Bailis (advisors: Joseph Hellerstein, Ion Stoica, and Ali Ghodsi), University of California, Berkeley
Honorable Mention: Immanuel Trummer  (advisor: Christoph Koch) École Polytechnique Fédérale de Lausanne
[award citation]
2016 Winners: Paris Koutris (advisor: Dan Suciu), University of Washington
Honorable Mentions: Pinar Tozun  (advisor: Anastasia Ailamaki) École Polytechnique Fédérale de Lausanne and Alvin Cheung (advisors: Sam Madden and Armando Solar-Lezama) MIT
[award citation]
2015 Winners: Alexander Thomson (advisor: Daniel Abadi), Yale University
Honorable Mentions: Marina Drosou  (advisor: Evaggelia Pitoura), University of Ioannina and Karthik Ramachandra (advisor: S. Sudarshan), IIT Bombay
[award citation]
2014 Winners: Aditya Parameswaran (advisor: Hector Garcia-Molina), Stanford University and Andy Pavlo (advisors: Stan Zdonik and Michael Stonebraker), Brown University
[award citation]
2013 Winner: Sudipto Das (advisors: Divy Agrawal and Amr El Abbadi), University of California – Santa Barbara
Honorable Mentions: Herodotos Herodotou (advisor: Shivnath Babu), Duke University and Wenchao Zhou (advisor: Boon Thau Loo), University of Pennsylvania
[award citation]
2012 Winner: Ryan Johnson (advisor: Anastasia Ailamaki), Carnegie Mellon University
Honorable Mention: Bogdan Alexe (advisor: Wang-Chiew Tan), University of California – Santa Cruz
[award citation]
2011 Winner: Stratos Idreos, Centrum Wiskunde and Informatica
Honorable Mentions: Todd Green, University of Pennsylvania; Karl Schnaitter, University of California – Santa Cruz
2010 Winner: Christopher Re (advisor: Dan Suciu), University of Washington
Honorable Mentions: Soumyadeb Mitra (advisor: Marianne Winslett), University of Illinois at Urbana-Champaign; Fabian Suchanek (advisor: Gerhard Weikum), Max Planck Institute for Informatics
[award citation]
2009 Winner: Daniel Abadi (advisor: Samuel Madden), MIT
Honorable Mentions: Bee-Chung Chen (advisor: Raghu Ramakrishnan), University
of Wisconsin at Madison; Ashwin Machanavajjhala (advisor: Johannes
Gehrke), Cornell University
[award citation]
2008 Winner: Ariel Fuxman (advisor: Renee J. Miller), University of Toronto
Honorable Mentions: Cong Yu (advisor: H. V. Jagadish), University of Michigan; Nilesh Dalvi (advisor: Dan Suciu), University of Washington
2007 Winner: Boon Thau Loo (advisor: Joseph M. Hellerstein and Ion Stoica), University of California at Berkeley
Honorable Mentions: Xifeng Yan (advisor: Jiawei Han), University of Illinois at Urbana-Champaign; Martin Theobald (advisor: Gerhard Weikum), Saarland University
2006 Winner: Gerome Miklau (advisor: Dan Suciu), University of Washington
Runners-up: Marcelo Arenas (advisor: Leonid Libkin), University of Toronto; Yanlei Diao (advisor: Michael Franklin), University of California at Berkeley

SIGMOD Undergraduate Award

The ACM Special Interest Group on Management of Data (SIGMOD) wants undergraduate students who have an interest in database systems to experience the cutting edge research presented at the ACM SIGMOD/PODS Joint Conferencess. In order to help those undergraduate students attend the conference, hence encouraging them to pursue a career related to database research, the ACM SIGMOD Undergraduate Scholarship Program was introduced by SIGMOD in 2000.

2015
Oreoluwa Babarinsa (Harvard University, USA)
Advisor: Stratos Idreos
JAFAR : Near-Data Processing for Databases

Trevor Clinkenbeard (University of Waterloo, Canada)
Advisor: Anisoara Nica
Job Scheduling with Minimizing Data Communication Costs

Styliani Pantela (Harvard University, USA)
Advisor: Stratos Idreos
One Loop Does Not Fit All

Adam Perelman (Stanford University, USA)
Advisor: Christopher Ré
Dunce Cap: Compiling Worst-Case Optimal Query Plans and Beyond (co-winner of best poster)

Susan Tu (Stanford University, USA)
Advisor: Christopher Ré
Dunce Cap: Query Plans Using Generalized Hypertree Decompositions (co-winner of best poster)

Mansheng Yang (National University of Singapore,Singapore)
Advisor: Richard Ma
Smooth Task Migration in Apache

2014
Himel Dev (Bangladesh University of Engineering and Technology)
A User Interaction Based Community Detection Algorithm for Online Social Networks

Himel Dev (Bangladesh University of Engineering and Technology)
Privacy Preserving Social Graphs for High Precision Community Detection

Kevin Fernandes (University of Massachusetts Amherst, USA)
PackageBuilder: Querying for packages of tuples

Curtis Kroetsch (University of Waterloo, Canada)
Multi-dimensional Data Statistics for Columnar In-Memory Databases

Mashaal Musleh (Umm Al-Qura University, KSA)
Spatio-temporal Visual Analysis for Event-Specific Tweets

Wenbo Tao (Tsinghua University, China)
Efficient Top-K SimRank-based Similarity Join

Min Xie (Advisors Cheng Long, Raymond Chi-Wing Wong)
EDS: A Segment-based Distance Measure for Sub-trajectory Similarity Search (winner of best poster)

2013
Wladston Viana and Mirela Moro (Universidade Federal de Minas Gerais)
FriendRouter – Real time Path Finder in Social Networks

Robert Christensen and Feifei Li (University of Utah)
Adaptive Log Compression for Massive Log Data (winner of best poster)

Luka Maas, Thomas Kissinger, Dirk Habich, and Wolfgang Lehner (Technische Universität Dresden)
BUZZARD: A NUMA-Aware In-Memory Indexing System

Tian Tan, Marianne Winslett, Richard Ma, Yin Yang, Yong Yu, and Zhenjie Zhang, (Shanghai Jiao Tong University, University of Illinois Urbana Champaign, National University of Singapore, ADSC Singapore)
Resa: Realtime Elastic Streaming Analytics in the Cloud

Ruizhe Huang and Lei Zou (Peking University)
Natural Language Question Answering over RDF Data

2012
Gi Hwan Oh, Sungkyunkwan University, Korea
Reducing Cache Misses in Hash Join Probing Phase By Pre-Sorting Strategy

Razvan Ranca, University of California, Santa Barbara, USA
SigSpot: Mining Significant Anomalous Regions from Time-Evolving Network

Kristina Lam Thai, University of California, San Diego, USA
Declarative Web Application Development: Encapsulating Dynamic JavaScript Widgets

Frank Rosner, Martin-Luther-University Halle-Wittenberg, Germany
Fast Sampling Word Correlations of High Dimensional Text Data

Tyler Sliwkanich, University of Alberta, Canada
Towards Scalable Summarization and Visualization of Large Text Corpora (winner of best poster)

Shangfu Peng, Shanghai Jiao Tong University, China
DP-tree: Indexing Multi-Dimensional Data under Differential Privacy

Eduardo M. Barbosa, UFMG, Brazil
VRRC: Web Based Tool for Visualization and Recommendation on Co-Authorship Network

2010
Yael Amsterdamer, Tel Aviv University, Israel
Top-k Algorithms for Interactive Processes

Ian Charlesworth, University of Waterloo
, Canada
Analyzing Plan Spaces of Query Optimizers

Theodore Georgiou, National and Kapodistrian University of Athens, Greece
Extracting Topics of Debate between Users on Web Discussion Boards (winner of best poster) 

Zhenqiang Gong, University of Science and Technology of China (USTC)
Parallel Algorithms for Top-k Query Processing

Manos Karvounis, National and Kapodistrian University of Athens, Greece
Utilizing the Quoting System of Online Web Forums to Estimate User Agreement (winner of best poster)

Bharath Vissapragada, International Institute of Information Technology, Hyderabad (IIIT-H), India
Query Optimization on Cloud

2009
Daniel Scott Brotherston, University of Waterloo, Canada
Comparing and visualizing query optimizer search spaces

David M. Lewis, University of Maryland, Baltimore County, USA
An evaluative comparison of similarity coefficients for binary valued data

Sang-Phil Lim, Sung Kyun Kwan University, Korea
FASTer FTL for enterprise-class flash memory SSDs

Manasi Vartak, Worcester Polytechnic Institute, USA
Recommendation based query relaxation via mapping functions and space partitioning

Shashank Yaduvanshi, Indian Institute of Technology, Bombay, India
An architecture for regulatory compliant database management

2008
Sriram Vanama, Indian Institute of Technology, Madras, India
Sanghoon Cha, Brown University, USA
Alban Galland, University Telecom Paris Tech, France
Alexander G. Connor, University of Pittsburgh, USA
Hongyu Gao, Peking University, China
Yoshishige Tsuji, Keio University, Japan
Eli Cortez C. Vilarinho, Universidade Federal Do Amazonas, Brazil
Yang Ye, Tsinghua University, China
2007
Rui Fang, Hong Kong University of Science & Technology, China
Marcin Kwietniewski, Warsaw University of Technology, Poland, and York University, Canada
Yin Yee (Samantha) Leung, University of British Columbia, Canada
Rui Li, Shanghai Jiao Tong University, China
Yinan Li, Peking University, China
Zhongyuan Wang, Renmin University, China
Zhijun Yin, Fudan University, China
2006
Ioannis Antonellis, University of Patras, Greece
Mark Daly, Princeton Univ., USA
Zhiwei (Tony) Qin, University of British Columbia, Canada
Morgan Jaclyn Gregory, University of British Columbia, Canada
Joshua Schiffman, Penn State University, USA
2005
Arpit Jain, IIT Bombay, India
Jaekyun Seok, Korea Advanced Institute of Science and Technology, Korea
Naju Mancheril, Carnegie Mellon University, USA
Linus Liang, University of California, Berkeley, USA
Derek Dalrymple, University of Maryland, Baltimore County, USA
2004
Andrei Arion, France
Anoop Shankar, Canada
Gaurav Pandey, India
Shashank Pandit, India
Shaveen Garg, India
2003
Eric Chu, Univ. of Washington, USA
Anurag Maskey, Brandeis Univ., USA
Nicoleta Preda, Politechnic Univ. of Bucharest, Romania
Ping Wu, Fudan Univ., China
2002
Daniel J. Abadi
Wu Cen
Justin Rosenstein
Yaling Pei
2001
Jason Chionh
Nilesh Dalvi
Antonio Gomez
Markus Wawryniuk
Sumit Kumar Sanghai
2000
Keiji Oenoki
Matjaz Planinsic
Gaurav Bhalota
Ryan Huebsch
Antonio Dona

SIGMOD Best Demonstration Award

SIGMOD recognizes the best demonstration at the annual conference. There is one award for each demo session.

2015
John Morcos; Ziawasch Abedjan; Ihab Francis Ilyas; Mourad Ouzzani; Paolo Papotti; Michael Stonebraker
DataXFormer: An Interactive Data Transformation ToolDaniel Scheibli; Christian Dinse; Alexander BoehmQE3D: Interactive Visualization and Exploration of Complex, Distributed Query Plans

Yonathan Perez; Rok Sosic; Arijit Banerjee; Rohan Puttagunta; Martin Raison; Pararth Shah; Jure Leskovec: Ringo: Interactive Graph Analytics on Big-Memory Machines

Robert Christensen; Feifei Li; Lu Wang; Ke Yi; Jun Tang; Natalee Villa: STORM: Spatio-Temporal Online Reasoning and Management of Large Spatio-Temporal Data

2014
Alkis Simitsis, HP Labs; Kevin Wilkinson, HP Labs; Jason Blais, Vertica – HP Software; Joe Walsh, Vertica – HP Software
VQA: Vertica Query Analyzer

Carsten Binnig, Baden-Wuerttemberg Cooperative State University; Abdallah Salama, Baden-Wuerttemberg Cooperative State University; Erfan Zamanian, Baden-Wuerttemberg Cooperative State University
DoomDB – Kill the Query

Kai Zeng, University of California, Los Angeles; Shi Gao, University of California, Los Angeles; Jiaqi Gu, University of California, Los Angeles; Barzan Mozafari, University of Michigan; Carlo Zaniolo, University of California, Los Angeles
ABS: a System for Scalable Approximate Queries with Accuracy Guarantees

SIGMOD Most Reproducible Paper Award

SIGMOD recognizes the best papers in terms of reproducibility. The three most reproducible papers are picked every year. The criteria are as follows: (i) coverage (ideal: all results can be verified), (ii) ease of reproducibility (ideal: just works), (iii) flexibility (ideal: can change workloads, queries, data and get similar behavior with published results), and (iv) portability (ideal: linux, mac, windows).

2017
[award citation]
Ning Yan, Sona Hasani, Abolfazl Asudeh, Chengkai Li
Generating Preview Tables for Entity Graphs

Shrainik Jain, Dominik Moritz, Daniel Halperin, Bill Howe, Ed Lazowska
SQLShare: Results from a Multi-Year SQL-as-a-Service Experiment

Fernando Chirigati, Harish Doraiswamy, Theodoros Damoulas, Juliana Freire
Data Polygamy: The Many-Many Relationships among Urban Spatio-Temporal Data Sets

Manos Athanassoulis, Zheng Yan, Stratos Idreos
UpBit: Scalable In-Memory Updatable Bitmap Indexing

SIGMOD Special Service Award

In recognition of volunteer efforts to the database field. Recipients of the award are the following:

1997
Michael_Ley
Michael Ley