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Editorial

SQL’s Three-Valued Logic and Certain Answers

The goal of the article is to bridge the difference between theoretical and practical approaches to answering queries over databases with nulls.... (more)

Materialization Optimizations for Feature Selection Workloads

There is an arms race in the data management industry to support statistical analytics. Feature selection, the process of selecting a feature set that... (more)

ENFrame

This article introduces ENFrame, a framework for processing probabilistic data. Using ENFrame, users can write programs in a fragment of Python with constructs such as loops, list comprehension, aggregate operations on lists, and calls to external database engines. Programs are then interpreted probabilistically by ENFrame. We exemplify ENFrame on... (more)

Dichotomies for Queries with Negation in Probabilistic Databases

This article charts the tractability frontier of two classes of relational algebra queries in tuple-independent probabilistic databases. The first... (more)

BEVA

Query autocompletion has become a standard feature in many search applications, especially for search engines. A recent trend is to support the error-tolerant autocompletion, which increases the usability significantly by matching prefixes of database strings and allowing a small number of errors. In this article, we systematically study the query... (more)

Declarative Cleaning of Inconsistencies in Information Extraction

The population of a predefined relational schema from textual content, commonly known as Information Extraction (IE), is a pervasive task in... (more)

Inferring Social Strength from Spatiotemporal Data

The advent of geolocation technologies has generated unprecedented rich datasets of people’s location information at a very high fidelity. These... (more)

NEWS

Changes to the TODS Editorial Board

As of January 1, 2016, five Associate Editors, Wenfei Fan, Chris Jermaine, Tova Milo, Lucian Popa, and Divesh Srivastava, ended their terms, having served on the editorial board for six, or between six and seven, years. In addition, they will stay on until they complete their current loads. We are fortunate that they have donated their time and world-class expertise during these years. Also five new Associate Editors have joined the editorial board: Marcelo Arenas, Gao Cong, Torsten Grust, Peter Haas, and Wim Martens.

Please read more here.

New options for ACM authors to manage rights and permissions for their work

ACM introduces a new publishing license agreement, an updated copyright transfer agreement, and a new author-pays option which allows for perpetual open access through the ACM Digital Library. For more information, visit the ACM Author Rights webpage.

 

New TODS EiC Appointed 

The ACM Publications Board has appointed Christian S. Jensen as the seventh Editor-in-Chief of ACM TODS, as of this date. Christian replaces Z. Meral Özsoyoglu, who provided six years and eight months of excellent stewardship as TODS Editor-in-Chief. In addition to his many other accomplishments, Christian is an experienced TODS editor having previously served for six years as an Associate Editor (8/1/2001 to 7/31/2007).

Forthcoming Articles
Private and Scalable Execution of SQL Aggregates on a Secure Decentralized Architecture

Current applications, from complex sensor systems (e.g. quantified self) to online e-markets acquire vast quantities of personal information which usually end-up on central servers where they are exposed to prying eyes. Conversely, decentralized architectures helping individuals keep full control of their data, complexify global treatments and queries, impeding the development of innovative services. This paper precisely aims at reconciling individual's privacy on one side and global benefits for the community and business perspectives on the other side. It promotes the idea of pushing the security to secure hardware devices controlling the data at the place of their acquisition. Thanks to these tangible physical elements of trust, secure distributed querying protocols can reestablish the capacity to perform global computations, such as SQL aggregates, without revealing any sensitive information to central servers. This paper studies the subset of SQL queries without external joins and shows how to secure their execution in the presence of honest-but-curious attackers. It also discusses how the resulting querying protocols can be integrated in a concrete decentralized architecture. Cost models and experiments on SQL/AA, our distributed prototype running on real tamper-resistant hardware, demonstrate that this approach can scale to nationwide applications.

Bounded Repairability for Regular Tree Languages

We study the problem of bounded reparability of a given restriction tree language R into a target tree language T. More precisely, we say that R is bounded repairable w.r.t. T if there exists a bound on the number of standard tree editing operations necessary to apply to any tree in R in order to obtain a tree in T. We consider a number of possible specifications for the tree langauges: bottom-up tree automata (on curry encoding of unranked tree) that capture the class of XML Schemas and DTDs. We also consider a special case when the restriction language R is universal, i.e., contains all trees over a given alphabet. We give an effective characterization of bounded repairability between pairs of tree languages represented with automata. This characterization introduces two novel tools, synopsis trees and a coverage relation between them, allowing one to reason about tree languages that undergo a bounded number of editing operation. We then employ this characterization to provide upper bounds to the complexity of deciding bounded reparability and we show that these bounds are tight. In particular, when the input tree language are specified with arbitrary bottom-up automata, the problem is CONEXPTIME-complete. The problem remains CONEXPTIME-complete even if we use deterministic non-recursive DTDs to specify the input languages. The complexity of the problem can be reduced if we assume that the alphabet, the set of node lables, is fixed: the problem becomes PSPACE-complete for non-recursive DTDs and CONP-complete for deterministic non-recursive DTDs. Finally, when the restriction tree language R is universal, we show that the bounded reparability problem becomes EXPTIME-complete if the target language is specified by an arbitrary bottom-up tree automaton and becomes tractable (PTIME-complete, in fact) when a deterministic bottom-up automaton is used.

A Declarative Framework for Linking Entities

We introduce and develop a declarative framework for entity linking and, in particular, for entity resolution. As in some earlier approaches, our framework is based on a systematic use of constraints. However, the constraints we adopt are link-to-source constraints, unlike in earlier approaches where source-to-link constraints were used to dictate how to generate links. Our approach makes it possible to focus entirely on the intended properties of the outcome of entity linking, thus separating the constraints from any procedure of how to achieve that outcome. The core language consists of link-to-source constraints that specify the desired properties of a link relation in terms of source relations and built-in predicates such as similarity measures. A key feature of the link-to-source constraints is that they employ disjunction, which enables the declarative listing of all the reasons as to why two entities should be linked. We also consider extensions of the core language that capture collective entity resolution, by allowing inter-dependencies among the link relations. We identify a class of "good'' solutions for entity linking specifications, which we call maximum-value solutions and which capture the strength of a link by counting the reasons that justify it. We study natural algorithmic problems associated with these solutions, including the problem of enumerating the "good'' solutions, and the problem of finding the certain links, which are the links that appear in every "good'' solution. We show that these problems are tractable for the core language, but may become intractable once we allow inter-dependencies among the link relations. We also make some surprising connections between our declarative framework, which is deterministic, and probabilistic approaches such as ones based on Markov Logic Networks.

Monadic datalog and regular tree pattern queries

Containment of monadic datalog programs over trees is decidable. The situation is more complex when tree nodes carry labels from an infinite alphabet that can be tested for equality. Then, it matters whether descendant relation is allowed or not: descendant relation can be eliminated easily from monadic programs only when label equalities are not used. With descendant, even containment of linear monadic programs in unions of conjunctive queries is undecidable and positive results are known only for bounded-depth trees. We show that without descendant containment of connected monadic programs is decidable over ranked trees, but over unranked trees it is so only for linear programs. With descendant it becomes decidable over unranked trees under restriction to downward programs: each rule only moves down from the node in the head. This restriction is motivated by regular tree pattern queries, a recent formalism in the area of ActiveXML, which we show to be equivalent to linear downward programs.

The Exact Complexity of the First-Order Logic Definability Problem

We study the definability problem for first-order logic, denoted by FO-DEF. The input of FO-DEF is a relational database instance I and a relation R, and the question to answer is whether there exists a first-order query Q (or, equivalently, a relational algebra expression Q) such that Q evaluated on I gives R as an answer. Although the study of FO-DEF dates back to 1978, when the decidability of this problem was shown, the exact complexity of FO-DEF remains as a fundamental open problem. In this paper, we provide a polynomial-time algorithm for solving FO-DEF which uses calls to a graph-isomorphism subroutine (or oracle). As a consequence, the first-order definability problem is found to be complete for the class GI of all problems which are polynomial-time Turing reducible to the graph isomorphism problem, thus closing the open question about the exact complexity of this problem. The technique used is also applied to a generalised version of the problem which accepts a finite set of relation pairs, and whose exact complexity was also open; this version is also found to be GI-complete.

The Complexity of Learning Tree Patterns from Example Graphs

This article investigates the problem of learning tree patterns that return nodes with a given set of labels, from example graphs provided by the user. Example graphs are annotated by the user as being either positive or negative. The goal is then to determine whether there exists a tree pattern returning tuples of nodes with the given labels in each of the positive examples, but in none of the negative examples, and, furthermore, to find one such pattern if it exists. These are called the satisfiability and learning problems, respectively. This article thoroughly investigates the satisfiability and learning problems in a variety of settings. In particular, we consider example sets that (1) may contain only positive examples, or both positive and negative examples, (2) may contain directed or undirected graphs, and (3) may have multiple occurrences of labels or be uniquely labeled (to some degree). In addition, we consider tree patterns of different types that can allow, or prohibit, wildcard labeled nodes and descendant edges. We also consider two different semantics for mapping tree patterns to graphs. The complexity of satisfiability is determined for the different combinations of settings. For cases in which satisfiability is polynomial, it is also shown that learning is polynomial. (This is non-trivial as satisfying patterns may be exponential in size.) Finally, the minimal learning problem, i.e., that of finding a minimal-sized satisfying pattern, is studied for cases in which satisfiability is polynomial.

Sloth: Being Lazy is a Virtue (When Issuing Database Queries)

Many web applications store persistent data in databases. During execution, such applications spend a significant amount of time communicating with the database for retrieval and storing of persistent data over the network. These network round trips represent a significant fraction of the overall execution time for many applications (especially those that issue a lot of database queries), and as a result increase their latency. While there has been prior work that aims to eliminate round trips by batching queries, they are limited by 1) a requirement that developers manually identify batching opportunities, or 2) the fact that they employ static program analysis techniques that cannot exploit many opportunities for batching, as many of such opportunities require knowing precise information about state of the running program. In this article, we present SLOTH, a new system that extends traditional lazy evaluation to expose query batching opportunities during application execution, even across loops, branches, and method boundaries. Many such opportunities often require expensive and sophisticated static analysis to recognize from the application source code. Rather than doing so, SLOTH instead makes use of dynamic analysis to capture information about the program state, and based on that information decide how to batch queries and when to issue them to the database. We formalize extended lazy evaluation and prove that it preserves program semantics when executed under standard semantics. Furthermore, we describe our implementation of SLOTH, and our experience in evaluating SLOTH using over 100 benchmarks from two large-scale open-source applications, where SLOTH achieved up to a 3x reduction in page load time by delaying computation using extended lazy evaluation.

B-Trees and Cache-Oblivious B-Trees with Different-Sized Atomic Keys

Most B-tree papers assume that all $N$ keys have the same size $K$, that $f=B/K$ keys fit in a disk block, and therefore that the search cost is $O(\log_{f+1} N)$ block transfers. When keys have variable size, B-tree operations have no nontrivial performance guarantees, however. This paper provides B-tree-like performance guarantees on dictionaries that contain keys of different sizes in a model in which keys must be stored and compared as opaque objects. The resulting atomic-key dictionaries exhibit performance bounds in terms of the average key size and match the bounds when all keys are the same size. Atomic key dictionaries can be built with minimal modification to the B-tree structure, simply by choosing the pivot keys properly. This paper describes both static and dynamic atomic-key dictionaries. In the static case, if there are $N$ keys with average size $K$, the search cost is $O(\lceil K/B \rceil \log_{1+\lceil B/K\rceil}N)$ expected transfers. It is not possible to transform these expected bounds into worst-case bounds. The cost to build the tree is $O(NK)$ operations and $O(NK/B)$ transfers if all keys are presented in sorted order. If not, the cost is the sorting cost. For the dynamic dictionaries, the amortized cost to insert a key $\kappa$ of arbitrary length at an arbitrary rank is dominated by the cost to search for $\kappa$. Specifically the amortized cost to insert a key $\kappa$ of arbitrary length and random rank is $O(\lceil K/B \rceil \log_{1+ \lceil B/K\rceil}N + \left| \kappa \right|/B)$ transfers. A dynamic-programming algorithm is shown for constructing an search tree with minimal expected cost. This paper also gives a cache-oblivious static atomic-key B-tree, which achieves the same asymptotic performance as the static B-tree dictionary, mentioned above. A cache-oblivious data structure or algorithm is not parameterized by the block size $B$ or memory size $M$ in the memory hierarchy; rather, it is universal, working simultaneously for all possible values of $B$ or $M$. On a machine with block size $B$, if there are $N$ keys with average size $K$, search operations costs $O(\lceil K/B \rceil \log_{1+\lceil B/K\rceil}N)$ block transfers in expectation. This cache-oblivious layout can be built in $O(N \log NK)$ processor operations.

Scalable Atomic Visibility with RAMP Transactions

Databases can provide scalability by partitioning data across several servers. However, multi-partition, multi-operation transactional access is often expensive, employing coordination-intensive locking, validation, or scheduling mechanisms. Accordingly, many real-world systems avoid mechanisms that provide useful semantics for multi-partition operations. This leads to incorrect behavior for a large class of applications including secondary indexing, foreign key enforcement, and materialized view maintenance. In this work, we identify a new isolation modelRead Atomic (RA) isolationthat matches the requirements of these use cases by ensuring atomic visibility: either all or none of each transactions updates are observed by other transactions. We present algorithms for Read Atomic Multi-Partition (RAMP) transactions that enforce atomic visibility while offering excellent scalability, guaranteed commit despite partial failures (via coordination- free execution), and minimized communication between servers (via partition independence). These RAMP transactions correctly mediate atomic visibility of updates and provide readers with snapshot access to database state by using limited multi-versioning and by allowing clients to independently resolve non- atomic reads. We demonstrate that, in contrast with existing algorithms, RAMP transactions incur limited overheadeven under high contentionand scale linearly to 100 servers.

Bibliometrics

Publication Years 1976-2016
Publication Count 912
Citation Count 29606
Available for Download 912
Downloads (6 weeks) 4355
Downloads (12 Months) 34781
Downloads (cumulative) 769835
Average downloads per article 844
Average citations per article 32
First Name Last Name Award
Divyakant Agrawal ACM Distinguished Member (2010)
ACM Senior Member (2008)
Eric Allman ACM Distinguished Member (2009)
Algirdas Avizienis ACM-IEEE CS Eckert-Mauchly Award (2012)
Hari Balakrishnan ACM Doctoral Dissertation Award (1998)
Michael W. Blasgen ACM Programming Systems and Languages Paper Award (1982)
Roderic G. Cattell ACM Doctoral Dissertation Award (1978)
Donald Chamberlin ACM Software System Award (1988)
Edgar F Codd A. M. Turing Award (1981)
Graham R. Cormode ACM Distinguished Member (2013)
William J Dally ACM-IEEE CS Eckert-Mauchly Award (2010)
David DeWitt ACM Software System Award (2008)
Peter J Denning Outstanding Contribution to ACM Award (1998)
ACM Karl V. Karlstrom Outstanding Educator Award (1996)
ACM Distinguished Service Award (1989)
ACM Programming Systems and Languages Paper Award (1971)
Carla S. Ellis ACM Distinguished Member (2009)
Ahmed Elmagarmid ACM Distinguished Member (2009)
Martin Erwig ACM Senior Member (2008)
Jane Fedorowicz ACM Senior Member (2014)
Alan D Fekete ACM Distinguished Member (2006)
Peter A. Franaszek ACM Paris Kanellakis Theory and Practice Award (2002)
Minos Garofalakis ACM Distinguished Member (2011)
ACM Senior Member (2009)
Shahram Ghandeharizadeh ACM Software System Award (2008)
Calvin C. Gotlieb Outstanding Contribution to ACM Award (2011)
ACM Presidential Award (2002)
Goetz Graefe ACM Software System Award (2008)
Jim Gray A. M. Turing Award (1998)
ACM Software System Award (1988)
ACM Programming Systems and Languages Paper Award (1982)
Robert L. Hartmann ACM Senior Member (2009)
Gernot Heiser ACM Senior Member (2009)
Gerald Held ACM Software System Award (1988)
Piotr Indyk ACM Paris Kanellakis Theory and Practice Award (2012)
Richard Karp A. M. Turing Award (1985)
Randy H. Katz ACM Karl V. Karlstrom Outstanding Educator Award (1999)
Zvi Kedem Outstanding Contribution to ACM Award (2012)
Won Kim ACM Distinguished Service Award (2001)
David J Kuck ACM-IEEE CS Ken Kennedy Award (2010)
ACM-IEEE CS Eckert-Mauchly Award (1993)
Leslie Lamport A. M. Turing Award (2013)
Bruce Lindsay ACM Programming Systems and Languages Paper Award (1982)
Tok Wang Ling ACM Distinguished Member (2009)
ACM Senior Member (2009)
Jorge Lobo ACM Distinguished Member (2009)
Raymond A Lorie ACM Software System Award (1988)
ACM Programming Systems and Languages Paper Award (1982)
Nancy Lynch ACM-W Athena Lecturer Award (2012)
Paul R McJones ACM Programming Systems and Languages Paper Award (1982)
Jack Minker ACM AAAI Allen Newell Award (2005)
Outstanding Contribution to ACM Award (1985)
Mohamed F Mokbel ACM Senior Member (2013)
Mario A Nascimento ACM Senior Member (2007)
Jeffrey F Naughton ACM Software System Award (2008)
Jian Pei ACM Senior Member (2007)
Thomas G Price ACM Programming Systems and Languages Paper Award (1982)
Vijay V Raghavan ACM Distinguished Member (2012)
Domenico Sacca ACM Senior Member (2007)
Hanan Samet ACM Paris Kanellakis Theory and Practice Award (2011)
Donovan A Schneider ACM Software System Award (2008)
Timoleon Sellis ACM Senior Member (2008)
Abraham Silberschatz ACM Karl V. Karlstrom Outstanding Educator Award (1998)
Donald R Slutz ACM Programming Systems and Languages Paper Award (1971)
Richard T Snodgrass Outstanding Contribution to ACM Award (2004)
Richard E Stearns A. M. Turing Award (1993)
Michael Stonebraker A. M. Turing Award (2014)
ACM Software System Award (1988)
Robert E Tarjan ACM Paris Kanellakis Theory and Practice Award (1999)
A. M. Turing Award (1986)
Robert W Taylor ACM Software System Award (1984)
Srikanta N Tirthapura ACM Senior Member (2009)
Irv Traiger ACM Software System Award (1988)
ACM Programming Systems and Languages Paper Award (1982)
ACM Programming Systems and Languages Paper Award (1971)
Jeffrey D Ullman ACM Karl V. Karlstrom Outstanding Educator Award (1997)
Moshe Y Vardi Outstanding Contribution to ACM Award (2009)
ACM Presidential Award (2008)
ACM Paris Kanellakis Theory and Practice Award (2005)
Jeffrey S Vetter ACM Distinguished Member (2012)
ACM Gordon Bell Prize
Performance (2010)
Mark Allen Weiss ACM Distinguished Member (2011)
Jennifer Widom ACM-W Athena Lecturer Award (2015)
Eugene Wong ACM Software System Award (1988)
Kesheng Wu ACM Distinguished Member (2010)
ACM Senior Member (2007)
Kesheng Wu ACM Distinguished Member (2010)
ACM Senior Member (2007)

First Name Last Name Paper Counts
Hector Garcia-Molina 13
Philip Bernstein 13
Ronald Fagin 12
Yufei Tao 12
Jeffrey Ullman 10
Nathan Goodman 9
Richard Snodgrass 9
Eugene Wong 8
Dan Suciu 8
Minos Garofalakis 8
Hanan Samet 8
Dimitris Papadias 8
Sushil Jajodia 8
Phokion Kolaitis 8
Victor Vianu 8
Michael Stonebraker 7
Clement Yu 7
Stefano Ceri 7
Don Batory 7
Christian Jensen 7
Meral Özsoyoğlu 7
Raghu Ramakrishnan 7
Wangchiew Tan 7
Serge Abiteboul 7
Hosagrahar Jagadish 7
Wenfei Fan 6
David DeWitt 6
Surajit Chaudhuri 6
Leonid Libkin 6
Yannis Ioannidis 6
Won Kim 6
Yehoshua Sagiv 6
Marianne Winslett 6
Alberto Mendelzon 6
Carlo Zaniolo 6
Nick Koudas 6
VS Subrahmanian 6
Graham Cormode 6
Xuemin Lin 6
Sharad Mehrotra 5
Ouri Wolfson 5
Frank Neven 5
Rudolf Bayer 5
Alin Dobra 5
Luis Gravano 5
Susan Davidson 5
Veda Storey 5
Laks Lakshmanan 5
Divesh Srivastava 5
Jef Wijsen 5
Amr El Abbadi 5
Gültekin Özsoyoglu 5
Nikos Mamoulis 5
George Kollios 5
Per Larson 5
Stijn Vansummeren 5
Catriel Beeri 5
David Shipman 5
Floris Geerts 5
Michael Franklin 5
Kotagiri Ramamohanarao 5
Shibing Yao 5
Christopher Jermaine 5
Jennifer Widom 5
Michael Böhlen 5
Benny Kimelfeld 4
Henry Korth 4
Ke Yi 4
Philip Yu 4
Manlung Yiu 4
David Maier 4
Tiko Kameda 4
Lucian Popa 4
Yinong Chen 4
David Lomet 4
Stavros Christodoulakis 4
Arie Shoshani 4
Phillip Gibbons 4
Marcelo Arenas 4
Dimitrios Gunopulos 4
Florin Rusu 4
Ziyang Liu 4
Paolo Ciaccia 4
Xiaokui Xiao 4
Georg Gottlob 4
Dan Olteanu 4
Raymond Ng 4
Shamkant Navathe 4
Mario Schkolnick 4
Nick Roussopoulos 4
Peter Buneman 4
Dennis Shasha 4
Bengchin Ooi 4
Jan Chomicki 4
Stanley Su 4
Dorothy Denning 4
Kenneth Sevcik 4
Stefano Paraboschi 4
Michael Carey 4
Peter Lockemann 3
Pierangela Samarati 3
Marios Hadjieleftheriou 3
Dmitri Kalashnikov 3
Jorge Pérez 3
Esen Ozkarahan 3
Wim Martens 3
Mankeung Siu 3
Miron Livny 3
Paolo Tiberio 3
Neoklis Polyzotis 3
Marco Patella 3
Gustavo Alonso 3
Gautam Das 3
Oded Shmueli 3
Joseph Hellerstein 3
Christoph Koch 3
Martin Kersten 3
Walid Aref 3
Raymond Lorie 3
Yiping Ke 3
Arnon Rosenthal 3
Elke Rundensteiner 3
Edwin Jacox 3
Edward Sciore 3
Markus Schneider 3
Kianlee Tan 3
James Rothnie 3
Piero Fraternali 3
Krithi Ramamritham 3
Thomas Eiter 3
Sara Cohen 3
Anastasia Ailamaki 3
Gio Wiederhold 3
Cheng Sheng 3
Jan Paredaens 3
Bettina Kemme 3
Nicolas Bruno 3
Yannis Papakonstantinou 3
Kenneth Salem 3
Giuseppe Pelagatti 3
Richard Hull 3
Wei Wang 3
Toon Calders 3
Ben Shneiderman 3
Arie Segev 3
Divyakant Agrawal 3
Dennis Severance 3
Bradford Wade 3
Bernhard Seeger 3
Gerhard Weikum 3
William Kent 3
Salvatore March 3
Bruce Lindsay 3
Chen Li 3
Wilfred Ng 3
Jeffrey Vitter 3
Leonid Libkin 3
James Cheng 3
Douglas Comer 3
Rakesh Agrawal 3
Jim Gray 3
Cyrus Shahabi 3
Anthony Klug 3
Patrick Valduriez 3
Alfred Aho 3
Jeffreyxu Yu 3
Goetz Graefe 3
Sergey Melnik 3
Elena Baralis 3
Kevin Chang 3
David Stemple 3
Dennis McLeod 3
K Lam 3
Walter Burkhard 3
James Clifford 3
Wiebren De Jonge 3
Alan Fekete 3
Debabrata Dey 3
John Robinson 3
Michael Benedikt 3
Tova Milo 3
Eliezer Lozinskii 3
Panagiotis Ipeirotis 3
Vijay Raghavan 3
Panos Kalnis 3
Sebastian Link 3
Toshihide Ibaraki 3
Luc Segoufin 3
Guy Lohman 3
Thomas Schwentick 3
Wolfgang Effelsberg 2
Xifeng Yan 2
Dina Bitton 2
Marta Patiño-Martínez 2
Kyuseok Shim 2
Jianbin Qin 2
Pankaj Agarwal 2
Yin Yang 2
E Babb 2
Calvin Gotlieb 2
Chuan Xiao 2
Mohamed Mokbel 2
Gabriel Kuper 2
Roger King 2
Arash Termehchy 2
Vivek Narasayya 2
Philip Lehman 2
Morton Astrahan 2
Michael Hammer 2
Robert Goldstein 2
Peter Denning 2
Elisa Bertino 2
James Mehl 2
Raymond Wong 2
Chinwan Chung 2
Francesco Malvestuto 2
Diane Smith 2
Sakti Pramanik 2
Werner Nutt 2
Gao Cong 2
Theo Härder 2
Romulo Gonçalves 2
Qing Zhang 2
Ricardo Jiménez-Peris 2
Wei Wang 2
Wenchi Hou 2
Kesheng Wu 2
Alistair Moffat 2
Paolo Atzeni 2
Stephen Sherman 2
Ilaria Bartolini 2
Sergio Flesca 2
Andrew Whinston 2
Kenneth Ross 2
Angela Bonifati 2
Tom Ameloot 2
Balder Ten Cate 2
Qing Liu 2
Yanlei Diao 2
Anastasios Kementsietsidis 2
Subramanian Arumugam 2
Abhijit Pol 2
Allen Van Gelder 2
Robert Ross 2
Panagiotis Karras 2
George Loizou 2
Reind Van De Riet 2
Jens Teubner 2
Justin Zobel 2
Fei Xu 2
Amit Kumar 2
Michael Siegel 2
Rabia Nuray-Turan 2
Izchak Sharfman 2
Filippo Furfaro 2
Curtis Dyreson 2
Hamid Pirahesh 2
Letizia Tanca 2
Giovanni Sacco 2
Antonios Deligiannakis 2
Mingxi Wu 2
Feifei Li 2
Pierre Bourhis 2
Christos Polyzois 2
Peter Franaszek 2
Jan Schlorer 2
Yair Wand 2
David Embley 2
Sheldon Finkelstein 2
Geert Bex 2
Tolga Bozkaya 2
Gottfried Vossen 2
Jeffrey Naughton 2
Donghui Zhang 2
Panos Chrysanthis 2
Moshe Vardi 2
Tamer Özsu 2
Christos, Papadimitriou 2
Sudipto Guha 2
Anindya Datta 2
Alexander Thomasian 2
Lei Chen 2
Barbara Pernici 2
Witold Litwin 2
Jack Minker 2
Irving Traiger 2
Ralf Güting 2
Daniel Ries 2
Donald Chamberlin 2
Millist Vincent 2
Wenfei Fan 2
Jiaheng Lu 2
Shimin Chen 2
Ken Smith 2
Heikki Mannila 2
Eric Clemons 2
Reinhard Pichler 2
Marc Graham 2
Kyuyoung Whang 2
Samuel Madden 2
Randy Katz 2
Claudio Sartori 2
Rong Zhang 2
Qiong Luo 2
Abraham Silberschatz 2
Ling Liu 2
Christopher Reeve 2
Donald Kossmann 2
Richard Brice 2
S Muthukrishnan 2
Takwoon Yan 2
Jianhua Feng 2
Francis Chin 2
Victor Matos 2
Edward, Chan 2
Shivnath Babu 2
Guido Moerkotte 2
C Mohan 2
Michael Kifer 2
Baihua Zheng 2
Alan Smith 2
Barron Housel 2
Jan Van Den Bussche 2
Dirk Van Gucht 2
Ahmed Elmagarmid 2
Ihab Ilyas 2
Haran Boral 2
Jürg Nievergelt 2
Andrew McGregor 2
Ron Obermarck 2
Marco Casanova 2
Jiawei Han 2
Torsten Grust 2
Patricia Griffiths 2
Giorgio Ghelli 2
Maurice Herlihy 2
Kyriakos Mouratidis 2
Mauro Negri 2
Debra Vandermeer 2
Ting Yu 2
Christopher 2
Assaf Schuster 2
Davide Martinenghi 2
James Cheney 2
Guoliang Li 2
Claudio Bettini 2
Georgia Koutrika 2
John Smith 2
Weidong Chen 2
Louiqa Raschid 2
Peter Wood 2
Val Tannen 2
Junghoo Cho 2
Lee Hollaar 2
Dario Colazzo 2
John Kam 2
Todd Green 2
Vagelis Hristidis 2
Alan Nash 2
Balder Cate 2
Bingsheng He 2
Patrick O'Neil 2
Joseph Wald 2
Vassilis Athitsos 2
Chaitanya Mishra 2
Sanjeev Khanna 2
Williamfrank King 2
H Kung 2
Yannis Manolopoulos 2
Alexander Markowetz 2
Evaggelia Pitoura 2
Nikolaus Augsten 2
Yidong Yuan 2
Claudio GutiéRrez 2
Jian Pei 2
Nicolas Spyratos 2
Liyan Yuan 2
Sven Hartmann 2
Mark Levene 2
Gísli Hjaltason 2
Zhewei Wei 2
Gerome Miklau 2
Sonia Bergamaschi 2
Haixun Wang 2
Alin Deutsch 2
Nancy Lynch 2
Paul Sorenson 2
Marco Tagliasacchi 2
Ron Sacks-Davis 2
Jan Bussche 2
Kyriacos Pavlou 2
Michalis Potamias 2
Milena Ivanova 1
Niels Nes 1
Radu Berinde 1
Renée Miller 1
Hicham Elmongui 1
Mika Miyagishima 1
Fumio Suzuki 1
WenChin Chen 1
Janet Kolodner 1
H Hartson 1
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Ada Fu 1
Haibo Hu 1
O Buneman 1
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Bin Liu 1
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E Smith 1
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Jie Wang 1
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Valeria De Antonellis 1
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Amir Zarkesh 1
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Rick Cattell 1
Yannei Law 1
Xiangning Liu 1
P Griffiths Selinger 1
G Putzolu 1
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W Luk 1
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Omar Benjelloun 1
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Alan Aronson 1
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Ke Deng 1
Xiaofang Zhou 1
Wenfei Fan 1
Jianzhong Li 1
Kvsvn Raju 1
Henry Gladney 1
Nagui Halim 1
Ravi Kannan 1
David Cheung 1
Jonathan Shopiro 1
Hideto Ikeda 1
Henrik Björklund 1
Piotr Indyk 1
Foto Afrati 1
Jennifer Widom 1
Edward Omiecinski 1
Klaus Elhardt 1
Akhil Kumar 1
Algirdas Avižienis 1
Farid Alavian 1
Claire David 1
Derek Eager 1
Tony Tan 1
Goetz Graefe 1
Eduardo Gutarra 1
Alin Deutsch 1
Prasenjit Mitra 1
Véronique Benzaken 1
Jianliang Xu 1
Jayant Madhavan 1
John Keen 1
Giuseppe Pozzi 1
Kazimierz Subieta 1
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Shashi Gadia 1
Andrey Balmin 1
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Ioana Manolescu 1
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William Dally 1
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Richard Karp 1
Philip Bohannon 1
Roberto Zicari 1
Frank Pittelli 1
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Licia Sbattella 1
Thanaa Ghanem 1
Yücel Saygın 1
Sudarshan Chawathe 1
Leslie Lamport 1
Sunil Kamath 1
Yaming Yu 1
Charles Welty 1
Hirofumi Katsuno 1
Antonios Deligiannakis 1
Eugene Agichtein 1
Narayanan Krishnakumar 1
Di Yang 1
Jane Liu 1
Erik Vee 1
Atul Adya 1
Kristoffer Rose 1
Tamir Tassa 1
John Grant 1
Chun Chen 1
Yinian Qi 1
Jeannie Shands 1
Herman Lam 1
Rod Price 1
Hans Hinterberger 1
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Nikos Lorentzos 1
Uwe Röhm 1
Naga Govindaraju 1
Steve Fox 1
Philip Lewis 1
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Allan Kent 1
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Jozo Dujmović 1
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Viswanath Poosala 1
J Skeen 1
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Donald Slutz 1
Richard Baum 1
Dertsai Lee 1
Michael Wilens 1
James Cash 1
Jack Milton 1
Markos Zaharioudakis 1
Henryk Rybiński 1
RamSewak Sharma 1
Greg Fu 1
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Lei Sheng 1
Peter Revesz 1
Wei Hong 1
Chun Leng 1
Haim Mendelson 1
Abdel Farrag 1
Chaoyi Pang 1
Thomas Schwarz 1
Daniel Abadi 1
Hongyan Liu 1
Xiaoyu Wang 1
András Salamon 1
Stavros Papadopoulos 1
Heonyoung Yeom 1
Sudeepa Roy 1
Danielyang Li 1
Jixue Liu 1
Sławek Staworko 1
Xiaochun Yang 1
Yaoshu Wang 1
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Hweehwa Pang 1
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Fabian Moerchen 1
Mehdi Sharifzadeh 1
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Gang Qian 1
Robert Frankel 1
Glenn Thomas 1
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Boduo Li 1
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Fragkiskos Pentaris 1
Larry Kerschberg 1
Yael Amsterdamer 1
Gerald Popek 1
Antonio Furtado 1
Henryk Woźniakowski 1
Yishan Jiao 1
Martin Ester 1
Grant Wang 1
Kithung Cheng 1
Robert Hartmann 1
Jane Fedorowicz 1

Affiliation Paper Counts
Illinois State University 1
North Dakota State University 1
Pohang University of Science and Technology 1
The Graduate Center 1
Miami University Oxford 1
Universitat Pompeu Fabra 1
Griffith University 1
Public University of Navarrea 1
Alexandria University 1
Concordia University, Montreal 1
U.S. Army Research Laboratory 1
University of Belgrade 1
SAP AG 1
Free Universities of Brussels 1
Schlumberger 1
Amdahl Corporation 1
General Research Corporation 1
Fujitsu Services Limited 1
Siemens USA 1
Universite Paris-Est 1
Niihama National College of Technology 1
King Abdullah University of Science and Technology 1
Academic College of Tel-Aviv - Yaffo 1
Computer Sciences Corp. 1
Zirve University 1
Hamad bin Khalifa University 1
INRIA Saclay 1
Specifications and Verification Laboratory 1
University of Stuttgart 1
Dalhousie University 1
University of Kentucky 1
Charles University in Prague 1
Oregon Health and Science University 1
University of Heidelberg 1
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ACM Transactions on Database Systems (TODS) - Invited Paper from ICDT 2015, SIGMOD 2014, EDBT 2014 and Regular Papers
Archive


2016
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2003
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1991
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1990
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1989
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1988
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1987
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1986
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1985
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1984
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1983
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1982
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1981
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1980
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1979
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1978
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1977
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1976
Volume 1 Issue 4, Dec. 1976
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Volume 1 Issue 1, March 1976 Special issue: papers from the international conference on very large data bases: September 22–24, 1975, Framingham, MA
 
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