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Synchronization of Queries and Views Upon Schema Evolutions

One of the problems arising upon the evolution of a database schema is that some queries and views defined on the previous schema version might no... (more)

Capturing Missing Tuples and Missing Values

Databases in real life are often neither entirely closed-world nor entirely open-world. Databases in an enterprise are typically partially closed, in which a part of the data is constrained by master data that contains complete information about the enterprise in certain aspects. It has been shown that, despite missing tuples, such a database may... (more)

Plan Bouquets

Identifying efficient execution plans for declarative OLAP queries typically entails estimation of several predicate selectivities. In practice, these estimates often differ significantly from the values actually encountered during query execution, leading to poor plan choices and grossly inflated response times. We propose here a conceptually new... (more)

Random Walk with Restart on Large Graphs Using Block Elimination

Given a large graph, how can we calculate the relevance between nodes fast and accurately? Random walk with restart (RWR) provides a good measure for... (more)

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;... (more)

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... (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.

The Goal Behind the Action: Towards Goal-aware Systems and Applications

Human activity is almost always intentional, be it in a physical context or as part of an interaction with a computer system. By understanding why user-generated events are happening and what purposes they serve, a system can offer a significantly improved and more engaging experience. However, goals and intentions cannot be easily captured. Analyzing user actions such as clicks and purchases can reveal patterns and behaviors but understanding the goals behind these actions is a different and challenging issue. Our work presents a unified, multi-disciplinary, and generic viewpoint for goal management that covers many different cases where goals can be used and techniques with which they can be exploited. Its purpose is to provide a common reference point to the concepts and challenging tasks that should be formally defined when someone wants to approach a data analysis problem from a goal-oriented point of view. This work also serves as a springboard to discuss several open challenges and opportunities for goal-oriented approaches in data management, analysis and sharing systems and applications.

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.

Exploiting integrity constraints for cleaning trajectories of RFID-monitored objects

A probabilistic framework for cleaning the data collected by RFID-tracking systems is introduced. What has to be cleaned is the set of trajectories that are the possible interpretations of the readings: a trajectory in this set is a sequence whose generic element is a location covered by the reader(s) that performed the detection at the corresponding time point. The cleaning is guided by integrity constraints, and consists in discarding the inconsistent trajectories and assigning to the others a suitable probability of being the actual ones. The probabilities are evaluated by adopting probabilistic conditioning, that logically consists in these steps. First, the trajectories are assigned a-priori probabilities, obtained by relying on the independence assumption between distinct time points. Then, the probability of each consistent trajectory is revised to take into account the spatio-temporal correlations encoded by the constraints. This is done by conditioning the a-priori probability of each trajectory to the event that the constraints are satisfied: this means taking the ratio of this a-priori probability to the sum of the a-priori probabilities of all the consistent trajectories. Instead of performing these steps by materializing all the trajectories and their a-priori probabilities (which is infeasible, owing to the typically huge number of trajectories to be considered), our approach exploits a data structure (ct-graph) that enables a compact representation of the consistent trajectories and their conditioned probabilities, and an algorithm for efficiently constructing the ct-graph, that progressively builds it while avoiding the construction of portions of the graph corresponding to inconsistent trajectories.

Editorial: The Dark Citations of TODS Papers and What to Do About Itor: Cite the Journal Paper

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 918
Citation Count 29603
Available for Download 918
Downloads (6 weeks) 4083
Downloads (12 Months) 35967
Downloads (cumulative) 771875
Average downloads per article 841
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 ACM 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 ACM A. M. Turing Award (1998)
ACM Software System Award (1988)
ACM Programming Systems and Languages Paper Award (1982)
Jayant R Haritsa ACM Distinguished Member (2009)
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 ACM 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 ACM 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 ACM A. M. Turing Award (1993)
Michael Stonebraker ACM A. M. Turing Award (2014)
ACM Software System Award (1988)
Robert E Tarjan ACM Paris Kanellakis Theory and Practice Award (1999)
ACM 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)
Yang Xiang ACM Senior Member (2016)

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
Dan Suciu 8
Eugene Wong 8
Minos Garofalakis 8
Hanan Samet 8
Dimitris Papadias 8
Sushil Jajodia 8
Phokion Kolaitis 8
Victor Vianu 8
Wenfei Fan 7
Michael Stonebraker 7
Clement Yu 7
Stefano Ceri 7
Don Batory 7
Christian Jensen 7
Meral Özsoyoğlu 7
Wangchiew Tan 7
Raghu Ramakrishnan 7
Serge Abiteboul 7
Hosagrahar Jagadish 7
Surajit Chaudhuri 6
David DeWitt 6
Yannis Ioannidis 6
Leonid Libkin 6
Yehoshua Sagiv 6
Alberto Mendelzon 6
Marianne Winslett 6
Carlo Zaniolo 6
Won Kim 6
Nick Koudas 6
Graham Cormode 6
Floris Geerts 6
VS Subrahmanian 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
Marcelo Arenas 5
Divesh Srivastava 5
Jef Wijsen 5
Laks Lakshmanan 5
Amr El Abbadi 5
Gültekin Özsoyoglu 5
George Kollios 5
Nikos Mamoulis 5
Stijn Vansummeren 5
Per Larson 5
Catriel Beeri 5
David Shipman 5
Michael Franklin 5
Kotagiri Ramamohanarao 5
Shibing Yao 5
Christopher Jermaine 5
Michael Böhlen 5
Jennifer Widom 5
Ke Yi 4
Benny Kimelfeld 4
Henry Korth 4
Philip Yu 4
David Maier 4
Manlung Yiu 4
Yinong Chen 4
Tiko Kameda 4
Lucian Popa 4
David Lomet 4
Stavros Christodoulakis 4
Arie Shoshani 4
Phillip Gibbons 4
Dimitrios Gunopulos 4
Florin Rusu 4
Paolo Ciaccia 4
Ziyang Liu 4
Xiaokui Xiao 4
Shamkant Navathe 4
Raymond Ng 4
Georg Gottlob 4
Mario Schkolnick 4
Dan Olteanu 4
Peter Buneman 4
Nick Roussopoulos 4
Dennis Shasha 4
Bengchin Ooi 4
Jan Chomicki 4
Stanley Su 4
Dorothy Denning 4
Sara Cohen 4
Kenneth Sevcik 4
Stefano Paraboschi 4
Michael Carey 4
Pierangela Samarati 3
Peter Lockemann 3
Jorge Pérez 3
Marios Hadjieleftheriou 3
Marco Patella 3
Dmitri Kalashnikov 3
Mankeung Siu 3
Esen Ozkarahan 3
Wim Martens 3
Miron Livny 3
Paolo Tiberio 3
Neoklis Polyzotis 3
Gustavo Alonso 3
Gautam Das 3
Oded Shmueli 3
Christoph Koch 3
Martin Kersten 3
Walid Aref 3
Raymond Lorie 3
Yiping Ke 3
Elke Rundensteiner 3
Arnon Rosenthal 3
Edwin Jacox 3
Edward Sciore 3
Markus Schneider 3
James Rothnie 3
Piero Fraternali 3
Joseph Hellerstein 3
Krithi Ramamritham 3
Yannis Papakonstantinou 3
Nicolas Bruno 3
Gio Wiederhold 3
Cheng Sheng 3
Jan Paredaens 3
Anastasia Ailamaki 3
Thomas Eiter 3
Bettina Kemme 3
Kenneth Salem 3
Giuseppe Pelagatti 3
Richard Hull 3
Wei Wang 3
Ben Shneiderman 3
Toon Calders 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
Leonid Libkin 3
Jeffrey Vitter 3
Douglas Comer 3
James Cheng 3
Rakesh Agrawal 3
Jim Gray 3
Wilfred Ng 3
Cyrus Shahabi 3
Sergey Melnik 3
Anthony Klug 3
Alfred Aho 3
Jeffreyxu Yu 3
Goetz Graefe 3
Patrick Valduriez 3
Elena Baralis 3
Kevin Chang 3
David Stemple 3
K Lam 3
Dennis McLeod 3
Walter Burkhard 3
Kianlee Tan 3
Wiebren De Jonge 3
James Clifford 3
Alan Fekete 3
Debabrata Dey 3
John Robinson 3
Michael Benedikt 3
Thomas Schwentick 3
Panagiotis Ipeirotis 3
Eliezer Lozinskii 3
Tova Milo 3
Vijay Raghavan 3
Panos Kalnis 3
Sebastian Link 3
Luc Segoufin 3
Guy Lohman 3
Toshihide Ibaraki 3
Nicolas Spyratos 2
Sven Hartmann 2
Mark Levene 2
Gísli Hjaltason 2
Zhewei Wei 2
Gerome Miklau 2
Sonia Bergamaschi 2
Nikolaus Augsten 2
Haixun Wang 2
Nancy Lynch 2
Marco Tagliasacchi 2
Paul Sorenson 2
Hamid Pirahesh 2
Letizia Tanca 2
Antonios Deligiannakis 2
Giovanni Sacco 2
Mingxi Wu 2
Feifei Li 2
Xifeng Yan 2
Christos Polyzois 2
Wolfgang Effelsberg 2
Dina Bitton 2
Marta Patiño-Martínez 2
Moshe Vardi 2
Pankaj Agarwal 2
Yin Yang 2
Andrew McGregor 2
James Cheney 2
Giorgio Ghelli 2
Assaf Schuster 2
Ron Obermarck 2
E Babb 2
Calvin Gotlieb 2
Marco Casanova 2
Jiawei Han 2
Torsten Grust 2
Patricia Griffiths 2
Maurice Herlihy 2
Kyriakos Mouratidis 2
Mauro Negri 2
Debra Vandermeer 2
Ting Yu 2
Davide Martinenghi 2
Christopher 2
Guoliang Li 2
Claudio Bettini 2
Georgia Koutrika 2
John Smith 2
Louiqa Raschid 2
Peter Wood 2
Val Tannen 2
Lee Hollaar 2
Junghoo Cho 2
Dario Colazzo 2
Alan Nash 2
John Kam 2
Todd Green 2
Balder Cate 2
Bingsheng He 2
Vagelis Hristidis 2
Patrick O'Neil 2
Joseph Wald 2
Vassilis Athitsos 2
Chaitanya Mishra 2
Williamfrank King 2
H Kung 2
Sanjeev Khanna 2
Weidong Chen 2
Yannis Manolopoulos 2
Claudio GutiéRrez 2
Alexander Markowetz 2
Yaacov Weiss 2
Alin Deutsch 2
Yidong Yuan 2
Liyan Yuan 2
Jian Pei 2
Kyriacos Pavlou 2
Jan Bussche 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
Gabriel Kuper 2
Jürg Nievergelt 2
Mohamed Mokbel 2
Philip Lehman 2
Michael Hammer 2
Peter Denning 2
Robert Goldstein 2
Morton Astrahan 2
James Mehl 2
Evaggelia Pitoura 2
Elisa Bertino 2
Raymond Wong 2
Diane Smith 2
Ting Deng 2
Ilaria Bartolini 2
Sakti Pramanik 2
Werner Nutt 2
Theo Härder 2
Gao Cong 2
Romulo Gonçalves 2
Qing Zhang 2
Ricardo Jiménez-Peris 2
Alistair Moffat 2
Wei Wang 2
Kesheng Wu 2
Paolo Atzeni 2
Wenchi Hou 2
Francesco Malvestuto 2
Stephen Sherman 2
Sergio Flesca 2
Andrew Whinston 2
Kenneth Ross 2
Chinwan Chung 2
Angela Bonifati 2
Tom Ameloot 2
Balder Ten Cate 2
Subramanian Arumugam 2
Abhijit Pol 2
Izchak Sharfman 2
Qing Liu 2
Yanlei Diao 2
Anastasios Kementsietsidis 2
Allen Van Gelder 2
Robert Ross 2
Panagiotis Karras 2
George Loizou 2
Jens Teubner 2
Justin Zobel 2
Reind Van De Riet 2
Amit Kumar 2
Michael Siegel 2
Fei Xu 2
Rabia Nuray-Turan 2
Filippo Furfaro 2
Curtis Dyreson 2
Chuan Xiao 2
Roger King 2
Arash Termehchy 2
Vivek Narasayya 2
Ron Sacks-Davis 2
Peter Franaszek 2
Jan Schlorer 2
Yair Wand 2
Michalis Potamias 2
David Embley 2
Sheldon Finkelstein 2
Geert Bex 2
Kyuseok Shim 2
Jianbin Qin 2
Tolga Bozkaya 2
Gottfried Vossen 2
Tamer Özsu 2
Christos, Papadimitriou 2
Jeffrey Naughton 2
Donghui Zhang 2
Panos Chrysanthis 2
Alexander Thomasian 2
Anindya Datta 2
Sudipto Guha 2
Barbara Pernici 2
Lei Chen 2
Pierre Bourhis 2
Jack Minker 2
Witold Litwin 2
Irving Traiger 2
Donald Chamberlin 2
Ralf Güting 2
Daniel Ries 2
Millist Vincent 2
Wenfei Fan 2
Jiaheng Lu 2
S Muthukrishnan 2
Ken Smith 2
Shimin Chen 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
Takwoon Yan 2
Christopher Reeve 2
Richard Brice 2
Donald Kossmann 2
Jianhua Feng 2
Victor Matos 2
Francis Chin 2
Michael Kifer 2
Shivnath Babu 2
Edward, Chan 2
Guido Moerkotte 2
C Mohan 2
Baihua Zheng 2
Hideaki Kimura 1
Elio Damaggio 1
Anuj Jaiswal 1
Massimo Franceschet 1
Angelo Montanari 1
Dingming Wu 1
Sudipto Das 1
Mohamed Khalefa 1
Louis Woods 1
Patrick Wong 1
Luca Pardini 1
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Xiangning Liu 1
P Griffiths Selinger 1
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G Putzolu 1
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W Luk 1
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Wilfred Ng 1
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Zhifeng Hao 1
Hongcheu Liu 1
Seungwon Hwang 1
C Veni Madhavan 1
Yufei Tao 1
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Arun Kumar 1
Frederick Reiss 1
Antal Novak 1
Uri Shaft 1
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Cheng Long 1
Jan Schloer 1
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Erik Vee 1
Atul Adya 1
Kristoffer Rose 1
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Alan Aronson 1
Edward Mazur 1
Ke Deng 1
Jianzhong Li 1
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Henry Gladney 1
Hideto Ikeda 1
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Ioana Manolescu 1
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William Dally 1
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Shashi Gadia 1
Richard Karp 1
Andrey Balmin 1
Venkatesan Chakravarthy 1
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Philip Bohannon 1
Roberto Zicari 1
Frank Pittelli 1
Yücel Saygın 1
Sudarshan Chawathe 1
Avraham Leff 1
Licia Sbattella 1
Leslie Lamport 1
Thanaa Ghanem 1
Sunil Kamath 1
Narayanan Krishnakumar 1
Yaming Yu 1
Charles Welty 1
Di Yang 1
Jane Liu 1
Hirofumi Katsuno 1
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John Grant 1
Chun Chen 1
Yinian Qi 1
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Donald Slutz 1
Rod Price 1
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James Cash 1
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Uwe Röhm 1
Naga Govindaraju 1
John Lloyd 1
Viswanath Poosala 1
Jeannie Shands 1
Henryk Rybiński 1
Leonard Shapiro 1
Greg Fu 1
RamSewak Sharma 1
Abhinav Gupta 1
Lei Sheng 1
Wei Hong 1
J Skeen 1
Haim Mendelson 1
Daniel Abadi 1
Jakub Závodný 1
Stavros Papadopoulos 1
Chun Leng 1
Abdel Farrag 1
Chaoyi Pang 1
Thomas Schwarz 1
Hongyan Liu 1
Xiaoyu Wang 1
András Salamon 1
Heonyoung Yeom 1
Danielyang Li 1
Jixue Liu 1
Sudeepa Roy 1
Steve Fox 1
Vishesh Karwa 1
Edward Chang 1
Sławek Staworko 1
Xiaochun Yang 1
Yaoshu Wang 1
Mehdi Sharifzadeh 1
Giuseppe Polese 1
Qiang Zhu 1
Gang Qian 1
Robert Frankel 1
Fragkiskos Pentaris 1
Glenn Thomas 1
Larry Kerschberg 1
Gerald Popek 1
Yinan Li 1
Boduo Li 1
Yael Amsterdamer 1
Antonio Furtado 1
Henryk Woźniakowski 1
Yishan Jiao 1
Robert Hartmann 1
Jane Fedorowicz 1
Milena Ivanova 1
Niels Nes 1
Radu Berinde 1
Renée Miller 1
Hicham Elmongui 1
WenChin Chen 1
Martin Ester 1
Grant Wang 1
Kithung Cheng 1
Fumio Suzuki 1
H Hartson 1
Mika Miyagishima 1
Janet Kolodner 1
Johannes Gehrke 1
Daniel Lemire 1
Vicky Papavasileiou 1
Divyakant Agrawal 1
Gabriel Ghinita 1
Saitung On 1
Joseph Ng 1
Marc Denecker 1
Álvaro Cortés-Calabuig 1
Stuart Madnick 1
Radu Ciucanu 1
Eleftherios Tiakas 1
Christopher Herot 1
J Riordon 1
Chunbin Lin 1
Jun Yang 1
Haifeng Yu 1
Genoveffa Tortora 1
Lee Sael 1
T Jayram 1
Michael Bender 1
Pranay Jain 1
Qiang Xue 1
Houtan Aghili 1
Prashant Shenoy 1
Jan Vondrák 1
Ryan Williams 1
Kexin Xie 1
Lubomir Bic 1
Tsongli Wang 1
Wen Jin 1
Hiroshi Ishikawa 1
Dennis Sasha 1
Betty Salzberg 1
Jitender Deogun 1
Rishi Sinha 1
Bin Cao 1
Christoph Koch 1
Henry Anderson 1
Jeff Phillips 1
Yifei Lu 1
Xiao Bai 1
Volkert Brosda 1
Songting Chen 1
Charu Aggarwal 1
César Galindo-Legaria 1
Scott Shenker 1
Alessandro Campi 1
Selma Özel 1
Silvia Chiusano 1
H Du 1
Kurt Rothermel 1
Paolo Paolini 1
Tomasz Imielinski 1
Yongchiang Tay 1
Henry Korth 1
Uwe Hohenstein 1
Aslihan Celik 1
Karl Schnaitter 1
Umar Minhas 1
Ning Ruan 1
Vasilis Vassalos 1
Arthur Bernstein 1
François Bancilhon 1
Ellis Horowitz 1
Anthony Baroody 1
Stan Sclaroff 1
George Karypis 1
Zheng Fang 1
Mary Loomis 1
John Byers 1
Ehud Gudes 1
David Reiner 1
Ali Hurson 1
Muhammad Cheema 1
Hans Jacobsen 1
Elio Masciari 1
Paul Ammann 1
Mikhail Atallah 1
David Hsiao 1
J Bradley 1
Derher Lo 1
Leland Beck 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
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Microsoft 9
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IBM 21
Microsoft Research 21
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IBM Thomas J. Watson Research Center 30
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Politecnico di Milano 34
University of Florida 37
University of Toronto 38
University of California, Berkeley 39
Stanford University 42
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University of Maryland 44
IBM Almaden Research Center 93

ACM Transactions on Database Systems (TODS)
Archive


2016
Volume 41 Issue 2, May 2016  Issue-in-Progress
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2015
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2014
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2013
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2012
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2010
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2007
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2006
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2005
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2004
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2003
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2002
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2001
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2000
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1999
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1998
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1997
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1996
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1995
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1994
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1993
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1992
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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
Volume 5 Issue 4, Dec. 1980
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Volume 5 Issue 1, March 1980

1979
Volume 4 Issue 4, Dec. 1979
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Volume 4 Issue 2, June 1979
Volume 4 Issue 1, March 1979

1978
Volume 3 Issue 4, Dec. 1978
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Volume 3 Issue 2, June 1978
Volume 3 Issue 1, March 1978

1977
Volume 2 Issue 4, Dec. 1977
Volume 2 Issue 3, Sept. 1977
Volume 2 Issue 2, June 1977
Volume 2 Issue 1, March 1977

1976
Volume 1 Issue 4, Dec. 1976
Volume 1 Issue 3, Sept. 1976
Volume 1 Issue 2, June 1976
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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