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    PODS
    2006
    ACM
    196views Database» more  PODS 2006»
    The containment problem for REAL conjunctive queries with inequalities
    14 years 11 months ago
    The containment problem for REAL conjunctive queries with inequalities
    Download  www.almaden.ibm.com
    Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...
    T. S. Jayram, Phokion G. Kolaitis, Erik Vee
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    PODS
    2006
    ACM
    156views Database» more  PODS 2006»
    From statistical knowledge bases to degrees of belief: an overview
    14 years 11 months ago
    From statistical knowledge bases to degrees of belief: an overview
    Download  www.cs.cornell.edu
    An intelligent agent will often be uncertain about various properties of its environment, and when acting in that environment it will frequently need to quantify its uncertainty. ...
    Joseph Y. Halpern
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    PODS
    2006
    ACM
    132views Database» more  PODS 2006»
    Principles of dataspace systems
    14 years 11 months ago
    Principles of dataspace systems
    Download  www.cs.washington.edu
    The most acute information management challenges today stem from organizations relying on a large number of diverse, interrelated data sources, but having no means of managing the...
    Alon Y. Halevy, Michael J. Franklin, David Maier
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    PODS
    2006
    ACM
    88views Database» more  PODS 2006»
    Structural characterizations of the semantics of XPath as navigation tool on a document
    14 years 11 months ago
    Structural characterizations of the semantics of XPath as navigation tool on a document
    Download  www.cs.indiana.edu
    Given a document D in the form of an unordered labeled tree, we study the expressibility on D of various fragments of XPath, the core navigational language on XML documents. We gi...
    Marc Gyssens, Jan Paredaens, Dirk Van Gucht, Georg...
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    PODS
    2006
    ACM
    134views Database» more  PODS 2006»
    Approximate quantiles and the order of the stream
    14 years 11 months ago
    Approximate quantiles and the order of the stream
    Download  www.cis.upenn.edu
    Recently, there has been an increased focus on modeling uncertainty by distributions. Suppose we wish to compute a function of a stream whose elements are samples drawn independen...
    Sudipto Guha, Andrew McGregor
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    PODS
    2006
    ACM
    95views Database» more  PODS 2006»
    Randomized computations on large data sets: tight lower bounds
    14 years 11 months ago
    Randomized computations on large data sets: tight lower bounds
    Download  www2.informatik.hu-berlin.de
    We study the randomized version of a computation model (introduced in [9, 10]) that restricts random access to external memory and internal memory space. Essentially, this model c...
    André Hernich, Martin Grohe, Nicole Schweik...
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    PODS
    2006
    ACM
    104views Database» more  PODS 2006»
    Tractable database design through bounded treewidth
    14 years 11 months ago
    Tractable database design through bounded treewidth
    Download  www.dbai.tuwien.ac.at
    Given that most elementary problems in database design are NP-hard, the currently used database design algorithms produce suboptimal results. For example, the current 3NF decompos...
    Georg Gottlob, Reinhard Pichler, Fang Wei
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    PODS
    2006
    ACM
    137views Database» more  PODS 2006»
    Data exchange: computing cores in polynomial time
    14 years 11 months ago
    Data exchange: computing cores in polynomial time
    Download  users.comlab.ox.ac.uk
    Data exchange deals with inserting data from one database into another database having a different schema. We study and solve a central computational problem of data exchange, nam...
    Georg Gottlob, Alan Nash
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    PODS
    2006
    ACM
    107views Database» more  PODS 2006»
    Programmable clustering
    14 years 11 months ago
    Programmable clustering
    Download  research.microsoft.com
    We initiate a novel study of clustering problems. Rather than specifying an explicit objective function to optimize, our framework allows the user of clustering algorithm to speci...
    Sreenivas Gollapudi, Ravi Kumar, D. Sivakumar
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    PODS
    2006
    ACM
    107views Database» more  PODS 2006»
    Asking the right questions: model-driven optimization using probes
    14 years 11 months ago
    Asking the right questions: model-driven optimization using probes
    Download  www.cis.upenn.edu
    Ashish Goel, Sudipto Guha, Kamesh Munagala
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