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CORR
2010
Springer
141views Education» more  CORR 2010»
15 years 6 months ago
A database approach to information retrieval: The remarkable relationship between language models and region models
In this report, we unify two quite distinct approaches to information retrieval: region models and language models. Region models were developed for structured document retrieval....
Djoerd Hiemstra, Vojkan Mihajlovic
PROCEDIA
2010
113views more  PROCEDIA 2010»
15 years 5 months ago
Exploring utilisation of GPU for database applications
This study is devoted to exploring possible applications of GPU technology for acceleration of the database access. We use the n-gram based approximate text search engine as a tes...
Slawomir Walkowiak, Konrad Wawruch, Marita Nowotka...
ICDE
2004
IEEE
85views Database» more  ICDE 2004»
16 years 8 months ago
Selectivity Estimation for String Predicates: Overcoming the Underestimation Problem
Queries with (equality or LIKE) selection predicates over string attributes are widely used in relational databases. However, state-of-the-art techniques for estimating selectivit...
Surajit Chaudhuri, Venkatesh Ganti, Luis Gravano
SIGMOD
2001
ACM
93views Database» more  SIGMOD 2001»
16 years 6 months ago
XQuery Formal Semantics: State and Challenges
The XQuery formalization is an ongoing effort of the W3C XML Query working group to define a precise formal semantics for XQuery. This paper briefly introduces the current state o...
Peter Fankhauser
XIMEP
2004
ACM
88views Database» more  XIMEP 2004»
16 years 3 days ago
XQuery Processing in Natix with an Emphasis on Join Ordering
We give an overview on how XQuery processing works in our native XML database system Natix. After a brief description of the query compiler we focus on the aspect of join ordering...
Norman May, Sven Helmer, Carl-Christian Kanne, Gui...