53,169 Hits in 4.5 sec

Semantic Update Optimization in Active Databases [chapter]

Jong P. Yoon, Larry Kerschberg
1997 IFIP Advances in Information and Communication Technology  
In an active database, an update may be constrained by integrity constraints, and may also trigger rules that, in turn, may a ect the database state.  ...  Thus, a user-speci ed update" is transformed, through semantic reformulation techniques, into a sequence of updates which together ensure semantic integrity of the original update as well as its propagated  ...  Semantic query optimization YK93 is a particular case of semantic update optimization discussed in this paper.  ... 
doi:10.1007/978-0-387-34913-8_12 fatcat:qrqroqirnnewjicpwdi7mss2h4

Page 7888 of Mathematical Reviews Vol. , Issue 99k [page]

1999 Mathematical Reviews  
(1-UCSD; La Jolla, CA) Semantics and expressiveness issues in active databases.  ...  Summary: “A formal framework is introduced for studying the semantics and expressiveness of active databases.  ... 

Monitoring Complex Rule Conditions [chapter]

Tore Risch, Martin Sköld
1999 Active Rules in Database Systems  
With incremental evaluation the state of a rule condition is materialized and, after an update, the new state of the condition is defined incrementally in terms of differences to the materialized state  ...  generated by the update.  ...  In particular we discuss how well suited the various techniques are for monitoring rule conditions in active databases.  ... 
doi:10.1007/978-1-4419-8656-6_5 fatcat:5nwicrnx2zephgbl6k5cxjxdgi

Cooperative Database Caching within Cloud Environments [chapter]

Andrei Vancea, Guilherme Sperb Machado, Laurent d'Orazio, Burkhard Stiller
2012 Lecture Notes in Computer Science  
Semantic caching is a technique used for optimizing the evaluation of database queries by caching results of old queries and using them when answering new queries.  ...  CoopSC is a cooperative database caching architecture, which extends the classic semantic caching approach by allowing clients to share their local caches in a cooperative matter.  ...  An active database server component was developed in order to handle the execution of update, insert, and delete SQL statements using triggers.  ... 
doi:10.1007/978-3-642-30633-4_3 fatcat:efl7grozhbbg3ld6f5wgaggqzq

Analysis and optimization of active databases

Danilo Montesi, Riccardo Torlone
2002 Data & Knowledge Engineering  
Rule semantics, con uence, equivalence and optimization are then formally investigated and characterized in a solid framework that naturally extends a known model for relational database transactions.  ...  A user de ned transaction, which i s v i e w ed here as a sequence of atomic database updates forming a semantic unit, is translated by means of active rules into induced one(s).  ...  s) otherwise: We are nally ready to de ne the semantics of a transaction with respect to an active database.  ... 
doi:10.1016/s0925-2312(01)00687-7 fatcat:ndhvgntsynduvnph3f7kc5x36m

Active-U-Datalog: Integrating active rules in a logical update language [chapter]

Elisa Bertino, Barbara Catania, Vincenzo Gervasi, Alessandra Raffaetà
1998 Lecture Notes in Computer Science  
This need has led to the design of active databases, in which events of various kinds (e.g., a query, an update) may cause the firing of so-called active rules.  ...  In a more advanced setting, one could ask that a semantic-aware database should be able to react correctly to changes to the data it contains, by accordingly updating other data, in order to maintain consistency  ...  therefore in performing useful compile-time optimization.  ... 
doi:10.1007/bfb0055497 fatcat:ocesboh7ujbfjkvj7zrknhkmka

Database research at Arizona State University

Susan D. Urban, Suzanne W. Dietrich, Forouzan Golshani
1996 SIGMOD record  
To avoid the costs of complete recomputation of the view in the updated database state, the materialized view can be updated incrementally using the update propagation approach provided by the PF algorithm  ...  Active rules in CDOL are modeled as conditional term rewrite rules that rewrite the current database state. Rules communicate using messages that represent update requests and occurrences of events.  ... 
doi:10.1145/381854.381892 fatcat:bnelyai2lrh5jlypswa5grgh5a

Defining Abstract Semantics for Static Dependence Analysis of Relational Database Applications [chapter]

Angshuman Jana, Raju Halder
2016 Lecture Notes in Computer Science  
As database attributes differ from traditional imperative language variables, we define abstract semantics of database applications in relational abstract domain.  ...  This allows to identify statically various parts of database information (in abstract form) possibly used or defined by database statements, leading to a more precise dependence analysis.  ...  Some of the worth-mentioning software engineering activities where semantics-based dependences in database applications play crucial roles are program slicing, language-based information-flow analyses,  ... 
doi:10.1007/978-3-319-49806-5_8 fatcat:2axv2qcajjgovk3ct76m2n45sa

Page 5002 of Mathematical Reviews Vol. , Issue 96h [page]

1996 Mathematical Reviews  
and operational semantics of passive and active updates in logic databases.  ...  “There are two kinds of atomic updates in PDDL, passive and active updates.  ... 

Active complex event processing

Di Wang, Elke A. Rundensteiner, Han Wang, Richard T. Ellison
2010 Proceedings of the VLDB Endowment  
Moreover we design an Active CEP infrastructure, that integrates the active rule component into the CEP kernel, allowing finegrained and optimized rule processing.  ...  to perform hygiene precautions in real-time.  ...  The processor in our system also handles CEP queries that integrate relational database lookup, typically access to the semantic repository.  ... 
doi:10.14778/1920841.1921034 fatcat:7opqsjapinaplkxcukqfskstui

Page 6174 of Mathematical Reviews Vol. , Issue 91K [page]

1991 Mathematical Reviews  
Current trends of active database research, features and implementation problems of such databases are discussed in this article.  ...  Our results show that the expected behavior of MEDIAN is within 10% of optimal and is asymptotically optimal as n/m — oo or as n/m — 0.” 91k:68030 68P15 Bekich, Zoran Active data bases: an analytic survey  ... 

The design and implementation of the Ariel active database rule system

E.N. Hanson
1996 IEEE Transactions on Knowledge and Data Engineering  
Similar to System R and other relational database systems,Ariel has a front-end consisting of a lexer, parser, semantic analyzer, and query optimizer.  ...  Transformation of databases from passive to active is a landmark in the evolution of DBMS technology.  ... 
doi:10.1109/69.485644 fatcat:bvwgaald4nekxpizqzpfytjhv4

SQOPI: Semantic Query Optimization Framework

Mohamed MounirHassan, Ahmed Mohammed Sultan
2014 International Journal of Computer Applications  
Semantic query optimization uses semantic knowledge in databases to rewrite queries and logic programs for the purpose of more efficient query evaluation.  ...  There has been a large body of work in the area of semantic query optimization.  ...  In this environment, any query optimization that reduces disk activity is likely to be significant.  Third, Distributed databases, where a single logical database comprises several geographically distant  ... 
doi:10.5120/16800-6516 fatcat:gis5ke73prdivnkb6cqnjoowxi

Analysis of Data Dependency Based Intrusion Detection System [chapter]

Yermek Nugmanov, Brajendra Panda, Yi Hu
2009 Lecture Notes in Computer Science  
We developed a step by step approach that helps in determining the optimal configuration expressed by the response strategy and the threshold value.  ...  This research focuses on analyzing the cost effectiveness of a database intrusion detection system that uses dependencies among data items to detect malicious transactions.  ...  Acknowledgement This research has been supported in part by US AFOSR under grant FA 9550-04-1-0429 and the KY NSF EPSCoR program. We are thankful to Dr. Robert. L.  ... 
doi:10.1007/978-3-642-03007-9_8 fatcat:zsqdwiubxzh5jg543vi65u6tb4

Image Retrieval using Long-Term Semantic Learning

Matthieu Cord, Philippe H. Gosselin
2006 2006 International Conference on Image Processing  
We introduce in this paper a supervised optimization of a set of feature vectors.  ...  Experiments have been carried out on a large generalist database in order to validate our approach.  ...  We recently proposed a kernel matrix updating method, to exploit semantic labels for generalist database management [10] .  ... 
doi:10.1109/icip.2006.313127 dblp:conf/icip/CordG06 fatcat:5zlbqiyjd5d6hixtzzhh3yydba
« Previous Showing results 1 — 15 out of 53,169 results