quotes.xml. 9. NiagaraCQ. Group Signature. Common expression signature of all queries in the group ... quotes.xml. 13. NiagaraCQ. Incremental Grouping Algorithm (2) ...
NiagaraCQ : A Scalable Continuous Query System for Internet Databases (modified s available on course webpage) Jianjun Chen et al Computer Sciences Dept.
Inform me when there is a new publication related to multi-query optimization ... Handles both change based and timer based queries in a uniform way. NiagaraCQ ...
Where Quotes Quote Symbol MSFT / / / element_as $g in 'http://www.stock.com/quotes.xml' ... MSFT. Dest. I. INTC. The group plan. Incremental Grouping Algo ...
... Challenging meta problems in AQP for continuous queries need to be addressed Larger and more complex plan ... queries need to ... Correlated & skewed data ...
Streaming views over Streaming Data Sirish Chandrasekaran Query Engine Features Scale along: # data streams frequency of data arrival #queries Wave-indices ...
Samuel Madden, Mehul Shah, Joseph ... Dynamic operator ordering avoids static optimizer danger ... Policy dynamically orders operators on a per tuple basis ...
... Overview of current Stream Systems. Preview of My Project. What is it? Stream of multimedia data from ... Stream Processing Engine. Handle all the requirements ...
Enables flexible sharing of operators between queries. Grouped Filter ... Trading accounting overhead for work sharing ... When a shared operator outputs a ...
XML message brokers: central exchange points for messages sent ... The message broker matches data items to queries, transforms them, and routes the results. ...
But, CQs are long running. Initially valid assumptions less so over time ... Long running, 'standing queries', similar to trigger systems. Exclusively read-only ...
... work on Adaptive Query Processing (AQP) in different contexts ... Example CQ: Filtering ... To bring out AQP algorithms and features, not performance numbers ...
Multimedia Data Stream Management System By David Kleinman Outline Definition Motivating Examples Nine Requirements Current Systems Comparison Brief Overview of ...
Stream Anomaly Monitoring System (SAMS) is an important sub-class of stream applications. ... an approach for SAMS's that implements incremental evaluation ...
Title: Database/Network Convergence Author: Joe Hellerstein Last modified by: Joe Hellerstein Created Date: 12/6/2001 9:51:31 PM Document presentation format
Comparison. New Ideas. Conclusions. Adaptive Query Processing in the Looking Glass ... No exhaustive, in-depth categorization and comparison of AQP systems to date ...
Title: Gliederung Author: Professor Kemper Last modified by: Professor Kemper Created Date: 3/1/2001 9:51:54 AM Document presentation format: Bildschirmpr sentation
Can be exhausted - tens to hundreds of MBs of data / sensor. Wireless ... Alternatives: ripple-join, Xjoin, etc. Partial Results. Feb 28, 2002. Fjording ICDE ...
... tuples and route to multiple user queries to hide query load from ... sample rate based on user demand ... Proxy combines user queries, pushes down ...
Continuous, unbounded, rapid, time-varying streams of data ... Sliding windows, synopsis, samples, load-shed. Major Issues? Metric for set-valued queries ...
... the plane to the sales meeting in Atlanta last spring? ... Most of the information in my PetDB isn't unique to me: magazine article, web page, stock quote. ...
Choosing which operator to route a given tuple to. The brain of the eddy ... E.g. hash join operator builds a hash table on one relation first, and then ...
V IN $N/text()='Galaxy' Conversion of XPath expressions into ... Only child and descendant axes. All predicates of a query must fire before the target element ...
Benefits of Path Summaries in an XML Query Optimizer Supporting ... Timber, Niagara, BEA/XQRL, Natix,ToX) XQuery systems (e.g. Galax, IPSI-SQ, XSM, MS-XQuery) ...
A distributed sensing network comprised of a large number of small sensing ... Uses Emstar (J. Elson et al), a Linux-based emulator/simulator for sensor networks. ...
Sounds like a database... New Problems In Sensor Databases. Sensors unreliable ... To query sensors, need a way to locate, identify properties, extract values ...
Data Systems Group, UCF. Fall 2005. Outline. Introduction to Data Management in Mobile Computing. ... GPS: Global Positioning System. Accuracy: up to 3 meters or more. ...
DSMS Research Projects. Aurora (Brandeis/Brown/MIT) http://www.cs. ... Most DSMS projects use SQL queries spanning both data streams and DBs will be easier. ...
... the PL accesses the tuples returned by SQL using a Get Next of Cursor statement. ... But cursors is a pull-based' mechanism and cannot be used on data streams: the ...