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ICDE
2011
IEEE
274views Database» more  ICDE 2011»
14 years 8 months ago
SQPR: Stream query planning with reuse
—When users submit new queries to a distributed stream processing system (DSPS), a query planner must allocate physical resources, such as CPU cores, memory and network bandwidth...
Evangelia Kalyvianaki, Wolfram Wiesemann, Quang Hi...
EDBT
2002
ACM
125views Database» more  EDBT 2002»
16 years 4 months ago
Estimating Answer Sizes for XML Queries
Abstract. Estimating the sizes of query results, and intermediate results, is crucial to many aspects of query processing. In particular, it is necessary for effective query optimi...
Yuqing Wu, Jignesh M. Patel, H. V. Jagadish
DPD
1998
117views more  DPD 1998»
15 years 4 months ago
Solving Local Cost Estimation Problem for Global Query Optimization in Multidatabase Systems
To meet users’ growing needs for accessing pre-existing heterogeneous databases, a multidatabase system (MDBS) integrating multiple databases has attracted many researchers recen...
Qiang Zhu, Per-Åke Larson
ICDE
2005
IEEE
83views Database» more  ICDE 2005»
16 years 6 months ago
Increasing the Accuracy and Coverage of SQL Progress Indicators
Recently, progress indicators have been proposed for long-running SQL queries in RDBMSs. Although the proposed techniques work well for a subset of SQL queries, they are prelimina...
Gang Luo, Jeffrey F. Naughton, Curt J. Ellmann, Mi...
ICDE
2003
IEEE
122views Database» more  ICDE 2003»
16 years 6 months ago
XML Publishing: Look at Siblings too!
In order to publish a nested XML document from flat relational data, multiple SQL queries are often needed. The efficiency of publishing relies on how fast these queries can be ev...
Sihem Amer-Yahia, Yannis Kotidis, Divesh Srivastav...