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» Join operations in temporal databases
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SIGMOD
2003
ACM
115views Database» more  SIGMOD 2003»
15 years 9 months ago
Temporal Coalescing with Now, Granularity, and Incomplete Information
This paper presents a novel strategy for temporal coalescing. Temporal coalescing merges the temporal extents of value-equivalent tuples. A temporal extent is usually coalesced of...
Curtis E. Dyreson
VLDB
2007
ACM
229views Database» more  VLDB 2007»
15 years 3 months ago
Sum-Max Monotonic Ranked Joins for Evaluating Top-K Twig Queries on Weighted Data Graphs
In many applications, the underlying data (the web, an XML document, or a relational database) can be seen as a graph. These graphs may be enriched with weights, associated with t...
Yan Qi 0002, K. Selçuk Candan, Maria Luisa ...
VLDB
1998
ACM
121views Database» more  VLDB 1998»
15 years 1 months ago
Hash Joins and Hash Teams in Microsoft SQL Server
The query execution engine in Microsoft SQL Server employs hash-based algorithms for inner and outer joins, semi-joins, set operations (such as intersection), grouping, and duplic...
Goetz Graefe, Ross Bunker, Shaun Cooper
EDBT
2008
ACM
154views Database» more  EDBT 2008»
15 years 9 months ago
Ring-constrained join: deriving fair middleman locations from pointsets via a geometric constraint
We introduce a novel spatial join operator, the ring-constrained join (RCJ). Given two sets P and Q of spatial points, the result of RCJ consists of pairs p, q (where p P, q Q) ...
Man Lung Yiu, Panagiotis Karras, Nikos Mamoulis
ICDE
2007
IEEE
173views Database» more  ICDE 2007»
15 years 11 months ago
Adaptive Load Diffusion for Multiway Windowed Stream Joins
In this paper, we present an adaptive load diffusion operator to enable scalable processing of Multiway Windowed Stream Joins (MWSJs) using a cluster system. The load diffusion is...
Xiaohui Gu, Philip S. Yu, Haixun Wang