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SIGMOD
1997
ACM
113views Database» more  SIGMOD 1997»
13 years 9 months ago
Size Separation Spatial Join
The Partitioned Based Spatial-Merge Join (PBSM) of Patel and DeWitt and the Size Separation Spatial Join (S3 J) of Koudas and Sevcik are considered to be among the most efficient ...
Nick Koudas, Kenneth C. Sevcik
SIGMOD
1997
ACM
172views Database» more  SIGMOD 1997»
13 years 9 months ago
An Array-Based Algorithm for Simultaneous Multidimensional Aggregates
Computing multiple related group-bys and aggregates is one of the core operations of On-Line Analytical Processing (OLAP) applications. Recently, Gray et al. [GBLP95] proposed the...
Yihong Zhao, Prasad Deshpande, Jeffrey F. Naughton
SIGMOD
1997
ACM
125views Database» more  SIGMOD 1997»
13 years 9 months ago
The Distributed Information Search Component (Disco) and the World Wide Web
The Distributed Information Search COmponent (Disco) is a prototype heterogeneous distributed database that accesses underlying data sources. The Disco prototype currently focuses...
Anthony Tomasic, Rémy Amouroux, Philippe Bo...
SIGMOD
1997
ACM
134views Database» more  SIGMOD 1997»
13 years 9 months ago
Similarity-Based Queries for Time Series Data
We study similarity queries for time series data where similarity is defined in terms of a set of linear transformations on the Fourier series representation of a sequence. We ha...
Davood Rafiei, Alberto O. Mendelzon
SIGMOD
1997
ACM
159views Database» more  SIGMOD 1997»
13 years 9 months ago
On-Line Warehouse View Maintenance
Data warehouses store materialized views over base data from external sources. Clients typically perform complex read-only queries on the views. The views are refreshed periodical...
Dallan Quass, Jennifer Widom
SIGMOD
1997
ACM
160views Database» more  SIGMOD 1997»
13 years 9 months ago
Improved Query Performance with Variant Indexes
: The read-mostly environment of data warehousing makes it possible to use more complex indexes to speed up queries than in situations where concurrent updatesare present. The curr...
Patrick E. O'Neil, Dallan Quass
SIGMOD
1997
ACM
131views Database» more  SIGMOD 1997»
13 years 9 months ago
Maintenance of Data Cubes and Summary Tables in a Warehouse
Data warehouses contain large amounts of information, often collected from a variety of independent sources. Decision-support functions in a warehouse, such as on-line analytical ...
Inderpal Singh Mumick, Dallan Quass, Barinderpal S...
SIGMOD
1997
ACM
83views Database» more  SIGMOD 1997»
13 years 9 months ago
SEMCOG: An Object-based Image Retrieval System and Its Visual Query Interface
Wen-Syan Li, K. Selçuk Candan, Kyoji Hirata...
SIGMOD
1997
ACM
146views Database» more  SIGMOD 1997»
13 years 9 months ago
Concurrency and Recovery in Generalized Search Trees
This paper presents general algorithms for concurrency control in tree-based access methods as well as a recovery protocol and a mechanism for ensuring repeatable read. The algori...
Marcel Kornacker, C. Mohan, Joseph M. Hellerstein
SIGMOD
1997
ACM
107views Database» more  SIGMOD 1997»
13 years 9 months ago
Efficiently Supporting Ad Hoc Queries in Large Datasets of Time Sequences
Flip Korn, H. V. Jagadish, Christos Faloutsos