Limiting scans of loosely ordered and/or grouped relations...

Details Limiting scans of loosely ordered and/or grouped relations... Limiting scans of loosely ordered and/or grouped relations...

2005-12-06

2005-12-06

Ali, Mohammad (Department: 2167)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000

Reexamination Certificate

active

06973452

ABSTRACT:
A large information space is divided into many smaller information extents. These extents are annotated with statistics about the information they contain. When a search for information includes a restriction based on value, the desired value ranges can be compared to the value ranges of each extent. If the desired value range lies outside the range of the extent, then the extent cannot hold the desired value and does not need to be included in the search.

REFERENCES:
patent: 4205371 (1980-05-01), Feather
patent: 4914586 (1990-04-01), Swinehart et al.
patent: 5414808 (1995-05-01), Williams
patent: 5560005 (1996-09-01), Hoover et al.
patent: 5806079 (1998-09-01), Rivette et al.
patent: 6173287 (2001-01-01), Eberman et al.
patent: 6687876 (2004-02-01), Schilit et al.

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