Estimation of input/output requirements for table probe in...

Details Estimation of input/output requirements for table probe in... Estimation of input/output requirements for table probe in...

2002-08-29

2010-10-26

Nguyen, Cam-Linh (Department: 2161)

Data processing: database and file management or data structures

Database and file access

Query optimization

C707S719000

Reexamination Certificate

active

07822740

ABSTRACT:
A join operation is costed by estimating the input/output operations (disk swaps) that will be required for retrieval of tuples from the outer and inner tables. A specific method is presented for estimating the number of input/output operations needed for given inner and outer data tables, which method models the retrieval of randomly arranged data from that table.

REFERENCES:
patent: 5598559 (1997-01-01), Chaudhuri
patent: 5706495 (1998-01-01), Chadha et al.
patent: 6032146 (2000-02-01), Chadha et al.
patent: 6272487 (2001-08-01), Beavin et al.
patent: 6516310 (2003-02-01), Paulley

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