Method and apparatus for performing a join query in a database s

Details Method and apparatus for performing a join query in a database s Method and apparatus for performing a join query in a database s

1997-04-07

1999-11-16

Lintz, Paul R.

Data processing: database and file management or data structures

Database design

Data structure types

707 2, 707 5, G06F 1730

Patent

active

059874538

ABSTRACT:
A computer implemented method for generating a response to a join. Two tables are divided into fragments. A join fragment map identifies, for each respective fragment from the first table, the fragments from the second table which contain a record that satisfies the join predicate with a record from the respective fragment from the first table. The map is used to eliminate fragments which cannot satisfy the join predicate.

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patent: 5604892 (1997-02-01), Nuttall et al.
patent: 5668994 (1997-09-01), Swagerman
C.J. Date, Introduction to Database Systems, Jan. 1990, pp. 149-153, 623-624.

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