The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 1993
Filed:
Aug. 29, 1990
Applicant:
Inventors:
Harumi Minemura, Kanagawa, JP;
Shunichiro Nakamura, Kanagawa, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395600 ; 3642834 ; 3642824 ; 3642821 ; 3642592 ; 3642591 ; 364259 ; 3642303 ; 364230 ; 364D / ;
Abstract
A join processor for relational databases, which includes a main processor ( 1) for processing information; a main memory (2) connected to the main processor to store information; a plurality of auxiliary processors (3) controlled by the main processor; a plurality of auxiliary memories (4) each connected to the corresponding auxiliary processor; and a device for enabling said auxiliary processors to perform in parallel dividing and storing relations of relational databases in the auxiliary memories in units of record and extracting from the auxiliary memories and sorting join fields of the relations to be joined.