Data base processing apparatus using relational operation proces

Details Data base processing apparatus using relational operation proces Data base processing apparatus using relational operation proces

1989-09-28

1993-09-21

Shaw, Gareth D.

Boots, shoes, and leggings

364DIG1, 3642821, 3642834, G06F 938

Patent

active

052476650

ABSTRACT:
A relational operation processing unit is supplied with addresses of a main memory at which file data (including a file format, a block length, a record length, and the like) of an operation target file read out from a magnetic disk unit in the main memory, a type of operation for the file, and operation results are stored. A relational operation processing unit extracts key fields of records contained in the operation target file, and adds the addresses of the main memory at which the records having the key fields are stored, as identifiers to respective key data. An operation is performed using a pair of key data and an identifier as a processing unit. The identifiers are extracted from a data string obtained as results of an operation and are written in the main memory. The CPU rearranges the corresponding records in the order of the stored identifiers.

REFERENCES:
patent: 4514826 (1985-04-01), Iwata et al.
patent: 4543630 (1985-09-01), Neches
patent: 4644471 (1987-02-01), Kojima et al.

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