Database instruction apparatus for determining a database record

Details Database instruction apparatus for determining a database record Database instruction apparatus for determining a database record

1975-06-19

1978-12-19

Chapnick, Melvin B.

Boots, shoes, and leggings

G06F 914, G06F 920, G06F 1300

Patent

active

041308670

ABSTRACT:
One of a series of hardware/firmware instructions for converting a general purpose digital computer into a database machine by adding the capability of handling data base records. The invention comprises a hardware/firmware implemented machine instruction apparatus which fetches a record descriptor containing a referenced data base record type from main memory. The record type of the record to be checked, which is pointed to by a base register, is also fetched from main memory, and a comparison of the fetched record descriptor and type is made. A condition code is set to indicate the result of the comparison.

REFERENCES:
patent: 3787813 (1974-01-01), Cole et al.
patent: 3900834 (1975-08-01), Casey et al.

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