Join processing system and method for joining relations based on

Details Join processing system and method for joining relations based on Join processing system and method for joining relations based on

1995-02-14

1997-03-18

Pan, Daniel H.

Boots, shoes, and leggings

364DIG1, 364DIG2, G06F 708, G06F 714, G06F 736, G06F 1204

Patent

active

056131429

ABSTRACT:
This invention provides a join processing system and method, which operates efficiently without a burden to a master processor, in a relational database on a multiprocessor. In a system which includes a master processor, multiple slave processors and disk drives, data is distributed and stored in the disk drives. Each of the slave processors retrieves a first sub-table and transfers the table to the master processor, and the master processor creates a first main table. Each of the slave processors retrieves the second data selectively with reference to the first main table, and creates a second sub-table. The master processor merges the second sub-tables, and creates a second main table. Then, a join processing of the first main table and the second main table is performed.

REFERENCES:
patent: 4774657 (1988-09-01), Anderson et al.
patent: 5193182 (1993-03-01), Bachman et al.
patent: 5210870 (1993-05-01), Baum et al.

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