Applying distinct hash-join distributions of operators to both even and uneven database records
US5873074A · kind A · utility
47Cited by
8References
41Claims
0Family size
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Key dates
| Filing date | Apr 18, 1997 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Apr 18, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99938
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer-based method and system of processing records read respectively from first and second related tables of a database includes determining whether data contained in the records read from the first or second tables is unevenly distributed. Records corresponding to evenly distributed data are searched for matches using a first set of instances of the hash-join operator, and records corresponding to data which is unevenly distributed are searched for matches using a second set of instances of a hash-join operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.