Pass-through architecture via hash techniques to remove duplicat

Details Pass-through architecture via hash techniques to remove duplicat Pass-through architecture via hash techniques to remove duplicat

1997-09-10

2000-06-27

Black, Thomas G.

Data processing: database and file management or data structures

Database design

Data structure types

707 3, 707 2, 707 4, G06F 1730

Patent

active

060818050

ABSTRACT:
A method and system for removing duplicate query results in a database system comprising a plurality of data sources. The method and system includes issuing a query from a user to a first data source. In response to receiving a first query result from the data source, a first hash index is computed for the first query result and the first query result is passed on to the user. The method and system further includes receiving a second query result and computing a second hash index for the second query result. The first hash index is then compared with the second hash index to cheek for a hash collision. If the first, and second hash indexes match, the first data source is queried for data corresponding to the second query result. And if the first data source contains the data, then the second query result is considered a duplicate and is discarded.

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