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Database management system and query operation therefor, including processing plural database operation requests based on key range of hash code

  • US 6,256,621 B1
  • Filed: 11/03/1999
  • Issued: 07/03/2001
  • Est. Priority Date: 01/20/1993
  • Status: Expired due to Term
First Claim
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1. A query operation method, in a database management system having a plurality of database processors and a plurality of functions designating database operation requests to said plurality of database processors, said method comprising the steps of:

  • analyzing an inputted query request;

    generating a plurality of database operation requests corresponding to the analyzed query request, based upon a key range of a hash code obtained by a hash function which is assigned in advance to a database operation key;

    sending the generated plurality of database operation requests to at least one of said database processors; and

    independently executing database operations in the database processors in response to the database operation requests.

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