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Aggregate predicates and search in a database management system

  • US 6,947,934 B1
  • Filed: 02/16/2000
  • Issued: 09/20/2005
  • Est. Priority Date: 02/16/2000
  • Status: Expired due to Term
First Claim
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1. A method of executing a statement in a computer to manipulate data in a data store connected to the computer, the method comprising:

  • receiving a statement having a rank operator for specifying an aggregate predicate; and

    when evaluating the statement, processing the aggregate predicate to produce a rank-sorted set of tuples by performing an extended sort on an input stream of tuples using a rank, a group-by list and a scoring expression.

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