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Apparatus and method for transparent access of foreign databases in a heterogeneous database system

  • US 6,226,649 B1
  • Filed: 09/03/1999
  • Issued: 05/01/2001
  • Est. Priority Date: 06/23/1997
  • Status: Expired due to Term
First Claim
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1. A method for processing a statement from a client, comprising the steps of:

  • receiving the statement at a local database system, said statement specifying a plurality of operations that need to be performed to execute the statement;

    identifying at least one of the operations specified by the statement to be performed by a foreign database system, wherein said at least one of the operations includes an access to metadata in a structure supported by the local database system and not supported by the foreign database system;

    generating a request for the foreign database system to perform said at least one of the operations based on the statement specifying said at least one operation, wherein the request includes an access to metadata in a structure supported by the foreign database system; and

    sending the request to the foreign database system to perform said at least one of the operations.

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