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Application portability and extensibility through database schema and query abstraction

  • US 20060010127A1
  • Filed: 09/14/2005
  • Published: 01/12/2006
  • Est. Priority Date: 02/26/2002
  • Status: Active Grant
First Claim
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1. A computer-implemented method of providing access to data having a particular schema, comprising:

  • in response to receiving an abstract query, accessing a data abstraction model which models the data having the particular schema and exposes the data to users in a manner that allows the users to compose queries on the basis of the data abstraction model without knowledge or regard for the particular schema;

    wherein the model comprises a plurality of logical field definitions, each of the definitions comprising a logical field name, at least one location attribute identifying a location of physical data corresponding to the logical field name, and a reference to an access method invoked to access the physical data in response to receiving the abstract query containing the logical field name;

    wherein at least one of the logical field names is different from a physical field name of the corresponding physical data as defined by the schema.

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