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SYSTEM, METHOD, AND PROGRAM PRODUCT FOR INTEGRATING DATABASES

  • US 20080306904A1
  • Filed: 10/29/2007
  • Published: 12/11/2008
  • Est. Priority Date: 10/30/2006
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a first virtual table corresponding to a first data;

    a second virtual table corresponding to a second data;

    a common table that is associated with the first and second virtual tables;

    a list with information about associations between the first and second virtual tables and the common table;

    a generating section for generating two or more access plans from a database query on the common table, the two or more access plans involving at least one of the first and second virtual tables in accordance with the list; and

    a selecting section for selecting one of the two or more access plans generated by the generating section to be used to execute the database query.

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