Integrating databases
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United States of America Patent
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Feb 24, 2015
Grant Date -
Dec 11, 2008
app pub date -
Oct 29, 2007
filing date -
Oct 30, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A system for integrating databases comprises a first virtual table, a second virtual table, a common table, a list, a generating section, and a selecting section. The first virtual table corresponds to a first data. The second virtual table corresponds to a second data. The common table is associated with the first and second virtual tables. The list indicates information about associations between the first and second virtual tables and the common table. The generating section generates two or more access plans from a database query on the common table. The two or more access plans involve at least one of the first and second virtual tables in accordance with the list. The selecting section selects 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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