Querying past versions of data in a distributed database
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United States of America Patent
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Jun 23, 2009
Grant Date -
Mar 10, 2005
app pub date -
Jun 10, 2004
filing date -
Sep 6, 2003
priority date (Note) -
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Abstract
Past versions of data in a distributed database system comprising multiple databases and associated database servers are queried using temporal database access mechanisms, where a request for data in a past state from a “remote” database can be received at a “local” database server and relevant portions of the request are passed to the remote server for processing. The processing performed by the remote server includes returning the requested data in the specified past state to the local server, or at least with enough information to reconstruct the data into the past state.
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