Supporting transient snapshot with coordinated/uncoordinated commit protocol
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United States of America Patent
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Sep 4, 2018
Grant Date -
Apr 14, 2016
app pub date -
Jun 24, 2015
filing date -
Oct 8, 2014
priority date (Note) -
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Abstract
Methods and a system are provided. A method includes maintaining an in-page log for records in each of a plurality of data pages of a multi-version database. The method further includes adding record update information to the in-page log when a corresponding one of the records is deleted or updated. The method also includes consulting the in-page log for a recently updated one of the records or a recently deleted one of the records to determine a record status thereof. The method additionally includes spilling, by a processor-based overflow manager, to overflow pages when the in-page log is full. The data pages include any of row-oriented data pages and column-oriented data pages.
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