Systems and methods for redistributing data in a relational database
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United States of America Patent
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Sep 24, 2013
Grant Date -
Dec 6, 2012
app pub date -
Jun 1, 2011
filing date -
Jun 1, 2011
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Abstract
Systems and methods for redistributing data in a relational database are disclosed. In one embodiment, the database includes a plurality of rows of data distributed across a plurality of slices of a table in the database. The database system is configured to distribute the rows of data across the slices according to a first function based on one or more columns of the database. The database system monitors at least one database statistic indicative of variation in a distribution of the rows of data across the slices and detects a redistribution condition based on the at least one monitored database statistic. The database system is further configured to respond to the detected redistribution condition by redistributing the rows of data across the slices according to a second function based on a different number of columns than the first function.
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