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Method and apparatus for using a hash-partitioned index to access a table that is not partitioned or partitioned independently of the hash partitioned index
Method and apparatus for using a hash-partitioned index to access a table that is not partitioned or partitioned independently of the hash partitioned index
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机译:使用哈希分区索引来访问未分区或未独立于哈希分区索引进行分区的表的方法和装置
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摘要
One embodiment of the present invention provides a system that uses an index that is hash-partitioned to access a table that is not hash-partitioned. During system operation, the database receives a request to perform an operation involving a table in the database. If performing the operation involves looking up a key in the hash-partitioned index, the database applies a hash function to the key to identify a unique partition within the hash-partitioned index for the key, and uses the key to perform a lookup in the identified partition to identify zero or more rows of the table that match the key.
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