公开(公告)号：US08782023B1

公开(公告)日：2014-07-15

申请号：US13359278

申请日：2012-01-26

申请人： Monica Chawathe ,  Namit Sikka ,  Ashish Gupta ,  Robert C. Keller ,  Fenglin Liao ,  Haifeng Jiang

发明人： Monica Chawathe ,  Namit Sikka ,  Ashish Gupta ,  Robert C. Keller ,  Fenglin Liao ,  Haifeng Jiang

IPC分类号： G06F17/30

CPC分类号： G06F17/30309

摘要： A device may store information associated with a group of items in a database. The information associated with a particular item may include a group of versions of a particular attribute. A particular version of the particular attribute may include a value associated with the particular attribute and a timestamp. The device may receive a query that specifies a time; determine that the query is associated with the particular item; and determine, based on the specified time, which version of the particular attribute is associated with the query. The device may determine which version of the particular attribute is associated with the query by identifying, based on the timestamps associated with the versions of the particular attribute, a version of the particular attribute that is a newest version, of the versions of the particular attribute that are associated with timestamps that are before or concurrent with the specified time.

摘要翻译： 设备可以将与一组项目相关联的信息存储在数据库中。 与特定项目相关联的信息可以包括特定属性的一组版本。 特定属性的特定版本可以包括与特定属性和时间戳相关联的值。 设备可能会收到指定时间的查询; 确定查询与特定项目相关联; 并且基于指定的时间确定特定属性的哪个版本与查询相关联。 设备可以通过基于与特定属性的版本相关联的时间戳来识别特定属性的特定属性的版本，特定属性的版本的特定属性的版本，来确定特定属性的哪个版本与查询相关联 它们与指定时间之前或之后的时间戳相关联。