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热词
    • 5. 发明授权
    • Technique for compressing columns of data
    • 压缩数据列的技术
    • US09195695B2
    • 2015-11-24
    • US11900931
    • 2007-09-13
    • John YatesMichael SporerSharon Miller
    • John YatesMichael SporerSharon Miller
    • G06F7/00G06F17/30
    • G06F17/30321G06F17/30153G06F17/30371
    • An approach for providing compression of a database table that uses a compiled table algorithm (CTA) that provides leverage. Data within any given column in adjacent rows is often the same as or closely related to its neighbors. Rather than storing data in each column of each row as a specific integer, floating point, or character data value, a field reconstruction instruction is stored that when executed by a decompression engine can reconstruct the data value. The field reconstruction instruction may be bit granular and may depend upon past history given that the data compression engine may preserve state as row data is streamed off a storage device.
    • 提供使用提供杠杆的编译表算法(CTA)的数据库表的压缩的方法。 相邻行中任何给定列中的数据通常与其邻居相同或密切相关。 不是将每行的每列中的数据存储为特定整数,浮点或字符数据值,而是存储一个字段重构指令,当被解压缩引擎执行时可以重构数据值。 场重建指令可以是位细粒度的,并且可以依赖于过去的历史,因为数据压缩引擎可以在行数据从存储设备流传输时保留状态。