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    • 6. 发明公开
    • THIN DATABASE INDEXING
    • EFFIZIENTE DATENBANKINDIZIERUNG
    • EP3036663A1
    • 2016-06-29
    • EP14761745.0
    • 2014-08-20
    • Pivotal Software Inc.
    • BRAND, Michael
    • G06F17/30
    • G06F17/30321
    • Methods, systems, and apparatus, including computer programs encoded on computer storage media, for indexing column values of a database table. One of the methods includes receiving a database query requesting one or more rows of a database table having N rows, each row having an encoded column value, wherein the encoded column values are between 1 and N inclusive, wherein each distinct encoded column value occurs in the column exactly once, wherein each encoded column value represents a corresponding original column value, and wherein the query specifies a first original column value. The first original column value is mapped to a first row number identifying a first row. A row is identified as satisfying the query by chaining through the encoded column values in the table from the first row to identify subsequent rows until a row having an encoded column value matching the first row number is reached.
    • 方法,系统和装置,包括在计算机存储介质上编码的计算机程序,用于索引数据库表的列值。 方法之一包括接收请求数据库表的一行或多行的数据库查询,其具有N行,每行具有编码的列值,其中编码的列值在1和N之间,其中每个不同的编码列值出现在 所述列恰好一次,其中每个编码列值表示对应的原始列值,并且其中所述查询指定第一原始列值。 第一个原始列值映射到标识第一行的第一行号。 通过链接来自第一行的表中的编码列值来识别行来满足查询,以识别后续行,直到达到具有与第一行号匹配的编码列值的行。