公开(公告)号：US20170116280A1

公开(公告)日：2017-04-27

申请号：US15267759

申请日：2016-09-16

Applicant: Oracle International Corporation

Inventor： Kam Shergill, JR. ,  Ankita Kumar ,  Himanshu Chatterjee ,  Vineet Marwah ,  Srinivas Vemuri

IPC: G06F17/30

CPC classification number: G06F16/2343 ,  G06F16/2272

Abstract: A method and apparatus for compression units in an index block is provided. A particular leaf block of a database index for a table is generated. The particular leaf block corresponds to a particular range of key values. A compression scheme is determined for a plurality of index entries with key values within the particular range. A compression unit that includes a plurality of compressed index entries is generated by applying the compression scheme to the plurality of index entries. Compression metadata describing the compression scheme is generated. The compression unit and the compression metadata is stored in the particular leaf block. In response to a request, at least a portion of the compression unit is decompressed to access one or more index entries.