METHOD AND DEVICE FOR DATA QUERY

Title:

METHOD AND DEVICE FOR DATA QUERY

Document Type and Number:

WIPO Patent Application WO/2018/218504

Kind Code:

A1

Abstract:

A method and device for data query. The method comprises: acquiring a query statement, the query statement being used for querying N layers of data in a data hierarchical structure of a data set to acquire target data to be queried, the data hierarchical structure being a hierarchical structure in which the data in the data set is stored, the data set being stored in K files according to a descending order of hierarchy in the data hierarchical structure, the K files comprising a first file and a second file, the first file being the earliest created file among the K files, and the second file being the latest created file among the K files, where N and K are positive integers greater than 1 (310); and if the query statement satisfies preset criteria, then querying the K files according to the querying order from the second file to the first file, the preset criteria comprising a filtering criterion in the first sub-statement used for querying the data set being null, a filtering criterion in the second sub-statement used for querying the data set not being null, the first sub-statement being used for querying top layer data in the N layers of data, and the second sub-statement being used for querying bottom layer data in the N layers of data (320). The method favors increased efficiency of data query.

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Inventors:

GAO ZIJUAN (CN)
WANG TIEYING (CN)

Application Number:

PCT/CN2017/086600

Publication Date:

December 06, 2018

Filing Date:

May 31, 2017

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Assignee:

HUAWEI TECH CO LTD (CN)

International Classes:

G06F17/30

Foreign References:

CN103294807A	2013-09-11
CN104123288A	2014-10-29
CN104216891A	2014-12-17
CN103198141A	2013-07-10
CN105528367A	2016-04-27
US20070239691A1	2007-10-11

Attorney, Agent or Firm:

LONGSUN LEAD IP LTD. (CN)

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