Methods for establishing and inquiring index of distributed column storage database, device and system thereof

A column storage and database technology, applied in the field of index establishment of distributed column storage database, data query method and corresponding device and system, can solve the problem that other column fields cannot be quickly and efficiently query, and achieve the effect of fast and efficient index query

Active Publication Date: 2010-06-09
CHINA MOBILE SUZHOU SOFTWARE TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0023] The present invention provides a distributed column storage database index establishment method, query method, device and system to solve the pro

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  • Methods for establishing and inquiring index of distributed column storage database, device and system thereof
  • Methods for establishing and inquiring index of distributed column storage database, device and system thereof
  • Methods for establishing and inquiring index of distributed column storage database, device and system thereof

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Embodiment Construction

[0056] An embodiment of the present invention provides a distributed column storage database index establishment method, the implementation process is as follows figure 2 shown, including:

[0057] Step S201, obtaining column fields in the distributed column storage database.

[0058] Step S202, generating a column index file with the obtained column field as a key, and the column index file includes a mapping relationship between the value of the column field in the distributed column storage database and the corresponding Row field value.

[0059] In the step S202, a corresponding column index file may be generated for each acquired column field (or column family).

[0060] In practical applications, in order to facilitate user queries, theoretically, a corresponding column index file can be generated for each column field in the distributed column storage database except the Row field. Of course, if some column fields are basically of no query value, and the field is har...

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Abstract

The invention discloses methods for establishing and inquiring index of a distributed column storage database, a device and a system thereof. The method for establishing index of a distributed column storage database comprises the steps of obtaining the column fields in the distributed column storage database to generate a column index file with the column fields as keywords, wherein the column index file contains the mapping relation between the values of the column fields in the distributed column storage database and the values of the corresponding Row fields; storing the column index file into the index directory corresponding to the column fields in the distributed column storage database. The method for inquiring index is implemented by matching corresponding index files to obtain corresponding values of Row fields when a client launches an inquiry request with the column fields as inquiry condition and result. By adopting the invention, fast inquiry of other column fields except for the Row fields can be realized in the prior distributed column storage database.

Description

technical field [0001] The present invention relates to a distributed column storage database, in particular to a method for establishing an index of a distributed column storage database, a data query method, and a corresponding device and system. Background technique [0002] Distributed column storage database is an excellent distributed solution suitable for fast query. While providing massive data storage, it can also effectively improve the query speed of data. [0003] The characteristics of a distributed column storage database are: there must be a Row field in the data table, and the Row field is a keyword, that is, it cannot be repeated, and it is sorted. If the original table has N column fields, the entire table is stored in (N-1) tables in the distributed column storage database; that is, except for the Row field, a corresponding table is stored for the remaining column fields. [0004] Examples are as follows: [0005] Table 1: GNTABLE [0006] Row ...

Claims

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Application Information

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IPC IPC(8): G06F17/30
CPCG06F17/30315G06F17/30321G06F16/2228G06F16/221
Inventor 徐萌钱岭罗治国郭磊涛赵鹏
Owner CHINA MOBILE SUZHOU SOFTWARE TECH CO LTD
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