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Single-table multi-column sequence storage method for column database

A database and data table technology, applied in the field of database storage, to achieve the effect of enhancing performance and increasing flexibility

Active Publication Date: 2012-06-27
北京人大金仓信息技术股份有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The traditional row-based database technology has a technical bottleneck

Method used

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  • Single-table multi-column sequence storage method for column database
  • Single-table multi-column sequence storage method for column database
  • Single-table multi-column sequence storage method for column database

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Embodiment Construction

[0034] The present invention uses a logical data model of a relational database: each relation (relation) is a two-dimensional table (table), consisting of rows (tuples, also called tuples) and columns (attributes, also called fields). On this basis, the present invention implements a logical data model using a physical organization based on column sets. The following first introduces the specific meaning of "column set".

[0035] Column set: Each column set belongs to a relationship. Logically, the column set is a vertical subset of its belonging relationship; physically, it contains one or more columns of this relationship and has the same number of rows as the belonging relationship. If the relationship that the column set belongs to is a many-to-one relationship with another relationship, the column set can also contain the columns in the other relationship.

[0036] Column sets can contain the same column repeatedly, or there can be no duplicate columns. In other words,...

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Abstract

The invention discloses a single-table multi-column sequence storage method for a column database. The column database comprises a plurality of data tables formed by rows and columns, wherein the data tables are divided into a plurality of column sets, and the column set comprises one or more columns; and a union set of the column sets forms the data table, and a connection index is established between every two column sets and records the one-to-one corresponding relationship of storage positions of the columns of the same tuple belonging to the data table in the two column sets between which the connection index is established. The single-table multi-column sequence storage method provided by the invention can improve the query efficiency of the column database, and reduces the storage space.

Description

technical field [0001] The invention relates to a database storage method, in particular to a single-table multi-column sequence storage method for column databases, and belongs to the technical field of database storage. Background technique [0002] A relational database is a software system for storing and processing structured data. Its data is divided into two levels: one is logical data, which is composed of data tables, records, etc.; the other is physical data, which represents how the database Store logical data. There are two ways to realize the physical data of the database: one is based on row storage, and the other is based on column storage. [0003] For the implementation method based on row storage, it stores the entire record of logical data in the data block. In order to improve the query speed, it is necessary to establish B+ tree and other types of indexes for some columns; for the implementation method based on column storage, logic The records in the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 杨尚王鸿翔冯玉李祥凯冷建全
Owner 北京人大金仓信息技术股份有限公司
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