Method and system for importing entity-relationship model data based on dependency relationships

A technology of dependency and model data, applied in the database field, it can solve the problems of time-consuming, unable to import immediately, and consuming large storage resources, and achieve the effect of saving storage resources.

Active Publication Date: 2014-04-09
IBM CORP
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Problems solved by technology

The obvious problem is: when importing the E-R data file exported from one system to another system, if the E-R data file is very large, in order to prevent errors in the relationship between entities after importing, it must be imported according to the system to be imported. Reorganizing the data structure of the E-R data file is very time-consuming and consumes a lot of storage resources to store entities that are read from the E-R data file but cannot be imported immediately

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  • Method and system for importing entity-relationship model data based on dependency relationships
  • Method and system for importing entity-relationship model data based on dependency relationships
  • Method and system for importing entity-relationship model data based on dependency relationships

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Embodiment Construction

[0017] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0018] Those skilled in the art know that the present invention can be implemented as a system, method or computer program product. Therefore, the present disclosure can be specifically implemented in the following forms, that is: it can be complete hardware, it can also be complete software (including firmware, resident software, microcode, etc.), and it can also be a combination of hardware and software. Called a "circuit", "module" or "s...

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Abstract

The invention relates to the technical field of databases, in particular to a method and a system for importing E-R (entity-relationship) model data by utilizing dependency relationships in an E-R model data pattern. The method for importing the E-R model data includes: receiving an exported E-R model data file and the E-R model data pattern; determining a dependency relationship type of each entity in the data file according to the data pattern, wherein the dependency relationship types include at least one of irrelevant type, weakly relevant type or strongly relevant type; according to the determined dependency relationship type, correspondingly importing each entity in the E-R model data file.

Description

technical field [0001] The invention relates to the technical field of databases. More specifically, the present invention relates to a method and system for importing E-R model data by utilizing dependency information in the E-R model data schema. Background technique [0002] An Entity-Relationship (E-R) model is a semantic model that is useful in mapping real-world meanings and interrelationships to conceptual schemas. The E-R model uses three basic concepts: entity set, relationship set and attribute. [0003] Generally speaking, there are three possible situations for the association relationship (or "dependency relationship") between entities in the E-R model data. One is a strong association relationship, which means that an entity type is linked to another entity N (N>=1) instances of the type. In other words, an entity has a property that has another entity type with at least 1 of that property. For example, the entity "student" has the attribute "name", and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F17/30292G06F17/303G06F16/288G06F16/214G06F16/2282G06F16/23G06F16/254
Inventor 刘昕鹏石磊万昊
Owner IBM CORP
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