12.2. Foreign Table

A FOREIGN table is a table that is defined on a physical model that represents a real relational table in source databases like Oracle, SQLServer etc. For relational databases, JBoss Data Virtualization has the capability to automatically retrieve the database schema information upon the deployment of the VDB, if one like to auto import the existing schema. However, the user can use below FOREIGN table semantics, when they would like to explicitly define tables on PHYSICAL models or represent non-relational data as relational data in custom translators.

Example 12.2. Example:Create Foreign Table(Created on PHYSICAL model)

CREATE FOREIGN TABLE Customer (id integer PRIMARY KEY, firstname varchar(25), lastname varchar(25),  dob timestamp);

CREATE FOREIGN TABLE Order (id integer PRIMARY KEY, customerid integer, saledate date, amount decimal(25,4), CONSTRAINT fk FOREGIN KEY(customerid) REFERENCES Customer(id));

CREATE FOREIGN TABLE Customer (id integer PRIMARY KEY, firstname varchar(25), lastname varchar(25),  dob timestamp);

CREATE FOREIGN TABLE Order (id integer PRIMARY KEY, customerid integer, saledate date, amount decimal(25,4), CONSTRAINT fk FOREGIN KEY(customerid) REFERENCES Customer(id));

Copy to Clipboard

Toggle word wrap

Note

See "create table" in Section A.7, “Productions”.

返回顶部

此内容没有您所选择的语言版本。

12.2. Foreign Table

学习

尝试、购买和销售

社区

关于红帽文档

让开源更具包容性

關於紅帽

Theme

Red Hat legal and privacy links

Red Hat legal and privacy links