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Many Hibernate use cases assume a data source has the ability (with proper user permissions) to process Data Definition Language (DDL) statements like CREATE TABLE and DROP TABLE as well as Data Manipulation Language (DML) statements like SELECT, UPDATE, INSERT and DELETE. Teiid can handle a broad range of DML, but does not support directly support DDL against a particular source.
Sequence and Identity generation are not supported. Identifier generation based upon table values, such as the hilo generator, require that the identifier table(s) be exposed through Teiid. The GUID identifier generation strategy is directly supported.
For the most part, interacting with Teiid VDBs (Virtual Databases) from Hibernate is no
different from working with any other type of data source.
First you must place Teiid JDBC API client JAR file and Teiid's hibernate dialect JAR in Hibernate’s classpath.
These files can be found in <jboss-install>/server/<profile>/lib directory.
teiid-7.6-client.jar
teiid-hibernate-dialect-7.6.jar
These JAR files have the org.teiid.dialect.TeiidDialect and org.teiid.jdbc.TeiidDriver and
org.teiid.jdbc.TeiidDataSource classes.
You then configure Hibernate (via hibernate.cfg.xml) as follows:
Specify the Teiid driver class in the "connection.driver_class" property:
<property name="connection.driver_class"> org.teiid.jdbc.TeiidDriver </property>
Specify the URL for the VDB in the "connection.url" property (replacing terms in angle brackets with the appropriate values):
<property name="connection.url"> jdbc:teiid:<vdb-name>@mm://<host>:<port>;user=<user-name>;password=<password> </property>
Be sure to use a Section 1.4.3, “Local JDBC Connection” if Hibernate is in the same VM as the application server.
Specify the Teiid dialect class in the “dialect” property:
<property name="dialect"> org.teiid.dialect.TeiidDialect </property>
Alternatively, if you put your connection properties in hibernate.properties
instead of hibernate.cfg.xml, they would look like this:
hibernate.connection.driver_class=org.teiid.jdbc.TeiidDriver hibernate.connection.url=jdbc:teiid:<vdb-name>@mm://<host>:<port> hibernate.connection.username=<user-name> hibernate.connection.password=<password> hibernate.dialect=org.teiid.dialect.TeiidDialect
Note also that since your VDBs will likely contain multiple source and view models with identical table names, you will need to fully qualify table names specified in Hibernate mapping files:
<class name="<Class name>" table="<Source/view model name>.[<schema name>.]<Table name>"> ... </class>
Example 6.1. Example Mapping
<class name="org.teiid.example.Publisher" table="BOOKS.BOOKS.PUBLISHERS"> ... </class>