Technology Cafe

Grails quick-start example is a neat way to start off with Grails.

It will show you how to connect to HSQLDB and gets a quick and elementary web app up and running in no time.

But soon, I wanted to get on with the “real” stuff- Oracle

These are the changes I did to connect with Oracle (and errors I encountered on the way).

But first the Version disclaimer

Groovy:1.6.2

Grails: 1.1

Oracle::9.2.0.6.0
A) Changed the DataSource.groovy as follows

dataSource {
pooled = true
driverClassName = “oracle.jdbc.driver.OracleDriver”
username = “user”
password = “password”
dialect=’org.hibernate.dialect.Oracle9Dialect’

}

environments {
development {
dataSource {
dbCreate = “create-drop” // one of ‘create’, ‘create-drop’,'update’
url = “jdbc:oracle:thin:@myservername:1521:mysid”
}
}
// Left test and Production as they were….

}
B) Dropped the oracle driver jar file in the lib folder under the grails- app folder

Bingo !!! That’s it !!!

I got only one error-  (see at the end of this post) And this maybe specific to Oracle 9i.

The fix was to add this line to the  data source.groovy

dialect=’org.hibernate.dialect.Oracle9Dialect’

(If you are using a higher version of Oracle- you may need to use a different Dialect)

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘dialectDetector’: Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is java.sql.SQLException: Unsupported feature
at java.security.AccessController.doPrivileged(Native Method)
… 24 more
Caused by: org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is java.sql.SQLException: Unsupported feature
… 25 more
Caused by: java.sql.SQLException: Unsupported feature
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:269)
at oracle.jdbc.dbaccess.DBError.throwUnsupportedFeatureSqlException(DBError.java:689)
at oracle.jdbc.OracleDatabaseMetaData.getDatabaseMajorVersion(OracleDatabaseMetaData.java:4442)
… 25 more
2009-04-27 10:57:39,450 [main] ERROR mortbay.log  – Failed startup of context