Create a data source pointing to an existing database, using the JDBC provider that you defined. Resources > JDBC Providers > JDBC_provider > Data Sources >New.
The data source should be non-JTA, for example, non-XA enabled. Note the JNDI
name of the data source.
Verify that the correct database is listed for the value of the databaseName property under Data Sources >datasource_name> Custom Properties.
If necessary, contact your database administrator to verify the correct database name.