DbUnit - Warning: AbstractTableMetaData

I am using DbUnit in the latest version 2.4.8 and I get many warnings in my Unit tests with this message:

WARN : org.dbunit.dataset.AbstractTableMetaData - 
Potential problem found: The configured data type factory 
    'class org.dbunit.dataset.datatype.DefaultDataTypeFactory' 
     might cause problems with the current database 'MySQL' (e.g. some datatypes may 
     not be supported properly). In rare cases you might see this message because the 
     list of supported database products is incomplete (list=[derby]). If so please 
     request a java-class u开发者_开发知识库pdate via the forums.If you are using your own 
     IDataTypeFactory extending DefaultDataTypeFactory, ensure that you override 
     getValidDbProducts() to specify the supported database products.

So I thought I add this (I use a MySQL database):

protected void setUpDatabaseConfig(DatabaseConfig config) {
    config.setProperty(DatabaseConfig.PROPERTY_DATATYPE_FACTORY, new MySqlDataTypeFactory());
}

But this does not help to avoid these warnings. What's wrong here?

Thank you in advance & Best Regards Tim.

I solved this with info from the dbunit faq. Just setting the data type factory property made the warning go away.

    Connection dbConn = template.getDataSource().getConnection();

    IDatabaseConnection connection = new DatabaseConnection(dbConn, "UTEST", false);

    DatabaseConfig dbConfig = connection.getConfig();

    // added this line to get rid of the warning
    dbConfig.setProperty(DatabaseConfig.PROPERTY_DATATYPE_FACTORY, new OracleDataTypeFactory());

With Spring-Boot you can use such configuration bean

@Configuration
public class DbUnitConfiguration {

@Autowired
private DataSource dataSource;

@Bean
public DatabaseDataSourceConnectionFactoryBean dbUnitDatabaseConnection() {
    DatabaseConfigBean bean = new DatabaseConfigBean();
    bean.setDatatypeFactory(new MySqlDataTypeFactory());

    DatabaseDataSourceConnectionFactoryBean dbConnectionFactory = new DatabaseDataSourceConnectionFactoryBean(dataSource);
    dbConnectionFactory.setDatabaseConfig(bean);
    return dbConnectionFactory;
    }
}

I know this is an old thread but all the answers here are more complicated than they need to be.

The simplest way to accomplish setting the factory on every connection acquisition is to supply an OperationListener and implement its connectionRetrieved method to do what you want. No overriding needed; the listener will be invoked every time an IDatabaseConnection is acquired.

I was using JTDS driver and MS SQL 2008. In my DBUntiTest class override the following method. The waring message disappeared.

@Override
protected void setUpDatabaseConfig(DatabaseConfig config) {
    config.setProperty(DatabaseConfig.PROPERTY_DATATYPE_FACTORY, new MsSqlDataTypeFactory());
}

@reassembler's answer is spot on. Just to add that I am testing against different database products, so I now set the DataType Factory according to the current connection:

private IDatabaseConnection getConnection(Connection jdbcConnection) throws Exception {
    String databaseProductName = jdbcConnection.getMetaData().getDatabaseProductName();

    DatabaseConnection databaseConnection = new DatabaseConnection(jdbcConnection);
    DatabaseConfig dbConfig = databaseConnection.getConfig();

    switch (databaseProductName) {
    case "HSQL Database Engine":
        dbConfig.setProperty(DatabaseConfig.PROPERTY_DATATYPE_FACTORY, new HsqldbDataTypeFactory());
        break;
    case "MySQL":
        dbConfig.setProperty(DatabaseConfig.PROPERTY_DATATYPE_FACTORY, new MySqlDataTypeFactory());
        break;
    default:
        log.warn("No matching database product found when setting DBUnit DATATYPE_FACTORY");
    }

    return databaseConnection; 
}

You can obviously add any additionaly databases to this list.

I am using Dbunit version 2.7.0. In my case, just setting the data type factory property in the @Test doesn't suffice. The warning continues when calling dbunit JdbcDatabaseTester.onsetup() method.

I solved the problem implementing a MyJdbcDatabaseTester that extends JdbdDatabaseTester, and overriding the method getConnection(), configuring the datatype factory property:

public class MyJdbcDatabaseTester extends JdbcDatabaseTester {

public MyJdbcDatabaseTester(String driverClass, String connectionUrl, String username,
                            String password )
        throws ClassNotFoundException {
    super( driverClass, connectionUrl, username, password );
}

@Override
public IDatabaseConnection getConnection() throws Exception {
    IDatabaseConnection result = super.getConnection();
    DatabaseConfig dbConfig = result.getConfig();
    //to supress warnings when accesing to database
    dbConfig.setProperty(DatabaseConfig.PROPERTY_DATATYPE_FACTORY, new MySqlDataTypeFactory());
    return result;
}

}

Then I use MyJcbdDatabaseTester instead of JdbcDatabaseTester in my tests