Bug 152443 Support boolean type in data set
Support boolean type in data set. It'll cause some data transform issue with absence of boolean type.
data/org.eclipse.birt.report.data.oda.jdbc/src/org/eclipse/birt/report/data/oda/jdbc/Statement.java
/**
	 * assertNull(Object o)
	 * 
	 * @param o
	 *            the object that need to be tested null or not. if null, throw
	 *            exception
	 */
	private void assertNotNull( Object o ) throws OdaException
	{
		if ( o == null )
		{
			throw new JDBCException( ResourceConstants.DRIVER_NO_STATEMENT,
					ResourceConstants.ERROR_NO_STATEMENT );
		}
	}
	/**
	 * 
	 * Constructor Statement(java.sql.Connection connection) use JDBC's
	 * Connection to construct it.
	 *  
	 */
	public Statement( java.sql.Connection connection ) throws OdaException
	{
		if ( connection != null )
		{
			
			this.preStat = null;
			this.conn = connection;
			maxrows = -1;
		}