Bug 416703 Mongodb : Display correctly the Number data type
data/org.eclipse.birt.data.oda.mongodb/src/org/eclipse/birt/data/oda/mongodb/impl/MDbResultSet.java
Date dateValue = getDate( columnName );
	    if( dateValue == null )
	        return null;
        return new Time( dateValue.getTime() );
    }
	/*
	 * @see org.eclipse.datatools.connectivity.oda.IResultSet#getTimestamp(int)
	 */
	public Timestamp getTimestamp( int index ) throws OdaException
	{
        return getTimestamp( findFieldName(index) );
	}
	/*
	 * @see org.eclipse.datatools.connectivity.oda.IResultSet#getTimestamp(java.lang.String)
	 */
	public Timestamp getTimestamp( String columnName ) throws OdaException
	{
        Object columnValue = getFieldValue( columnName );
        columnValue = tryConvertToDataType( columnValue, Timestamp.class );
        if( columnValue instanceof Timestamp )
            return (Timestamp)columnValue;
        if( columnValue instanceof BSONTimestamp )
            return convertToSqlTimestamp( (BSONTimestamp)columnValue );
        if( columnValue instanceof List )
            return convertToSqlTimestamp( 
                    (BSONTimestamp)getFirstFieldValue( (List<?>)columnValue, BSONTimestamp.class, 
                            columnName ));
        
        if( columnValue != null && getLogger().isLoggable( Level.FINE ) )
            getLogger().fine(