结果集不可更新[重复]

Question

我已阅读 stackoverflow（以及网络上的其他地方）上的所有“可更新”帖子，但无济于事。我的代码运行良好，然后它停止说结果集不可更新。这是我在 JDBC derby 数据库中使用的 4 个数据文件。这些文件都有密钥。我不知道还能去哪里看。我写了下面的测试代码来演示这个问题。

     private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {                                      
try {
    String uName = "guest";
    String uPass = "guest";
    String host = "jdbc:derby://127.0.0.1:1527/erTracker";
    Connection erTrackerCon = DriverManager.getConnection( host,uName,uPass );
   // erTrackerCon.setAutoCommit(true);
     milestonesStmt = erTrackerCon.createStatement( ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
    String SQL = "SELECT * FROM milestones order by milestoneID";
    rsMilestones = milestonesStmt.executeQuery( SQL ); 
    String a = "02";
    String b = "M";
    String c = "Move to prospect";
    erTrackerCon.setReadOnly(false);
    int concurrency = rsMilestones.getConcurrency();
    System.out.println("the answer is " + concurrency); // the answer is 1007
    rsMilestones.moveToInsertRow(); // error is: 'moveToInsertRow' not allowed because the ResultSet is not an updatable ResultSet. 
    rsMilestones.updateString("milestoneID", a);
    rsMilestones.updateString("milestoneType",b);
    rsMilestones.updateString("milestoneName", c);
    rsMilestones.insertRow( );  
   //String SQL =  "INSERT INTO milestones (milestoneid,milestonetype,milestongname) VALUES     ('02','M','move to pursue')";
   //rsMilestones = milestonesStmt.executeQuery( SQL );
}                                     
catch ( SQLException err ) {
   System.out.println( err.getMessage( ) );
   }
}

Answer 1

根据 Derby 文档（例如 here），您不能在可更新的结果集中使用 ORDER BY。