Android SQLite ORDER BY无法工作

我有一个非常基本的情况：

我有一张大约5千行的桌子：

CREATE TABLE "words" ("id" INTEGER PRIMARY KEY  AUTOINCREMENT  NOT NULL , "name" TEXT NOT NULL , "def" TEXT NOT NULL, "rand" INTEGER)

我会使用updatewords SET rand=random定期更新它

在android中，当我使用rawQuery创建光标时，使用以下命令：

SELECT w.id, w.name, w.def, w.rand FROM words w ORDER BY w.rand ASC;

while(cursor.moveToNext()) {
    ...
    Log.i("Test", cursor.getInt(3));
    ...
}

返回的游标没有按正确的顺序迭代。例如，它将按以下顺序输出带有rand值的列：

-1298882092
-2138143484
-1115732861
118839193
...

有人知道这里发生了什么吗？这不管用吗？如果我在SQLItemManager中运行完全相同的查询，它将以正确的顺序返回结果，因此这似乎是特定于android/游标的

更新：

以下是android中的代码，我尝试了多种方法：

尝试1：

Cursor cursor = db.rawQuery("SELECT w.id, w.name, w.def, w.rand FROM words w ORDER BY w.rand ASC", new String[]{});

尝试2：

Cursor cursor = db.query("words", new String[]{"id", "name", "def", "rand"},
            null, null, null, null, "rand ASC");

在这两种情况下，我的迭代如下所示：

SELECT w.id, w.name, w.def, w.rand FROM words w ORDER BY w.rand ASC;

while(cursor.moveToNext()) {
    ...
    Log.i("Test", cursor.getInt(3));
    ...
}

---

我解决了，只是一个简单的疏忽。random函数返回的值可以大于java int数据类型。这产生了溢出。切换到getLong，一切正常。光标一直在正确迭代。

我对android光标、rawquery和GroupBy有问题。结果没有公布

这是表格：

public static final String I_ID = "iid";
public static final String I_QID = "qid";
public static final String I_STATUS = "status";
public static final String I_PDATE = "pub_date";
public static final String I_TYPE = "tipo";
public static final String I_TITLE = "titolo";
public static final String I_LINK = "link";
public static final String I_QR = "qrcode";
public static final String I_DESC = "descrizione";

private static final String C_ITEM_T = 
        "CREATE TABLE \""+T_ITEM+"\" ("+
        "\""+I_ID+"\" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,"+
        "\""+I_QID+"\" INTEGER NOT NULL REFERENCES "+T_QUERY+"("+Q_ID+") ,"+
        "\""+I_STATUS+"\" INTEGER NOT NULL,"+
        "\""+I_PDATE+"\" TEXT NOT NULL,"+
        "\""+I_TYPE+"\" TEXT NOT NULL,"+
        "\""+I_TITLE+"\" TEXT NOT NULL,"+
        "\""+I_LINK+"\" TEXT UNIQUE NOT NULL,"+
        "\""+I_QR+"\" TEXT UNIQUE NOT NULL,"+
        "\""+I_DESC+"\" TEXT"+
        ");";

public static final String A_ID = "aid";
public static final String A_IID = "iid";
public static final String A_SIZE = "grandezza";
public static final String A_DURATION = "durata";
public static final String A_CHANNELS = "canali";
public static final String A_RATE = "sampleRate";
public static final String A_TORRENT = "torrent";
public static final String A_DOWNLOAD = "download";
public static final String A_LICENSE_URL = "licenza_url";
public static final String A_TAGS = "tags";
public static final String A_CREATOR = "creatore";

private static final String C_ATTR_T = 
        "CREATE TABLE \""+T_ATTR+"\" ("+
        "\""+A_ID+"\" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,"+
        "\""+A_IID+"\" INTEGER NOT NULL REFERENCES "+T_ITEM+"("+I_ID+") ,"+
        "\""+A_SIZE+"\" LONG NOT NULL,"+
        "\""+A_DURATION+"\" LONG NOT NULL,"+
        "\""+A_CHANNELS+"\" TEXT NOT NULL,"+
        "\""+A_RATE+"\" TEXT NOT NULL,"+
        "\""+A_TORRENT+"\" TEXT NOT NULL,"+
        "\""+A_DOWNLOAD+"\" TEXT NOT NULL,"+
        "\""+A_LICENSE_URL+"\"TEXT,"+
        "\""+A_TAGS+"\" TEXT,"+
        "\""+A_CREATOR+"\" TEXT,"+
        "UNIQUE ("+A_ID+","+A_IID+")"+
        ");";

这是我的问题：

public static final String FILL_GRID = "SELECT * "+
        "FROM "+ Db.T_ITEM + " i " +
        "LEFT OUTER JOIN "+Db.T_ATTR+" a ON ( i."+Db.I_ID+"=a."+Db.A_IID+ ")"+ 
        " WHERE i."+Db.I_QID+" = ? AND i."+Db.I_STATUS+" <> "+Db.STATUS_DELETED +
                    " GROUP BY ? ";

其中，我确定qid是一个整数，且顺序为i.titolo ASC或DESC

唯一对我有效的解决方法是修改查询，在rawquery调用方法中移动group by子句：

public static final String FILL_GRID = "SELECT * "+
        "FROM "+ Db.T_ITEM + " i " +
        "LEFT OUTER JOIN "+Db.T_ATTR+" a ON ( i."+Db.I_ID+"=a."+Db.A_IID+ ")"+ 
        " WHERE i."+Db.I_QID+" = ? AND i."+Db.I_STATUS+" <> "+Db.STATUS_DELETED;

Cursor c = db.rawQuery(FILL_GRID + " ORDER BY " + order, new String[]{String.valueOf(qid)});

---

不在Android上，但它似乎在这里工作：是的，它在SqlItemManager中也工作，所以我认为它是特定于Android的。实际案例中还有5k行和rand列上的索引。你能发布Android代码吗？在问题中添加了代码。你多久更新一次rand列？你确定这不是问题的根源吗？很好地解决了这个问题。静默整数截断错误可能很难调试