java Android SQLite:约束失败错误代码19

Question

我已经执行了以下sql：

更新记录，列明付款=4，其中列明付款=4

记录的out_付款定义为整数，并引用付款（id）

我可以确保4是付款表的ID之一

但我还是得到了失败

07-31 10:20:36.014: ERROR/Database(19085): Error updating out_payment=4 using UPDATE record_table SET out_payment=? WHERE out_payment = 4
07-31 10:20:45.964: ERROR/AndroidRuntime(19085): FATAL EXCEPTION: main
07-31 10:20:45.964: ERROR/AndroidRuntime(19085): 安卓.database.sqlite.SQLiteConstraintException:   error code 19: constraint failed

代码如下：

values.clear();
values.put(RecordSchema.ID_OUT_PAYMENT, oldid);
selection = RecordSchema.ID_OUT_PAYMENT + " = " + oldid + "";
this.db.update(Table.RECORD, values, selection, null);

模式如下所示：

db.execSQL("CREATE TABLE IF NOT EXISTS " + TABLE.RECORD
+ " (" + RecordSchema.ID + " INTEGER PRIMARY KEY"
+ "," + RecordSchema.AMOUNT + " TEXT NOT NULL"
+ "," + RecordSchema.ID_CATEGORY + " INTEGER NOT NULL"
+ "," + RecordSchema.ID_SUBCATEGORY + " INTEGER"
+ "," + RecordSchema.DATE + " DATE NOT NULL"
+ "," + RecordSchema.ID_IN_PAYMENT + " INTEGER"
+ "," + RecordSchema.ID_OUT_PAYMENT + " INTEGER"

+ ",FOREIGN KEY(" + RecordSchema.ID_CATEGORY + ") REFERENCES " 
+ IsAiZanTable.CATEGORY + "(" + CategorySchema.ID + ") ON UPDATE CASCADE"

+ ",FOREIGN KEY(" + RecordSchema.ID_SUBCATEGORY + ") REFERENCES "
+ IsAiZanTable.SUBCATEGORY + "(" + SubcategorySchema.ID + ") ON UPDATE CASCADE"

+ ",FOREIGN KEY(" + RecordSchema.ID_IN_PAYMENT + ") REFERENCES "
+ IsAiZanTable.PAYMENT + "(" + PaymentSchema.ID + ") ON UPDATE CASCADE"

+ ",FOREIGN KEY(" + RecordSchema.ID_OUT_PAYMENT + ") REFERENCES "
+ IsAiZanTable.PAYMENT + "(" + PaymentSchema.ID + ") ON UPDATE CASCADE"
                + ");");

db.execSQL("CREATE TABLE IF NOT EXISTS " +Table.PAYMENT
+ " (" + PaymentSchema.ID + " INTEGER PRIMARY KEY"
+ "," + PaymentSchema.KIND + " INTEGER NOT NULL"
+ "," + PaymentSchema.NAME + " TEXT NOT NULL UNIQUE"
+ "," + PaymentSchema.TOTAL + " TEXT NOT NULL"
+ "," + PaymentSchema.HIDDEN + " INTEGER NOT NULL"
+ ");");

有人能帮我解决这个问题吗

实际上我想把id从4更新到5 我可以确保4和5都是付款表的现有ID

但同样的问题发生了，所以我把4改成了4。 我想如果我能解决4比4的问题，我应该解决4比5的问题

非常感谢你的回答