sqlite android上的触发器不起作用

Question

触发器的目标是在表SHIFTS列移位更新或插入大于1的值时在表列GIORNI_SETT日期插入新记录，但我无法运行触发器，显然有问题但我做了不知道是什么，从日志看我没有错误，但是触发器不起作用，有人可以帮助我，谢谢。

public class DbHelper extends SQLiteOpenHelper {
static String DATABASE_NAME="turniDB.db";
public static final String TURNI="turni";
public static final String TURNI_ID="idturno";
public static final String TURNO="turno";

public static final String GIORNI_SETT="giorni";
public static final String GIORNI_ID="giorni_id";
public static final String GIORNI="giorni";
public static final String DATA="data";

public DbHelper(Context context) {
    super(context, DATABASE_NAME, null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
    String CREATE_TABLE="CREATE TABLE "+TURNI+" ("+TURNI_ID+" INTEGER PRIMARY KEY AUTOINCREMENT,"+TURNO+" TEXT)";
    db.execSQL(CREATE_TABLE);

    String CREATE_TABLE2="CREATE TABLE "+GIORNI_SETT+" ("+GIORNI_ID+" INTEGER PRIMARY KEY AUTOINCREMENT,"+GIORNI+" TEXT,"+DATA+" INTEGER)";
    db.execSQL(CREATE_TABLE2);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    db.execSQL("CREATE TRIGGER IF NOT EXISTS AGGIUNGI_DATA AFTER UPDATE ON TURNI FOR EACH ROW WHEN (new.turno > 0) ");
    db.execSQL(" BEGIN ");
    db.execSQL("INSERT INTO GIORNI_SETT (data) VALUES (1);");
    db.execSQL("END;");

    db.execSQL("DROP TRIGGER AGGIUNGI_DATA;");
    db.execSQL("DROP TABLE IF EXISTS "+TURNI);
    db.execSQL("DROP TABLE IF EXISTS "+GIORNI_SETT);
    onCreate(db);
}

public static void beginTransaction() {
    // TODO Auto-generated method stub
}

public static long insert(String string, Object object, ContentValues values) {
    // TODO Auto-generated method stub
    return 0;
}

}

Answer 1

创建 2 个表后，您的创建触发器查询应位于 onCreate 中，并且应如下所示：

db.execSQL("CREATE TRIGGER IF NOT EXISTS AGGIUNGI_DATA AFTER UPDATE ON " 
    + TURNI + " FOR EACH ROW WHEN (new.turno > 0) BEGIN INSERT INTO "
    + GIORNI_SETT + " (data) VALUES (1); END");