如果 transaction.Rollback/Commit 在关闭连接之前从未调用过会怎样?

What happens if transaction.Rollback/Commit never called in before closing the connection?

如果交易发生了什么。Rollback/Commit在关闭连接之前从未调用过?

public DBStatus InsertUpdateUserProfile(Int64 UserID, W_User_Profile oUser)
{
    MySqlConnection oMySQLConnecion = null;
    MySqlTransaction tr = null;
    DBStatus oDBStatus = new DBStatus();
    try
    {
        oMySQLConnecion = new MySqlConnection(DatabaseConnectionString);
        if (oMySQLConnecion.State == System.Data.ConnectionState.Closed || oMySQLConnecion.State == System.Data.ConnectionState.Broken)
        {
            oMySQLConnecion.Open();
        }

        tr = oMySQLConnecion.BeginTransaction();

        if (oMySQLConnecion.State == System.Data.ConnectionState.Open)
        {
            string Query = @"INSERT INTO user .....................;"
                            INSERT IGNORE INTO user_role ....................;";

            MySqlCommand oCommand = new MySqlCommand(Query, oMySQLConnecion);
            oCommand.Transaction = tr;

            oCommand.Parameters.AddWithValue("@UserID", UserID);                            
            oCommand.Parameters.AddWithValue("@AddressID", oUser.AddressID);                                 
    ................
    ................


            int sqlSuccess = oCommand.ExecuteNonQuery();

            if (sqlSuccess>0)
            {
                tr.Commit();
                oDBStatus.Type = DBOperation.SUCCESS;
                oDBStatus.Message.Add(DBMessageType.SUCCESSFULLY_DATA_UPDATED);
            }
            oMySQLConnecion.Close();
        }
        else
        {
            oDBStatus.Type = DBOperation.ERROR;
            oDBStatus.Message.Add(DBMessageType.ERROR_DUE_TO_NO_DB_CONNECTION);
        }
        return oDBStatus;
    }
    catch (Exception ex)
    {
        if (oMySQLConnecion.State == System.Data.ConnectionState.Open)
        {
            tr.Rollback();
            oMySQLConnecion.Close();
        }
        oDBStatus.Type = DBOperation.ERROR;
        oDBStatus.Message.Add(DBMessageType.ERROR_OR_EXCEPTION_OCCURED_WHILE_UPDATING);
        oDBStatus.InnerException.Add(ex.Message);
        return oDBStatus;
    }
} 

在上面的函数中,如果交易成功,我会提交,如果失败并且连接仍然存在,我会回滚。

如果连接终止,则不会回滚。我读过很多地方说如果连接在没有提交的情况下终止(我想要的),它将自动回滚。这是一种不好的做法吗?我可以在连接建立后添加 try-catch,但在每个类似的函数中添加很少的代码。真的有必要吗?

What happens if transaction.Rollback/Commit never called in before closing the connection ?

在 MySQL 中事务被回滚。但是其他一些 table 服务器在连接关闭时提交它。

专业提示:不要依赖此行为,除非作为处理硬崩溃的一种方式。