2

我有将数据插入 Oracle 数据库的 ac# 过程。我尝试使用批量插入，但性能非常糟糕，我不知道为什么。插入超过 100'000 行大约需要 1h30 ！

这是我的插入过程：

internal void InsertPublications(DateTime aDate, List<Model.Publication> aPublications, Action<int> aProgress, Action<int> aCallBack)
{
    List<List<Model.Publication>> _Publications = Split(aPublications, 128);

    int _InsertedCount = 0;

    var _Worker = new BackgroundWorker() { WorkerReportsProgress = true };

    _Worker.DoWork += (_Sender, _Args) =>
    {
        var           _TableName = string.Format("SRC_PUBLICATION_{0}", aDate.ToString("yyyyMMdd"));
        OracleCommand _Command;

        this.Connect();

        try
        {
            this.CreateOrReplaceTable(_TableName, SQL_CREATE_PULICATIONS_TABLE);

            foreach (var _PublicationSub in _Publications)
            {
                if (!DlgParamPublication.alive)
                {
                    break;
                }

                _Command = this.Connection.CreateCommand();
                _Command.CommandText = string.Format(SQL_INSERT_PULICATIONS, _TableName);
                _Command.CommandType = CommandType.Text;
                _Command.BindByName = true;
                _Command.ArrayBindCount = _PublicationSub.Count;

                _Command.Parameters.Add(":ANNEE", OracleDbType.NVarchar2, _PublicationSub.Select(_Item => _Item.Year).ToArray(), ParameterDirection.Input);
                _Command.Parameters.Add(":IDE_PUBLICATION", OracleDbType.NVarchar2, _PublicationSub.Select(_Item => _Item.Pid).ToArray(), ParameterDirection.Input);
                _Command.Parameters.Add(":IDE_TYPE_PUBLICATION", OracleDbType.NVarchar2, _PublicationSub.Select(_Item => _Item.IdePublicationType.ToString().ToLower()).ToArray(), ParameterDirection.Input);
                _Command.Parameters.Add(":IDE_TYPE_TRAVAIL", OracleDbType.NVarchar2, _PublicationSub.Select(_Item => _Item.IdeTypeOfWork.ToString().ToLower()).ToArray(), ParameterDirection.Input);
                _Command.Parameters.Add(":IDE_NIVEAU_ELEMENT_ORG", OracleDbType.NVarchar2, _PublicationSub.Select(_Item => _Item.UserRefType.ToString().ToLower()).ToArray(), ParameterDirection.Input);
                _Command.Parameters.Add(":IDE_ELEMENT_ORG", OracleDbType.NVarchar2, _PublicationSub.Select(_Item => _Item.UserRefValue).ToArray(), ParameterDirection.Input);
                _Command.Parameters.Add(":AUTEUR", OracleDbType.NClob, _PublicationSub.Select(_Item => _Item.Author).ToArray(), ParameterDirection.Input);

                _InsertedCount += _Command.ExecuteNonQuery();

                _Worker.ReportProgress(0, _InsertedCount);
            }
        catch (Exception _Exc)
        {
            ViewModel.DlgParamPublication.Logger.LogException("INSERT PUBLICATIONS", _Exc, false);
        }
        finally
        {
            this.Disconnect();
        }
    };

    _Worker.ProgressChanged    += (_Sender, _Args) => { aProgress((int)_Args.UserState); };
    _Worker.RunWorkerCompleted += (_Sender, _Args) => { aCallBack(_InsertedCount); };

    // Start background thread
    if (DlgParamPublication.alive)
    {
        _Worker.RunWorkerAsync();
    }
}

知道为什么要花这么长时间吗？

更新

有人有其他建议吗？我无法解决问题。

4

3 回答 3

1

这个想法是在单个存储过程调用中为每个参数发送值数组。您实际上是在发送单个值的数组n次，其中n是_Publications.

删除外部循环并将您_PublicationSub.Select的 's替换为_Publications.Select.

您还需要更改绑定计数_Command.ArrayBindCount = _Publications.Count;

为了使它更容易，我相信这是可行的：

try
        {
            this.CreateOrReplaceTable(_TableName, SQL_CREATE_PULICATIONS_TABLE);


            if (!DlgParamPublication.alive)
            {
                break;
            }

            _Command = this.Connection.CreateCommand();
            _Command.CommandText = string.Format(SQL_INSERT_PULICATIONS, _TableName);
            _Command.CommandType = CommandType.Text;
            _Command.BindByName = true;
            _Command.ArrayBindCount = _Publications.Count;

            _Command.Parameters.Add(":ANNEE", OracleDbType.NVarchar2, _Publications.Select(_Item => _Item.Year).ToArray(), ParameterDirection.Input);
            _Command.Parameters.Add(":IDE_PUBLICATION", OracleDbType.NVarchar2, _Publications.Select(_Item => _Item.Pid).ToArray(), ParameterDirection.Input);
            _Command.Parameters.Add(":IDE_TYPE_PUBLICATION", OracleDbType.NVarchar2, _Publications.Select(_Item => _Item.IdePublicationType.ToString().ToLower()).ToArray(), ParameterDirection.Input);
            _Command.Parameters.Add(":IDE_TYPE_TRAVAIL", OracleDbType.NVarchar2, _Publications.Select(_Item => _Item.IdeTypeOfWork.ToString().ToLower()).ToArray(), ParameterDirection.Input);
            _Command.Parameters.Add(":IDE_NIVEAU_ELEMENT_ORG", OracleDbType.NVarchar2, _Publications.Select(_Item => _Item.UserRefType.ToString().ToLower()).ToArray(), ParameterDirection.Input);
            _Command.Parameters.Add(":IDE_ELEMENT_ORG", OracleDbType.NVarchar2, _Publications.Select(_Item => _Item.UserRefValue).ToArray(), ParameterDirection.Input);
            _Command.Parameters.Add(":AUTEUR", OracleDbType.NClob, _Publications.Select(_Item => _Item.Author).ToArray(), ParameterDirection.Input);

            _InsertedCount += _Command.ExecuteNonQuery();

            _Worker.ReportProgress(0, _InsertedCount);
        }
    catch (Exception _Exc)
    {
        ViewModel.DlgParamPublication.Logger.LogException("INSERT PUBLICATIONS", _Exc, false);
    }
    finally
    {
        this.Disconnect();
    }

您可能希望删除后台工作人员的进度，因为这是一次性的、0-100% 的单次通话交易。

于 2012-04-23T11:58:25.303 回答
1

我不确定，但问题可能是 BindByName。我建议像这个例子中那样进行数字绑定 。

于 2013-01-26T04:20:33.840 回答
1

我将尝试在 foreach 循环之外创建 OracleCommand 和所有 OracleParameter。
在循环内部，我将添加当前迭代的值 

_Command = this.Connection.CreateCommand();             
_Command.CommandText = string.Format(SQL_INSERT_PULICATIONS, _TableName);             _Command.CommandType = CommandType.Text;             
_Command.BindByName = true;             
_Command.Parameters.Add(":ANNEE", OracleDbType.NVarchar2, "", ParameterDirection.Input);             _Command.Parameters.Add(":IDE_PUBLICATION", OracleDbType.NVarchar2, "", ParameterDirection.Input);             
.....

foreach (var _PublicationSub in _Publications)             
{ 
     _Command.Parameters[":ANNEE"].Value = _PublicationSub.Select(_Item => _Item.Year).ToArray();
     ....
}
于 2012-04-23T12:05:06.250 回答