Question

我正在使用此示例将数据从SQL Server导出到PostgreSQL，当我开始导出时，300,000行需要12分钟，我可以做些什么来加快这个过程，或者你知道另一种方法呢？

string SourceDriver = "Driver={SQL Server Native Client 10.0}";
OdbcConnection SourceConnection = new OdbcConnection(SourceDriver+ ";Server=10.10.10.10;Database=sourceMSSQL;Uid=sa;Pwd=12345;");

string DestDriver = "Driver={PostgreSQL}";
OdbcConnection DestConnection = new OdbcConnection(DestDriver+ ";Server=10.10.10.11;Port=5432;Database=destPostgreSQL;Uid=postgres;Pwd=12345;");

string SourceSql = "SELECT Code, Label, Model, List, Size, Quantity, City, Family,  ExportDate FROM MovPedidosP0";
string DestSql = "INSERT INTO tmp_MovPedidosP0_t (Code, Label, Model, List, Size, Quantity, City, Family,  ExportDate) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?)";

using(OdbcCommand SourceCommand = new OdbcCommand(SourceSql, SourceConnection))
{
    SourceConnection.Open();
    using(OdbcDataReader SourceReader = SourceCommand.ExecuteReader())
    {
        Console.WriteLine("Exporting...");

        DestConnection.Open();

        while(SourceReader.Read())
        {
            using(OdbcCommand DestCommand = new OdbcCommand(DestSql, DestConnection))
            {
                DestCommand.Prepare();
                DestCommand.Parameters.Clear();

                for(int i=0; i<SourceReader.FieldCount; i++)
                {
                    DestCommand.Parameters.AddWithValue("?ID" + (i+1).ToString(), SourceReader[i]);
                }

                DestCommand.ExecuteNonQuery();
                TotalRows++;
            }
        }

        DestConnection.Close();
    }
}

SourceConnection.Close();

Answer 1

如果使用SSIS导出到文本文件并使用COPY命令导入，则更简单，可能更快。

Answer 2

尝试使用本机NpgsqlConnection和SqlConnection而不是Odbc连接。

http://npgsql.projects.pgfoundry.org/

http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.aspx

将数据从SQL Server导出到PostgreSQL

2 个答案: