datepart in ssis

"\\"+_"+ (DT_STR,4,1252)DATEPART( "yyyy" , @[System::StartTime] ) +
RIGHT("0" + (DT_STR,4,1252)DATEPART( "mm" , @[System::StartTime] ), 2) +
RIGHT("0" + (DT_STR,4,1252)DATEPART( "dd" , @[System::StartTime] ), 2) +
RIGHT("0" + (DT_STR,4,1252)DATEPART( "hh" , @[System::StartTime] ), 2) +
RIGHT("0" + (DT_STR,4,1252)DATEPART( "mi" , @[System::StartTime] ), 2) +
RIGHT("0" + (DT_STR,4,1252)DATEPART( "ss" , @[System::StartTime] ), 2) +
".log"

居然发现2014年的这个草稿, 是做BI项目的一段代码. 

打算抽个机会讲讲BI项目的整体架构和设计策略, 总结一个项目模式出来, 把大伙从存储过程和维护性的海洋中拯救出来