Sql Clr用户定义类型解析浮点数并丢失精度

Question

我有一个Clr用户定义的类型，它接受一个用逗号分隔的值字符串。

转换为此类型时，我失去了一点精确度，我将其缩小到这行代码：

cast(cast(nlinkjt as nvarchar(100)) + ',' +cast(avglrwf as nvarchar(100)) + ',' + cast(avglrwfjt as nvarchar(100)) as dbo.CLRJourneyTime) as clrJT

输出= 29.9376,5.29633e-005,0.00158559

但是原始值是这样的：

nlinkjt = 29.9376097988521  = cast(nlinkjt as nvarchar)  = 29.9376
avglrwf = 5.29632961843163E-05  = cast(avglrwf as nvarchar) = 5.29633e-005
avglrwfjt =  0.00158559449482709  = cast(avglrwfjt as nvarchar) = 0.00158559

如何将浮动转换为字符串？

或者是否有另一种声明新的dbo.CLRJourneyTime的方式，就像在.net中一样 像这样：

'new dbo.CLRJourneyTime(nlinkjt , avglrwf , avglrwfjt ) as clrJT'

Answer 1

好的，刚刚发现浮动列只存储到大约4位小数..所以它可能不重要。