Question

有没有办法在SSIS中的派生列转换中执行标量值函数？

-Scenario -

我的源数据库中有一个函数，它根据记录的UOM列中的UOM值转换权重。我想在ETL过程中使用这个功能，以确保我的体重测量总是磅。我可以在派生列中调用此函数吗？如果没有，我是否可以在数据流中使用另一个转换任务（试图避免分段列）？

dbo.Tasks表

id |  Name  | netWeight | grossWeight | UOM
12   Task12     30000        50000      10

dbo.MeasurementUnits表

id |   Name    | Shortname | Type | Precision
12  Kilogram    kg          3   10000       
14  Pound       lb          3   10000

dbo.GetConvertedWeight函数

    ALTER  FUNCTION [dbo].[GetConvertedWeight](@iWeight money, @ifromUOM int, @iToUOM int) 
    RETURNS money
    AS  
    BEGIN 
    DECLARE @lConvertedWeight money, 
            @lKgToGrams money,
            @lLbToGrams money,
            @lOzToGrams money,
            @lWeightInGrams money

    --convert the weight to grams first.
    SELECT @lWeightInGrams = CASE WHEN @iFromUOM = 12 THEN (ISNULL(@iWeight,0) * 1000)
                         WHEN @iFromUOM = 14 THEN (ISNULL(@iWeight,0) * 453.5924)
                         WHEN @iFromUOM = 15 THEN (ISNULL(@iWeight,0) * 28.3495)
                         WHEN @iFromUOM = 13 THEN (ISNULL(@iWeight,0))
                         ELSE ISNULL(@iWeight,0)
                         END

    --Convert the converted weight to grams to the desired weight
    SELECT @lConvertedWeight = CASE WHEN @iToUOM = 12 THEN (ISNULL(@lWeightInGrams,0) / 1000)
                            WHEN @iToUOM = 13 THEN ISNULL(@lWeightInGrams,0)
                            WHEN @iToUOM = 14 THEN (ISNULL(@lWeightInGrams,0)/453.5924)
                            WHEN @iToUOM = 15 THEN (ISNULL(@lWeightInGrams,0) / 28.3495 )
                            ELSE (ISNULL(@lWeightInGrams,0)/453.5924)
                            END
RETURN @lConvertedWeight

示例函数调用

dbo.GetConvertedWeight(dbo.Tasks.netWeight, dbo.Tasks.weightUOM, 14) AS netWeight

Answer 1

不。你需要的是OLE DB Command来做到这一点。将结果发送到输出列，生活应该对你很敏感 - 至少对于SSIS而言。

在SSIS中调用标量值函数

1 个答案: