Question

SSIS 2005 : Converting text file negative amounts

Asked by: simon_kirk

Hi,

I have a text file with several numeric amounts in it.  The amounts could be negative and if so, the field will show like this:  0000-5597.  This figure is actually -55.97.  

I have set up two derived column transformations to get to the required result.  This works, but I would like to know if there is a better way of doing it.  The code that I am using is included in the snippet.
 
I did try to combine the two transformations into one, but could not get it to work.

Transformation one:
 
Derived UserAmountField1     REPLACE(UserAmountField1,"-","")
 
Transformation two:
 
Derived UseramountField1    (UserAmountField1 == [Derived UserAmountField1] ? (DT_NUMERIC,11,2)UserAmountField1 : ((DT_NUMERIC,11,2)[Derived UserAmountField1]) * -1) / 100
 
This is repeated for each numeric field in the source file.

                                  
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Asked On
2009-10-15 at 06:06:05ID24814620
Topic

SSIS

Participating Experts
1
Points
150
Comments
5

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Answers

 

by: stelth240Posted on 2009-10-15 at 15:20:23ID: 25585483

A derived column makes the most sense.  You could do it in a Script Component but that's definitely overkill.

I'm assuming the scale of the data is always two digits, so in that case I would do this:

(DT_I4) (REPLACE(LTRIM(REPLACE(UserAmountField1, '0',' ')), ' ','0')) / 100

I haven't tested that so I'm not 100% sure it'll work flawlessly.  Mostly, I'd be concerned with the casting but it should work.  If the data is not always two digits in the scale, I don't know how you'd figure out how many digits you would need at the right of the decimal.  Let me know if that's the case.

 

by: simon_kirkPosted on 2009-10-19 at 03:24:00ID: 25603909

Thanks for your reply.  That works, except for when the original value is zero.  Is there a function similar to isnull(fieldname,replacementvalue) where  I can replace any null results with a zero before dividing by 100?   I want a zero to be mapped to the data flow destination rather than a null.
 
I have created a work-around for now:
 
TotalContsplusInterest == "00000000" ? (DT_NUMERIC,11,2)"0" : ((DT_NUMERIC,11,2)(REPLACE(LTRIM(REPLACE(TotalContsplusInterest,"0"," "))," ","0"))) / 100

 

by: stelth240Posted on 2009-10-19 at 15:07:23ID: 25609445

Your workaround is actually how I would do it.  There is a function called IsNull but it doesn't replace with another value.  This is what I would do:

ISNULL(TotalContsplusInterest) ? 0 : TotalContsplusInterest == "00000000" ? 0 : TotalContsplusInterest

That would replace the original column which will keep the same data type.  If you were to create a new column you would have to cast like you did above:

ISNULL(TotalContsplusInterest) ? 0 : TotalContsplusInterest == "00000000" ? (DT_NUMERIC,11,2) 0 : ((DT_NUMERIC,11,2)(REPLACE(LTRIM(REPLACE(TotalContsplusInterest,"0"," "))," ","0"))) / 100

 

by: simon_kirkPosted on 2009-10-22 at 06:43:10ID: 25634049

Thanks for your input.  This is the code that I have ended up with and it works OK

LEN(LTRIM(REPLACE(TotalContsplusInterest,"0"," "))) == 0 ? (DT_NUMERIC,11,2)"0" : ((DT_NUMERIC,11,2)(REPLACE(LTRIM(REPLACE(TotalContsplusInterest,"0"," "))," ","0"))) / 100

                                              
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by: simon_kirkPosted on 2009-10-22 at 06:46:41ID: 31641588

pointed me in the right direction

20120131-EE-VQP-002

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