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SSIS Expression doesn't work for concatenation.


SSIS Expression doesn't work for concatenation.

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Learner093
Learner093
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I have this SSIS expression and it is evaluated as below with the default values replacing the SSIS variables. This is the raw expression:

"Select "+(DT_STR, 20, 1252)@[User::BatchID]+ " as BatchID, '" +@[User::BatchDateISO]+ "' as BatchDateISO, 'FH' as RecordType, 'AS400' as SourceSystem, CASE WHEN LEN("+(DT_STR, 10, 1252)@[User::FileLoadNumber]+") = CAST(1 as VARCHAR) THEN '0'+'"+ (DT_STR, 10, 1252) @[User::FileLoadNumber]+"'+'"+@[User::BatchDateISO]+"' ELSE '"+ (DT_STR, 10, 1252) @[User::FileLoadNumber]+"'+'"+@[User::BatchDateISO]+"' END as FileLoadNumber"

It is evaluated as:

Select 9 as BatchID, '20121017' as BatchDateISO, 'FH' as RecordType, 'AS400' as SourceSystem, CASE WHEN LEN(9) = CAST(1 as VARCHAR) THEN '0'+'9'+'20121017' ELSE '9'+'20121017' END as FileLoadNumber

This is returning the result without prepending 0, which means always the ELSE part in CASE is chosen for FileLoadNumber column value.

If the BatchID value is of single digit it has to concatenate with BatchDateISO by appending 0 in front of BatchID

If BatchID is 9, then the result should be 0920121017 for FileLoadNumber column
If it is 19, then the result should be 1920121017 for FileLoadNumber column

Thanks a lot!
kl25
kl25
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Cross post. See:
http://www.sqlservercentral.com/Forums/Topic1374114-364-1.aspx
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