Calculated Parameter in WHERE - sql-server

Question

I am trying to use a carriage return separated list of parameters in an IN list of the where statement of my query.
I can turn the list into one comma separated string in the correct format using replace function, however when I put this in the IN list, it returns nothing.
The query below returns the comma separated list as expected.
declare #VarCodes varchar(max)
set #VarCodes = '123-1
123-10
123-100
61
66
67
75'
(select ''''+replace(replace(REPLACE(#VarCodes,char(13),''''+', '+''''),char(32),''),char(10),'')+'''')
'123-1','123-10','123-100','61','66','67','75'
If I paste this text directly in the query below, it returns data as expected.
select vad_variant_code from variant_detail where vad_variant_code in ('123-1','123-10','123-100','61','66','67','75')
If I put the parameter in the in, it returns nothing.
select vad_variant_code from variant_detail where vad_variant_code in ((select ''''+replace(replace(REPLACE(#VarCodes,char(13),''''+', '+''''),char(32),''),char(10),'')+''''))
I am assuming this is because the IN is expecting a comma separated list of strings, where as the replace function is returning one long string?
Can this be achieved?

Answer 1

Try this...
declare #VarCodes varchar(max), #Xml XML;
set #VarCodes = '123-1,123-10,123-100,61,66,67,75'
SET #Xml = N'<root><r>' + replace(#VarCodes, ',','</r><r>') + '</r></root>';
select vad_variant_code from variant_detail
where vad_variant_code in (
select r.value('.','varchar(max)') as item
from #Xml.nodes('//root/r') as records(r)
)

Answer 2

I have this code as a TVF based originally on Jeff Moden's code:
CREATE FUNCTION [dbo].[cSplitter] (#Parameter VARCHAR(MAX))
RETURNS #splitResult TABLE (number INT, [value] VARCHAR(100))
AS
BEGIN
SET #Parameter = ','+#Parameter +',';
WITH cteTally AS
(
SELECT TOP (LEN(#Parameter))
ROW_NUMBER() OVER (ORDER BY t1.Object_ID) AS N
FROM Master.sys.All_Columns t1
CROSS JOIN Master.sys.All_Columns t2
)
INSERT #splitResult
SELECT ROW_NUMBER() OVER (ORDER BY N) AS Number,
SUBSTRING(#Parameter,N+1,CHARINDEX(',',#Parameter,N+1)-N-1) AS [Value]
FROM cteTally
WHERE N < LEN(#Parameter) AND SUBSTRING(#Parameter,N,1) = ','
RETURN
END
With this TVF in my database, my "IN" queries can accept a comma separated list of values like this:
DECLARE #VarCodes VARCHAR(MAX);
SET #VarCodes = '123-1
123-10
123-100
61
66
67
75';
DECLARE #csv VARCHAR(MAX);
SET #csv = REPLACE(REPLACE(REPLACE(#VarCodes, CHAR(13), ','), CHAR(32), ''),
CHAR(10), '');
SELECT vad_variant_code
FROM variant_detail
WHERE EXISTS ( SELECT *
FROM [cSplitter](#csv) AS [cs]
WHERE [cs].[value] = vad_variant_code );