take minus(-) sign number from sting and use in in different procedure - sql

Question

I have variable
DECLARE #Routs NVARCHAR(1024)
#i int
SET #Routs = N'6,4,-5,8'
I need to extract any number from this sting, where it have minus sign before it (-5 in example)
and use it as input parameter with out (-) sing for example #i in different stored procedure.

Answer 1

Pass in you're #Routs parameter to a table valued function that will split the list into a table and then loop through the table and if the value is a negative number execute stored procedure or whatever you want or do nothing if its not negative.
--table function to split parameter by comma
ALTER FUNCTION [dbo].[SplitListOfInts] (#list nvarchar(MAX))
RETURNS #tbl TABLE (number int NOT NULL) AS
BEGIN
DECLARE #pos int,
#nextpos int,
#valuelen int
if len(rtrim(#list)) > 0
begin
SELECT #pos = 0, #nextpos = 1
WHILE #nextpos > 0
BEGIN
SELECT #nextpos = charindex(',', #list, #pos + 1)
SELECT #valuelen = CASE WHEN #nextpos > 0
THEN #nextpos
ELSE len(#list) + 1
END - #pos - 1
INSERT #tbl (number)
VALUES (convert(int, substring(#list, #pos + 1, #valuelen)))
SELECT #pos = #nextpos
END
end
RETURN
END
-- stored procedure that calls that split function and uses #routs parameter
CREATE TABLE #values(nbrValue int)
INSERT INTO #values(nbrValue
EXEC [dbo].[SplitListOfInts] #routs
--if you don't care about non-negatives delete them here
DELETE FROM #values
where nbrValue >= 0
DECLARE #i int
DECLARE #countrows = (SELECT COUNT(nbrValue) FROM #values)
WHILE #countrows >0
SET #i = (SELECT TOP 1 nbrValue FROM #values)
...do what you want
DELETE FROM #values where nbrValue=#i
set #countrows = (SELECT COUNT(nbrValue) FROM #values)
END