SQL - parametrized procedure with multiple parameters as array - sql

Question

I have very simple procedure:
CREATE PROCEDURE [Report]
#statusValue varchar(200) = '%'
AS
BEGIN
SELECT * FROM SomeTable
WHERE Something LIKE UPPER(#statusValue)
END
I'd like to provide user set multiple statusValue. Because there is 6 levels of statusValue in my table, I'd like to provide user to define required statusValue into procedure parameters - something like array.
I don't know, how it exactly works - I'm very new in this area - but I'm supposing to have procedure like this one:
EXEC Report #statusValue = 'statusValue1|statusValue2|statusValue3'
Do you happen to know, how can I adjust my procedure to have required output. Many thanks in advance.

Answer 1

Use following user defined function to return values from delimited string (say pipe):
CREATE FUNCTION [dbo].[stringlist_to_table]
(#list varchar(8000),
#delimiter nchar(1) = N',')
RETURNS #tbl TABLE (value varchar(8000)) AS
BEGIN
DECLARE #pos int,
#tmpstr varchar(8000),
#tmpval varchar(8000);
SET #tmpstr = #list;
SET #pos = charindex(#delimiter , #tmpstr);
WHILE #pos > 0
BEGIN
SET #tmpval = ltrim(rtrim(left(#tmpstr, #pos - 1)))
INSERT #tbl (value) VALUES(#tmpval)
SET #tmpstr = substring(#tmpstr, #pos + 1, len(#tmpstr))
SET #pos = charindex(#delimiter, #tmpstr)
END
INSERT #tbl(value) VALUES (ltrim(rtrim(#tmpstr)));
RETURN
END
Now use the following procedure to get the required output:
CREATE PROCEDURE [Report]
#statusValue varchar(200) = '%'
AS
BEGIN
DECLARE #iterator INT = 1;
DECLARE #total INT = 1;
DECLARE #keyword VARCHAR(100) = '';
SELECT ROW_NUMBER() OVER (ORDER BY value) SNo, value keyword
INTO #temp
FROM dbo.stringlist_to_table(#statusValue, '|')
SELECT *
INTO #output
FROM SomeTable
WHERE 1 = 0;
SELECT #total = MAX(SNo), #iterator = MIN(Sno)
FROM #temp
WHILE (#iterator <= #total)
BEGIN
SELECT #keyword = '%' + keyword + '%'
FROM #temp
WHERE SNo = #iterator;
INSERT INTO #output
SELECT *
FROM SomeTable
WHERE Something LIKE #keyword
SET #iterator = #iterator + 1;
END
SELECT *
FROM #output;
DROP TABLE #output, #temp;
END

Answer 2

You need the split function in this case. As there is no way to handle what you need. Another approach to add many variables. But in your case it will be enough to create split function and use it to parse your string. Please find the split function below:
CREATE FUNCTION [dbo].[ufnSplitInlineStringToParameters] (
#list NVARCHAR(MAX)
,#delim NCHAR(1) = ','
)
RETURNS TABLE
AS
RETURN
WITH csvTbl(START, STOP) AS (
SELECT START = CONVERT(BIGINT, 1)
,STOP = CHARINDEX(#delim, #list + CONVERT(NVARCHAR(MAX), #delim))
UNION ALL
SELECT START = STOP + 1
,STOP = CHARINDEX(#delim, #list + CONVERT(NVARCHAR(MAX), #delim), STOP + 1)
FROM csvTbl
WHERE STOP > 0
)
SELECT LTRIM(RTRIM(CONVERT(NVARCHAR(4000), SUBSTRING(#list, START, CASE
WHEN STOP > 0
THEN STOP - START
ELSE 0
END)))) AS VALUE
FROM csvTbl
WHERE STOP > 0
GO

Answer 3

One of the simplest way to achieve this is using a custom type. Sample snippet as follows:
CREATE TYPE dbo.StatusList
AS TABLE
(
statusValue varchar(200)
);
GO
CREATE PROCEDURE [Report]
#statusValue AS dbo.StatusList READONLY
AS
BEGIN
SELECT * FROM SomeTable
WHERE Something IN (SELECT * FROM #statusValue)
END
GO
--EDIT---
If you are using SSMS, you can execute the procedure as follows:
DECLARE #status dbo.StatusList
INSERT INTO #status VALUES('Pending')
EXEC [Report] #status