Update UDF names stored in table to add parameter value - sql

Question

I have thousands of UDF names stored in table and executed dynamically where it is required. The problem is I have added one new parameter unit to the function dbo.GetStockPrice(6544,1) so I need to send one more parameter value for now 1 bue it can be any and the data should be changed to dbo.GetStockPrice(6544,1,1) for all the rows where dbo.GetStockPrice is exist. So I am seeking for the query to update these all at once.
Sample Data
DECLARE #table AS TABLE(id INT, UDF VARCHAR(1000))
INSERT INTO #table VALUES
(7774,'dbo.GetStockPrice(1211,1)*dbo.GetStockPrice(1211,1)'),
(7775,'dbo.GetStockPrice(232,1)'),
(7778,'dbo.GetStockPrice(6456,1)'),
(7780,'dbo.GetStockPrice(34,1)'),
(7784,'dbo.FNACondition(dbo.FNAMargin(1,NULL,0), 0, dbo.GetStockPrice(654,1)+1)'),
(7786,'dbo.GetStockPrice(9876,1)'),
(7906,'dbo.GetStockPrice(5565,1)'),
(7911,'dbo.GetStockPrice(7886,1)'),
(7912,'dbo.GetStockPrice(87,1)'),
(8403,'dbo.PriceValue(479,NULL,NULL)*dbo.GetStockPrice(6544,1)+dbo.FNAMargin(1,NULL,0)')
Expected Output:
7774 dbo.GetStockPrice(1211,1,1)*dbo.GetStockPrice(1211,1,1)
7775 dbo.GetStockPrice(232,1,1)
so on......
I am still trying with REPLACE, SUBSTRING but unable to come out with any solution. Getting difficulties with it's different length and position in the row.
Seeking Help !! Thank you in Advance :)

Answer 1

Try it with this approach:
DECLARE #table AS TABLE(id INT, UDF VARCHAR(1000))
INSERT INTO #table VALUES
(7774,'dbo.GetStockPrice(1211,1)*dbo.GetStockPrice(1211,1)'),
(7775,'dbo.GetStockPrice(232,1)'),
(7778,'dbo.GetStockPrice(6456,1)'),
(7780,'dbo.GetStockPrice(34,1)'),
(7784,'dbo.FNACondition(dbo.FNAMargin(1,NULL,0), 0, dbo.GetStockPrice(654,1)+1)'),
(7786,'dbo.GetStockPrice(9876,1)'),
(7906,'dbo.GetStockPrice(5565,1)'),
(7911,'dbo.GetStockPrice(7886,1)'),
(7912,'dbo.GetStockPrice(87,1)'),
(7913,'dbo.Blah(87,1)'),
(8403,'dbo.PriceValue(479,NULL,NULL)*dbo.GetStockPrice(6544,1)+dbo.FNAMargin(1,NULL,0)');
--The query
WITH SplitToParts AS
(
SELECT t.*
,A.parted
,ROW_NUMBER() OVER(ORDER BY (SELECT NULL)) AS PartNr
,B.part.value('text()[1]','nvarchar(max)') AS Part
FROM #table AS t
CROSS APPLY(SELECT CAST('<x>' + REPLACE((SELECT t.UDF AS [*] FOR XML PATH('')),'dbo.GetStockPrice(','</x><x>$$$FoundIt$$$</x><x>') + '</x>' AS XML)) AS A(parted)
CROSS APPLY parted.nodes(N'/x') AS B(part)
WHERE UDF LIKE '%dbo.GetStockPrice(%'
)
,modified AS
(
SELECT *
,CASE WHEN LAG(stp.Part) OVER(PARTITION BY id ORDER BY PartNr)='$$$FoundIt$$$' THEN STUFF(stp.Part,CHARINDEX(')',stp.Part),0,',1') ELSE stp.Part END AS Added
FROM SplitToParts AS stp
)
SELECT t2.*
,(
SELECT REPLACE(m.added,'$$$FoundIt$$$','dbo.GetStockPrice(')
FROM modified AS m
WHERE m.id=t2.id
ORDER BY m.PartNr
FOR XML PATH(''),TYPE
).value('.','nvarchar(max)')
FROM #table AS t2
WHERE UDF LIKE '%dbo.GetStockPrice(%';
The result
7774 dbo.GetStockPrice(1211,1,1)*dbo.GetStockPrice(1211,1,1)
7775 dbo.GetStockPrice(232,1,1)
7778 dbo.GetStockPrice(6456,1,1)
7780 dbo.GetStockPrice(34,1,1)
7784 dbo.FNACondition(dbo.FNAMargin(1,NULL,0), 0, dbo.GetStockPrice(654,1,1)+1)
7786 dbo.GetStockPrice(9876,1,1)
7906 dbo.GetStockPrice(5565,1,1)
7911 dbo.GetStockPrice(7886,1,1)
7912 dbo.GetStockPrice(87,1,1)
8403 dbo.PriceValue(479,NULL,NULL)*dbo.GetStockPrice(6544,1,1)+dbo.FNAMargin(1,NULL,0)
Some explanation: The string will be cut in parts using your function's name as splitter. Gladfully you tagged this with [sql-server-2012] so you can use LAG(). This will test the previous element, if it is $$$FoundIt$$$. In this case the first closing bracket will get an additional ,1. The rest is reconcatenation.
Attention: If your call might include a computed value such as
dbo.GetStockPrice(1211,(1+2))
or
dbo.GetStockPrice(dbo.SomeOtherFunc(1),1)
...the first closing bracket is the wrong place to insert the ,1. But this would get really tricky... You'd have to run through it, char by char, and count the opening brackets to find the related closing one.