Is it possible to create SQL SERVER Function using transaction - sql-server

Question

I have a simple script which basically do a lot of db operation. Now I have a requirement to upgrade the database for which I need to include a creation of function inside the same transaction.
BEGIN TRY --Start the Try Block..
BEGIN TRANSACTION -- Start the transaction..
-- HERE I need to add one function like
IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[FuctionTest]') AND type in (N'FN', N'IF', N'TF', N'FS', N'FT'))
DROP FUNCTION [dbo].[FuctionTest]
GO
CREATE FUNCTION FuctionTest
(
#inputVal int
)
RETURNS int
AS
BEGIN
RETURN (Select Id from [dbo].[test] where Id=#inputVal)
END
UPDATE MyChecking SET Amount = Amount - #Amount
WHERE AccountNum = #AccountNum
UPDATE MySavings SET Amount = Amount + #Amount
WHERE AccountNum = #AccountNum
COMMIT TRAN -- Transaction Success!
END TRY
BEGIN CATCH
IF ##TRANCOUNT > 0
ROLLBACK TRAN --RollBack in case of Error
How will I get this job done? I don't want to use a separate script to create the function.

Answer 1

yes, use EXEC('...') like:
--list all functions named like '%test_function%', which will not find any
SELECT [name] FROM sys.objects WHERE [name] like '%test_function%'
--create a function named 'test_function1'
exec ('create function [dbo].[test_function1] (#x int) returns varchar(50) as BEGIN return convert(varchar(50),#x)+''!'' END')
begin transaction
--create a function 'test_function2', which will be rolled back
exec ('create function [dbo].[test_function2] (#x int) returns varchar(50) as BEGIN return convert(varchar(50),#x)+''!!!!'' END')
rollback
--show the functions named like '%test_function%'
--which will only find 'test_function1', since 'test_function2'
--was rolled back
SELECT [name] FROM sys.objects WHERE [name] like '%test_function%'
OUTPUT:
name
-----------------------
(0 row(s) affected)
name
-------------------------
test_function1
(1 row(s) affected)
EDIT to show a begin try block....
BEGIN TRY
--list all functions named like '%test_function%', which will not find any
SELECT [name] FROM sys.objects WHERE [name] like '%test_function%'
--create a function named 'test_function1'
exec ('create function [dbo].[test_function1] (#x int) returns varchar(50) as BEGIN return convert(varchar(50),#x)+''!'' END')
begin transaction
--create a function 'test_function2', which will be rolled back
exec ('create function [dbo].[test_function2] (#x int) returns varchar(50) as BEGIN return convert(varchar(50),#x)+''!!!!'' END')
RAISERROR('force catch!',16,1) --send control to the BEGIN CATCH block
--should never get here
COMMIT
END TRY
BEGIN CATCH
IF XACT_STATE()!=0
BEGIN
ROLLBACK TRANSACTION
END
PRINT CASE WHEN ERROR_NUMBER() IS NOT NULL THEN 'Msg '+CONVERT(varchar(30),ERROR_NUMBER()) ELSE '' END+CASE WHEN ERROR_SEVERITY() IS NOT NULL THEN ', Level '+CONVERT(varchar(30),ERROR_SEVERITY()) ELSE '' END+CASE WHEN ERROR_STATE() IS NOT NULL THEN ', State '+CONVERT(varchar(30),ERROR_STATE()) ELSE '' END+CASE WHEN ERROR_PROCEDURE() IS NOT NULL THEN ', Procedure '+ERROR_PROCEDURE() ELSE '' END+CASE WHEN ERROR_LINE() IS NOT NULL THEN ', Line '+CONVERT(varchar(30),ERROR_LINE()) ELSE '' END+CASE WHEN ERROR_MESSAGE() IS NOT NULL THEN ', '+ERROR_MESSAGE() ELSE '' END
END CATCH
--show the functions named like '%test_function%'
--which will only find 'test_function1', since 'test_function2'
--was rolled back
SELECT [name] FROM sys.objects WHERE [name] like '%test_function%'
OUTPUT:
name
---------------------------------------------------
(0 row(s) affected)
Msg 50000, Level 16, State 1, Line 14, force catch!
name
---------------------------------------------------
test_function1
(1 row(s) affected)