How to dynamically set the value of a parameter in sp_executesql without modifying the calling software

Question

I'm currently working with a stored procedure that executes an INSERT statement using EXEC sp_executesql. The procedure takes several parameters, including @TRANSACTIONNUM, @CUSTOMERNUM, @VALUE, and @VALID. The value of @VALID is currently hardcoded to 0. However, I need to dynamically set the value of @VALID based on certain conditions whenever the SP is called.

The challenge is that this stored procedure is being called by a software application , and we cannot afford to update the software or take the server down at this time to make changes.

One possible solution I've heard is Wrapper function, However, I'm not sure if this would be feasible or if there are any potential pitfalls or limitations to consider.

Here's the current stored procedure called by the abovementioned software (Grabbed from SQL profiler) :

EXEC sp_executesql
N'
    INSERT INTO CUSTOMERINVEST
    (
        TRANSACTIONNUM,
        CUSTOMERNUM,
        VALUE,
        VALID
    )
    VALUES
    (
        @TRANSACTIONNUM,
        @CUSTOMERNUM,
        @VALUE,
        @VALID
    )
',
N'
    @TRANSACTIONNUM nvarchar(25),
    @CUSTOMERNUM nvarchar(25),
    @VALUE nvarchar(25),
    @VALID int
',
@TRANSACTIONNUM = '4567654-879975',
@CUSTOMERNUM = '7654666765',
@VALUE = '86786765675',
@VALID = 0

Answer 1

In SQL Server 2008 try creating this wrapper stored procedure:

CREATE PROCEDURE dbo.WrapperInsertCustomerInvest
    @TRANSACTIONNUM nvarchar(25),
    @CUSTOMERNUM nvarchar(25),
    @VALUE nvarchar(25)
AS
BEGIN
    DECLARE @VALID int;

    -- Determine the value of @VALID based on your conditions
    -- Example condition: set @VALID to 1 if @VALUE is greater than a certain amount
    IF CAST(@VALUE AS BIGINT) > 1000000
    BEGIN
        SET @VALID = 1;
    END
    ELSE
    BEGIN
        SET @VALID = 0;
    END

    -- Call the original INSERT statement using sp_executesql
    DECLARE @sql nvarchar(max);
    SET @sql = N'
    INSERT INTO CUSTOMERINVEST
    (
        TRANSACTIONNUM,
        CUSTOMERNUM,
        VALUE,
        VALID
    )
    VALUES
    (
        @TRANSACTIONNUM,
        @CUSTOMERNUM,
        @VALUE,
        @VALID
    )';

    EXEC sp_executesql
        @sql,
        N'@TRANSACTIONNUM nvarchar(25), @CUSTOMERNUM nvarchar(25), @VALUE nvarchar(25), @VALID int',
        @TRANSACTIONNUM = @TRANSACTIONNUM,
        @CUSTOMERNUM = @CUSTOMERNUM,
        @VALUE = @VALUE,
        @VALID = @VALID;
END