Question

Im trying to execute a scalar valued function in an insert query. Im using sql parameter collection but still stuck with it.

Query

Insert into PackageProducts values (@id, @name, @prodId, @prodCode)

// I want to call a scalar valued function to get value for the @prodCode when this query excecutes

Function

create function getProdCodeById(@id uniqueidentifier) returns varchar(15)
begin
declare @code varchar(15)
select @code=ProductCode from Products where ID=@id
return @code
end

What I’m trying to do

//create command, connection etc.. after than

DbParameter param = createParameter() ; // returns an empty parameter
param.Name = "@prodCode";
param.Value = String.Format("getProdCodeById('{0}')", 5);

when I execute , it takes the parameter value as a string.. the function never gets executed. Can you tell me what am I doing wrong here ?

Answer 1

Use a select statement for your function

SELECT [dbo].[getProdCodeById] (@id)

You can assign this to a variable before using it, as in

DECLARE @parameter varchar(15)
SET @parameter  = (SELECT [dbo].[getProdCodeById] (@id))

You can now use @parameter anywhere in your code