Question

I would like to create a stored procedure in Sql Server that calls one of a number of different stored procedures and chooses which one based on the parameter supplied to it, but I can’t seem to get the choosing syntax right.

Currently attempting:

Begin
  Set nocount on;
  exec iif(param='individual', sp_FindIndividualRespondents, 
      iif(param='org', sp_FindOrgRespondents, sp_FindGroupRespondents))
End

This is currently telling me: Incorect syntax near ‘param’.

I have looked here: conditional where clause based on a stored procedure parameter?, but I can’t work out how to change that code to suit my situation.

How do i provide a parameter to a stored procedure and then use it to choose and run a different stored procedure?

Answer 1

BEGIN
SET NOCOUNT ON;

   DECLARE @queryToRun NVARCHAR(128) = 'EXECUTE ';

   SELECT @queryToRun = @queryToRun + CASE
                                         WHEN param = 'individual'
                                            THEN 'sp_FindIndividualRespondents'
                                         WHEN param = 'org'
                                            THEN 'sp_FindOrgRespondents'
                                         ELSE 'sp_FindGroupRespondents'
                                      END

    EXECUTE sp_executesql @queryToRun;
END

---

If you do not need the dynamic sql, which it appears in this example you do not, you can simply check the value and run the appropriate stored procedures:

BEGIN
SET NOCOUNT ON;

   IF param = 'individual'
      EXECUTE sp_findIndividualRespondents;
   ELSE IF param = 'org'
      EXECUTE sp_FindOrgRespondents;
   ELSE
      EXECUTE sp_FindGroupRespondents;
END