Question

Does anybody know if this is allowed?

IF CALL GET_RIGHT_NODE(edge) = 15
THEN
SELECT "IT WORKS";

I’m getting an error on this syntax, is it possible any other way?

Answer 1

The return values from stored procedures should be captured in OUT paramters (whereas those from user defined functions can be captured as @returnValue = function()).

So, your GET_RIGHT_NODE should take an OUT parameter and set it to the return value.

CREATE PROCEDURE GET_RIGHT_NODE
(
     @edge INT,
     @returnValue INT OUTPUT
)
AS

-- Definition of the proc.

then you would call the procedure as follows:

DECLARE @returnValue INT

CALL GET_RIGHT_NODE(@edge, @returnValue)

IF (@returnValue = 15)
THEN
    SELECT 'IT WORKS'