How Can I Use A Stored Procedure Call Inside The WHERE?

Hi folks
I nead to call a stored procedure in a where statemene, but MSSQL dont like that.

My problem is that the StoredProcedure is calling itself recursive and therfore its impossible to add the code as a standard SELECT statement. Here is the code



ALTER PROCEDURE dbo.advsp_FilterRecordRights
@RequesterGUID Char(20),
@EntityGUID Char(20)
AS
BEGIN
if not Exists(Select *


from GUIDRightsH
where GUIDRightsH.EntityGUID = @EntityGUID and

GUIDRightsH.RequesterGUID = @RequesterGUID and
GUIDRightsH.RecProp <> 0)
Begin

Return 1
end


if not Exists(Select *


from UsergroupMembers
where UserGroupMembers.UsergroupGUID = @RequesterGUID and
dbo.advsp_FilterRecordRights(UserGroupMembers.UserGUID,@EntityGUID) = 1)
Begin

Return 1
end


Return 0

END