TSQL: union results from two selects (procedures?)

Question

I have two procedures - two huge sets of selects with several sub-select and unions. I need to union results from these procedures and I still need them to exists separately.

Something like that:

if @Param = 1 Then 
    PROCEDURE1
if @Param = 2 THEN 
    PROCEDURE2
if @Param = 3 Then
    PROCEDURE1 union PROCEDURE2

I read that it's impossible to have union on procedures and I can't use temporary tables.

Any idea?

Answer 1

You can convert the procedures to views.

OR

You can exec the procedures into a temp table, and then exec the other one into the same temp table:

create table #sometable (table definition here)

if @Param = 1 or @Param = 3 begin
    insert #sometable exec PROCEDURE1
end

if @Param = 2 or @Param = 3 begin
    insert #sometable exec PROCEDURE2
end

select * from #sometable