Bin fitting with a counter using both analytics and model clause.

Question

11.2.0.3
This falls under 'just want to figure out how to do it'. Its not critical for work. I want to try to see if its possible to do this with both analytic function and with a model clause. Just to see if its possible. It has been stumping me.
I got the idea to look at this from this article about bin fitting. I have been playing with the model clause and I think you would do something with the 'increment' clause, but I dont see a way to reset it to 1 at a certain point.
http://www.oracle.com/technetwork/issue-archive/2012/12-mar/o22asktom-1518271.html
The case I want to look at is, bin fitting based on a counter and a partition by. In theory this should be simpler than the example in the link.
[code]
create table myrooms (
room_number number,
person_id        number);
create unique index myrooms_ind on myrooms(room_number,person_id);
[/code]
Person_id is not unique. So row_number is more appropriate than rank or dense_rank.
Problem: Partition by room_number, assign up to 50 people to a specific group with in the same room. This seems like it could be handled with a row_number() and a window clause, but that is not supported.
I need to basically translate the old procedural counter into sql:
pseudo-code that does not compile that would have a reason to use this logic.
[code]
declare
  cursor curGetRoom
     select room_number,person_id
        from my rooms
      order by room_number;
counter number := 1;
vCurrentRoom myroom.room_number%type;
begin
    for i in curGetRoom loop
        if vCurrentRoom is null then
           vCurrentRoom := i.room_number;
        elsif vCurrentRoom = i.room_number then
              if counter < 51 then counter :=counter+1;
              else counter := 1;
        else
             vCurrentRoom := i.room_number;
            counter :=1;
        end if;
end;
[/code]
simple partition query., but I dont see a way to limit this to 50 and then start over. Window functions are not supported with row_number()
[code]
select room_number,person_id,row_number() over (partition by room_number order by person_id) rn
from myrooms
[/code]

Answer 1

11.2.0.3
This falls under 'just want to figure out how to do it'. Its not critical for work. I want to try to see if its possible to do this with both analytic function and with a model clause. Just to see if its possible. It has been stumping me.
I got the idea to look at this from this article about bin fitting. I have been playing with the model clause and I think you would do something with the 'increment' clause, but I dont see a way to reset it to 1 at a certain point.
http://www.oracle.com/technetwork/issue-archive/2012/12-mar/o22asktom-1518271.html
The case I want to look at is, bin fitting based on a counter and a partition by. In theory this should be simpler than the example in the link.
[code]
create table myrooms (
room_number number,
person_id        number);
create unique index myrooms_ind on myrooms(room_number,person_id);
[/code]
Person_id is not unique. So row_number is more appropriate than rank or dense_rank.
Problem: Partition by room_number, assign up to 50 people to a specific group with in the same room. This seems like it could be handled with a row_number() and a window clause, but that is not supported.
I need to basically translate the old procedural counter into sql:
pseudo-code that does not compile that would have a reason to use this logic.
[code]
declare
  cursor curGetRoom
     select room_number,person_id
        from my rooms
      order by room_number;
counter number := 1;
vCurrentRoom myroom.room_number%type;
begin
    for i in curGetRoom loop
        if vCurrentRoom is null then
           vCurrentRoom := i.room_number;
        elsif vCurrentRoom = i.room_number then
              if counter < 51 then counter :=counter+1;
              else counter := 1;
        else
             vCurrentRoom := i.room_number;
            counter :=1;
        end if;
end;
[/code]
simple partition query., but I dont see a way to limit this to 50 and then start over. Window functions are not supported with row_number()
[code]
select room_number,person_id,row_number() over (partition by room_number order by person_id) rn
from myrooms
[/code]