How to tell oracle to sort by a specific sort order passed in from java?

Question

Here\'s what I need to be able to do.

I have a List in java which I can convert to comma separate string of IDs like so \"3,4,5,6,1,2\"

I wonder if there\'s way

Answer 1

Something like this:

with ordered_ids as (
  select to_number(regexp_substr ('3,4,5,6,1,2','[^,]+',1,level)) as id, level as sort_order
  from dual
  connect by regexp_substr ('3,4,5,6,1,2','[^,]+',1,level) is not null
)
select t.id
from t_test t 
  join ordered_ids oi on oi.id = t.id
order by oi.sort_order;

You can probably make the literal '3,4,5,6,1,2' a parameter for a PreparedStatement but I haven't tested that.