I'm trying to craft SQL to invoke a sequence nextval once per grouped value.
This seems like a very unusual usage of nextval/sequences...
with cleanup as (
select DISTINCT e.ma, coalesce(e.pa, 'fix') as pa from ...
), compute as (
select ma, pa, nextval(...) from cleanup
)
select * from compute ... -- do whatever else you want
So far I have this:
with husb as( select e.ma, count(distinct coalesce(e.pa, nextval('egogen')::text)) as mates from emp_all_by3 e group by e.ma order by mates ) select mates, count(*) from husb group by mates order by mates desc;
Your "order by mates" in the CTE is totally pointless and wasting resources.
