SQL & PL/SQL

Hello,

I have a query that returns quarters (YYYYQ) of a begin- and enddate within a specific id, that is built with a connect by level clause, but the query is running to long. I have used explain plan to see what the query is doing, but no silly things to see, just a full table scan, with low costs.

This is the query:

select to_char(add_months( cpj.crpj_start_date,3*(level - 1)),'YYYYQ') as sales_quarter
, cpj.crpj_id as crpj_id
from mv_gen_cra_projects cpj
where cpj.crpj_start_date >= to_date('01/01/2009','mm/dd/yyyy')
and cpj.crpj_start_date <= cpj.crpj_end_date
and cpj.crpj_routing_type = 'A'
and ( cpj.crpj_multi_artist_ind = 'N'
or cpj.crpj_multi_artist_ind is null)
connect by level <= 1 + ceil(months_between(cpj.crpj_end_date,cpj.crpj_start_date)/3);

The result have to be like this:

SALES_QUARTER CRPJ_ID
----------------------- -----------
20091 100
20092 100
20093 100
20094 100
20101 100
20102 100

Can anyone help me out with this?