Have a great day!

Your work helped me to answer to some really tough questions.

Here’s the full statement (hope this preserves the formatting):

insert into aggregated_extent_map
select file_id, root, owner, segment_name, segment_type,
sum(blocks)
from
(
select owner, segment_name, segment_type, file_id,
blocks, block_id,
connect_by_root block_id root
from seg_list a
start with (file_id, block_id) in
(select file_id, block_id
from seg_list
where (file_id,block_id) in
(select file_id, min(block_id)
from seg_list group by file_id)
union all
select b.file_id, b.block_id
from seg_list a, seg_list b
where b.block_id = a.block_id + a.blocks
and a.file_id = b.file_id
and (a.owner b.owner or
a.segment_name b.segment_name)
)
connect by owner = prior owner
and segment_name = prior segment_name
and file_id = prior file_id
and block_id = prior a.block_id + prior a.blocks
) c
group by owner, segment_name, segment_type, file_id, root
;