UPD:
I want to convert this Oracle code:
select lpad(c4, length(c4) + (level*2)-2 , ' '), lpad(c2, length(c2) + (level*2)-2 , ' ')
from (select root_id c1, root_tab_col_name c2, null c3, 'root_table' c4 from root_table
union all
select second_tab_id, second_tab_col_name, root_tab_id, 'second_table' from second_table
union all
select third_tab_id, third_tab_col_name, second_tab_id, 'third_table' from third_table)
start with c3 is null
connect by prior c1 = c3;
to PostgreSQL form. Could someone help me? With regards.
UPD:
I have 3 tables connected with foreign keys:
Result of this query:
try this :
with request_base as (
select root_id c1, root_tab_col_name c2, null c3, 'root_table' c4 from root_table
union all
select second_tab_id, second_tab_col_name, root_tab_id, 'second_table' from second_table
union all
select third_tab_id, third_tab_col_name, second_tab_id, 'third_table' from third_table
)
,req2 as (WITH recursive recurs1(tables_name,texts,n) as (
select c4,c2,c1 rel from request_base where c3 is null
UNION
select c4,c2,c1 from request_base,recurs1 where c3=n
)
select tables_name,texts from recurs1
)
select * from req2