Sure, did you look in the documentation?
select
t3.id,
coalesce
(
t1.title,
t2.title,
t3.title
),
string_to_array(coalesce
(
case
when t1.title is not null
then 'table_one,'
else null
end,
case
when t2.title is not null
then 'table_two,'
else null
end,
''
) || 'table_three', ',')
from
table_three t3
left outer join table_two t2 using (id)
left outer join table_one t1 using (id)
On 10/15/2010 2:55 AM, Nick wrote:
Thanks Guy, is it possible to get the 3rd column result as an array
instead of string? -Nick
On Oct 14, 9:27 pm, guyr-...@xxxxxxxxxxxxx (Guy Rouillier) wrote:
Sure:
select
t3.id,
coalesce
(
t1.title,
t2.title,
t3.title
),
coalesce
(
case
when t1.title is not null
then 'table_one,'
else null
end,
case
when t2.title is not null
then 'table_two,'
else null
end,
''
) || 'table_three'
from
table_three t3
left outer join table_two t2 using (id)
left outer join table_one t1 using (id)
On 10/14/2010 8:13 PM, Nick wrote:
I guess I should mention that im basically searching for a way to
recusively coalesce the title. So I want to search the second table
and
table_one (id,title)
1 | new one
table_two (id,title)
2 | new two
table_three (id,title)
1 | one
2 | two
3 | three
Id like an sql statement that returns...
1 | new one | [table_one,table_three]
2 | new two | [table_two,table_three]
3 | three | [table_three]
On Oct 14, 4:49 pm, Nick<nboutel...@xxxxxxxxx> wrote:
Is it possible to get the results of this snip of a function without
using a function? All tables include an id and title column.
tables := ARRAY[table_one,table_two,table_three]::VARCHAR;
CREATE TEMP TABLE final_results (id INTEGER, title VARCHAR, r_types
VARCHAR[]);
FOR t IN ARRAY_LOWER(tables,1) .. ARRAY_UPPER(tables,1) LOOP
FOR r IN EXECUTE 'SELECT id, title FROM ' || tables[t] LOOP
IF (SELECT TRUE FROM final_results WHERE id = r.id LIMIT 1) THEN
UPDATE final_results SET r_types =
array_append(r_types,tables[t]) WHERE id = r.id;
ELSE
INSERT INTO final_results (id,title,r_types) VALUES
(r.id,r.title,ARRAY[tables.t]);
END LOOP;
END LOOP;
--
Guy Rouillier
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--
Guy Rouillier
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