Getting unsupported subquery type when trying to insert into a table - insert

Question

I have a query as follows:
INSERT ALL
WHEN NEWEST_ID IS NOT NULL AND
(SELECT COUNT(1) FROM (
SELECT *
FROM MY_TABLE
WHERE ID = NEWEST_ID
QUALIFY ROW_NUMBER() OVER (PARTITION BY ID ORDER BY OFFSET DESC) = 1
)
WHERE ACTIVE) = 0 THEN
INTO MY_TABLE VALUES(
NEWEST_ID,
CURRENT_DATE,
NAME,
FALSE
)
SELECT * FROM TEST_TABLE;
However I am getting an unsupported subquery type error when I try to write the select count(1) or count(*) from the subquery. Why is this so?/ How can I change this? In my subquery I am just trying to get the first row in a group of IDs after ordering by the descending offset. And then I am trying to determine whether the ACTIVE column from that result row is TRUE.

Answer 1

the QUALIFY can have the WHERE ACTIVE added to it:
SELECT COUNT(1)
FROM (
SELECT 1
FROM MY_TABLE as x
WHERE x.ID = NEWEST_ID
QUALIFY ROW_NUMBER() OVER (PARTITION BY x.ID ORDER BY x.OFFSET DESC) = 1 AND x.ACTIVE
)
this the inner only keeps the "last" offset per id AND if it is also active
the count = 0 can be turned into a NOT EXIST like:
INSERT ALL
WHEN newest_id IS NOT NULL
AND NOT EXISTS (
SELECT 1
FROM my_table AS x
WHERE x.id = newest_id
QUALIFY ROW_NUMBER() OVER (PARTITION BY x.id ORDER BY x.offset desc) = 1 AND x.active
) THEN
INTO my_table VALUES( newest_id, current_date, name, false)
SELECT * FROM TEST_TABLE;
"in theory"
the other option is to push that into a CTE:
WITH last_id_active AS (
SELECT x.id
FROM my_table AS x
QUALIFY
ROW_NUMBER() OVER (PARTITION BY x.id ORDER BY x.offset desc) = 1
AND x.active
)
which would need to be on the SELECT like:
INSERT ALL
WHEN tt.newest_id IS NOT NULL
AND lia.id IS NOT NULL THEN
INTO my_table VALUES( tt.newest_id, tt.current_date, tt.name, false)
WITH last_id_active AS (
SELECT x.id
FROM my_table AS x
QUALIFY
ROW_NUMBER() OVER (PARTITION BY x.id ORDER BY x.offset desc) = 1
AND x.active
)
SELECT * FROM TEST_TABLE as tt
LEFT JOIN last_id_active as lia
ON tt.newest_id = lia.id;
*based on theory
which could also be simplyfied, as lia.id will be null when tt.newest_id is also null, thus the INSERT_ALL could be simplefied more as:
INSERT ALL
WHEN lia.id IS NOT NULL THEN
INTO my_table VALUES( tt.newest_id, tt.current_date, tt.name, false)
WITH last_id_active AS (
SELECT x.id
FROM my_table AS x
QUALIFY
ROW_NUMBER() OVER (PARTITION BY x.id ORDER BY x.offset desc) = 1
AND x.active
)
SELECT * FROM TEST_TABLE as tt
LEFT JOIN last_id_active as lia
ON tt.newest_id = lia.id;