Create nested json in Snowflake - sql

Question

I am trying to create a nested json in Snowflake and have narrowed down the query like below where I have nested it on id. However, I want the nested json to also apply to the inner layer and I am finding it hard to get the right query for it.
WITH subquery AS (
SELECT id, placeId, actionId, resultValue
FROM my_table
)
SELECT id,
'{"resultValues": {' || listagg('"' || placeId || '": {"' || actionId || '": ' || resultValue || '}', ',') within group (order by placeId) || '}}' as nested_json
FROM subquery
GROUP BY id;
Below is how the current result is looking like for each id.
I am trying to get the actionId1 and actionId2 grouped under the placeId1 and placeId2 so that it looks like below. How do I get this done? Any ideas would be appreciated.

Answer 1

Meet FLATTEN() and LATERAL they like to hang out with OBJECT_AGG() who needs his own space via CTE's.
WITH CTE AS (
SELECT
parse_json(
' { "resultValues": [
{ "placeId1": { "actionId1": 1.1 } }, { "placeId1": { "actionId2": 1.2 } },
{ "placeId2": { "actionId1": 1.3 } }, { "placeId2":{ "actionId2": 1.4} } ] }'
) VOLIA
),
CTE2 AS (
SELECT
DISTINCT KIAORA.PATH KIAORA,
TE_REO.PATH TE_REO,
OBJECT_AGG(MAORI.PATH, MAORI.VALUE) OVER (PARTITION BY TE_REO.PATH) MAORI
FROM
CTE,
LATERAL FLATTEN(INPUT => VOLIA) KIAORA,
LATERAL FLATTEN(KIAORA.VALUE) HELLO,
LATERAL FLATTEN(HELLO.VALUE) TE_REO,
LATERAL FLATTEN (INPUT => TE_REO.VALUE) MAORI
)
SELECT
DISTINCT OBJECT_CONSTRUCT(
KIAORA,
ARRAY_CONSTRUCT(
OBJECT_AGG(TE_REO, MAORI) OVER (PARTITION BY KIAORA)
)
) ANSWER,
VOLIA
FROM
CTE2, CTE
after starting :