如何在postgres中过滤json的嵌套键值

Question

I have a table in PostgreSQL

CREATE TABLE IF NOT EXISTS account_details
(
    account_id integer,
    condition json
)

And the data's present inside this table are

account_id	condition
1	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[35,20,5,6]}}}]
2	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[1,4,2,3]}}}]
3	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[5]}}}]
4	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[1,2,3,5]}}}]
5	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[3,4]}}}]
6	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[4]}}}]
7	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[3]}}}]

I need to fetch part of values present inside rootcompanyid

Please guide me how to filter nested JSON data

Expected Output

Case: 1

Whenever I pass input rootcompanyid = 5 to the below query, it should filter out account_id 1,3 and 4 details

SELECT *
  FROM account_details
 WHERE ((condition->0->>'conditions')::json->>'rootcompanyid')::json->>'$in' = 5;

account_id	condition
1	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[35,20, 5 ,6]}}}]
3	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[ 5 ]}}}]
4	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[1,2,3, 5 ]}}}]

Case: 2

Whenever I pass input rootcompanyid = 3,4 to the below query, it should filter out account_id 2,4,5,6 and 7 details

SELECT *
  FROM account_details
 WHERE ((condition->0->>'conditions')::json->>'rootcompanyid')::json->>'$in' = 3,4;

account_id	condition
2	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[1, 4 ,2, 3 ]}}}]
4	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[1,2, 3 ,5]}}}]
5	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[ 3 , 4 ]}}}]
6	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[ 4 ]}}}]
7	[{"action":"read","subject":"rootcompany","conditions":{"rootcompanyid":{"$in":[ 3 ]}}}]

Please give me the best solution to filter partial and matching rootcompanyid in JSON format

Answer 1

You need to compare the element in the nested json . Here is an example:

SELECT *
  FROM account_details
 WHERE ((condition->0->>'conditions')::json->>'rootcompanyid')::json->>'$in' = '[35,20,5,6]';

condition->0 - first element of array

->>'conditions')::json - extract conditions from first element of array

->>'rootcompanyid')::json - extract rootcompanyid from conditions

::json->>'$in' - extract $in from rootcompanyid (id's of rootcompanyid )

Search by action:

SELECT *
  FROM account_details
 WHERE condition->0->>'action' = 'read';

Updated

To search specific id in json array you can use @> operator:

SELECT *
  FROM account_details
 WHERE ((((condition->0->>'conditions')::json->>'rootcompanyid')::json->>'$in')::jsonb) @> '[3,1]'::jsonb

Or LIKE :

SELECT *
  FROM account_details
 WHERE ((condition->0->>'conditions')::json->>'rootcompanyid')::json->>'$in' LIKE '%5%';

Updated v2

You can use json_array_elements_text + exists :

WITH parsed_conditions AS (
    SELECT account_id,
           json_array_elements_text(
               (((condition -> 0 ->> 'conditions')::json ->> 'rootcompanyid')::json ->>'$in')::json
           ) AS json_id
      FROM account_details
)

SELECT *
  FROM account_details AS a
 WHERE exists(
    SELECT DISTINCT account_id
      FROM parsed_conditions
     WHERE json_id IN ('3', '1')
       AND parsed_condidtions.account_id = a.account_id
);