Collect Recursive JSON Keys In Postgres

Question

I have JSON documents stored in Postgres under the JSON data type (Postgres 9.3) and I need to recursively collect the key names down the tree.

For example, given th

Answer 1

A little more concise version that you can just test with:

WITH RECURSIVE reports (key, value) AS (
  SELECT
    NULL as key,
    '{"k1": {"k2": "v1"}, "k3": {"k4": "v2"}, "k5": "v3"}'::JSONB as value

UNION ALL

   SELECT
    jsonb_object_keys(value)as key,
    value->jsonb_object_keys(value) as value
   FROM
    reports
   WHERE
    jsonb_typeof(value) = 'object'
)

SELECT
    *
FROM
    reports;

This will return a list that you then need to group with distinct.