The following bug has been logged on the website:
Bug reference: 16828
Logged by: Thomas Kellerer
Email address: shammat(at)gmx(dot)net
PostgreSQL version: 13.1
Operating system: Windows 10, CentOS 8
Description:
The following query
select jsonb_path_query_array(col, '$.**.itemName')
from (
values ('{"items": [{"itemName": "a", "items": [{"itemName":
"b"}]}]}'::jsonb)
) as t(col)
returns ["a", "a", "b", "b"] but should return only ["a", "b"] as each value
only appears once in the JSON value.
This also happens on Postgres 12.x