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Subject: BUG #19643: Output of jsonb_populate_recordset not consistent with
 documentation description
To: pgsql-bugs@lists.postgresql.org
From: PG Bug reporting form <noreply@postgresql.org>
Cc: yishundinesh@gmail.com
Reply-To: yishundinesh@gmail.com, pgsql-bugs@lists.postgresql.org
Date: Fri, 28 Aug 2026 12:42:44 +0000
Message-ID: <19643-eadf5dc7e134dd3e@postgresql.org>
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The following bug has been logged on the website:

Bug reference:      19643
Logged by:          Balaji Venkatesan
Email address:      yishundinesh@gmail.com
PostgreSQL version: 18.6
Operating system:   Ubuntu
Description:       =20

As per the documentation jsonb_populate_record  "Expands the object in
from_json to a row whose columns match the record type defined by base".
The example given the documentation is working fine, but if I replace
null::myrow with Row(('a'::text,'b'::text), the output discards
from_json(second argument completely)
First argument's value is being used instead of using it as a key

Eg:
select * from
jsonb_populate_recordset(ROW('a'::text,'b'::text),'[{"a":"test","b":"55"}]')
as (a text, b text)

Output::
a,b

Expected output:

test,55