agora inbox for pgsql-bugs@postgresql.org  

help / color / mirror / Atom feed

From: PG Bug reporting form <noreply@postgresql.org>
To: pgsql-bugs@lists.postgresql.org
Cc: theshallow27@gmail.com
Subject: BUG #19735: `jsonb_object_agg_unique_strict` drops a JSONB `null` value as if it were SQL NULL
Date: Fri, 02 Oct 2026 22:03:41 +0000
Message-ID: <19735-488819822dc79bca@postgresql.org> (raw)

The following bug has been logged on the website:

Bug reference:      19735
Logged by:          Shallow
Email address:      theshallow27@gmail.com
PostgreSQL version: 18.6
Operating system:   Linux
Description:        

The strict JSONB object aggregate omits a non-SQL-NULL `jsonb` datum whose
JSON
value is `null`. The corresponding non-strict JSONB aggregate and strict
JSON
aggregate preserve the key with a JSON null value. The aggregate
documentation
says that strict mode skips a value when the value is NULL; a JSONB `null`
value
is distinct from SQL NULL.

**Reproduction:**

```sql
SELECT jsonb_object_agg_unique_strict('a', 'null'::jsonb)::text,
       jsonb_object_agg_unique('a', 'null'::jsonb)::text,
       json_object_agg_unique_strict('a', 'null'::jsonb)::text;
```

**Actual result:**

```text
{} | {"a": null} | { "a" : null }
```

**Expected result:** The strict JSONB aggregate should skip SQL NULL values
but
preserve a JSONB datum containing JSON `null`, consistent with the other two
aggregate results.

Message-ID: <19735-488819822dc79bca@postgresql.org>
Permalink:  ../19735-488819822dc79bca@postgresql.org/
Also on:    postgresql.org/message-id/19735-488819822dc79bca@postgresql.org

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: pgsql-bugs@postgresql.org
  Cc: noreply@postgresql.org, pgsql-bugs@lists.postgresql.org, theshallow27@gmail.com
  Subject: Re: BUG #19735: `jsonb_object_agg_unique_strict` drops a JSONB `null` value as if it were SQL NULL
  In-Reply-To: <19735-488819822dc79bca@postgresql.org>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox