On 2026-02-13 Fr 3:18 PM, Tom Lane wrote:
PG Bug reporting form <noreply@postgresql.org> writes:
... this fails in PostgreSQL 18, because the jsonb_strip_nulls ( target
jsonb [,strip_in_arrays boolean ] ) function changed from immutable to
stable.
A bit of git excavation shows that this changed here:
Author: Andrew Dunstan <andrew@dunslane.net>
Branch: master Release: REL_18_BR [4603903d2] 2025-03-05 10:04:02 -0500
Allow json{b}_strip_nulls to remove null array elements An additional paramater ("strip_in_arrays") is added to these functions. It defaults to false. If true, then null array elements are removed as well as null valued object fields. JSON that just consists of a single null is not affected. Author: Florents Tselai <florents.tselai@gmail.com> Discussion: https://postgr.es/m/4BCECCD5-4F40-4313-9E98-9E16BEB0B01D@gmail.com
It looks like a thinko to me, because surely the strip_in_arrays
parameter did not make the function more mutable than before.
Nor did a quick search find any discussion of the point in the
thread.
Yeah. <paperbag>
In penance for this I have worked up a mechanism to generate default-setting statements from pg_proc.dat that I will post separately about in -hackers. In the meantime, I guess we should fix it in release 18 and master, with a release note that people might need to do a manual update if affected, along the lines of
update pg_proc set provolatile = 'i' where oid in (3261,3262);
cheers
andrew
--
Andrew Dunstan
EDB: https://www.enterprisedb.com
