regexp_replace not respecting greediness

With the following regular expression, the second .* seems to match non-greedily although (if I am correct) it should match greedily:

postgres=# SELECT REGEXP_REPLACE('jane(dot)smith(at)example(dot)com', '(dot)*?(at)(dot)*', 'ab');
regexp_replace
----------------
abexample.com
(1 row)

Other database systems (e.g., DuckDB, Umbra) match the whole input: https://analytics.db.in.tum.de/?q=SELECT+REGEXP_REPLACE%28%27jane.smith%40example.com%27%2C+%27.*%3F%40.*%27%2C+%27ab%27%29%3B

Affected version: PostgreSQL 17.5 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 15.2.1 20250813, 64-bit

Cheers,
Simon

--

Research associate
Chair for database systems
Department of Informatics
TU München Tel: +49 89 289 17276
Boltzmannstr. 3 E-Mail: simon(dot)ellmann(at)tum(dot)de
D-85748 Garching bei München, Germany