The following bug has been logged on the website:
Bug reference: 18758
Logged by: Pisces Mar.
Email address: vectorplanck(at)gmail(dot)com
PostgreSQL version: 17.2
Operating system: window10
Description:
create table t1 (c1 char(50));
create table t2 (c1 integer);
select t1.c1 from t2, t1 group by rollup(t1.c1); -- actual: {null},
expected: {}