Hi, testing with sqlsmith on master at 3df51ca8b3 produced one instance of the following error:
ERROR: failed to build any 6-way joins I can reproduce it on a fresh regression database with the query below. These were last logged in 2015. Back then, it resulted in this commit: http://git.postgresql.org/pg/commitdiff/cfe30a72fa80528997357cb0780412736767e8c4 regards, Andreas select * from (select sample_1.a as c0 from fkpart5.fk2 as sample_1) as subq_0, lateral (select 1 from (select subq_0.c0 as c3, subq_5.c0 as c7, sample_2.b as c9 from public.brin_test as sample_2, lateral (select subq_3.c1 as c0 from fkpart5.pk3 as sample_3, lateral (select sample_2.a as c0, sample_3.a as c1 from public.rtest_interface as ref_0 ) as subq_1, lateral (select subq_1.c1 as c1 from public.alter_table_under_transition_tables as ref_1 ) as subq_3 ) as subq_5) as subq_6 right join public.gtest30_1 as sample_6 on (true) where subq_6.c7 = subq_6.c3) as subq_7;