From: | Andreas Seltenreich <seltenreich(at)gmx(dot)de> |
---|---|
To: | pgsql-hackers(at)lists(dot)postgresql(dot)org |
Subject: | [sqlsmith] Planner error on lateral joins |
Date: | 2020-11-29 18:40:50 |
Message-ID: | 87blfgqa4t.fsf@aurora.ydns.eu |
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Lists: | pgsql-hackers |
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;
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