SET output_format_pretty_color=1; SET allow_experimental_analyzer = 1; select * from system.one cross join system.one; select * from system.one cross join system.one r; select * from system.one l cross join system.one; select * from system.one left join system.one using dummy; select dummy from system.one left join system.one using dummy; USE system; SELECT dummy FROM one AS A JOIN one ON A.dummy = one.dummy; SELECT dummy FROM one JOIN one AS A ON A.dummy = one.dummy; SELECT dummy FROM one l JOIN one r ON dummy = r.dummy; SELECT dummy FROM one l JOIN one r ON l.dummy = dummy; -- { serverError 403 } SELECT dummy FROM one l JOIN one r ON one.dummy = r.dummy; SELECT dummy FROM one l JOIN one r ON l.dummy = one.dummy; -- { serverError 403 } SELECT * from one JOIN one A ON one.dummy = A.dummy JOIN one B ON one.dummy = B.dummy FORMAT PrettyCompact; SELECT * from one A JOIN system.one one ON A.dummy = one.dummy JOIN system.one two ON A.dummy = two.dummy FORMAT PrettyCompact; -- SELECT one.dummy FROM one AS A FULL JOIN (SELECT 0 AS dymmy) AS one USING dummy; SELECT one.dummy FROM one AS A JOIN (SELECT 0 AS dummy) B USING dummy;