hi again, after playing a while with PG, here is a SQL statement that outputs the expected result
SELECT groups_recursive.id AS groups_recursive_id, groups_recursive.name AS groups_recursive_name, groups_recursive.display_name AS groups_recursive_display_name FROM groups_recursive JOIN (WITH RECURSIVE all_parents(id, rank) AS ( SELECT groups_recursive.id AS groups_recursive_id, 1 FROM groups_recursive, groups_recursive_parents__groups_recursive_children WHERE groups_recursive_parents__groups_recursive_children.children_id = 4 AND groups_recursive_parents__groups_recursive_children.parents_id = groups_recursive.id UNION SELECT groups_recursive.id, rank+1 FROM all_parents, groups_recursive, groups_recursive_parents__groups_recursive_children WHERE groups_recursive_parents__groups_recursive_children.children_id = all_parents.id AND groups_recursive_parents__groups_recursive_children.parents_id = groups_recursive.id ) SELECT * FROM all_parents) AS anon_1 ON anon_1.id = groups_recursive.id; and FYI, here is what the code is issuing (not functionnal) SELECT groups_recursive.id AS groups_recursive_id FROM groups_recursive JOIN (WITH RECURSIVE all_parents(id, rank) AS ( (SELECT groups_recursive.id AS id, "1" FROM groups_recursive_parents__groups_recursive_children WHERE groups_recursive.id = groups_recursive_parents__groups_recursive_children.parents_id AND groups_recursive_parents__groups_recursive_children.children_id = :groupid UNION SELECT groups_recursive.id AS id, rank + :rank_1 AS anon_2 FROM groups_recursive_parents__groups_recursive_children WHERE groups_recursive_parents__groups_recursive_children.children_id = id AND groups_recursive_parents__groups_recursive_children.parents_id = groups_recursive.id) ) SELECT * FROM all_parents) AS anon_1 ON anon_1.id = groups_recursive.id we have problems such as column "1" does not exists if we add groups_recursive in both FROM clauses regards Nil -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To view this discussion on the web visit https://groups.google.com/d/msg/sqlalchemy/-/cTkUMo18h_IJ. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.