Andy Fan <zhihui.fan1213@gmail.com> writes: > I do see the README says we support bushy plans and I also see bushy > plans in real life (for example tpc-h Q20) like below. However I don't know > how it is generated with the algorithm in join_search_one_lev since it > always > make_rels_by_clause_join with joinrel[1] which is initial_rels which is > baserel.
Hmm? Bushy plans are created by the second loop in join_search_one_level, starting about line 150 in joinrels.c.