Fix add_partial_path interaction with disabled_nodes Commit e22253467942fdb100087787c3e1e3a8620c54b2 adjusted the logic in add_path() to keep the path list sorted by disabled_nodes and then by total_cost, but failed to make the corresponding adjustment to add_partial_path. As a result, add_partial_path might sort the path list just by total cost, which could lead to later planner misbehavior.
In principle, this should be back-patched to v18, but we are typically reluctant to back-patch planner fixes for fear of destabilizing working installations, and it is unclear to me that this has sufficiently serious consequences to justify an exception, so for now, no back-patch. Reviewed-by: Richard Guo <[email protected]> Discussion: http://postgr.es/m/CAMbWs4-mO3jMK4t_LgcJ+7Eo=nmggkxettgravbjzzvvz1k...@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/6e466e1e839e2d40b30af9cbda107af867d259f6 Modified Files -------------- src/backend/optimizer/util/pathnode.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)
