Fix broken MemoizePath support in reparameterize_path(). It neglected to recurse to the subpath, meaning you'd get back a path identical to the input. This could produce wrong query results if the omission meant that the subpath fails to enforce some join clause it should be enforcing. We don't have a test case for this at the moment, but the code is obviously broken and the fix is equally obvious. Back-patch to v14 where Memoize was introduced.
Richard Guo Discussion: https://postgr.es/m/CAMbWs4_R=ORpz=lkn2q3ebpc5euwyfzf+tmfcpvlbvk5w39...@mail.gmail.com Branch ------ REL_14_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/ce093aa18062f64d5eb16175e361cc34a222c1db Modified Files -------------- src/backend/optimizer/util/pathnode.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
