Fix handling Inf and Nan values in GiST pairing heap comparator Previously plain float comparison was used in GiST pairing heap. Such comparison doesn't provide proper ordering for value sets containing Inf and Nan values. This commit fixes that by usage of float8_cmp_internal(). Note, there is remaining problem with NULL distances, which are represented as Inf in pairing heap. It would be fixes in subsequent commit.
Backpatch to all supported versions. Reported-by: Andrey Borodin Discussion: https://postgr.es/m/CAPpHfdsNvNdA0DBS%2BwMpFrgwT6C3-q50sFVGLSiuWnV3FqOJuQ%40mail.gmail.com Author: Alexander Korotkov Reviewed-by: Heikki Linnakangas Backpatch-through: 9.4 Branch ------ REL_10_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/8f724002e2fe0e415f5a603462440d2f297f287c Modified Files -------------- src/backend/access/gist/gistscan.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
