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 ------ REL9_5_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/986319d467cfefaa54b5cb72e063e28b66f04d42 Modified Files -------------- src/backend/access/gist/gistscan.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
