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_4_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/111fb7e42e335bbe104939418ec44c903d3b2329 Modified Files -------------- src/backend/access/gist/gistscan.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
