Thread: pgsql: Fix line_construct_pm() for the case of "infinite" (DBL_MAX) slo
Fix line_construct_pm() for the case of "infinite" (DBL_MAX) slope. This code was just plain wrong: what you got was not a line through the given point but a line almost indistinguishable from the Y-axis, although not truly vertical. The only caller that tries to use this function with m == DBL_MAX is dist_ps_internal for the case where the lseg is horizontal; it would end up producing the distance from the given point to the place where the lseg's line crosses the Y-axis. That function is used by other operators too, so there are several operators that could compute wrong distances from a line segment to something else. Per bug #5745 from jindiax. Back-patch to all supported branches. Branch ------ REL8_4_STABLE Details ------- http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=5abb72f9af64339ed97eb991b0bd3456bd651f8e Modified Files -------------- src/backend/utils/adt/geo_ops.c | 15 +++++++++++---- 1 files changed, 11 insertions(+), 4 deletions(-)