Add bms_prev_member function This works very much like the existing bms_last_member function, only it traverses through the Bitmapset in the opposite direction from the most significant bit down to the least significant bit. A special prevbit value of -1 may be used to have the function determine the most significant bit. This is useful for starting a loop. When there are no members less than prevbit, the function returns -2 to indicate there are no more members.
Author: David Rowley Discussion: https://postgr.es/m/CAKJS1f-K=3d5mdasnyfjpupc20xcbnawnc1-aoeunhn0otk...@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/5c0675215e153ba1297fd494b34af2fdebd645d1 Modified Files -------------- src/backend/nodes/bitmapset.c | 95 +++++++++++++++++++++++++++++++++++++++++++ src/include/nodes/bitmapset.h | 1 + 2 files changed, 96 insertions(+)