Add documentation mention that 7 != NULL also returns NULL.
Branch------master
Details-------http://git.postgresql.org/pg/commitdiff/ebbcba75b46699fe11e347e1250898ce7d01b6f2
Modified Files--------------doc/src/sgml/func.sgml | 4 ++--1 files changed, 2 insertions(+), 2 deletions(-)
