Florian Pritz authored Apr 15, 2017 and Lukas Fleischer committed Apr 16, 2017

>From the mysql 5.7 breaking change page:

Columns in a PRIMARY KEY must be NOT NULL, but if declared explicitly as
NULL produced no error. Now an error occurs. For example, a statement
such as CREATE TABLE t (i INT NULL PRIMARY KEY) is rejected. The same
occurs for similar ALTER TABLE statements. (Bug #13995622, Bug #66987,
Bug #15967545, Bug #16545198)

References:
http://stackoverflow.com/a/22314073



Signed-off-by: Florian Pritz <bluewind@xinu.at>
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>