If you’re interested in MariaDB & MySQL and happen to be in Tokyo, do drop by the first ever MariaDB/MySQL Tokyo Meetup #1. It happens October 16 2012, from 18.00-20.00. It is graciously hosted at K.K.Ashisuto (HQ) Salon Space (2nd floor). We have maps in Japanese and English. See you there!READ MORE
There's innodb_large_prefix as a possible workaround, which is default in 10.2 https://t.co/URwAEaZcN7
The reason is because MariaDB imposes a maximum of 767 bytes for indexes, and 767 / 4 = 191 (rounded down).
The danger of no Primary Key when replicating in RBR (partial protection with MariaDB 10.1) https://t.co/M6mABJdkmn by @jfg956