Generate error for ALTER TABLE ADD ... AUTO_INCREMENT

[Aleksey Sanin]

If table is not empty, then adding a column with AUTO_INCREMENT will not produce correct results on Galera:

ALTER TABLE foo ADD `id` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT

because each node will get its own IDs. Probably it is better to generate an error if user tries to run this query.

[Alex Yurchenko (ayurchen)]

Duplicate of lp:587170. But returning an error is a good point.