Summary:
Fixes T5840. Some time ago I incorrectly believed that `latin1_bin` collation was synonymous with "binary". It is not, and does not permit UTF8 characters outside of BMP, among other sequences.
These two tables currently have `LONGTEXT` columns which should be `LONGBLOB`. The table design is explicilty intended to accommodate invalid/unreasonably long ref names, but the collation prevents this from working properly.
After T1191, we'll have a general system for resolving this, but a user hit an issue yesterday (T5840) with a brnach name containing Chinese characters.
Test Plan:
- Tried emoji inserts into both tables, was rebuffed.
- Ran migration.
- Performed emoji inserts into both tables.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T5840
Differential Revision: https://secure.phabricator.com/D10217
