ALTER TABLE: https://gerrit.wikimedia.org/r/c/mediawiki/core/+/620044/3/maintenance/archives/patch-sites-site_global_key.sql

ALTER TABLE sites MODIFY `site_global_key` varbinary(64) NOT NULL;

WHERE: All wikis with the site table (it should be every wiki database)
WHEN: At DBAs leisure; change isn't necessary for WMF production, but helps keep tables in sync with core schema changes
BACK COMPAT: Yes
TESTED: Not yet on beta, will be merged soon

Table on the wikis should be relatively small, ~1000 rows

Schema change progress:

• s1
• s2
• s3
• s4
• s5
• s6
• s7
• s8
• wikitech
• labtestwiki