The ALTER TABLEs to run
Where to run those changes
- on the wikishared database
When to run those changes
- anytime
If the schema change is backwards compatible
- adds a new column which has a default value, so yes
If the schema change has been tested already on some of the test/beta wikis
- it has been tested on beta (aka deployment prep) and in cx-testing labs instances with no issues noted
If it involves new columns or tables, if the data should be made available on the labs replicas and/or dumps or not because they contain private or sensitive data:
- new column does not contain sensitive or private information