===Acceptance criteria===
- Create a new column to store the event country code (as obtained by the CLDR extension)
-- The new column should be in the `ce_address` table
-- The name of the column will be `cea_country_code`
-- Column type must be string of limit of 2
-- The column should be nullable to allow data migration (it may or may not remain nullable once the migration is over)
- The column is created (automatically) in beta
- The column is created in production
===[[https://wikitech.wikimedia.org/wiki/Schema_changes#Workflow_of_a_schema_change | Checklist ]] ===
[x] Design the schema
[x] Tag this task with #schema-change
[x] Make schema change patch for it
[x] Get initial reviews and DBA feedback
[] Merge the schema patch
-- This will automatically create the new table in beta
[] Wait until the patch reaches production
[] Create a subtask requesting the schema change in production, following instructions in https://wikitech.wikimedia.org/wiki/Schema_changes#Workflow_of_a_schema_change (3rd bullet)