ALTER TABLE scenarios
  ADD COLUMN input_schema JSON NULL AFTER created_by,
  ADD COLUMN output_schema JSON NULL AFTER input_schema;

UPDATE scenarios SET input_schema = JSON_OBJECT('fields', JSON_ARRAY()), output_schema = JSON_OBJECT('fields', JSON_ARRAY());
ALTER TABLE scenarios MODIFY input_schema JSON NOT NULL, MODIFY output_schema JSON NOT NULL;

ALTER TABLE scenario_fields
  ADD COLUMN source_path VARCHAR(255) NOT NULL DEFAULT '' AFTER field_name;

ALTER TABLE sop_runs
  ADD COLUMN external_ref VARCHAR(191) NULL AFTER operator_id,
  ADD COLUMN input JSON NULL AFTER answers,
  ADD COLUMN derived JSON NULL AFTER input,
  ADD COLUMN outputs JSON NULL AFTER derived;

UPDATE sop_runs SET input = answers, derived = JSON_OBJECT(), outputs = JSON_ARRAY();
ALTER TABLE sop_runs MODIFY input JSON NOT NULL, MODIFY derived JSON NOT NULL, MODIFY outputs JSON NOT NULL;

ALTER TABLE sop_runs ADD UNIQUE KEY uk_sop_runs_external_ref (tenant_id, sop_id, external_ref);