ALTER TABLE workflow ADD COLUMN from_repository TEXT DEFAULT '';

ALTER TABLE workflow ADD COLUMN derived_from_workflow_id BIGINT DEFAULT 0;

ALTER TABLE workflow ADD COLUMN derived_from_workflow_name TEXT DEFAULT '';

ALTER TABLE workflow ADD COLUMN derivation_branch TEXT DEFAULT '';

UPDATE workflow SET from_repository = '';

UPDATE workflow SET derived_from_workflow_id = 0;

UPDATE workflow SET derived_from_workflow_name = '';

UPDATE workflow SET derivation_branch = '';

ALTER TABLE workflow DROP COLUMN from_repository;

ALTER TABLE workflow DROP COLUMN derived_from_workflow_id;

ALTER TABLE workflow DROP COLUMN derived_from_workflow_name;

ALTER TABLE workflow DROP COLUMN derivation_branch;