6 lines
262 B
SQL
6 lines
262 B
SQL
ALTER TABLE tasks ADD COLUMN reference_id TEXT DEFAULT '';
|
|
ALTER TABLE tasks ALTER COLUMN reference_id SET NOT NULL;
|
|
ALTER TABLE tasks ALTER COLUMN reference_id DROP DEFAULT;
|
|
|
|
ALTER TABLE tasks ADD CONSTRAINT tasks_reference_id_unique UNIQUE (id, reference_id);
|