ALTER TABLE users RENAME TO people; ALTER TABLE IF EXISTS users RENAME TO people; ALTER TABLE users ADD COLUMN zip varchar; ALTER TABLE IF EXISTS users ADD COLUMN IF NOT EXISTS zip varchar; ALTER TABLE users DROP COLUMN zip; ALTER TABLE IF EXISTS users DROP COLUMN IF EXISTS zip; ALTER TABLE users RENAME COLUMN id TO user_id; ALTER TABLE IF EXISTS users RENAME column IF EXISTS id to user_id; ALTER TABLE people SET AUTHORIZATION alice; ALTER TABLE people SET AUTHORIZATION ROLE PUBLIC; ALTER TABLE people SET PROPERTIES x = 'y'; ALTER TABLE people SET PROPERTIES foo = 123, "foo bar" = 456; ALTER TABLE people SET PROPERTIES x = DEFAULT; ALTER TABLE hive.schema.test_table EXECUTE optimize(file_size_threshold => '10MB');