DROP TABLE IF EXISTS test;
CREATE TABLE test (id String, `abc.1` String, `abc.2` String, `abc` String) ENGINE MergeTree order by id;
DESC TABLE test;
ALTER TABLE test MODIFY COLUMN `abc.1` String AFTER `abc`;
DESC TABLE test;
ALTER TABLE test MODIFY COLUMN `abc.2` String AFTER `abc`;
DESC TABLE test;
ALTER TABLE test MODIFY COLUMN `abc` String AFTER `abc.2`;
DESC TABLE test;
ALTER TABLE test MODIFY COLUMN `abc` String AFTER `id`;
DESC TABLE test;
ALTER TABLE test MODIFY COLUMN `abc` String AFTER `abc.1`;
DESC TABLE test;
ALTER TABLE test DROP COLUMN `abc`;
DESC TABLE test;