--- test flush_table and compact_table ---
CREATE TABLE test(ts timestamp time index);

Affected Rows: 0

INSERT INTO test VALUES (1), (2), (3), (4), (5);

Affected Rows: 5

SELECT * FROM test;

+-------------------------+
| ts                      |
+-------------------------+
| 1970-01-01T00:00:00.001 |
| 1970-01-01T00:00:00.002 |
| 1970-01-01T00:00:00.003 |
| 1970-01-01T00:00:00.004 |
| 1970-01-01T00:00:00.005 |
+-------------------------+

ADMIN FLUSH_TABLE('test');

+---------------------------+
| ADMIN FLUSH_TABLE('test') |
+---------------------------+
| 0                         |
+---------------------------+

ADMIN COMPACT_TABLE('test');

+-----------------------------+
| ADMIN COMPACT_TABLE('test') |
+-----------------------------+
| 0                           |
+-----------------------------+

--- doesn't change anything ---
SELECT * FROM test;

+-------------------------+
| ts                      |
+-------------------------+
| 1970-01-01T00:00:00.001 |
| 1970-01-01T00:00:00.002 |
| 1970-01-01T00:00:00.003 |
| 1970-01-01T00:00:00.004 |
| 1970-01-01T00:00:00.005 |
+-------------------------+

DROP TABLE test;

Affected Rows: 0