CREATE EXTENSION tsm_system_time;
CREATE TABLE test_tablesample (id int, name text);
INSERT INTO test_tablesample SELECT i, repeat(i::text, 1000)
  FROM generate_series(0, 30) s(i);
EXPLAIN (COSTS OFF)
SELECT * FROM
  (VALUES (0),(100000)) v(time),
  LATERAL (SELECT COUNT(*) FROM test_tablesample
           TABLESAMPLE system_time (time)) ss;
                                 QUERY PLAN                                 
----------------------------------------------------------------------------
 Nested Loop
   ->  Values Scan on "*VALUES*"
   ->  Aggregate
         ->  Remote Subquery Scan on all (datanode_1,datanode_2)
               ->  Aggregate
                     ->  Materialize
                           ->  Sample Scan on test_tablesample
                                 Sampling: system_time ("*VALUES*".column1)
(8 rows)

SELECT * FROM
  (VALUES (0),(100000)) v(time),
  LATERAL (SELECT COUNT(*) FROM test_tablesample
           TABLESAMPLE system_time (time)) ss;
  time  | count 
--------+-------
      0 |     0
 100000 |    31
(2 rows)

DROP TABLE test_tablesample;
DROP EXTENSION tsm_system_time;  -- fail, view depends on extension