DROP TABLE IF EXISTS t;
CREATE TABLE t (x UInt8, PROJECTION p (SELECT x GROUP BY x)) ENGINE = MergeTree ORDER BY ();
INSERT INTO t VALUES (0);
SET group_by_overflow_mode = 'any', max_rows_to_group_by = 1000, totals_mode = 'after_having_auto';
SELECT x FROM t GROUP BY x WITH TOTALS;

SET optimize_aggregation_in_order=1;
SELECT x FROM t GROUP BY x WITH TOTALS;

DROP TABLE t;