CREATE TABLE test_uddsketch ( `id` INT PRIMARY KEY, `value` DOUBLE, `ts` timestamp time index default now() ); INSERT INTO test_uddsketch (`id`, `value`) VALUES (1, 10.0), (2, 20.0), (3, 30.0), (4, 40.0), (5, 50.0), (6, 60.0), (7, 70.0), (8, 80.0), (9, 90.0), (10, 100.0); select uddsketch_calc(0.1, uddsketch_state(128, 0.01, `value`)) from test_uddsketch; select uddsketch_calc(0.5, uddsketch_state(128, 0.01, `value`)) from test_uddsketch; select uddsketch_calc(0.75, uddsketch_state(128, 0.01, `value`)) from test_uddsketch; select uddsketch_calc(0.95, uddsketch_state(128, 0.01, `value`)) from test_uddsketch; CREATE TABLE grouped_uddsketch ( `state` BINARY, id_group INT PRIMARY KEY, `ts` timestamp time index default now() ); INSERT INTO grouped_uddsketch (`state`, id_group) SELECT uddsketch_state(128, 0.01, `value`), `id`/5*5 as id_group FROM test_uddsketch GROUP BY id_group; SELECT uddsketch_calc(0.1, uddsketch_merge(128, 0.01, `state`)) FROM grouped_uddsketch; -- should fail SELECT uddsketch_calc(0.1, uddsketch_merge(128, 0.1, `state`)) FROM grouped_uddsketch; -- should fail SELECT uddsketch_calc(0.1, uddsketch_merge(64, 0.01, `state`)) FROM grouped_uddsketch; drop table test_uddsketch; drop table grouped_uddsketch;