drop table if exists dt64_monot_test; drop table if exists dt64_monot_test_string; CREATE TABLE dt64_monot_test(`date_time` DateTime64(3, 'Europe/Berlin'), `id` String) ENGINE = MergeTree PARTITION BY toDate(date_time, 'Europe/Berlin') ORDER BY date_time; insert into dt64_monot_test select toDateTime64('2020-01-01 00:00:00.000',3)+number , '' from numbers(10); SELECT count() FROM dt64_monot_test WHERE toDateTime(date_time) >= toDateTime('2020-01-01 00:00:00') SETTINGS force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time, 3) >= '2020-01-01 00:00:01.111' SETTINGS force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time, 3) >= '2020-01-01 00:00:00.000' SETTINGS force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,3) >= toDateTime64('2020-01-01 00:00:00.000001', 3) SETTINGS force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,3) >= toDateTime64('2020-01-01 00:00:00.000001', 3, 'Europe/Berlin') SETTINGS force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,3) >= toDateTime64('2020-01-01 00:00:00.000001',6) SETTINGS force_index_by_date = 1; -- { serverError 277} SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,3) >= toDateTime64('2020-01-01 00:00:00.000001',6, 'Europe/Berlin') SETTINGS force_primary_key = 1; -- { serverError 277} SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,3) >= toDateTime64('2020-01-01 00:00:00.000001',6) SETTINGS force_primary_key = 1; -- { serverError 277} SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,3) <= toDateTime64('2020-01-01 00:00:00.000001',3, 'Europe/Berlin') settings force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,3) <= toDateTime64('2020-01-01 00:00:00.000001',3) settings force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,3) = toDateTime64('2020-01-01 00:00:00.000000',6); SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,3) = toDateTime64('2020-01-01 00:00:00.000000',6, 'Europe/Berlin'); SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,6) = toDateTime64('2020-01-01 00:00:00.000000',6) settings force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,6) = toDateTime64('2020-01-01 00:00:00.000001',6, 'Europe/Berlin') settings force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,6) > toDateTime64('2020-01-01 00:00:00.000001',6, 'Europe/Berlin') settings force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,6) >= toDateTime64('2020-01-01 00:00:00.000001',6, 'Europe/Berlin') settings force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,6) >= toDateTime64('2020-01-01 00:00:00.000001',6) settings force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,0) >= toDateTime64('2020-01-01 00:00:00.000001',0, 'Europe/Berlin') settings force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,0) >= toDateTime64('2020-01-01 00:00:00.000001',0) settings force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,0) >= '2020-01-01 00:00:00' settings force_index_by_date = 1, force_primary_key = 1; SELECT count() FROM dt64_monot_test WHERE toDateTime64(date_time,0) >= '2020-01-01 00:00:01.1' settings force_index_by_date = 1, force_primary_key = 1; create table dt64_monot_test_string(date_time String, x String) Engine=MergeTree order by date_time; insert into dt64_monot_test_string select '2020-01-01 00:00', '' from numbers(1); insert into dt64_monot_test_string select '2020-01-01 00:00:00.000000' , '' from numbers(10); SELECT count() FROM dt64_monot_test_string WHERE toDateTime64(date_time,3) = '1970-01-01 00:00:00.000000000'; SELECT count() FROM dt64_monot_test_string WHERE toDateTime64(date_time,3) = '1970-01-01 00:00:00.000000001'; SELECT count() FROM dt64_monot_test_string WHERE toDateTime64(date_time,9) = '2020-01-01 00:00:00'; drop table dt64_monot_test; drop table dt64_monot_test_string;