ClickHouse/tests/queries/0_stateless/02737_session_timezone.sql

SET session_timezone = 'Абырвалг'; -- { serverError BAD_ARGUMENTS}

SELECT timezone(), timezoneOf(now()) SETTINGS session_timezone = 'Pacific/Pitcairn';

SET session_timezone = 'Asia/Novosibirsk';
SELECT timezone(), timezoneOf(now());

-- test simple queries
SELECT toDateTime(toDateTime('2022-12-12 23:23:23'), 'Europe/Zurich');
SELECT toDateTime64(toDateTime64('2022-12-12 23:23:23.123', 3), 3, 'Europe/Zurich') SETTINGS session_timezone = 'America/Denver';

-- subquery shall use main query's session_timezone
SELECT toDateTime(toDateTime('2022-12-12 23:23:23'), 'Europe/Zurich'), (SELECT toDateTime(toDateTime('2022-12-12 23:23:23'), 'Europe/Zurich') SETTINGS session_timezone = 'Europe/Helsinki') SETTINGS session_timezone = 'America/Denver';

-- test proper serialization
SELECT toDateTime('2002-12-12 23:23:23') AS dt, toString(dt) SETTINGS session_timezone = 'Asia/Phnom_Penh';
SELECT toDateTime64('2002-12-12 23:23:23.123', 3) AS dt64, toString(dt64) SETTINGS session_timezone = 'Asia/Phnom_Penh';

-- Create a table and test that DateTimes are processed correctly on insert
CREATE TABLE test_tz_setting (d DateTime('UTC')) Engine=Memory AS SELECT toDateTime('2000-01-01 00:00:00');
INSERT INTO test_tz_setting VALUES ('2000-01-01 01:00:00'); -- this is parsed using timezone from `d` column
INSERT INTO test_tz_setting VALUES (toDateTime('2000-01-02 02:00:00')); -- this is parsed using `session_timezone`

-- Test parsing in WHERE filter, shall have the same logic as insert
SELECT d FROM test_tz_setting WHERE d == '2000-01-01 01:00:00'; -- 1 row expected
SELECT d FROM test_tz_setting WHERE d == toDateTime('2000-01-01 02:00:00'); -- 0 rows expected

-- Cleanup table
DROP TABLE test_tz_setting SYNC;