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MDEV-13995 MAX(timestamp) returns a wrong result near DST change

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This commit is contained in:
Alexander Barkov
2018-12-08 19:39:23 +04:00
parent 5b3db87134
commit 34eb98387f
26 changed files with 1850 additions and 16 deletions
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167
mysql-test/main/timezone2.test
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@ -324,6 +324,173 @@ SELECT CONVERT_TZ(TIME('2010-01-01 00:00:00'),'+00:00','+7:5');
SET old_mode=DEFAULT;
SET timestamp=DEFAULT;
--echo #
--echo # MDEV-13995 MAX(timestamp) returns a wrong result near DST change
--echo #
# MAX()
SET time_zone='+00:00';
CREATE TABLE t1 (a TIMESTAMP);
INSERT INTO t1 VALUES (FROM_UNIXTIME(1288477526) /*summer time in Moscow*/);
INSERT INTO t1 VALUES (FROM_UNIXTIME(1288477526+3599) /*winter time in Moscow*/);
SET time_zone='Europe/Moscow';
SELECT a, UNIX_TIMESTAMP(a) FROM t1;
SELECT UNIX_TIMESTAMP(MAX(a)) AS a FROM t1;
CREATE TABLE t2 (a TIMESTAMP);
INSERT INTO t2 SELECT MAX(a) AS a FROM t1;
SELECT a, UNIX_TIMESTAMP(a) FROM t2;
DROP TABLE t2;
DROP TABLE t1;
# Comparison
SET time_zone='+00:00';
CREATE TABLE t1 (a TIMESTAMP);
CREATE TABLE t2 (a TIMESTAMP);
INSERT INTO t1 VALUES (FROM_UNIXTIME(1288477526) /*summer time in Moscow*/);
INSERT INTO t2 VALUES (FROM_UNIXTIME(1288477526+3599) /*winter time in Moscow*/);
SET time_zone='Europe/Moscow';
SELECT UNIX_TIMESTAMP(t1.a), UNIX_TIMESTAMP(t2.a) FROM t1,t2;
SELECT * FROM t1,t2 WHERE t1.a < t2.a;
DROP TABLE t1,t2;
# SP variable comparison
DELIMITER $$;
BEGIN NOT ATOMIC
DECLARE a,b TIMESTAMP;
SET time_zone='+00:00';
SET a=FROM_UNIXTIME(1288477526);
SET b=FROM_UNIXTIME(1288481125);
SELECT a < b;
SET time_zone='Europe/Moscow';
SELECT a < b;
END;
$$
DELIMITER ;$$
# SP function comparison
DELIMITER $$;
CREATE OR REPLACE FUNCTION f1(uts INT) RETURNS TIMESTAMP
BEGIN
DECLARE ts TIMESTAMP;
DECLARE tz VARCHAR(64) DEFAULT @@time_zone;
SET time_zone='+00:00';
SET ts=FROM_UNIXTIME(uts);
SET time_zone=tz;
RETURN ts;
END;
$$
DELIMITER ;$$
SET time_zone='+00:00';
SELECT f1(1288477526) < f1(1288481125);
SET time_zone='Europe/Moscow';
SELECT f1(1288477526) < f1(1288481125);
DROP FUNCTION f1;
# LEAST()
CREATE TABLE t1 (a TIMESTAMP,b TIMESTAMP);
SET time_zone='+00:00';
INSERT INTO t1 VALUES (FROM_UNIXTIME(1288477526) /*summer time in Mowcow*/,
FROM_UNIXTIME(1288481125) /*winter time in Moscow*/);
SELECT *, LEAST(a,b) FROM t1;
SET time_zone='Europe/Moscow';
SELECT *, LEAST(a,b) FROM t1;
SELECT UNIX_TIMESTAMP(a), UNIX_TIMESTAMP(b), UNIX_TIMESTAMP(LEAST(a,b)) FROM t1;
DROP TABLE t1;
# BETWEEN
CREATE TABLE t1 (a TIMESTAMP,b TIMESTAMP,c TIMESTAMP);
SET time_zone='+00:00';
INSERT INTO t1 VALUES (
FROM_UNIXTIME(1288477526) /*summer time in Moscow*/,
FROM_UNIXTIME(1288481125) /*winter time in Moscow*/,
FROM_UNIXTIME(1288481126) /*winter time in Moscow*/);
SELECT b BETWEEN a AND c FROM t1;
SET time_zone='Europe/Moscow';
SELECT b BETWEEN a AND c FROM t1;
DROP TABLE t1;
# ORDER BY
SET time_zone='+00:00';
CREATE TABLE t1 (a TIMESTAMP);
INSERT INTO t1 VALUES (FROM_UNIXTIME(1288477526) /*summer time in Mowcow*/);
INSERT INTO t1 VALUES (FROM_UNIXTIME(1288481125) /*winter time in Moscow*/);
SELECT a, UNIX_TIMESTAMP(a) FROM t1 ORDER BY a;
SELECT COALESCE(a) AS a, UNIX_TIMESTAMP(a) FROM t1 ORDER BY a;
SET time_zone='Europe/Moscow';
SELECT a, UNIX_TIMESTAMP(a) FROM t1 ORDER BY a;
SELECT COALESCE(a) AS a, UNIX_TIMESTAMP(a) FROM t1 ORDER BY a;
DROP TABLE t1;
# GROUP BY
SET time_zone='+00:00';
CREATE TABLE t1 (a TIMESTAMP);
INSERT INTO t1 VALUES (FROM_UNIXTIME(1288477526) /*summer time in Mowcow*/);
INSERT INTO t1 VALUES (FROM_UNIXTIME(1288481126) /*winter time in Moscow*/);
SET time_zone='Europe/Moscow';
SELECT a, UNIX_TIMESTAMP(a) FROM t1 GROUP BY a;
DROP TABLE t1;
# CASE
SET time_zone='+00:00';
CREATE TABLE t1 (a TIMESTAMP, b TIMESTAMP);
INSERT INTO t1 VALUES (FROM_UNIXTIME(1288477526),FROM_UNIXTIME(1288481126));
SELECT UNIX_TIMESTAMP(a),UNIX_TIMESTAMP(b),CASE a WHEN b THEN 'eq' ELSE 'ne' END AS x FROM t1;
SET time_zone='Europe/Moscow';
SELECT UNIX_TIMESTAMP(a),UNIX_TIMESTAMP(b),CASE a WHEN b THEN 'eq' ELSE 'ne' END AS x FROM t1;
DROP TABLE t1;
# IN
SET time_zone='+00:00';
CREATE TABLE t1 (a TIMESTAMP, b TIMESTAMP,c TIMESTAMP);
INSERT INTO t1 VALUES (FROM_UNIXTIME(1288477526),FROM_UNIXTIME(1288481126),FROM_UNIXTIME(1288481127));
SELECT UNIX_TIMESTAMP(a),UNIX_TIMESTAMP(b),a IN (b,c) AS x FROM t1;
SET time_zone='Europe/Moscow';
SELECT UNIX_TIMESTAMP(a),UNIX_TIMESTAMP(b),a IN (b,c) AS x FROM t1;
DROP TABLE t1;
# Comparison and IN in combination with a subquery (with one row)
SET time_zone='+00:00';
CREATE TABLE t1 (a TIMESTAMP, b TIMESTAMP);
INSERT INTO t1 VALUES (FROM_UNIXTIME(1288477526),FROM_UNIXTIME(1288481126));
SELECT * FROM t1 WHERE a = (SELECT MAX(b) FROM t1);
SELECT * FROM t1 WHERE a = (SELECT MIN(b) FROM t1);
SELECT * FROM t1 WHERE a IN ((SELECT MAX(b) FROM t1), (SELECT MIN(b) FROM t1));
SET time_zone='Europe/Moscow';
SELECT * FROM t1 WHERE a = (SELECT MAX(b) FROM t1);
SELECT * FROM t1 WHERE a = (SELECT MIN(b) FROM t1);
SELECT * FROM t1 WHERE a IN ((SELECT MAX(b) FROM t1), (SELECT MIN(b) FROM t1));
DROP TABLE t1;
# Comparison and IN in combinarion with a subquery (with multiple rows)
SET time_zone='+00:00';
CREATE TABLE t1 (a TIMESTAMP, b TIMESTAMP);
INSERT INTO t1 VALUES (FROM_UNIXTIME(1100000000),FROM_UNIXTIME(1200000000));
INSERT INTO t1 VALUES (FROM_UNIXTIME(1100000001),FROM_UNIXTIME(1200000001));
INSERT INTO t1 VALUES (FROM_UNIXTIME(1288477526),FROM_UNIXTIME(1288481126));
INSERT INTO t1 VALUES (FROM_UNIXTIME(1300000000),FROM_UNIXTIME(1400000000));
INSERT INTO t1 VALUES (FROM_UNIXTIME(1300000001),FROM_UNIXTIME(1400000001));
SELECT * FROM t1 WHERE a = (SELECT MAX(b) FROM t1);
SELECT * FROM t1 WHERE a = (SELECT MIN(b) FROM t1);
SELECT * FROM t1 WHERE a IN ((SELECT MAX(b) FROM t1), (SELECT MIN(b) FROM t1));
SET time_zone='Europe/Moscow';
SELECT * FROM t1 WHERE a = (SELECT MAX(b) FROM t1);
SELECT * FROM t1 WHERE a = (SELECT MIN(b) FROM t1);
SELECT * FROM t1 WHERE a IN ((SELECT MAX(b) FROM t1), (SELECT MIN(b) FROM t1));
DROP TABLE t1;
--echo #
--echo # End of 10.4 tests
--echo #