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An extra test with NULLIF() for MDEV-13995 MAX(timestamp) returns a wrong result near DST change

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Alexander Barkov
2019-12-20 15:55:55 +04:00
parent 088de81d96
commit 5e0c80c2a5
2 changed files with 33 additions and 0 deletions
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17
mysql-test/main/timezone2.test
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@ -521,6 +521,23 @@ 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;
# NULLIF
SET time_zone='Europe/Moscow';
CREATE TABLE t1 (a TIMESTAMP);
CREATE TABLE t2 (a TIMESTAMP);
SET timestamp=1288479599 /*summer time in Mowcow*/;
INSERT INTO t1 VALUES (CURRENT_TIMESTAMP);
SET timestamp=1288479599+3600 /*winter time in Mowcow*/;
INSERT INTO t2 VALUES (CURRENT_TIMESTAMP);
SELECT t1.a, UNIX_TIMESTAMP(t1.a), t2.a, UNIX_TIMESTAMP(t2.a) FROM t1, t2;
SELECT NULLIF(t1.a, t2.a) FROM t1,t2;
DROP TABLE t1, t2;
SET time_zone=DEFAULT;
SET timestamp=DEFAULT;
--echo #
--echo # MDEV-17979 Assertion `0' failed in Item::val_native upon SELECT with timestamp, NULLIF, GROUP BY
--echo #