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-rw-r--r--mysql-test/main/type_timestamp.test21
1 files changed, 21 insertions, 0 deletions
diff --git a/mysql-test/main/type_timestamp.test b/mysql-test/main/type_timestamp.test
index 661ec56a04f..a0f1f2c3d78 100644
--- a/mysql-test/main/type_timestamp.test
+++ b/mysql-test/main/type_timestamp.test
@@ -878,6 +878,27 @@ DROP TABLE t1;
SET timestamp=DEFAULT;
--echo #
+--echo # MDEV-27653 long uniques don't work with unicode collations
+--echo #
+
+CREATE TABLE t1 (a timestamp, UNIQUE KEY(a) USING HASH);
+SET time_zone='+00:00';
+INSERT INTO t1 VALUES ('2001-01-01 10:20:30');
+SET time_zone='+01:00';
+--error ER_DUP_ENTRY
+INSERT INTO t1 SELECT MAX(a) FROM t1;
+SELECT * FROM t1;
+DROP TABLE t1;
+
+CREATE TABLE t1 (a timestamp, UNIQUE KEY(a) USING HASH);
+SET time_zone='+00:00';
+INSERT INTO t1 VALUES ('2001-01-01 10:20:30');
+SET time_zone='+01:00';
+CHECK TABLE t1;
+DROP TABLE t1;
+SET time_zone=DEFAULT;
+
+--echo #
--echo # End of 10.4 tests
--echo #