Type:
Bug
Priority:
Major
Resolution:
Unresolved
Affects Version/s:
11.1.1 , 11.2(EOL) , 11.4 , 11.6(EOL) , 11.7(EOL)
--source include/have_partition.inc
CREATE TABLE t (a INT , f BLOB, s date , e date , PERIOD FOR p(s,e), UNIQUE KEY f (f))
ENGINE=MyISAM PARTITION BY KEY (a) PARTITIONS 2;
INSERT INTO t VALUES
(1, 'foo' , '1980-01-01' , '2000-01-02' ),(1, 'bar' , '1980-00-01' , '2000-01-02' );
--error ER_DUP_ENTRY
UPDATE t FOR PORTION OF p FROM '1990-01-01' TO '2000-01-02' SET a = 100;
SELECT * FROM t;
# Cleanup
DROP TABLE t;
Until 11.1 UPDATE returned the ER_DUP_ENTRY , which is expected as it splits the existing periods without modifying the unique key.
In newer versions it succeeds, and duplicate records are indeed created.
11.4 3f114a09306f85dbe3ce00ad268b8d36ef24a1d1
mysqltest: At line 9: query 'UPDATE t FOR PORTION OF p FROM ' 1990-01-01 ' TO ' 2000-01-02 ' SET a = 100' succeeded - should have failed with error ER_DUP_ENTRY (1062)...
...
SELECT * FROM t;
a f s e
1 foo 1980-01-01 1990-01-01
1 bar 1980-00-01 1990-01-01
100 foo 1990-01-01 2000-01-02
100 bar 1990-01-01 2000-01-02
The failure appears to be specific to partitioning.
The problem appeared after a set of commits related to MDEV-28883 / MDEV-7487 (3a9358a4106 - 554278e24db). I can't bisect more precisely as they either don't build or crash upon bootstrap already.
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