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CREATE TABLE t1 (a INT, b VARCHAR(10)) ENGINE=InnoDB
PARTITION BY RANGE(a)
(PARTITION pa VALUES LESS THAN (3),
PARTITION pb VALUES LESS THAN (5));
INSERT INTO t1 VALUES(2,'two'),(2,'two'),(4,'four');
connect ddl,localhost,root,,test;
SET DEBUG_SYNC = 'inplace_after_index_build SIGNAL go WAIT_FOR done';
ALTER TABLE t1 ADD UNIQUE KEY (a,b(3));
connection default;
SET DEBUG_SYNC = 'now WAIT_FOR go';
BEGIN;
SELECT * FROM t1 FOR UPDATE;
a b
2 two
2 two
4 four
SET DEBUG_SYNC = 'now SIGNAL done';
connection ddl;
ERROR 23000: Duplicate entry '2-two' for key 'a'
connection default;
DELETE FROM t1;
disconnect ddl;
SET DEBUG_SYNC = 'RESET';
CHECK TABLE t1;
Table Op Msg_type Msg_text
test.t1 check status OK
DROP TABLE t1;
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