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-rw-r--r--mysql-test/suite/innodb/t/alter_candidate_key.test3
1 files changed, 3 insertions, 0 deletions
diff --git a/mysql-test/suite/innodb/t/alter_candidate_key.test b/mysql-test/suite/innodb/t/alter_candidate_key.test
index 7429cd89a1a..979d8fa4fee 100644
--- a/mysql-test/suite/innodb/t/alter_candidate_key.test
+++ b/mysql-test/suite/innodb/t/alter_candidate_key.test
@@ -42,6 +42,9 @@ DROP TABLE t1;
SET SQL_MODE= strict_trans_tables;
CREATE TABLE t1(a INT UNIQUE) ENGINE=InnoDB;
+# MDEV-515 takes X-lock on the table for the first insert.
+# So concurrent insert won't happen on the table
+INSERT INTO t1 VALUES(3);
SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL dml WAIT_FOR dml_done';
--send ALTER TABLE t1 MODIFY COLUMN a INT NOT NULL
connection con1;