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drop table if exists t1;
CREATE TABLE t1(
id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
k INT,
c CHAR(1),
UNIQUE KEY(k)) ENGINE=InnoDB;
connect con1, localhost, root;
connect con2, localhost, root;
connection con1;
SET DEBUG_SYNC='ha_write_row_end SIGNAL continue2 WAIT_FOR continue1';
affected rows: 0
INSERT INTO t1(k) VALUES (1), (2), (3) ON DUPLICATE KEY UPDATE c='1';
connection con2;
SET DEBUG_SYNC='ha_write_row_start WAIT_FOR continue2';
affected rows: 0
SET DEBUG_SYNC='after_mysql_insert SIGNAL continue1';
affected rows: 0
INSERT INTO t1(k) VALUES (2), (4), (5) ON DUPLICATE KEY UPDATE c='2';
affected rows: 3
info: Records: 3 Duplicates: 0 Warnings: 0
connection con1;
affected rows: 4
info: Records: 3 Duplicates: 1 Warnings: 0
SET DEBUG_SYNC='RESET';
SELECT * FROM t1 ORDER BY k;
id k c
1 1 NULL
4 2 1
2 3 NULL
5 4 NULL
6 5 NULL
disconnect con1;
disconnect con2;
connection default;
DROP TABLE t1;
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