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set global transaction isolation level repeatable read;
CREATE TABLE t1(
id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
k INT,
c CHAR(1),
UNIQUE KEY(k)) ENGINE=InnoDB;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`k` int(11) DEFAULT NULL,
`c` char(1) DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `k` (`k`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
#
# Sequential execution
#
INSERT INTO t1(k) VALUES (1), (2), (3) ON DUPLICATE KEY UPDATE c='1';
affected rows: 3
info: Records: 3 Duplicates: 0 Warnings: 0
#
# 1 duplicate
#
INSERT INTO t1(k) VALUES (2), (4), (5) ON DUPLICATE KEY UPDATE c='2';
affected rows: 4
info: Records: 3 Duplicates: 1 Warnings: 0
#
# 5 rows, consecutive auto_inc values
#
SELECT * FROM t1 order by k;
id k c
1 1 NULL
2 2 2
3 3 NULL
4 4 NULL
5 5 NULL
affected rows: 5
DROP TABLE t1;
affected rows: 0
CREATE TABLE t1(
id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
k INT,
c CHAR(1),
UNIQUE KEY(k)) ENGINE=InnoDB;
affected rows: 0
#
# Sequential execution 2
#
INSERT INTO t1(k) VALUES (2), (4), (5) ON DUPLICATE KEY UPDATE c='2';
affected rows: 3
info: Records: 3 Duplicates: 0 Warnings: 0
#
# 1 duplicate
#
INSERT INTO t1(k) VALUES (1), (2), (3) ON DUPLICATE KEY UPDATE c='1';
affected rows: 4
info: Records: 3 Duplicates: 1 Warnings: 0
#
# 5 rows, consecutive auto_inc values
#
SELECT * FROM t1 order by k;
id k c
4 1 NULL
1 2 1
5 3 NULL
2 4 NULL
3 5 NULL
affected rows: 5
DROP TABLE t1;
affected rows: 0
CREATE TABLE t1(
id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
k INT,
c CHAR(1),
UNIQUE KEY(k)) ENGINE=InnoDB;
affected rows: 0
#
# Parallel execution
#
connect con2, localhost, root;
SET DEBUG_SYNC='now WAIT_FOR write_row_done';
connect con1, localhost, root;
SET DEBUG_SYNC='ha_write_row_end SIGNAL write_row_done WAIT_FOR continue';
affected rows: 0
INSERT INTO t1(k) VALUES (1), (2), (3) ON DUPLICATE KEY UPDATE c='1';
connection con2;
affected rows: 0
SET DEBUG_SYNC='execute_command_after_close_tables SIGNAL continue';
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;
#
# 2 duplicates
#
affected rows: 4
info: Records: 3 Duplicates: 1 Warnings: 0
connection default;
#
# 3 rows
#
SELECT * FROM t1 order by k;
id k c
1 1 NULL
4 2 1
2 3 NULL
5 4 NULL
6 5 NULL
affected rows: 5
INSERT INTO t1(k) VALUES (2), (4), (5) ON DUPLICATE KEY UPDATE c='2';
affected rows: 6
info: Records: 3 Duplicates: 3 Warnings: 0
SELECT * FROM t1 order by k;
id k c
1 1 NULL
4 2 2
2 3 NULL
5 4 2
6 5 2
affected rows: 5
disconnect con1;
disconnect con2;
connection default;
DROP TABLE t1;
#
# Parallel test with read_committed
#
set global transaction isolation level read committed;
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;
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';
connect con2, localhost, root;
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
disconnect con2;
connection con1;
affected rows: 4
info: Records: 3 Duplicates: 1 Warnings: 0
SET DEBUG_SYNC='RESET';
#
# 5 rows, gap in autoinc values
#
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;
connection default;
DROP TABLE t1;
set global transaction isolation level repeatable read;
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