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Commit cb0ce5c2 authored by Marko Mäkelä's avatar Marko Mäkelä
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MDEV-6076: Optimize the test. 

Remove unnecessary restarts by testing multiple tables across a restart.
This change almost halves the execution time.
Some further restarts could be removed with additional effort.
parent 8777458a
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Showing with 129 additions and 341 deletions
mysql-test/suite/innodb/include/autoinc_persist_alter.inc
View file @ cb0ce5c2
......@@ -41,21 +41,17 @@ eval SELECT MAX(a) AS `Expect 124` FROM $table;
eval OPTIMIZE TABLE $table;
eval SHOW CREATE TABLE $table;
--source include/restart_mysqld.inc
--echo # We expect the counter to still be 125
eval SHOW CREATE TABLE $table;
eval DELETE FROM $table WHERE a >= 123;
eval CREATE UNIQUE INDEX idx_aa ON $table(a);
eval CREATE TABLE i$table(a INT AUTO_INCREMENT, INDEX(a)) AUTO_INCREMENT=125 ENGINE=InnoDB;
eval CREATE UNIQUE INDEX idx_aa ON i$table(a);
--source include/restart_mysqld.inc
eval INSERT INTO $table VALUES(0), (0);
eval INSERT INTO i$table VALUES(0), (0);
eval SELECT MAX(a) AS `Expect 126` FROM $table;
eval SELECT MAX(a) AS `Expect 126` FROM i$table;
eval DROP TABLE $table;
eval DROP TABLE $table, i$table;
mysql-test/suite/innodb/r/autoinc_persist.result
View file @ cb0ce5c2
......@@ -204,7 +204,6 @@ a
20
30
31
set global innodb_flush_log_at_trx_commit=1;
CREATE TABLE t12(a DOUBLE AUTO_INCREMENT KEY) ENGINE = InnoDB;
INSERT INTO t12 VALUES(0), (0), (0), (0), (-1), (-10), (0),
(20), (30), (31);
......@@ -220,185 +219,9 @@ a
20
30
31
CREATE TABLE t13(a INT AUTO_INCREMENT PRIMARY KEY) ENGINE = InnoDB,
AUTO_INCREMENT = 1234;
# Scenario 1: Normal restart, to test if the counters are persisted
# We expect these results should be equal to above SELECTs
SELECT * FROM t1;
a
-10
-1
1
2
3
4
5
20
30
31
SELECT * FROM t2;
a
1
2
3
4
8
10
11
20
30
31
SELECT * FROM t3;
a
-10
-1
1
2
3
4
5
20
30
31
1024
4096
SELECT * FROM t4;
a
1
2
3
4
8
10
11
20
30
31
1024
4096
SELECT * FROM t5;
a
-10
-1
1
2
3
4
5
20
30
31
1000000
1000005
SELECT * FROM t6;
a
1
2
3
4
8
10
11
20
30
31
1000000
1000005
SELECT * FROM t7;
a
-10
-1
1
2
3
4
5
20
30
31
100000000
100000008
SELECT * FROM t8;
a
1
2
3
4
8
10
11
20
30
31
100000000
100000008
SELECT * FROM t9;
a
-10
-1
1
2
3
4
5
20
30
31
100000000000
100000000006
SELECT * FROM t10;
a
1
2
3
4
8
10
11
20
30
31
100000000000
100000000006
SELECT * FROM t11;
a
-10
-1
1
2
3
4
5
20
30
31
SELECT * FROM t12;
a
-10
-1
1
2
3
4
5
20
30
31
SELECT * FROM t13;
a
SHOW CREATE TABLE t13;
Table Create Table
t13 CREATE TABLE `t13` (
`a` int(11) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (`a`)
) ENGINE=InnoDB AUTO_INCREMENT=1234 DEFAULT CHARSET=latin1
INSERT INTO t13 VALUES(0);
SELECT a AS `Expect 1234` FROM t13;
Expect 1234
1234
# Scenario 2: Delete some values, to test the counters should not be the
# one which is the largest in current table
set global innodb_flush_log_at_trx_commit=1;
DELETE FROM t1 WHERE a > 30;
SELECT MAX(a) AS `Expect 30` FROM t1;
Expect 30
......@@ -419,6 +242,19 @@ DELETE FROM t9 WHERE a > 100000000000;
SELECT MAX(a) AS `Expect 100000000000` FROM t9;
Expect 100000000000
100000000000
CREATE TABLE t13(a INT AUTO_INCREMENT PRIMARY KEY) ENGINE = InnoDB,
AUTO_INCREMENT = 1234;
SHOW CREATE TABLE t13;
Table Create Table
t13 CREATE TABLE `t13` (
`a` int(11) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (`a`)
) ENGINE=InnoDB AUTO_INCREMENT=1234 DEFAULT CHARSET=latin1
INSERT INTO t13 VALUES(0);
SELECT a AS `Expect 1234` FROM t13;
Expect 1234
1234
DROP TABLE t13;
INSERT INTO t1 VALUES(0), (0);
SELECT MAX(a) AS `Expect 33` FROM t1;
Expect 33
......@@ -543,7 +379,6 @@ INSERT INTO t7 VALUES(0);
SELECT MAX(a) AS `Expect 100000109` FROM t7;
Expect 100000109
100000109
set global innodb_flush_log_at_trx_commit=1;
INSERT INTO t9 VALUES(100), (200);
UPDATE t9 SET a = 100000000105 WHERE a = 5;
UPDATE t9 SET a = 100000000100 WHERE a = 100;
......@@ -593,6 +428,7 @@ INSERT INTO t5 VALUES(1100200);
DELETE FROM t5 WHERE a = 1100200;
INSERT INTO t7 VALUES(100000200);
DELETE FROM t7 WHERE a = 100000200;
# Ensure that all changes before the server is killed are persisted.
set global innodb_flush_log_at_trx_commit=1;
INSERT INTO t9 VALUES(100000000200);
DELETE FROM t9 WHERE a = 100000000200;
......@@ -648,12 +484,20 @@ SELECT * FROM t9;
a
1
2
# Ensure that all changes before the server is killed are persisted.
set global innodb_flush_log_at_trx_commit=1;
TRUNCATE TABLE t1;
TRUNCATE TABLE t3;
TRUNCATE TABLE t5;
TRUNCATE TABLE t7;
TRUNCATE TABLE t9;
# Scenario 7: Test explicit rename table won't change the counter
RENAME TABLE t9 to t19;
INSERT INTO t19 VALUES(0), (0);
SELECT * FROM t19;
a
1
2
# Kill and restart
INSERT INTO t1 VALUES(0), (0);
SELECT * FROM t1;
......@@ -675,14 +519,6 @@ SELECT * FROM t7;
a
1
2
INSERT INTO t9 VALUES(0), (0);
SELECT * FROM t9;
a
1
2
# Scenario 7: Test explicit rename table won't change the counter
set global innodb_flush_log_at_trx_commit=1;
RENAME TABLE t9 to t19;
INSERT INTO t19 VALUES(0), (0);
SELECT * FROM t19;
a
......@@ -691,7 +527,6 @@ a
3
4
DELETE FROM t19 WHERE a = 4;
# Kill and restart
RENAME TABLE t19 to t9;
INSERT INTO t9 VALUES(0), (0);
SELECT * FROM t9;
......@@ -799,20 +634,19 @@ INSERT INTO t3 VALUES(0);
SELECT MAX(a) AS `Expect 120` FROM t3;
Expect 120
120
INSERT INTO mdev6076a SET b=0;
INSERT INTO mdev6076a SET b=NULL;
SELECT * FROM mdev6076a;
a b
1 2
2 1
3 0
INSERT INTO mdev6076b SET b=0;
3 NULL
INSERT INTO mdev6076b SET b=NULL;
SELECT * FROM mdev6076b;
a b
100 2
101 1
102 0
102 NULL
DROP TABLE mdev6076a, mdev6076b;
set global innodb_flush_log_at_trx_commit=1;
INSERT INTO t3 VALUES(0), (0), (200), (210);
# Test the different algorithms in ALTER TABLE
CREATE TABLE t_inplace LIKE t3;
......@@ -890,26 +724,18 @@ OPTIMIZE TABLE t_inplace;
Table Op Msg_type Msg_text
test.t_inplace optimize note Table does not support optimize, doing recreate + analyze instead
test.t_inplace optimize status OK
SHOW CREATE TABLE t_inplace;
Table Create Table
t_inplace CREATE TABLE `t_inplace` (
`a` smallint(6) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (`a`)
) ENGINE=InnoDB AUTO_INCREMENT=125 DEFAULT CHARSET=latin1
# We expect the counter to still be 125
SHOW CREATE TABLE t_inplace;
Table Create Table
t_inplace CREATE TABLE `t_inplace` (
`a` smallint(6) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (`a`)
) ENGINE=InnoDB AUTO_INCREMENT=125 DEFAULT CHARSET=latin1
DELETE FROM t_inplace WHERE a >= 123;
CREATE UNIQUE INDEX idx_aa ON t_inplace(a);
CREATE TABLE it_inplace(a INT AUTO_INCREMENT, INDEX(a)) AUTO_INCREMENT=125 ENGINE=InnoDB;
CREATE UNIQUE INDEX idx_aa ON it_inplace(a);
INSERT INTO t_inplace VALUES(0), (0);
INSERT INTO it_inplace VALUES(0), (0);
SELECT MAX(a) AS `Expect 126` FROM t_inplace;
Expect 126
126
DROP TABLE t_inplace;
SELECT MAX(a) AS `Expect 126` FROM it_inplace;
Expect 126
126
DROP TABLE t_inplace, it_inplace;
CREATE TABLE t_copy LIKE t3;
INSERT INTO t_copy SELECT * FROM t3;
SELECT * FROM t_copy;
......@@ -985,26 +811,18 @@ OPTIMIZE TABLE t_copy;
Table Op Msg_type Msg_text
test.t_copy optimize note Table does not support optimize, doing recreate + analyze instead
test.t_copy optimize status OK
SHOW CREATE TABLE t_copy;
Table Create Table
t_copy CREATE TABLE `t_copy` (
`a` smallint(6) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (`a`)
) ENGINE=InnoDB AUTO_INCREMENT=125 DEFAULT CHARSET=latin1
# We expect the counter to still be 125
SHOW CREATE TABLE t_copy;
Table Create Table
t_copy CREATE TABLE `t_copy` (
`a` smallint(6) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (`a`)
) ENGINE=InnoDB AUTO_INCREMENT=125 DEFAULT CHARSET=latin1
DELETE FROM t_copy WHERE a >= 123;
CREATE UNIQUE INDEX idx_aa ON t_copy(a);
CREATE TABLE it_copy(a INT AUTO_INCREMENT, INDEX(a)) AUTO_INCREMENT=125 ENGINE=InnoDB;
CREATE UNIQUE INDEX idx_aa ON it_copy(a);
INSERT INTO t_copy VALUES(0), (0);
INSERT INTO it_copy VALUES(0), (0);
SELECT MAX(a) AS `Expect 126` FROM t_copy;
Expect 126
126
DROP TABLE t_copy;
SELECT MAX(a) AS `Expect 126` FROM it_copy;
Expect 126
126
DROP TABLE t_copy, it_copy;
# Scenario 9: Test the sql_mode = NO_AUTO_VALUE_ON_ZERO
CREATE TABLE t30 (a INT NOT NULL AUTO_INCREMENT PRIMARY KEY, b INT, key(b)) ENGINE = InnoDB;
set SQL_MODE = NO_AUTO_VALUE_ON_ZERO;
......@@ -1029,6 +847,7 @@ a b
202 5
203 6
204 7
# Ensure that all changes before the server is killed are persisted.
set global innodb_flush_log_at_trx_commit=1;
CREATE TABLE t31 (a INT) ENGINE = InnoDB;
INSERT INTO t31 VALUES(1), (2);
......@@ -1043,6 +862,43 @@ a b
2 2
4 3
5 4
SET SQL_MODE = 0;
# Scenario 10: Rollback would not rollback the counter
CREATE TABLE t32 (
a BIGINT NOT NULL PRIMARY KEY AUTO_INCREMENT) ENGINE=InnoDB;
INSERT INTO t32 VALUES(0), (0);
# Ensure that all changes before the server is killed are persisted.
set global innodb_flush_log_at_trx_commit=1;
START TRANSACTION;
INSERT INTO t32 VALUES(0), (0);
SELECT MAX(a) AS `Expect 4` FROM t32;
Expect 4
4
DELETE FROM t32 WHERE a >= 2;
ROLLBACK;
# Scenario 11: Test duplicate primary key/secondary key will not stop
# increasing the counter
CREATE TABLE t33 (
a BIGINT NOT NULL PRIMARY KEY,
b BIGINT NOT NULL AUTO_INCREMENT,
KEY(b)) ENGINE = InnoDB;
INSERT INTO t33 VALUES(1, NULL);
INSERT INTO t33 VALUES(2, NULL);
INSERT INTO t33 VALUES(2, NULL);
ERROR 23000: Duplicate entry '2' for key 'PRIMARY'
INSERT INTO t33 VALUES(3, NULL);
SELECT MAX(b) AS `Expect 4` FROM t33;
Expect 4
4
TRUNCATE TABLE t33;
INSERT INTO t33 VALUES(1, NULL);
INSERT INTO t33 VALUES(2, NULL);
set global innodb_flush_log_at_trx_commit=1;
START TRANSACTION;
UPDATE t33 SET a = 10 WHERE a = 1;
INSERT INTO t33 VALUES(2, NULL);
ERROR 23000: Duplicate entry '2' for key 'PRIMARY'
COMMIT;
# Kill and restart
# This will not insert 0
INSERT INTO t31(a) VALUES(6), (0);
......@@ -1080,19 +936,6 @@ a b
0 6
300 7
SET SQL_MODE = 0;
# Scenario 10: Rollback would not rollback the counter
CREATE TABLE t32 (
a BIGINT NOT NULL PRIMARY KEY AUTO_INCREMENT) ENGINE=InnoDB;
INSERT INTO t32 VALUES(0), (0);
set global innodb_flush_log_at_trx_commit=1;
START TRANSACTION;
INSERT INTO t32 VALUES(0), (0);
SELECT MAX(a) AS `Expect 4` FROM t32;
Expect 4
4
DELETE FROM t32 WHERE a >= 2;
ROLLBACK;
# Kill and restart
SELECT MAX(a) AS `Expect 2` FROM t32;
Expect 2
2
......@@ -1100,32 +943,8 @@ INSERT INTO t32 VALUES(0), (0);
SELECT MAX(a) AS `Expect 6` FROM t32;
Expect 6
6
# Scenario 11: Test duplicate primary key/secondary key will not stop
# increasing the counter
CREATE TABLE t33 (
a BIGINT NOT NULL PRIMARY KEY,
b BIGINT NOT NULL AUTO_INCREMENT,
KEY(b)) ENGINE = InnoDB;
INSERT INTO t33 VALUES(1, NULL);
INSERT INTO t33 VALUES(2, NULL);
INSERT INTO t33 VALUES(2, NULL);
ERROR 23000: Duplicate entry '2' for key 'PRIMARY'
INSERT INTO t33 VALUES(3, NULL);
SELECT MAX(b) AS `Expect 4` FROM t33;
Expect 4
4
TRUNCATE TABLE t33;
INSERT INTO t33 VALUES(1, NULL);
INSERT INTO t33 VALUES(2, NULL);
set global innodb_flush_log_at_trx_commit=1;
START TRANSACTION;
UPDATE t33 SET a = 10 WHERE a = 1;
INSERT INTO t33 VALUES(2, NULL);
ERROR 23000: Duplicate entry '2' for key 'PRIMARY'
COMMIT;
# Kill and restart
INSERT INTO t33 VALUES(3, NULL);
SELECT MAX(b) AS `Expect 4` FROM t33;
Expect 4
4
DROP TABLE t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11, t12, t13, t30, t32, t33;
DROP TABLE t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11, t12, t30, t32, t33;
mysql-test/suite/innodb/t/autoinc_persist.test
View file @ cb0ce5c2
--source include/have_innodb.inc
# Restarting is not supported when testing the embedded server.
--source include/not_embedded.inc
--echo #
......@@ -84,45 +85,15 @@ INSERT INTO t11 VALUES(0), (0), (0), (0), (-1), (-10), (0),
(20), (30), (31);
SELECT * FROM t11;
# Since autoinc counter is persisted by redo logs, we don't want to
# lose them on kill and restart, so to make the result after restart stable.
set global innodb_flush_log_at_trx_commit=1;
CREATE TABLE t12(a DOUBLE AUTO_INCREMENT KEY) ENGINE = InnoDB;
INSERT INTO t12 VALUES(0), (0), (0), (0), (-1), (-10), (0),
(20), (30), (31);
SELECT * FROM t12;
CREATE TABLE t13(a INT AUTO_INCREMENT PRIMARY KEY) ENGINE = InnoDB,
AUTO_INCREMENT = 1234;
--echo # Scenario 1: Normal restart, to test if the counters are persisted
--source include/restart_mysqld.inc
--echo # We expect these results should be equal to above SELECTs
SELECT * FROM t1;
SELECT * FROM t2;
SELECT * FROM t3;
SELECT * FROM t4;
SELECT * FROM t5;
SELECT * FROM t6;
SELECT * FROM t7;
SELECT * FROM t8;
SELECT * FROM t9;
SELECT * FROM t10;
SELECT * FROM t11;
SELECT * FROM t12;
SELECT * FROM t13;
SHOW CREATE TABLE t13;
INSERT INTO t13 VALUES(0);
SELECT a AS `Expect 1234` FROM t13;
--echo # Scenario 2: Delete some values, to test the counters should not be the
--echo # one which is the largest in current table
set global innodb_flush_log_at_trx_commit=1;
DELETE FROM t1 WHERE a > 30;
SELECT MAX(a) AS `Expect 30` FROM t1;
DELETE FROM t3 WHERE a > 2000;
......@@ -134,8 +105,16 @@ SELECT MAX(a) AS `Expect 100000000` FROM t7;
DELETE FROM t9 WHERE a > 100000000000;
SELECT MAX(a) AS `Expect 100000000000` FROM t9;
CREATE TABLE t13(a INT AUTO_INCREMENT PRIMARY KEY) ENGINE = InnoDB,
AUTO_INCREMENT = 1234;
--source include/restart_mysqld.inc
SHOW CREATE TABLE t13;
INSERT INTO t13 VALUES(0);
SELECT a AS `Expect 1234` FROM t13;
DROP TABLE t13;
INSERT INTO t1 VALUES(0), (0);
SELECT MAX(a) AS `Expect 33` FROM t1;
INSERT INTO t3 VALUES(0), (0);
......@@ -222,8 +201,6 @@ DELETE FROM t7 WHERE a > 100000105;
INSERT INTO t7 VALUES(0);
SELECT MAX(a) AS `Expect 100000109` FROM t7;
set global innodb_flush_log_at_trx_commit=1;
INSERT INTO t9 VALUES(100), (200);
# Updating to bigger value will update the auto-increment counter
UPDATE t9 SET a = 100000000105 WHERE a = 5;
......@@ -268,6 +245,7 @@ DELETE FROM t5 WHERE a = 1100200;
INSERT INTO t7 VALUES(100000200);
DELETE FROM t7 WHERE a = 100000200;
--echo # Ensure that all changes before the server is killed are persisted.
set global innodb_flush_log_at_trx_commit=1;
INSERT INTO t9 VALUES(100000000200);
......@@ -313,6 +291,7 @@ SELECT * FROM t7;
INSERT INTO t9 VALUES(0), (0);
SELECT * FROM t9;
--echo # Ensure that all changes before the server is killed are persisted.
set global innodb_flush_log_at_trx_commit=1;
TRUNCATE TABLE t1;
......@@ -321,6 +300,12 @@ TRUNCATE TABLE t5;
TRUNCATE TABLE t7;
TRUNCATE TABLE t9;
--echo # Scenario 7: Test explicit rename table won't change the counter
RENAME TABLE t9 to t19;
INSERT INTO t19 VALUES(0), (0);
SELECT * FROM t19;
--source include/kill_and_restart_mysqld.inc
INSERT INTO t1 VALUES(0), (0);
......@@ -335,20 +320,10 @@ SELECT * FROM t5;
INSERT INTO t7 VALUES(0), (0);
SELECT * FROM t7;
INSERT INTO t9 VALUES(0), (0);
SELECT * FROM t9;
--echo # Scenario 7: Test explicit rename table won't change the counter
set global innodb_flush_log_at_trx_commit=1;
RENAME TABLE t9 to t19;
INSERT INTO t19 VALUES(0), (0);
SELECT * FROM t19;
DELETE FROM t19 WHERE a = 4;
--source include/kill_and_restart_mysqld.inc
RENAME TABLE t19 to t9;
INSERT INTO t9 VALUES(0), (0);
SELECT * FROM t9;
......@@ -413,14 +388,12 @@ ALGORITHM=INPLACE;
INSERT INTO t3 VALUES(0);
SELECT MAX(a) AS `Expect 120` FROM t3;
INSERT INTO mdev6076a SET b=0;
INSERT INTO mdev6076a SET b=NULL;
SELECT * FROM mdev6076a;
INSERT INTO mdev6076b SET b=0;
INSERT INTO mdev6076b SET b=NULL;
SELECT * FROM mdev6076b;
DROP TABLE mdev6076a, mdev6076b;
set global innodb_flush_log_at_trx_commit=1;
INSERT INTO t3 VALUES(0), (0), (200), (210);
--echo # Test the different algorithms in ALTER TABLE
......@@ -445,6 +418,7 @@ SELECT * FROM t30 ORDER BY b;
ALTER TABLE t30 MODIFY b MEDIUMINT;
SELECT * FROM t30 ORDER BY b;
--echo # Ensure that all changes before the server is killed are persisted.
set global innodb_flush_log_at_trx_commit=1;
CREATE TABLE t31 (a INT) ENGINE = InnoDB;
......@@ -455,25 +429,6 @@ INSERT INTO t31 VALUES(3, 0), (4, NULL), (5, NULL);
INSERT INTO t31 VALUES(6, 0);
SELECT * FROM t31;
--source include/kill_and_restart_mysqld.inc
--echo # This will not insert 0
INSERT INTO t31(a) VALUES(6), (0);
SELECT * FROM t31;
DROP TABLE t31;
set SQL_MODE = NO_AUTO_VALUE_ON_ZERO;
DELETE FROM t30 WHERE a = 0;
UPDATE t30 set a = 0 where b = 5;
SELECT * FROM t30 ORDER BY b;
DELETE FROM t30 WHERE a = 0;
UPDATE t30 SET a = NULL WHERE b = 6;
UPDATE t30 SET a = 300 WHERE b = 7;
SELECT * FROM t30 ORDER BY b;
SET SQL_MODE = 0;
--echo # Scenario 10: Rollback would not rollback the counter
......@@ -482,6 +437,7 @@ a BIGINT NOT NULL PRIMARY KEY AUTO_INCREMENT) ENGINE=InnoDB;
INSERT INTO t32 VALUES(0), (0);
--echo # Ensure that all changes before the server is killed are persisted.
set global innodb_flush_log_at_trx_commit=1;
START TRANSACTION;
......@@ -490,12 +446,6 @@ SELECT MAX(a) AS `Expect 4` FROM t32;
DELETE FROM t32 WHERE a >= 2;
ROLLBACK;
--source include/kill_and_restart_mysqld.inc
SELECT MAX(a) AS `Expect 2` FROM t32;
INSERT INTO t32 VALUES(0), (0);
SELECT MAX(a) AS `Expect 6` FROM t32;
--echo # Scenario 11: Test duplicate primary key/secondary key will not stop
--echo # increasing the counter
......@@ -527,7 +477,30 @@ COMMIT;
--source include/kill_and_restart_mysqld.inc
--echo # This will not insert 0
INSERT INTO t31(a) VALUES(6), (0);
SELECT * FROM t31;
DROP TABLE t31;
set SQL_MODE = NO_AUTO_VALUE_ON_ZERO;
DELETE FROM t30 WHERE a = 0;
UPDATE t30 set a = 0 where b = 5;
SELECT * FROM t30 ORDER BY b;
DELETE FROM t30 WHERE a = 0;
UPDATE t30 SET a = NULL WHERE b = 6;
UPDATE t30 SET a = 300 WHERE b = 7;
SELECT * FROM t30 ORDER BY b;
SET SQL_MODE = 0;
SELECT MAX(a) AS `Expect 2` FROM t32;
INSERT INTO t32 VALUES(0), (0);
SELECT MAX(a) AS `Expect 6` FROM t32;
INSERT INTO t33 VALUES(3, NULL);
SELECT MAX(b) AS `Expect 4` FROM t33;
DROP TABLE t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11, t12, t13, t30, t32, t33;
DROP TABLE t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11, t12, t30, t32, t33;
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