#
# WL#6742 - Test the interaction of multiple transactions using
# different isolation levels to make sure that the value returned
# by count(*) always reflects the correct view of the table according
# to the transaction's selected isolation level.
#
#
# Traverse various indexes to get the right counts.
# This especially tests count(*) which is pushed down to InnoDB in WL#6742.
#
CREATE TABLE t1 (
c1 INT AUTO_INCREMENT PRIMARY KEY,
c2 INT,
c3 INT,
c4 INT,
INDEX k2(c2)
) Engine=InnoDB;
INSERT INTO t1(c2,c3,c4) VALUES (1, 1, 1);
INSERT INTO t1(c2,c3,c4) VALUES (1, 1, 1);
INSERT INTO t1(c2,c3,c4) VALUES (1, 1, 1);
INSERT INTO t1(c2,c3,c4) VALUES (1, 1, 1);
INSERT INTO t1(c2,c3,c4) VALUES (1, 1, 1);
INSERT INTO t1(c2,c3,c4) VALUES (1, 1, 1);
INSERT INTO t1(c2,c3,c4) VALUES (1, 1, 1);
INSERT INTO t1(c2,c3,c4) VALUES (1, 1, 1);
INSERT INTO t1(c2,c3,c4) VALUES (1, 1, 1);
INSERT INTO t1(c2,c3,c4) VALUES (1, 1, 1);
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 (SELECT * FROM t1);
affected rows: 10
info: Records: 10  Duplicates: 0  Warnings: 0
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	1	1	1
2	1	1	1
3	1	1	1
4	1	1	1
5	1	1	1
6	1	1	1
7	1	1	1
8	1	1	1
9	1	1	1
10	1	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
10
SELECT COUNT(c1) FROM t1;
COUNT(c1)
10
SELECT COUNT(c2) FROM t1;
COUNT(c2)
10
SELECT COUNT(c3) FROM t1;
COUNT(c3)
10
SELECT SUM(c1) FROM t1;
SUM(c1)
55
SELECT SUM(c2) FROM t1;
SUM(c2)
10
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
5.5000	10	1	1.0000	10
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
6	1
7	1
8	1
9	1
10	1
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
5
###############################################
#
# Do some DML in the default connection and leave the transaction pending.
#
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
BEGIN;
UPDATE t1 SET c2 = c2 * 3 WHERE c1 = 1;
affected rows: 1
info: Rows matched: 1  Changed: 1  Warnings: 0
DELETE FROM t1 WHERE c1 = 6;
affected rows: 1
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	3	1	1
2	1	1	1
3	1	1	1
4	1	1	1
5	1	1	1
7	1	1	1
8	1	1	1
9	1	1	1
10	1	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
9
SELECT COUNT(c1) FROM t1;
COUNT(c1)
9
SELECT COUNT(c2) FROM t1;
COUNT(c2)
9
SELECT COUNT(c3) FROM t1;
COUNT(c3)
9
SELECT SUM(c1) FROM t1;
SUM(c1)
49
SELECT SUM(c2) FROM t1;
SUM(c2)
11
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
5.4444	10	1	1.0000	9
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
5	1
7	1
8	1
9	1
10	1
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
4
###############################################
#
# Start transactions of Repeatable Read, Read Committed, and Read Uncommitted
#
# Connection 1 REPEATABLE READ
#
connect  con1,localhost,root,,;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
BEGIN;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	1	1	1
2	1	1	1
3	1	1	1
4	1	1	1
5	1	1	1
6	1	1	1
7	1	1	1
8	1	1	1
9	1	1	1
10	1	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
10
SELECT COUNT(c1) FROM t1;
COUNT(c1)
10
SELECT COUNT(c2) FROM t1;
COUNT(c2)
10
SELECT COUNT(c3) FROM t1;
COUNT(c3)
10
SELECT SUM(c1) FROM t1;
SUM(c1)
55
SELECT SUM(c2) FROM t1;
SUM(c2)
10
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
5.5000	10	1	1.0000	10
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
6	1
7	1
8	1
9	1
10	1
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
5
###############################################
UPDATE t1 SET c2 = c2 * 5 WHERE c1 = 2;
affected rows: 1
info: Rows matched: 1  Changed: 1  Warnings: 0
DELETE FROM t1 WHERE c1 = 7;
affected rows: 1
INSERT INTO t1(c2,c3,c4) VALUES (100, 1, 1);
affected rows: 1
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	1	1	1
2	5	1	1
3	1	1	1
4	1	1	1
5	1	1	1
6	1	1	1
8	1	1	1
9	1	1	1
10	1	1	1
11	100	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
10
SELECT COUNT(c1) FROM t1;
COUNT(c1)
10
SELECT COUNT(c2) FROM t1;
COUNT(c2)
10
SELECT COUNT(c3) FROM t1;
COUNT(c3)
10
SELECT SUM(c1) FROM t1;
SUM(c1)
59
SELECT SUM(c2) FROM t1;
SUM(c2)
113
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
5.9000	11	1	1.0000	10
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
6	1
8	1
9	1
10	1
11	100
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
5
###############################################
#
# Test a lock wait timeout during COUNT(*)
#
SET innodb_lock_wait_timeout = 1;
SELECT COUNT(*) FROM t1 FOR UPDATE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
#
# Connection 2 READ COMMITTED
#
connect  con2,localhost,root,,;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
BEGIN;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	1	1	1
2	1	1	1
3	1	1	1
4	1	1	1
5	1	1	1
6	1	1	1
7	1	1	1
8	1	1	1
9	1	1	1
10	1	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
10
SELECT COUNT(c1) FROM t1;
COUNT(c1)
10
SELECT COUNT(c2) FROM t1;
COUNT(c2)
10
SELECT COUNT(c3) FROM t1;
COUNT(c3)
10
SELECT SUM(c1) FROM t1;
SUM(c1)
55
SELECT SUM(c2) FROM t1;
SUM(c2)
10
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
5.5000	10	1	1.0000	10
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
6	1
7	1
8	1
9	1
10	1
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
5
###############################################
UPDATE t1 SET c2 = c2 * 7 WHERE c1 = 3;
affected rows: 1
info: Rows matched: 1  Changed: 1  Warnings: 0
DELETE FROM t1 WHERE c1 = 8;
affected rows: 1
INSERT INTO t1(c2,c3,c4) VALUES (1000, 1, 1);
affected rows: 1
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	1	1	1
2	1	1	1
3	7	1	1
4	1	1	1
5	1	1	1
6	1	1	1
7	1	1	1
9	1	1	1
10	1	1	1
12	1000	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
10
SELECT COUNT(c1) FROM t1;
COUNT(c1)
10
SELECT COUNT(c2) FROM t1;
COUNT(c2)
10
SELECT COUNT(c3) FROM t1;
COUNT(c3)
10
SELECT SUM(c1) FROM t1;
SUM(c1)
59
SELECT SUM(c2) FROM t1;
SUM(c2)
1015
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
5.9000	12	1	1.0000	10
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
6	1
7	1
9	1
10	1
12	1000
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
5
###############################################
#
# Connection 3  READ UNCOMMITTED
#
connect  con3,localhost,root,,;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
BEGIN;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	3	1	1
2	5	1	1
3	7	1	1
4	1	1	1
5	1	1	1
9	1	1	1
10	1	1	1
11	100	1	1
12	1000	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
9
SELECT COUNT(c1) FROM t1;
COUNT(c1)
9
SELECT COUNT(c2) FROM t1;
COUNT(c2)
9
SELECT COUNT(c3) FROM t1;
COUNT(c3)
9
SELECT SUM(c1) FROM t1;
SUM(c1)
57
SELECT SUM(c2) FROM t1;
SUM(c2)
1119
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
6.3333	12	1	1.0000	9
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
5	1
9	1
10	1
11	100
12	1000
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
4
###############################################
UPDATE t1 SET c2 = c2 * 11 WHERE c1 = 4;
affected rows: 1
info: Rows matched: 1  Changed: 1  Warnings: 0
INSERT INTO t1(c2,c3,c4) VALUES (10000, 1, 1);
affected rows: 1
DELETE FROM t1 WHERE c1 in(9);
affected rows: 1
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	3	1	1
2	5	1	1
3	7	1	1
4	11	1	1
5	1	1	1
10	1	1	1
11	100	1	1
12	1000	1	1
13	10000	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
9
SELECT COUNT(c1) FROM t1;
COUNT(c1)
9
SELECT COUNT(c2) FROM t1;
COUNT(c2)
9
SELECT COUNT(c3) FROM t1;
COUNT(c3)
9
SELECT SUM(c1) FROM t1;
SUM(c1)
61
SELECT SUM(c2) FROM t1;
SUM(c2)
11128
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
6.7778	13	1	1.0000	9
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
5	1
10	1
11	100
12	1000
13	10000
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
4
###############################################
#
# Connection default REPEATABLE READ
#
connection default;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	3	1	1
2	1	1	1
3	1	1	1
4	1	1	1
5	1	1	1
7	1	1	1
8	1	1	1
9	1	1	1
10	1	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
9
SELECT COUNT(c1) FROM t1;
COUNT(c1)
9
SELECT COUNT(c2) FROM t1;
COUNT(c2)
9
SELECT COUNT(c3) FROM t1;
COUNT(c3)
9
SELECT SUM(c1) FROM t1;
SUM(c1)
49
SELECT SUM(c2) FROM t1;
SUM(c2)
11
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
5.4444	10	1	1.0000	9
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
5	1
7	1
8	1
9	1
10	1
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
4
###############################################
#
# Commit the 3 extra connections
#
# Connection 1 REPEATABLE READ
#
connection con1;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	1	1	1
2	5	1	1
3	1	1	1
4	1	1	1
5	1	1	1
6	1	1	1
8	1	1	1
9	1	1	1
10	1	1	1
11	100	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
10
SELECT COUNT(c1) FROM t1;
COUNT(c1)
10
SELECT COUNT(c2) FROM t1;
COUNT(c2)
10
SELECT COUNT(c3) FROM t1;
COUNT(c3)
10
SELECT SUM(c1) FROM t1;
SUM(c1)
59
SELECT SUM(c2) FROM t1;
SUM(c2)
113
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
5.9000	11	1	1.0000	10
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
6	1
8	1
9	1
10	1
11	100
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
5
###############################################
#
# Connection 2 READ COMMITTED
#
connection con2;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	1	1	1
2	1	1	1
3	7	1	1
4	1	1	1
5	1	1	1
6	1	1	1
7	1	1	1
9	1	1	1
10	1	1	1
12	1000	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
10
SELECT COUNT(c1) FROM t1;
COUNT(c1)
10
SELECT COUNT(c2) FROM t1;
COUNT(c2)
10
SELECT COUNT(c3) FROM t1;
COUNT(c3)
10
SELECT SUM(c1) FROM t1;
SUM(c1)
59
SELECT SUM(c2) FROM t1;
SUM(c2)
1015
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
5.9000	12	1	1.0000	10
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
6	1
7	1
9	1
10	1
12	1000
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
5
###############################################
#
# Connection 3  READ UNCOMMITTED
#
connection con3;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	3	1	1
2	5	1	1
3	7	1	1
4	11	1	1
5	1	1	1
10	1	1	1
11	100	1	1
12	1000	1	1
13	10000	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
9
SELECT COUNT(c1) FROM t1;
COUNT(c1)
9
SELECT COUNT(c2) FROM t1;
COUNT(c2)
9
SELECT COUNT(c3) FROM t1;
COUNT(c3)
9
SELECT SUM(c1) FROM t1;
SUM(c1)
61
SELECT SUM(c2) FROM t1;
SUM(c2)
11128
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
6.7778	13	1	1.0000	9
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
5	1
10	1
11	100
12	1000
13	10000
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
4
###############################################
COMMIT;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	3	1	1
2	5	1	1
3	7	1	1
4	11	1	1
5	1	1	1
10	1	1	1
11	100	1	1
12	1000	1	1
13	10000	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
9
SELECT COUNT(c1) FROM t1;
COUNT(c1)
9
SELECT COUNT(c2) FROM t1;
COUNT(c2)
9
SELECT COUNT(c3) FROM t1;
COUNT(c3)
9
SELECT SUM(c1) FROM t1;
SUM(c1)
61
SELECT SUM(c2) FROM t1;
SUM(c2)
11128
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
6.7778	13	1	1.0000	9
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
5	1
10	1
11	100
12	1000
13	10000
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
4
###############################################
#
# Connection 2 READ COMMITTED
#
connection con2;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	1	1	1
2	1	1	1
3	7	1	1
4	11	1	1
5	1	1	1
6	1	1	1
7	1	1	1
10	1	1	1
12	1000	1	1
13	10000	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
10
SELECT COUNT(c1) FROM t1;
COUNT(c1)
10
SELECT COUNT(c2) FROM t1;
COUNT(c2)
10
SELECT COUNT(c3) FROM t1;
COUNT(c3)
10
SELECT SUM(c1) FROM t1;
SUM(c1)
63
SELECT SUM(c2) FROM t1;
SUM(c2)
11024
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
6.3000	13	1	1.0000	10
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
6	1
7	1
10	1
12	1000
13	10000
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
4
###############################################
COMMIT;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	1	1	1
2	1	1	1
3	7	1	1
4	11	1	1
5	1	1	1
6	1	1	1
7	1	1	1
10	1	1	1
12	1000	1	1
13	10000	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
10
SELECT COUNT(c1) FROM t1;
COUNT(c1)
10
SELECT COUNT(c2) FROM t1;
COUNT(c2)
10
SELECT COUNT(c3) FROM t1;
COUNT(c3)
10
SELECT SUM(c1) FROM t1;
SUM(c1)
63
SELECT SUM(c2) FROM t1;
SUM(c2)
11024
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
6.3000	13	1	1.0000	10
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
6	1
7	1
10	1
12	1000
13	10000
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
4
###############################################
#
# Connection 1 REPEATABLE READ
#
connection con1;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	1	1	1
2	5	1	1
3	1	1	1
4	1	1	1
5	1	1	1
6	1	1	1
8	1	1	1
9	1	1	1
10	1	1	1
11	100	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
10
SELECT COUNT(c1) FROM t1;
COUNT(c1)
10
SELECT COUNT(c2) FROM t1;
COUNT(c2)
10
SELECT COUNT(c3) FROM t1;
COUNT(c3)
10
SELECT SUM(c1) FROM t1;
SUM(c1)
59
SELECT SUM(c2) FROM t1;
SUM(c2)
113
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
5.9000	11	1	1.0000	10
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
6	1
8	1
9	1
10	1
11	100
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
5
###############################################
#
# Select the first 5 records FOR UPDATE using count(*) in a subquery.
# The second record is still pending so we get a lock timeout.
#
SET innodb_lock_wait_timeout = 1;
SELECT c1, c2 FROM t1 WHERE c1 < ((SELECT COUNT(*) FROM t1) / 2) FOR UPDATE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SELECT COUNT(*) FROM t1 FOR UPDATE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
COMMIT;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	1	1	1
2	5	1	1
3	7	1	1
4	11	1	1
5	1	1	1
6	1	1	1
10	1	1	1
11	100	1	1
12	1000	1	1
13	10000	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
10
SELECT COUNT(c1) FROM t1;
COUNT(c1)
10
SELECT COUNT(c2) FROM t1;
COUNT(c2)
10
SELECT COUNT(c3) FROM t1;
COUNT(c3)
10
SELECT SUM(c1) FROM t1;
SUM(c1)
67
SELECT SUM(c2) FROM t1;
SUM(c2)
11127
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
6.7000	13	1	1.0000	10
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
6	1
10	1
11	100
12	1000
13	10000
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
4
###############################################
#
# Show The EXPLAIN output for these queries;
#
EXPLAIN SELECT * FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	#	
EXPLAIN SELECT COUNT(*) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	k2	5	NULL	#	Using index
EXPLAIN SELECT COUNT(c1) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	k2	5	NULL	#	Using index
EXPLAIN SELECT COUNT(c2) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	k2	5	NULL	#	Using index
EXPLAIN SELECT COUNT(c3) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	#	
EXPLAIN SELECT SUM(c1) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	k2	5	NULL	#	Using index
EXPLAIN SELECT SUM(c2) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	k2	5	NULL	#	Using index
EXPLAIN SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	#	
EXPLAIN SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	range	PRIMARY	PRIMARY	4	NULL	#	Using where
2	SUBQUERY	t1	index	NULL	k2	5	NULL	#	Using index
EXPLAIN SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	range	PRIMARY	PRIMARY	4	NULL	#	Using where
2	SUBQUERY	t1	index	NULL	k2	5	NULL	#	Using index
EXPLAIN SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	range	PRIMARY	PRIMARY	4	NULL	#	Using where
2	SUBQUERY	t1	index	NULL	k2	5	NULL	#	Using index
#
# Make all indexes in t2 obsolete to the active repeatable read transaction
# in the default connection.
#
ALTER TABLE t2 row_format=redundant;
#
# Connection default REPEATABLE READ
# Do more DML in the default REPEATABLE READ transaction in order to use recently committed records.
#
connection default;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	3	1	1
2	1	1	1
3	1	1	1
4	1	1	1
5	1	1	1
7	1	1	1
8	1	1	1
9	1	1	1
10	1	1	1
SELECT COUNT(*) FROM t1;
COUNT(*)
9
SELECT COUNT(c1) FROM t1;
COUNT(c1)
9
SELECT COUNT(c2) FROM t1;
COUNT(c2)
9
SELECT COUNT(c3) FROM t1;
COUNT(c3)
9
SELECT SUM(c1) FROM t1;
SUM(c1)
49
SELECT SUM(c2) FROM t1;
SUM(c2)
11
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
5.4444	10	1	1.0000	9
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
5	1
7	1
8	1
9	1
10	1
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
4
###############################################
UPDATE t1 SET c4 = c2 * 10;
affected rows: 9
info: Rows matched: 9  Changed: 9  Warnings: 0
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	3	1	30
2	5	1	50
3	7	1	70
4	11	1	110
5	1	1	10
7	1	1	1
8	1	1	1
9	1	1	1
10	1	1	10
11	100	1	1000
12	1000	1	10000
13	10000	1	100000
SELECT COUNT(*) FROM t1;
COUNT(*)
12
SELECT COUNT(c1) FROM t1;
COUNT(c1)
12
SELECT COUNT(c2) FROM t1;
COUNT(c2)
12
SELECT COUNT(c3) FROM t1;
COUNT(c3)
12
SELECT SUM(c1) FROM t1;
SUM(c1)
85
SELECT SUM(c2) FROM t1;
SUM(c2)
11131
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
7.0833	13	1	1.0000	111283
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
7	1
8	1
9	1
10	1
11	100
12	1000
13	10000
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
7
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
6
###############################################
#
# Table t2 has been altered to a new row format.
# The index should not be useable.
#
SELECT COUNT(*) FROM t2;
ERROR HY000: Table definition has changed, please retry transaction
SELECT * FROM t2;
ERROR HY000: Table definition has changed, please retry transaction
COMMIT;
SELECT COUNT(*) FROM t2;
COUNT(*)
10
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	3	1	30
2	5	1	50
3	7	1	70
4	11	1	110
5	1	1	10
10	1	1	10
11	100	1	1000
12	1000	1	10000
13	10000	1	100000
SELECT COUNT(*) FROM t1;
COUNT(*)
9
SELECT COUNT(c1) FROM t1;
COUNT(c1)
9
SELECT COUNT(c2) FROM t1;
COUNT(c2)
9
SELECT COUNT(c3) FROM t1;
COUNT(c3)
9
SELECT SUM(c1) FROM t1;
SUM(c1)
61
SELECT SUM(c2) FROM t1;
SUM(c2)
11128
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
6.7778	13	1	1.0000	111280
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
5	1
10	1
11	100
12	1000
13	10000
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
4
###############################################
#
# Connection 2
#
connection con2;
########## innodb_isolation_selects.inc ##########
SELECT * FROM t1;
c1	c2	c3	c4
1	3	1	30
2	5	1	50
3	7	1	70
4	11	1	110
5	1	1	10
10	1	1	10
11	100	1	1000
12	1000	1	10000
13	10000	1	100000
SELECT COUNT(*) FROM t1;
COUNT(*)
9
SELECT COUNT(c1) FROM t1;
COUNT(c1)
9
SELECT COUNT(c2) FROM t1;
COUNT(c2)
9
SELECT COUNT(c3) FROM t1;
COUNT(c3)
9
SELECT SUM(c1) FROM t1;
SUM(c1)
61
SELECT SUM(c2) FROM t1;
SUM(c2)
11128
SELECT AVG(c1), MAX(c1), MIN(c2), AVG(c3), SUM(c4) FROM t1;
AVG(c1)	MAX(c1)	MIN(c2)	AVG(c3)	SUM(c4)
6.7778	13	1	1.0000	111280
SELECT c1, c2 FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
c1	c2
5	1
10	1
11	100
12	1000
13	10000
SELECT COUNT(c2) FROM t1 WHERE c1 > ((SELECT COUNT(*) FROM t1) / 2);
COUNT(c2)
5
SELECT COUNT(*) FROM t1 WHERE c1 > (SELECT AVG(c1) FROM t1);
COUNT(*)
4
###############################################
#
# Try COUNT(*) on a DISCARDED table.
#
connection default;
CREATE TABLE t4 LIKE t1;
INSERT INTO t4 (SELECT * FROM t1);
SELECT COUNT(*) FROM t4;
COUNT(*)
9
ALTER TABLE t4 DISCARD TABLESPACE;
SELECT COUNT(*) FROM t4;
ERROR HY000: Tablespace has been discarded for table `t4`
#
# Test the interaction of a repeatable read transaction
# to changes that happen outside its view.
#
CREATE TABLE t5 (a INT AUTO_INCREMENT PRIMARY KEY, b TEXT, aa INT, bb TEXT) Engine=InnoDB;
INSERT INTO t5(b) VALUES ("inserted by client 1");
INSERT INTO t5(b) VALUES ("inserted by client 1");
INSERT INTO t5(b) VALUES ("inserted by client 1");
INSERT INTO t5(b) VALUES ("inserted by client 1");
UPDATE t5 SET aa=a, bb=b;
CREATE TABLE t6 (a INT AUTO_INCREMENT PRIMARY KEY, b TEXT, aa INT, bb TEXT) Engine=InnoDB;
INSERT INTO t6(b) VALUES ("inserted by client 1");
INSERT INTO t6(b) VALUES ("inserted by client 1");
INSERT INTO t6(b) VALUES ("inserted by client 1");
INSERT INTO t6(b) VALUES ("inserted by client 1");
UPDATE t6 SET aa=a, bb=b;
CREATE TABLE t7 (a INT AUTO_INCREMENT PRIMARY KEY, b TEXT, aa INT, bb TEXT) Engine=InnoDB;
INSERT INTO t7(b) VALUES ("inserted by client 1");
INSERT INTO t7(b) VALUES ("inserted by client 1");
INSERT INTO t7(b) VALUES ("inserted by client 1");
INSERT INTO t7(b) VALUES ("inserted by client 1");
UPDATE t7 SET aa=a, bb=b;
BEGIN;
SELECT * FROM t5;
a	b	aa	bb
1	inserted by client 1	1	inserted by client 1
2	inserted by client 1	2	inserted by client 1
3	inserted by client 1	3	inserted by client 1
4	inserted by client 1	4	inserted by client 1
SELECT COUNT(*) FROM t5;
COUNT(*)
4
SELECT * FROM t6;
a	b	aa	bb
1	inserted by client 1	1	inserted by client 1
2	inserted by client 1	2	inserted by client 1
3	inserted by client 1	3	inserted by client 1
4	inserted by client 1	4	inserted by client 1
SELECT COUNT(*) FROM t6;
COUNT(*)
4
SELECT * FROM t7;
a	b	aa	bb
1	inserted by client 1	1	inserted by client 1
2	inserted by client 1	2	inserted by client 1
3	inserted by client 1	3	inserted by client 1
4	inserted by client 1	4	inserted by client 1
SELECT COUNT(*) FROM t7;
COUNT(*)
4
#
# Connection 1
#
connection con1;
INSERT INTO t5(b) VALUES ("inserted by client 2");
UPDATE t5 SET a = 10 where a = 1;
UPDATE t5 SET b = "updated by client 2" where a = 2;
DELETE FROM t5 WHERE a = 3;
SELECT * FROM t5;
a	b	aa	bb
2	updated by client 2	2	inserted by client 1
4	inserted by client 1	4	inserted by client 1
5	inserted by client 2	NULL	NULL
10	inserted by client 1	1	inserted by client 1
SELECT COUNT(*) FROM t5;
COUNT(*)
4
INSERT INTO t6(b) VALUES ("inserted by client 2");
UPDATE t6 SET a = 10 where a = 1;
UPDATE t6 SET b = "updated by client 2" where a = 2;
DELETE FROM t6 WHERE a = 3;
SELECT * FROM t6;
a	b	aa	bb
2	updated by client 2	2	inserted by client 1
4	inserted by client 1	4	inserted by client 1
5	inserted by client 2	NULL	NULL
10	inserted by client 1	1	inserted by client 1
SELECT COUNT(*) FROM t6;
COUNT(*)
4
INSERT INTO t7(b) VALUES ("inserted by client 2");
UPDATE t7 SET a = 10 where a = 1;
UPDATE t7 SET b = "updated by client 2" where a = 2;
DELETE FROM t7 WHERE a = 3;
SELECT * FROM t7;
a	b	aa	bb
2	updated by client 2	2	inserted by client 1
4	inserted by client 1	4	inserted by client 1
5	inserted by client 2	NULL	NULL
10	inserted by client 1	1	inserted by client 1
SELECT COUNT(*) FROM t7;
COUNT(*)
4
#
# Connection default
#
connection default;
SELECT * FROM t5;
a	b	aa	bb
1	inserted by client 1	1	inserted by client 1
2	inserted by client 1	2	inserted by client 1
3	inserted by client 1	3	inserted by client 1
4	inserted by client 1	4	inserted by client 1
INSERT INTO t5(b) VALUES ("inserted by client 1");
SELECT * FROM t5;
a	b	aa	bb
1	inserted by client 1	1	inserted by client 1
2	inserted by client 1	2	inserted by client 1
3	inserted by client 1	3	inserted by client 1
4	inserted by client 1	4	inserted by client 1
11	inserted by client 1	NULL	NULL
UPDATE t5 SET a = a + 100;
SELECT * FROM t5;
a	b	aa	bb
1	inserted by client 1	1	inserted by client 1
3	inserted by client 1	3	inserted by client 1
102	updated by client 2	2	inserted by client 1
104	inserted by client 1	4	inserted by client 1
105	inserted by client 2	NULL	NULL
110	inserted by client 1	1	inserted by client 1
111	inserted by client 1	NULL	NULL
SELECT COUNT(*) FROM t5;
COUNT(*)
7
UPDATE t6 SET b = "updated by client 2";
SELECT * FROM t6;
a	b	aa	bb
1	inserted by client 1	1	inserted by client 1
2	inserted by client 1	2	inserted by client 1
3	inserted by client 1	3	inserted by client 1
4	updated by client 2	4	inserted by client 1
5	updated by client 2	NULL	NULL
10	updated by client 2	1	inserted by client 1
SELECT * FROM t6 LOCK IN SHARE MODE;
a	b	aa	bb
2	updated by client 2	2	inserted by client 1
4	updated by client 2	4	inserted by client 1
5	updated by client 2	NULL	NULL
10	updated by client 2	1	inserted by client 1
SELECT COUNT(*) FROM t6;
COUNT(*)
6
DELETE FROM t7;
SELECT * FROM t7;
a	b	aa	bb
1	inserted by client 1	1	inserted by client 1
3	inserted by client 1	3	inserted by client 1
SELECT COUNT(*) FROM t7;
COUNT(*)
2
COMMIT;
SELECT * FROM t5;
a	b	aa	bb
102	updated by client 2	2	inserted by client 1
104	inserted by client 1	4	inserted by client 1
105	inserted by client 2	NULL	NULL
110	inserted by client 1	1	inserted by client 1
111	inserted by client 1	NULL	NULL
SELECT COUNT(*) FROM t5;
COUNT(*)
5
SELECT * FROM t6;
a	b	aa	bb
2	updated by client 2	2	inserted by client 1
4	updated by client 2	4	inserted by client 1
5	updated by client 2	NULL	NULL
10	updated by client 2	1	inserted by client 1
SELECT COUNT(*) FROM t6;
COUNT(*)
4
SELECT * FROM t7;
a	b	aa	bb
SELECT COUNT(*) FROM t7;
COUNT(*)
0
#
# Cleanup
#
DROP TABLE t1,t2,t4,t5,t6,t7;
disconnect con1;
disconnect con2;
disconnect con3;
#
# Bug #23596760: FORCE INDEX IS SKIPPED WHILE EXECUTING SELECT COUNT(*)
#
CREATE TABLE t1(c1 INT NOT NULL PRIMARY KEY,
c2 INT NOT NULL DEFAULT 1,
c3 char(20) DEFAULT '',
KEY c2_idx (c2)) ENGINE=InnoDB STATS_PERSISTENT=0;
INSERT INTO t1(c1) VALUES (1), (2), (3);
INSERT INTO t1(c1) SELECT c1 + 10 FROM t1;
INSERT INTO t1(c1) SELECT c1 + 100 FROM t1;
CREATE TABLE t2 STATS_PERSISTENT=0 SELECT * FROM t1;
EXPLAIN SELECT COUNT(*) FROM t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	c2_idx	4	NULL	12	Using index
EXPLAIN SELECT COUNT(*) FROM t1 FORCE INDEX(c2_idx);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	c2_idx	4	NULL	12	Using index
EXPLAIN SELECT COUNT(*) FROM t1, t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	c2_idx	4	NULL	12	Using index
1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	12	Using join buffer (flat, BNL join)
EXPLAIN SELECT COUNT(*) FROM t1 FORCE INDEX(c2_idx), t2;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	c2_idx	4	NULL	12	Using index
1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	12	Using join buffer (flat, BNL join)
DROP TABLE t1, t2;