SET GLOBAL tx_isolation='REPEATABLE-READ';
SET GLOBAL innodb_file_per_table=on;
CREATE TABLE bug56680(
a INT AUTO_INCREMENT PRIMARY KEY,
b CHAR(1),
c INT,
INDEX(b))
ENGINE=InnoDB STATS_PERSISTENT=0;
INSERT INTO bug56680 VALUES(0,'x',1);
BEGIN;
SELECT b FROM bug56680;
b
x
connect  con1,localhost,root,,;
connection con1;
BEGIN;
UPDATE bug56680 SET b='X';
connection default;
SELECT b FROM bug56680;
b
x
SELECT * FROM bug56680;
a	b	c
1	x	1
connection con1;
ROLLBACK;
disconnect con1;
connection default;
SELECT b FROM bug56680;
b
x
SET GLOBAL tx_isolation='READ-UNCOMMITTED';
INSERT INTO bug56680 SELECT 0,b,c FROM bug56680;
INSERT INTO bug56680 SELECT 0,b,c FROM bug56680;
INSERT INTO bug56680 SELECT 0,b,c FROM bug56680;
INSERT INTO bug56680 SELECT 0,b,c FROM bug56680;
INSERT INTO bug56680 SELECT 0,b,c FROM bug56680;
INSERT INTO bug56680 SELECT 0,b,c FROM bug56680;
INSERT INTO bug56680 SELECT 0,b,c FROM bug56680;
INSERT INTO bug56680 SELECT 0,b,c FROM bug56680;
INSERT INTO bug56680 SELECT 0,b,c FROM bug56680;
INSERT INTO bug56680 SELECT 0,b,c FROM bug56680;
INSERT INTO bug56680 SELECT 0,b,c FROM bug56680;
BEGIN;
SELECT b FROM bug56680 LIMIT 2;
b
x
x
connect  con1,localhost,root,,;
connection con1;
BEGIN;
DELETE FROM bug56680 WHERE a=1;
INSERT INTO bug56680 VALUES(1,'X',1);
SELECT b FROM bug56680 LIMIT 3;
b
X
x
x
connection default;
SELECT b FROM bug56680 LIMIT 2;
b
x
x
CHECK TABLE bug56680;
Table	Op	Msg_type	Msg_text
test.bug56680	check	status	OK
connection con1;
ROLLBACK;
SELECT b FROM bug56680 LIMIT 2;
b
x
x
CHECK TABLE bug56680;
Table	Op	Msg_type	Msg_text
test.bug56680	check	status	OK
connection default;
disconnect con1;
SELECT b FROM bug56680 LIMIT 2;
b
x
x
CREATE TABLE bug56680_2(
a INT AUTO_INCREMENT PRIMARY KEY,
b VARCHAR(2) CHARSET latin1 COLLATE latin1_german2_ci,
c INT,
INDEX(b))
ENGINE=InnoDB STATS_PERSISTENT=0;
INSERT INTO bug56680_2 SELECT 0,_latin1 0xdf,c FROM bug56680;
BEGIN;
SELECT HEX(b) FROM bug56680_2 LIMIT 2;
HEX(b)
DF
DF
DELETE FROM bug56680_2 WHERE a=1;
INSERT INTO bug56680_2 VALUES(1,'SS',1);
SELECT HEX(b) FROM bug56680_2 LIMIT 3;
HEX(b)
5353
DF
DF
CHECK TABLE bug56680_2;
Table	Op	Msg_type	Msg_text
test.bug56680_2	check	status	OK
ALTER TABLE bug56680_2 ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=1;
SELECT HEX(b) FROM bug56680_2 LIMIT 2;
HEX(b)
5353
DF
DELETE FROM bug56680_2 WHERE a=1;
INSERT INTO bug56680_2 VALUES(1,_latin1 0xdf,1);
SELECT HEX(b) FROM bug56680_2 LIMIT 3;
HEX(b)
DF
DF
DF
CHECK TABLE bug56680_2;
Table	Op	Msg_type	Msg_text
test.bug56680_2	check	status	OK
# restart
CHECK TABLE bug56680_2;
Table	Op	Msg_type	Msg_text
test.bug56680_2	check	status	OK
DROP TABLE bug56680_2;
DROP TABLE bug56680;