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SET default_storage_engine=InnoDB;
set global innodb_file_per_table=1;
### Test 1 ###
create table worklog5743(a TEXT not null, primary key (a(1000))) ROW_FORMAT=DYNAMIC;
show warnings;
Level	Code	Message
insert into worklog5743 values(repeat("a", 20000));
update worklog5743 set a = (repeat("b", 16000));
create index idx on worklog5743(a(2000));
show warnings;
Level	Code	Message
begin;
update worklog5743 set a = (repeat("x", 17000));
select @@session.tx_isolation;
@@session.tx_isolation
REPEATABLE-READ
connect  con1,localhost,root,,;
select a = repeat("x", 17000) from worklog5743;
a = repeat("x", 17000)
0
select a = repeat("b", 16000) from worklog5743;
a = repeat("b", 16000)
1
connect  con2,localhost,root,,;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
select @@session.tx_isolation;
@@session.tx_isolation
READ-UNCOMMITTED
select a = repeat("x", 17000) from worklog5743;
a = repeat("x", 17000)
1
connection default;
rollback;
drop table worklog5743;
### Test 2 ###
create table worklog5743(a1 int, a2 TEXT not null) ROW_FORMAT=DYNAMIC;
show warnings;
Level	Code	Message
create index idx on worklog5743(a1, a2(2000));
show warnings;
Level	Code	Message
insert into worklog5743 values(9, repeat("a", 10000));
begin;
update worklog5743 set a1 = 1000;
connection con1;
select @@session.tx_isolation;
@@session.tx_isolation
REPEATABLE-READ
explain select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	worklog5743	ref	idx	idx	5	const	1	
select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
a1	a2 = repeat("a", 10000)
9	1
connection con2;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
select @@session.tx_isolation;
@@session.tx_isolation
READ-UNCOMMITTED
select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
a1	a2 = repeat("a", 10000)
connection default;
rollback;
drop table worklog5743;
### Test 3 ###
create table worklog5743(a1 int, a2 TEXT not null) ROW_FORMAT=DYNAMIC;
create index idx on worklog5743(a1, a2(50));
insert into worklog5743 values(9, repeat("a", 10000));
begin;
update worklog5743 set a1 = 1000;
connection con1;
select @@session.tx_isolation;
@@session.tx_isolation
REPEATABLE-READ
explain select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	worklog5743	ref	idx	idx	5	const	1	
select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
a1	a2 = repeat("a", 10000)
9	1
connection con2;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
select @@session.tx_isolation;
@@session.tx_isolation
READ-UNCOMMITTED
select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
a1	a2 = repeat("a", 10000)
connection default;
rollback;
drop table worklog5743;
### Test 4 ###
create table worklog5743_1(a1 int, a2 TEXT not null) KEY_BLOCK_SIZE=1;
create table worklog5743_2(a1 int, a2 TEXT not null) KEY_BLOCK_SIZE=2;
create table worklog5743_4(a1 int, a2 TEXT not null) KEY_BLOCK_SIZE=4;
create table worklog5743_8(a1 int, a2 TEXT, a3 TEXT) KEY_BLOCK_SIZE=8;
create table worklog5743_16(a1 int, a2 TEXT, a3 TEXT) KEY_BLOCK_SIZE=16;
create index idx2 on worklog5743_1(a2(4000));
Got one of the listed errors
show warnings;
Level	Code	Message
Note	1071	Specified key was too long; max key length is 3072 bytes
Error	1118	Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
create index idx3 on worklog5743_1(a2(436));
ERROR 42000: Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
show warnings;
Level	Code	Message
Error	1118	Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
create index idx4 on worklog5743_1(a2(290));
show warnings;
Level	Code	Message
create index idx5 on worklog5743_1(a1, a2(430));
ERROR 42000: Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
show warnings;
Level	Code	Message
Error	1118	Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
create index idx6 on worklog5743_1(a1, a2(283));
show warnings;
Level	Code	Message
create index idx2 on worklog5743_2(a2(4000));
ERROR 42000: Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
show warnings;
Level	Code	Message
Note	1071	Specified key was too long; max key length is 3072 bytes
Error	1118	Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
create index idx3 on worklog5743_2(a2(948));
ERROR 42000: Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
show warnings;
Level	Code	Message
Error	1118	Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
create index idx4 on worklog5743_2(a2(802));
show warnings;
Level	Code	Message
create index idx5 on worklog5743_2(a1, a2(942));
ERROR 42000: Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
show warnings;
Level	Code	Message
Error	1118	Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
create index idx6 on worklog5743_2(a1, a2(795));
show warnings;
Level	Code	Message
create index idx2 on worklog5743_4(a2(4000));
ERROR 42000: Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
show warnings;
Level	Code	Message
Note	1071	Specified key was too long; max key length is 3072 bytes
Error	1118	Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
create index idx3 on worklog5743_4(a2(1972));
ERROR 42000: Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
show warnings;
Level	Code	Message
Error	1118	Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
create index idx4 on worklog5743_4(a2(1826));
show warnings;
Level	Code	Message
create index idx5 on worklog5743_4(a1, a2(1966));
ERROR 42000: Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
show warnings;
Level	Code	Message
Error	1118	Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs
create index idx6 on worklog5743_4(a1, a2(1819));
show warnings;
Level	Code	Message
create index idx2 on worklog5743_8(a2(3073));
Warnings:
Note	1071	Specified key was too long; max key length is 3072 bytes
show warnings;
Level	Code	Message
Note	1071	Specified key was too long; max key length is 3072 bytes
create index idx3 on worklog5743_8(a2(3072));
Warnings:
Note	1831	Duplicate index `idx3`. This is deprecated and will be disallowed in a future release
show warnings;
Level	Code	Message
Note	1831	Duplicate index `idx3`. This is deprecated and will be disallowed in a future release
create index idx4 on worklog5743_8(a1, a2(3069));
ERROR 42000: Specified key was too long; max key length is 3072 bytes
show warnings;
Level	Code	Message
Error	1071	Specified key was too long; max key length is 3072 bytes
create index idx5 on worklog5743_8(a1, a2(3068));
show warnings;
Level	Code	Message
create index idx6 on worklog5743_8(a1, a2(2000), a3(1069));
ERROR 42000: Specified key was too long; max key length is 3072 bytes
show warnings;
Level	Code	Message
Error	1071	Specified key was too long; max key length is 3072 bytes
create index idx7 on worklog5743_8(a1, a2(2000), a3(1068));
show warnings;
Level	Code	Message
create index idx2 on worklog5743_16(a2(3073));
Warnings:
Note	1071	Specified key was too long; max key length is 3072 bytes
show warnings;
Level	Code	Message
Note	1071	Specified key was too long; max key length is 3072 bytes
create index idx3 on worklog5743_16(a2(3072));
Warnings:
Note	1831	Duplicate index `idx3`. This is deprecated and will be disallowed in a future release
show warnings;
Level	Code	Message
Note	1831	Duplicate index `idx3`. This is deprecated and will be disallowed in a future release
create index idx4 on worklog5743_16(a1, a2(3069));
ERROR 42000: Specified key was too long; max key length is 3072 bytes
show warnings;
Level	Code	Message
Error	1071	Specified key was too long; max key length is 3072 bytes
create index idx5 on worklog5743_16(a1, a2(3068));
show warnings;
Level	Code	Message
create index idx6 on worklog5743_16(a1, a2(2000), a3(1069));
ERROR 42000: Specified key was too long; max key length is 3072 bytes
show warnings;
Level	Code	Message
Error	1071	Specified key was too long; max key length is 3072 bytes
create index idx7 on worklog5743_16(a1, a2(2000), a3(1068));
show warnings;
Level	Code	Message
set sql_mode= default;
insert into worklog5743_1 values(9, repeat("a", 10000));
insert into worklog5743_2 values(9, repeat("a", 10000));
insert into worklog5743_4 values(9, repeat("a", 10000));
insert into worklog5743_8 values(9, repeat("a", 10000), repeat("a", 10000));
insert into worklog5743_16 values(9, repeat("a", 10000), repeat("a", 10000));
select a1, left(a2, 20) from worklog5743_1;
a1	left(a2, 20)
9	aaaaaaaaaaaaaaaaaaaa
select a1, left(a2, 20) from worklog5743_2;
a1	left(a2, 20)
9	aaaaaaaaaaaaaaaaaaaa
select a1, left(a2, 20) from worklog5743_4;
a1	left(a2, 20)
9	aaaaaaaaaaaaaaaaaaaa
select a1, left(a2, 20) from worklog5743_8;
a1	left(a2, 20)
9	aaaaaaaaaaaaaaaaaaaa
select a1, left(a2, 20) from worklog5743_16;
a1	left(a2, 20)
9	aaaaaaaaaaaaaaaaaaaa
begin;
update worklog5743_1 set a1 = 1000;
update worklog5743_2 set a1 = 1000;
update worklog5743_4 set a1 = 1000;
update worklog5743_8 set a1 = 1000;
update worklog5743_16 set a1 = 1000;
select a1, left(a2, 20) from worklog5743_1;
a1	left(a2, 20)
1000	aaaaaaaaaaaaaaaaaaaa
select a1, left(a2, 20) from worklog5743_2;
a1	left(a2, 20)
1000	aaaaaaaaaaaaaaaaaaaa
select a1, left(a2, 20) from worklog5743_4;
a1	left(a2, 20)
1000	aaaaaaaaaaaaaaaaaaaa
select a1, left(a2, 20) from worklog5743_8;
a1	left(a2, 20)
1000	aaaaaaaaaaaaaaaaaaaa
select a1, left(a2, 20) from worklog5743_16;
a1	left(a2, 20)
1000	aaaaaaaaaaaaaaaaaaaa
connection con1;
select @@session.tx_isolation;
@@session.tx_isolation
REPEATABLE-READ
explain select a1, left(a2, 20) from worklog5743_1 where a1 = 9;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	worklog5743_1	ref	idx6	idx6	5	const	1	
explain select a1, left(a2, 20) from worklog5743_2 where a1 = 9;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	worklog5743_2	ref	idx6	idx6	5	const	1	
explain select a1, left(a2, 20) from worklog5743_4 where a1 = 9;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	worklog5743_4	ref	idx6	idx6	5	const	1	
explain select a1, left(a2, 20) from worklog5743_8 where a1 = 9;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	worklog5743_8	ref	idx5,idx7	idx5	5	const	1	
explain select a1, left(a2, 20) from worklog5743_16 where a1 = 9;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	worklog5743_16	ref	idx5,idx7	idx5	5	const	1	
select a1, left(a2, 20) from worklog5743_1 where a1 = 9;
a1	left(a2, 20)
9	aaaaaaaaaaaaaaaaaaaa
select a1, left(a2, 20) from worklog5743_2 where a1 = 9;
a1	left(a2, 20)
9	aaaaaaaaaaaaaaaaaaaa
select a1, left(a2, 20) from worklog5743_4 where a1 = 9;
a1	left(a2, 20)
9	aaaaaaaaaaaaaaaaaaaa
select a1, left(a2, 20) from worklog5743_8 where a1 = 9;
a1	left(a2, 20)
9	aaaaaaaaaaaaaaaaaaaa
select a1, left(a2, 20) from worklog5743_16 where a1 = 9;
a1	left(a2, 20)
9	aaaaaaaaaaaaaaaaaaaa
connection con2;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
select @@session.tx_isolation;
@@session.tx_isolation
READ-UNCOMMITTED
select a1, left(a2, 20) from worklog5743_1 where a1 = 9;
a1	left(a2, 20)
select a1, left(a2, 20) from worklog5743_2 where a1 = 9;
a1	left(a2, 20)
select a1, left(a2, 20) from worklog5743_4 where a1 = 9;
a1	left(a2, 20)
select a1, left(a2, 20) from worklog5743_8 where a1 = 9;
a1	left(a2, 20)
select a1, left(a2, 20) from worklog5743_16 where a1 = 9;
a1	left(a2, 20)
connection default;
rollback;
drop table worklog5743_1;
drop table worklog5743_2;
drop table worklog5743_4;
drop table worklog5743_8;
drop table worklog5743_16;
### Test 5 ###
create table worklog5743(a1 int,
a2 varchar(20000),
a3 varchar(3073),
a4 varchar(3072),
a5 varchar(3069),
a6 varchar(3068))
ROW_FORMAT=DYNAMIC;
SET sql_mode='';
create index idx1 on worklog5743(a2);
Warnings:
Note	1071	Specified key was too long; max key length is 3072 bytes
create index idx2 on worklog5743(a3);
Warnings:
Note	1071	Specified key was too long; max key length is 3072 bytes
create index idx3 on worklog5743(a4);
show warnings;
Level	Code	Message
SET sql_mode= default;
create index idx4 on worklog5743(a1, a2);
ERROR 42000: Specified key was too long; max key length is 3072 bytes
show warnings;
Level	Code	Message
Note	1071	Specified key was too long; max key length is 3072 bytes
Error	1071	Specified key was too long; max key length is 3072 bytes
create index idx5 on worklog5743(a1, a5);
ERROR 42000: Specified key was too long; max key length is 3072 bytes
show warnings;
Level	Code	Message
Error	1071	Specified key was too long; max key length is 3072 bytes
create index idx6 on worklog5743(a1, a6);
show warnings;
Level	Code	Message
show create table worklog5743;
Table	Create Table
worklog5743	CREATE TABLE `worklog5743` (
  `a1` int(11) DEFAULT NULL,
  `a2` varchar(20000) DEFAULT NULL,
  `a3` varchar(3073) DEFAULT NULL,
  `a4` varchar(3072) DEFAULT NULL,
  `a5` varchar(3069) DEFAULT NULL,
  `a6` varchar(3068) DEFAULT NULL,
  KEY `idx1` (`a2`(3072)),
  KEY `idx2` (`a3`(3072)),
  KEY `idx3` (`a4`),
  KEY `idx6` (`a1`,`a6`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=DYNAMIC
insert into worklog5743 values(9,
repeat("a", 20000), repeat("a", 3073),
repeat("a", 3072), repeat("a", 3069),
repeat("a", 3068));
begin;
update worklog5743 set a1 = 1000;
connection con1;
select @@session.tx_isolation;
@@session.tx_isolation
REPEATABLE-READ
explain select a1 from worklog5743 where a1 = 9;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	worklog5743	ref	idx6	idx6	5	const	1	Using index
select a1 from worklog5743 where a1 = 9;
a1
9
connection con2;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
select @@session.tx_isolation;
@@session.tx_isolation
READ-UNCOMMITTED
select a1 from worklog5743 where a1 = 9;
a1
connection default;
rollback;
drop table worklog5743;
### Test 6 ###
create table worklog5743(a TEXT not null, primary key (a(1000)))
row_format=compact;
ERROR HY000: Index column size too large. The maximum column size is 767 bytes
create table worklog5743(a TEXT)
row_format=compact;
create index idx on worklog5743(a(768));
ERROR HY000: Index column size too large. The maximum column size is 767 bytes
create index idx on worklog5743(a(767));
insert into worklog5743 values(repeat("a", 20000));
begin;
insert into worklog5743 values(repeat("b", 20000));
update worklog5743 set a = (repeat("x", 25000));
select @@session.tx_isolation;
@@session.tx_isolation
REPEATABLE-READ
connection con1;
select a = repeat("a", 20000) from worklog5743;
a = repeat("a", 20000)
1
disconnect con1;
connection con2;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
select @@session.tx_isolation;
@@session.tx_isolation
READ-UNCOMMITTED
select a = repeat("x", 25000) from worklog5743;
a = repeat("x", 25000)
1
1
disconnect con2;
connection default;
rollback;
drop table worklog5743;
### Test 7 ###
create table worklog5743(a TEXT not null) ROW_FORMAT=DYNAMIC;
SET sql_mode='';
create index idx1 on worklog5743(a(3073));
Warnings:
Note	1071	Specified key was too long; max key length is 3072 bytes
create index idx2 on worklog5743(a(3072));
Warnings:
Note	1831	Duplicate index `idx2`. This is deprecated and will be disallowed in a future release
show create table worklog5743;
Table	Create Table
worklog5743	CREATE TABLE `worklog5743` (
  `a` text NOT NULL,
  KEY `idx1` (`a`(3072)),
  KEY `idx2` (`a`(3072))
) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=DYNAMIC
drop table worklog5743;
SET sql_mode= default;
create table worklog5743(a TEXT not null) ROW_FORMAT=REDUNDANT;
create index idx on worklog5743(a(768));
ERROR HY000: Index column size too large. The maximum column size is 767 bytes
create index idx2 on worklog5743(a(767));
drop table worklog5743;
create table worklog5743(a TEXT not null) ROW_FORMAT=COMPACT;
create index idx on worklog5743(a(768));
ERROR HY000: Index column size too large. The maximum column size is 767 bytes
create index idx2 on worklog5743(a(767));
drop table worklog5743;
SET GLOBAL innodb_file_per_table=1;