Implement worklog #5743 InnoDB: Lift the limit of index key prefixes.

With this change, the index prefix column length lifted from 767 bytes
to 3072 bytes if "innodb_large_prefix" is set to "true".

rb://603 approved by Marko

5 files changed, 529 insertions, 71 deletions

diff --git a/mysql-test/suite/innodb/r/innodb-index.result b/mysql-test/suite/innodb/r/innodb-index.result
index e43f70a2365..7d7062c9161 100644
--- a/mysql-test/suite/innodb/r/innodb-index.result
+++ b/mysql-test/suite/innodb/r/innodb-index.result
@@ -842,31 +842,31 @@ create table t1(a blob,b blob,c blob,d blob,e blob,f blob,g blob,h blob,
 i blob,j blob,k blob,l blob,m blob,n blob,o blob,p blob,
 q blob,r blob,s blob,t blob,u blob)
 engine=innodb row_format=dynamic;
-create index t1a on t1 (a(1));
-create index t1b on t1 (b(1));
-create index t1c on t1 (c(1));
-create index t1d on t1 (d(1));
-create index t1e on t1 (e(1));
-create index t1f on t1 (f(1));
-create index t1g on t1 (g(1));
-create index t1h on t1 (h(1));
-create index t1i on t1 (i(1));
-create index t1j on t1 (j(1));
-create index t1k on t1 (k(1));
-create index t1l on t1 (l(1));
-create index t1m on t1 (m(1));
-create index t1n on t1 (n(1));
-create index t1o on t1 (o(1));
-create index t1p on t1 (p(1));
-create index t1q on t1 (q(1));
-create index t1r on t1 (r(1));
-create index t1s on t1 (s(1));
-create index t1t on t1 (t(1));
-create index t1u on t1 (u(1));
+create index t1a on t1 (a(767));
+create index t1b on t1 (b(767));
+create index t1c on t1 (c(767));
+create index t1d on t1 (d(767));
+create index t1e on t1 (e(767));
+create index t1f on t1 (f(767));
+create index t1g on t1 (g(767));
+create index t1h on t1 (h(767));
+create index t1i on t1 (i(767));
+create index t1j on t1 (j(767));
+create index t1k on t1 (k(767));
+create index t1l on t1 (l(767));
+create index t1m on t1 (m(767));
+create index t1n on t1 (n(767));
+create index t1o on t1 (o(767));
+create index t1p on t1 (p(767));
+create index t1q on t1 (q(767));
+create index t1r on t1 (r(767));
+create index t1s on t1 (s(767));
+create index t1t on t1 (t(767));
+create index t1u on t1 (u(767));
 ERROR HY000: Too big row
-create index t1ut on t1 (u(1), t(1));
+create index t1ut on t1 (u(767), t(767));
 ERROR HY000: Too big row
-create index t1st on t1 (s(1), t(1));
+create index t1st on t1 (s(767), t(767));
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -891,32 +891,32 @@ t1	CREATE TABLE `t1` (
   `s` blob,
   `t` blob,
   `u` blob,
-  KEY `t1a` (`a`(1)),
-  KEY `t1b` (`b`(1)),
-  KEY `t1c` (`c`(1)),
-  KEY `t1d` (`d`(1)),
-  KEY `t1e` (`e`(1)),
-  KEY `t1f` (`f`(1)),
-  KEY `t1g` (`g`(1)),
-  KEY `t1h` (`h`(1)),
-  KEY `t1i` (`i`(1)),
-  KEY `t1j` (`j`(1)),
-  KEY `t1k` (`k`(1)),
-  KEY `t1l` (`l`(1)),
-  KEY `t1m` (`m`(1)),
-  KEY `t1n` (`n`(1)),
-  KEY `t1o` (`o`(1)),
-  KEY `t1p` (`p`(1)),
-  KEY `t1q` (`q`(1)),
-  KEY `t1r` (`r`(1)),
-  KEY `t1s` (`s`(1)),
-  KEY `t1t` (`t`(1)),
-  KEY `t1st` (`s`(1),`t`(1))
+  KEY `t1a` (`a`(767)),
+  KEY `t1b` (`b`(767)),
+  KEY `t1c` (`c`(767)),
+  KEY `t1d` (`d`(767)),
+  KEY `t1e` (`e`(767)),
+  KEY `t1f` (`f`(767)),
+  KEY `t1g` (`g`(767)),
+  KEY `t1h` (`h`(767)),
+  KEY `t1i` (`i`(767)),
+  KEY `t1j` (`j`(767)),
+  KEY `t1k` (`k`(767)),
+  KEY `t1l` (`l`(767)),
+  KEY `t1m` (`m`(767)),
+  KEY `t1n` (`n`(767)),
+  KEY `t1o` (`o`(767)),
+  KEY `t1p` (`p`(767)),
+  KEY `t1q` (`q`(767)),
+  KEY `t1r` (`r`(767)),
+  KEY `t1s` (`s`(767)),
+  KEY `t1t` (`t`(767)),
+  KEY `t1st` (`s`(767),`t`(767))
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=DYNAMIC
-create index t1u on t1 (u(1));
+create index t1u on t1 (u(767));
 ERROR HY000: Too big row
 alter table t1 row_format=compact;
-create index t1u on t1 (u(1));
+create index t1u on t1 (u(767));
 drop table t1;
 set global innodb_file_per_table=0;
 set global innodb_file_format=Antelope;
diff --git a/mysql-test/suite/innodb/r/innodb_index_large_prefix.result b/mysql-test/suite/innodb/r/innodb_index_large_prefix.result
new file mode 100644
index 00000000000..6e2d3527ee9
--- /dev/null
+++ b/mysql-test/suite/innodb/r/innodb_index_large_prefix.result
@@ -0,0 +1,185 @@
+set global innodb_file_format="Barracuda";
+set global innodb_file_per_table=1;
+set global innodb_large_prefix=1;
+create table worklog5743(a TEXT not null, primary key (a(1000)))
+ROW_FORMAT=DYNAMIC, engine = innodb;
+insert into worklog5743 values(repeat("a", 20000));
+update worklog5743 set a = (repeat("b", 16000));
+create index idx on worklog5743(a(2000));
+begin;
+update worklog5743 set a = (repeat("x", 17000));
+select @@session.tx_isolation;
+@@session.tx_isolation
+REPEATABLE-READ
+select a = repeat("x", 17000) from worklog5743;
+a = repeat("x", 17000)
+0
+select a = repeat("b", 16000) from worklog5743;
+a = repeat("b", 16000)
+1
+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
+rollback;
+drop table worklog5743;
+create table worklog5743(a1 int, a2 TEXT not null)
+ROW_FORMAT=DYNAMIC, engine = innodb;
+create index idx on worklog5743(a1, a2(2000));
+insert into worklog5743 values(9, repeat("a", 10000));
+begin;
+update worklog5743 set a1 = 1000;
+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	Using where
+select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
+a1	a2 = repeat("a", 10000)
+9	1
+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)
+rollback;
+drop table worklog5743;
+create table worklog5743(a1 int, a2 TEXT not null)
+ROW_FORMAT=DYNAMIC, engine = innodb;
+create index idx on worklog5743(a1, a2(50));
+insert into worklog5743 values(9, repeat("a", 10000));
+begin;
+update worklog5743 set a1 = 1000;
+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	Using where
+select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
+a1	a2 = repeat("a", 10000)
+9	1
+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)
+rollback;
+drop table worklog5743;
+create table worklog5743_2(a1 int, a2 TEXT not null)
+ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=2, engine = innodb;
+create table worklog5743_4(a1 int, a2 TEXT not null)
+ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=4, engine = innodb;
+create index idx1 on worklog5743_2(a1, a2(942));
+ERROR HY000: Too big row
+create index idx1 on worklog5743_2(a1, a2(940));
+create index idx1 on worklog5743_4(a1, a2(1966));
+ERROR HY000: Too big row
+create index idx1 on worklog5743_4(a1, a2(1964));
+insert into worklog5743_2 values(9, repeat("a", 10000));
+insert into worklog5743_4 values(9, repeat("a", 10000));
+begin;
+update worklog5743_2 set a1 = 1000;
+update worklog5743_4 set a1 = 1000;
+select @@session.tx_isolation;
+@@session.tx_isolation
+REPEATABLE-READ
+explain select a1, a2 = repeat("a", 10000) from worklog5743_2 where a1 = 9;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	worklog5743_2	ref	idx1	idx1	5	const	1	Using where
+select a1, a2 = repeat("a", 10000) from worklog5743_2 where a1 = 9;
+a1	a2 = repeat("a", 10000)
+9	1
+select a1, a2 = repeat("a", 10000) from worklog5743_4 where a1 = 9;
+a1	a2 = repeat("a", 10000)
+9	1
+SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
+select @@session.tx_isolation;
+@@session.tx_isolation
+READ-UNCOMMITTED
+select a1, a2 = repeat("a", 10000) from worklog5743_2 where a1 = 9;
+a1	a2 = repeat("a", 10000)
+select a1, a2 = repeat("a", 10000) from worklog5743_4 where a1 = 9;
+a1	a2 = repeat("a", 10000)
+rollback;
+drop table worklog5743_2;
+drop table worklog5743_4;
+create table worklog5743(a1 int, a2 varchar(3000))
+ROW_FORMAT=DYNAMIC, engine = innodb;
+create index idx on worklog5743(a1, a2);
+insert into worklog5743 values(9, repeat("a", 3000));
+begin;
+update worklog5743 set a1 = 1000;
+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	idx	idx	5	const	1	Using where; Using index
+select a1 from worklog5743 where a1 = 9;
+a1
+9
+SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
+select @@session.tx_isolation;
+@@session.tx_isolation
+READ-UNCOMMITTED
+select a1 from worklog5743 where a1 = 9;
+a1
+rollback;
+drop table worklog5743;
+create table worklog5743(a TEXT not null, primary key (a(1000)))
+engine = innodb;
+ERROR HY000: Index column size too large. The maximum column size is 767 bytes.
+create table worklog5743(a TEXT) engine = innodb;
+create index idx on worklog5743(a(1000));
+ERROR HY000: Index column size too large. The maximum column size is 767 bytes.
+create index idx on worklog5743(a(725));
+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
+select a = repeat("a", 20000) from worklog5743;
+a = repeat("a", 20000)
+1
+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
+rollback;
+drop table worklog5743;
+create table worklog5743(a TEXT not null) ROW_FORMAT=DYNAMIC, engine = innodb;
+create index idx on worklog5743(a(3073));
+Warnings:
+Warning	1071	Specified key was too long; max key length is 3072 bytes
+Warning	1071	Specified key was too long; max key length is 3072 bytes
+create index idx2 on worklog5743(a(3072));
+show create table worklog5743;
+Table	Create Table
+worklog5743	CREATE TABLE `worklog5743` (
+  `a` text NOT NULL,
+  KEY `idx` (`a`(3072)),
+  KEY `idx2` (`a`(3072))
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=DYNAMIC
+drop table worklog5743;
+create table worklog5743(a TEXT not null) engine = innodb;
+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_format=Antelope;
+SET GLOBAL innodb_file_per_table=0;
+SET GLOBAL innodb_file_format_max=Antelope;
+SET GLOBAL innodb_large_prefix=0;
diff --git a/mysql-test/suite/innodb/t/innodb-index.test b/mysql-test/suite/innodb/t/innodb-index.test
index 05d1d37c422..baeeb240c06 100644
--- a/mysql-test/suite/innodb/t/innodb-index.test
+++ b/mysql-test/suite/innodb/t/innodb-index.test
@@ -369,36 +369,36 @@ create table t1(a blob,b blob,c blob,d blob,e blob,f blob,g blob,h blob,
 		i blob,j blob,k blob,l blob,m blob,n blob,o blob,p blob,
 		q blob,r blob,s blob,t blob,u blob)
 	engine=innodb row_format=dynamic;
-create index t1a on t1 (a(1));
-create index t1b on t1 (b(1));
-create index t1c on t1 (c(1));
-create index t1d on t1 (d(1));
-create index t1e on t1 (e(1));
-create index t1f on t1 (f(1));
-create index t1g on t1 (g(1));
-create index t1h on t1 (h(1));
-create index t1i on t1 (i(1));
-create index t1j on t1 (j(1));
-create index t1k on t1 (k(1));
-create index t1l on t1 (l(1));
-create index t1m on t1 (m(1));
-create index t1n on t1 (n(1));
-create index t1o on t1 (o(1));
-create index t1p on t1 (p(1));
-create index t1q on t1 (q(1));
-create index t1r on t1 (r(1));
-create index t1s on t1 (s(1));
-create index t1t on t1 (t(1));
+create index t1a on t1 (a(767));
+create index t1b on t1 (b(767));
+create index t1c on t1 (c(767));
+create index t1d on t1 (d(767));
+create index t1e on t1 (e(767));
+create index t1f on t1 (f(767));
+create index t1g on t1 (g(767));
+create index t1h on t1 (h(767));
+create index t1i on t1 (i(767));
+create index t1j on t1 (j(767));
+create index t1k on t1 (k(767));
+create index t1l on t1 (l(767));
+create index t1m on t1 (m(767));
+create index t1n on t1 (n(767));
+create index t1o on t1 (o(767));
+create index t1p on t1 (p(767));
+create index t1q on t1 (q(767));
+create index t1r on t1 (r(767));
+create index t1s on t1 (s(767));
+create index t1t on t1 (t(767));
 --error 139
-create index t1u on t1 (u(1));
+create index t1u on t1 (u(767));
 --error 139
-create index t1ut on t1 (u(1), t(1));
-create index t1st on t1 (s(1), t(1));
+create index t1ut on t1 (u(767), t(767));
+create index t1st on t1 (s(767), t(767));
 show create table t1;
 --error 139
-create index t1u on t1 (u(1));
+create index t1u on t1 (u(767));
 alter table t1 row_format=compact;
-create index t1u on t1 (u(1));
+create index t1u on t1 (u(767));
 
 drop table t1;
 eval set global innodb_file_per_table=$per_table;
diff --git a/mysql-test/suite/innodb/t/innodb_index_large_prefix.test b/mysql-test/suite/innodb/t/innodb_index_large_prefix.test
new file mode 100644
index 00000000000..3ed8aa6e096
--- /dev/null
+++ b/mysql-test/suite/innodb/t/innodb_index_large_prefix.test
@@ -0,0 +1,271 @@
+# Testcase for worklog #5743: Lift the limit of index key prefixes
+
+--source include/have_innodb.inc
+
+let $innodb_file_format_orig=`select @@innodb_file_format`;
+let $innodb_file_per_table_orig=`select @@innodb_file_per_table`;
+let $innodb_file_format_max_orig=`select @@innodb_file_format_max`;
+let $innodb_large_prefix_orig=`select @@innodb_large_prefix`;
+
+set global innodb_file_format="Barracuda";
+set global innodb_file_per_table=1;
+set global innodb_large_prefix=1;
+
+# Create a table of DYNAMIC format, with a primary index of 1000 bytes in
+# size
+create table worklog5743(a TEXT not null, primary key (a(1000)))
+ROW_FORMAT=DYNAMIC, engine = innodb;
+
+# Do some insertion and update to excercise the external cache
+# code path
+insert into worklog5743 values(repeat("a", 20000));
+
+# default session, update the table
+update worklog5743 set a = (repeat("b", 16000));
+
+# Create a secondary index
+create index idx on worklog5743(a(2000));
+
+# Start a few sessions to do selections on table being updated in default
+# session, so it would rebuild the previous version from undo log.
+# 1) Default session:	Initiate an update on the externally stored column
+# 2) Session con1:	Select from table with repeated read
+# 3) Session con2:	Select from table with read uncommitted
+# 4) Default session:	rollback updates
+
+begin;
+update worklog5743 set a = (repeat("x", 17000));
+
+# Start a new session to select the column to force it build
+# an earlier version of the clustered index through undo log. So it should
+# just see the result of repeat("b", 16000)
+select @@session.tx_isolation;
+--connect (con1,localhost,root,,)
+select a = repeat("x", 17000) from worklog5743;
+select a = repeat("b", 16000) from worklog5743;
+
+# Start another session doing "read uncommitted" query, it
+# should see the uncommitted update
+--connect (con2,localhost,root,,)
+SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
+select @@session.tx_isolation;
+select a = repeat("x", 17000) from worklog5743;
+
+# Roll back the transaction
+--connection default
+rollback;
+
+drop table worklog5743;
+
+# Create a table with only a secondary index has large prefix column
+create table worklog5743(a1 int, a2 TEXT not null)
+ROW_FORMAT=DYNAMIC, engine = innodb;
+
+create index idx on worklog5743(a1, a2(2000));
+
+insert into worklog5743 values(9, repeat("a", 10000));
+
+begin;
+
+update worklog5743 set a1 = 1000;
+
+# Do a select from another connection that would use the secondary index
+--connection con1
+select @@session.tx_isolation;
+explain select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
+select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
+
+# Do read uncommitted in another session, it would show there is no
+# row with a1 = 9
+--connection con2
+SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
+select @@session.tx_isolation;
+select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
+
+--connection default
+rollback;
+
+drop table worklog5743;
+
+# Create a table with a secondary index has small (50 bytes) prefix column
+create table worklog5743(a1 int, a2 TEXT not null)
+ROW_FORMAT=DYNAMIC, engine = innodb;
+
+create index idx on worklog5743(a1, a2(50));
+
+insert into worklog5743 values(9, repeat("a", 10000));
+
+begin;
+
+update worklog5743 set a1 = 1000;
+
+# Do a select from another connection that would use the secondary index
+--connection con1
+select @@session.tx_isolation;
+explain select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
+select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
+
+# Do read uncommitted in another session, it would show there is no
+# row with a1 = 9
+--connection con2
+SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
+select @@session.tx_isolation;
+select a1, a2 = repeat("a", 10000) from worklog5743 where a1 = 9;
+
+--connection default
+rollback;
+
+drop table worklog5743;
+
+# Create a table of ROW_FORMAT=COMPRESSED format
+create table worklog5743_2(a1 int, a2 TEXT not null)
+ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=2, engine = innodb;
+
+create table worklog5743_4(a1 int, a2 TEXT not null)
+ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=4, engine = innodb;
+
+# The maximum overall index record (not prefix) length for this table
+# is page_zip_empty_size() / 2, which is 960. "Too big row" error (
+# HA_ERR_TO_BIG_ROW) will be printed if this limit is exceeded.
+# Considering other fields and their overhead, the maximum length
+# for column a2 is 940 or 941 depending on the zlib version used and
+# compressBound() value used in page_zip_empty_size() (please refer
+# to Bug #47495 for more detail).
+-- error 139
+create index idx1 on worklog5743_2(a1, a2(942));
+
+create index idx1 on worklog5743_2(a1, a2(940));
+
+# similarly, the maximum index record length for the table is
+# 1984. Considering other fields and their overhead, the
+# maximum length for column a2 is 1964 or 1965 (please refer
+# to Bug #47495 for more detail).
+-- error 139
+create index idx1 on worklog5743_4(a1, a2(1966));
+
+create index idx1 on worklog5743_4(a1, a2(1964));
+
+insert into worklog5743_2 values(9, repeat("a", 10000));
+insert into worklog5743_4 values(9, repeat("a", 10000));
+
+begin;
+
+update worklog5743_2 set a1 = 1000;
+update worklog5743_4 set a1 = 1000;
+
+# Do a select from another connection that would use the secondary index
+--connection con1
+select @@session.tx_isolation;
+explain select a1, a2 = repeat("a", 10000) from worklog5743_2 where a1 = 9;
+select a1, a2 = repeat("a", 10000) from worklog5743_2 where a1 = 9;
+select a1, a2 = repeat("a", 10000) from worklog5743_4 where a1 = 9;
+
+# Do read uncommitted in another session, it would show there is no
+# row with a1 = 9
+--connection con2
+SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
+select @@session.tx_isolation;
+select a1, a2 = repeat("a", 10000) from worklog5743_2 where a1 = 9;
+select a1, a2 = repeat("a", 10000) from worklog5743_4 where a1 = 9;
+
+--connection default
+rollback;
+
+drop table worklog5743_2;
+drop table worklog5743_4;
+
+# Create a table with varchar column, and create index directly on this
+# large column (without prefix)
+create table worklog5743(a1 int, a2 varchar(3000))
+ROW_FORMAT=DYNAMIC, engine = innodb;
+
+# Create an index with large column without prefix
+create index idx on worklog5743(a1, a2);
+
+insert into worklog5743 values(9, repeat("a", 3000));
+
+begin;
+
+update worklog5743 set a1 = 1000;
+
+# Do a select from another connection that would use the secondary index
+--connection con1
+select @@session.tx_isolation;
+explain select a1 from worklog5743 where a1 = 9;
+select a1 from worklog5743 where a1 = 9;
+
+# Do read uncommitted, it would show there is no row with a1 = 9
+--connection con2
+SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
+select @@session.tx_isolation;
+select a1 from worklog5743 where a1 = 9;
+
+--connection default
+rollback;
+
+drop table worklog5743;
+
+# Create a table with old format, and the limit is 768 bytes.
+-- error ER_INDEX_COLUMN_TOO_LONG
+create table worklog5743(a TEXT not null, primary key (a(1000)))
+engine = innodb;
+
+create table worklog5743(a TEXT) engine = innodb;
+
+# Excercise the column length check in ha_innobase::add_index()
+-- error ER_INDEX_COLUMN_TOO_LONG
+create index idx on worklog5743(a(1000));
+
+# This should be successful
+create index idx on worklog5743(a(725));
+
+# Perform some DMLs
+insert into worklog5743 values(repeat("a", 20000));
+
+begin;
+insert into worklog5743 values(repeat("b", 20000));
+update worklog5743 set a = (repeat("x", 25000));
+
+# Start a new session to select the table to force it build
+# an earlier version of the cluster index through undo log
+select @@session.tx_isolation;
+--connection con1
+select a = repeat("a", 20000) from worklog5743;
+
+--connection con2
+SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
+select @@session.tx_isolation;
+select a = repeat("x", 25000) from worklog5743;
+
+--connection default
+rollback;
+
+drop table worklog5743;
+
+# Some border line test on the column length.
+# We have a limit of 3072 bytes for Barracuda table
+create table worklog5743(a TEXT not null) ROW_FORMAT=DYNAMIC, engine = innodb;
+
+# Length exceeds maximum supported key length, will auto-truncated to 3072
+create index idx on worklog5743(a(3073));
+
+create index idx2 on worklog5743(a(3072));
+
+show create table worklog5743;
+
+drop table worklog5743;
+
+# We have a limit of 767 bytes for Antelope table
+create table worklog5743(a TEXT not null) engine = innodb;
+
+-- error ER_INDEX_COLUMN_TOO_LONG
+create index idx on worklog5743(a(768));
+
+create index idx2 on worklog5743(a(767));
+
+drop table worklog5743;
+
+eval SET GLOBAL innodb_file_format=$innodb_file_format_orig;
+eval SET GLOBAL innodb_file_per_table=$innodb_file_per_table_orig;
+eval SET GLOBAL innodb_file_format_max=$innodb_file_format_max_orig;
+eval SET GLOBAL innodb_large_prefix=$innodb_large_prefix_orig;
diff --git a/mysql-test/suite/sys_vars/r/all_vars.result b/mysql-test/suite/sys_vars/r/all_vars.result
index fae91659ecd..3cee368853f 100644
--- a/mysql-test/suite/sys_vars/r/all_vars.result
+++ b/mysql-test/suite/sys_vars/r/all_vars.result
@@ -14,8 +14,10 @@ There should be *no* variables listed below:
 INNODB_ROLLBACK_SEGMENTS
 INNODB_STATS_METHOD
 INNODB_FILE_FORMAT_MAX
+INNODB_LARGE_PREFIX
 INNODB_ROLLBACK_SEGMENTS
 INNODB_STATS_METHOD
 INNODB_FILE_FORMAT_MAX
+INNODB_LARGE_PREFIX
 drop table t1;
 drop table t2;