# 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_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_large_prefix=$innodb_large_prefix_orig;