mariadb/mysql-test/t/alter_table.test

#
# Test of alter table
#
--disable_warnings
drop table if exists t1,t2;
drop database if exists mysqltest;
--enable_warnings

create table t1 (
col1 int not null auto_increment primary key,
col2 varchar(30) not null,
col3 varchar (20) not null,
col4 varchar(4) not null,
col5 enum('PENDING', 'ACTIVE', 'DISABLED') not null,
col6 int not null, to_be_deleted int);
insert into t1 values (2,4,3,5,"PENDING",1,7);
alter table t1
add column col4_5 varchar(20) not null after col4,
add column col7 varchar(30) not null after col5,
add column col8 datetime not null, drop column to_be_deleted,
change column col2 fourth varchar(30) not null after col3,
modify column col6 int not null first;
select * from t1;
drop table t1;

create table t1 (bandID MEDIUMINT UNSIGNED NOT NULL PRIMARY KEY, payoutID SMALLINT UNSIGNED NOT NULL);
insert into t1 (bandID,payoutID) VALUES (1,6),(2,6),(3,4),(4,9),(5,10),(6,1),(7,12),(8,12);
alter table t1 add column new_col int, order by payoutid,bandid;
select * from t1;
alter table t1 order by bandid,payoutid;
select * from t1;
drop table t1;

# Check that pack_keys and dynamic length rows are not forced. 

CREATE TABLE t1 (
GROUP_ID int(10) unsigned DEFAULT '0' NOT NULL,
LANG_ID smallint(5) unsigned DEFAULT '0' NOT NULL,
NAME varchar(80) DEFAULT '' NOT NULL,
PRIMARY KEY (GROUP_ID,LANG_ID),
KEY NAME (NAME));
#show table status like "t1";
ALTER TABLE t1 CHANGE NAME NAME CHAR(80) not null;
--replace_column 8 #
SHOW FULL COLUMNS FROM t1;
DROP TABLE t1;

#
# Test of ALTER TABLE ... ORDER BY
#

create table t1 (n int);
insert into t1 values(9),(3),(12),(10);
alter table t1 order by n;
select * from t1;
drop table t1;

CREATE TABLE t1 (
  id int(11) unsigned NOT NULL default '0',
  category_id tinyint(4) unsigned NOT NULL default '0',
  type_id tinyint(4) unsigned NOT NULL default '0',
  body text NOT NULL,
  user_id int(11) unsigned NOT NULL default '0',
  status enum('new','old') NOT NULL default 'new',
  PRIMARY KEY (id)
) ENGINE=MyISAM;

ALTER TABLE t1 ORDER BY t1.id, t1.status, t1.type_id, t1.user_id, t1.body;
DROP TABLE t1;

#
# The following combination found a hang-bug in MyISAM
#

CREATE TABLE t1 (AnamneseId int(10) unsigned NOT NULL auto_increment,B BLOB,PRIMARY KEY (AnamneseId)) engine=myisam;
insert into t1 values (null,"hello");
LOCK TABLES t1 WRITE;
ALTER TABLE t1 ADD Column new_col int not null;
UNLOCK TABLES;
OPTIMIZE TABLE t1;
DROP TABLE t1;

#
# Drop and add an auto_increment column
#

create table t1 (i int unsigned not null auto_increment primary key);
insert into t1 values (null),(null),(null),(null);
alter table t1 drop i,add i int unsigned not null auto_increment, drop primary key, add primary key (i);
select * from t1;
drop table t1;

#
# Bug #2628: 'alter table t1 rename mysqltest.t1' silently drops mysqltest.t1 
# if it exists
#
create table t1 (name char(15));
insert into t1 (name) values ("current");
create database mysqltest;
create table mysqltest.t1 (name char(15));
insert into mysqltest.t1 (name) values ("mysqltest");
select * from t1;
select * from mysqltest.t1;
--error ER_TABLE_EXISTS_ERROR
alter table t1 rename mysqltest.t1;
select * from t1;
select * from mysqltest.t1;
drop table t1;
drop database mysqltest;

#
# ALTER TABLE ... ENABLE/DISABLE KEYS

create table t1 (n1 int not null, n2 int, n3 int, n4 float,
                unique(n1),
                key (n1, n2, n3, n4),
                key (n2, n3, n4, n1),
                key (n3, n4, n1, n2),
                key (n4, n1, n2, n3) );
alter table t1 disable keys;
show keys from t1;
#let $1=10000;
let $1=10;
while ($1)
{
 eval insert into t1 values($1,RAND()*1000,RAND()*1000,RAND());
 dec $1;
}
alter table t1 enable keys;
show keys from t1;
drop table t1;

#
# Alter table and rename
#

create table t1 (i int unsigned not null auto_increment primary key);
alter table t1 rename t2;
alter table t2 rename t1, add c char(10) comment "no comment";
show columns from t1;
drop table t1;

# implicit analyze

create table t1 (a int, b int);
let $1=100;
while ($1)
{
 eval insert into t1 values(1,$1), (2,$1), (3, $1);
 dec $1;
}
alter table t1 add unique (a,b), add key (b);
show keys from t1;
analyze table t1;
show keys from t1;
drop table t1;

#
# Test of ALTER TABLE DELAYED
#

CREATE TABLE t1 (i int(10), index(i) );
ALTER TABLE t1 DISABLE KEYS;
INSERT DELAYED INTO t1 VALUES(1),(2),(3);
ALTER TABLE t1 ENABLE KEYS;
drop table t1;

#
# Test ALTER TABLE ENABLE/DISABLE keys when things are locked
#

CREATE TABLE t1 (
  Host varchar(16) binary NOT NULL default '',
  User varchar(16) binary NOT NULL default '',
  PRIMARY KEY  (Host,User)
) ENGINE=MyISAM;

ALTER TABLE t1 DISABLE KEYS;
LOCK TABLES t1 WRITE;
INSERT INTO t1 VALUES ('localhost','root'),('localhost',''),('games','monty');
SHOW INDEX FROM t1;
ALTER TABLE t1 ENABLE KEYS;
UNLOCK TABLES;
CHECK TABLES t1;
DROP TABLE t1;

#
# Test with two keys
#

CREATE TABLE t1 (
  Host varchar(16) binary NOT NULL default '',
  User varchar(16) binary NOT NULL default '',
  PRIMARY KEY  (Host,User),
  KEY  (Host)
) ENGINE=MyISAM;

ALTER TABLE t1 DISABLE KEYS;
SHOW INDEX FROM t1;
LOCK TABLES t1 WRITE;
INSERT INTO t1 VALUES ('localhost','root'),('localhost','');
SHOW INDEX FROM t1;
ALTER TABLE t1 ENABLE KEYS;
SHOW INDEX FROM t1;
UNLOCK TABLES;
CHECK TABLES t1;

# Test RENAME with LOCK TABLES
LOCK TABLES t1 WRITE;
ALTER TABLE t1 RENAME t2;
UNLOCK TABLES;
select * from t2;
DROP TABLE t2;

#
# Test disable keys with locking
#
CREATE TABLE t1 (
  Host varchar(16) binary NOT NULL default '',
  User varchar(16) binary NOT NULL default '',
  PRIMARY KEY  (Host,User),
  KEY  (Host)
) ENGINE=MyISAM;

LOCK TABLES t1 WRITE;
ALTER TABLE t1 DISABLE KEYS;
SHOW INDEX FROM t1;
DROP TABLE t1;

#
# BUG#4717 - check for valid table names
#
create table t1 (a int);
--error ER_WRONG_TABLE_NAME
alter table t1 rename to ``;
--error ER_WRONG_TABLE_NAME
rename table t1 to ``;
drop table t1;

#
# BUG#6236 - ALTER TABLE MODIFY should set implicit NOT NULL on PK columns
#
drop table if exists t1, t2;
create table t1 ( a varchar(10) not null primary key ) engine=myisam;
create table t2 ( a varchar(10) not null primary key ) engine=merge union=(t1);
flush tables;
alter table t1 modify a varchar(10);
show create table t2;
flush tables;
alter table t1 modify a varchar(10) not null;
show create table t2;
drop table if exists t1, t2;

# The following is also part of bug #6236 (CREATE TABLE didn't properly count
# not null columns for primary keys)

create table t1 (a int, b int, c int, d int, e int, f int, g int, h int,i int, primary key (a,b,c,d,e,f,g,i,h)) engine=MyISAM;
insert into t1 (a) values(1);
--replace_column 7 X 8 X 9 X 10 X 11 X 12 X 13 X 14 X
show table status like 't1';
alter table t1 modify a int;
--replace_column 7 X 8 X 9 X 10 X 11 X 12 X 13 X 14 X
show table status like 't1';
drop table t1;
create table t1 (a int not null, b int not null, c int not null, d int not null, e int not null, f int not null, g int not null, h int not null,i int not null, primary key (a,b,c,d,e,f,g,i,h)) engine=MyISAM;
insert into t1 (a) values(1);
--replace_column 7 X 8 X 9 X 10 X 11 X 12 X 13 X 14 X
show table status like 't1';
drop table t1;

#
# Test that data get converted when character set is changed
# Test that data doesn't get converted when src or dst is BINARY/BLOB
#
set names koi8r;
create table t1 (a char(10) character set koi8r);
insert into t1 values ('<27><><EFBFBD><EFBFBD>');
select a,hex(a) from t1;
alter table t1 change a a char(10) character set cp1251;
select a,hex(a) from t1;
alter table t1 change a a binary(4);
select a,hex(a) from t1;
alter table t1 change a a char(10) character set cp1251;
select a,hex(a) from t1;
alter table t1 change a a char(10) character set koi8r;
select a,hex(a) from t1;
alter table t1 change a a varchar(10) character set cp1251;
select a,hex(a) from t1;
alter table t1 change a a char(10) character set koi8r;
select a,hex(a) from t1;
alter table t1 change a a text character set cp1251;
select a,hex(a) from t1;
alter table t1 change a a char(10) character set koi8r;
select a,hex(a) from t1;
delete from t1;

#
# Test ALTER TABLE .. CHARACTER SET ..
#
show create table t1;
alter table t1 DEFAULT CHARACTER SET latin1;
show create table t1;
alter table t1 CONVERT TO CHARACTER SET latin1;
show create table t1;
alter table t1 DEFAULT CHARACTER SET cp1251;
show create table t1;

drop table t1;

#
# Bug#2821
# Test that table CHARACTER SET does not affect blobs
#
create table t1 (myblob longblob,mytext longtext) 
default charset latin1 collate latin1_general_cs;
show create table t1;
alter table t1 character set latin2;
show create table t1;
drop table t1;

#
# Bug 2361 (Don't drop UNIQUE with DROP PRIMARY KEY)
#

CREATE TABLE t1 (a int PRIMARY KEY, b INT UNIQUE);
ALTER TABLE t1 DROP PRIMARY KEY;
SHOW CREATE TABLE t1;
--error ER_CANT_DROP_FIELD_OR_KEY
ALTER TABLE t1 DROP PRIMARY KEY;
DROP TABLE t1;

# BUG#3899
create table t1 (a int, b int, key(a));
insert into t1 values (1,1), (2,2);
--error ER_CANT_DROP_FIELD_OR_KEY
alter table t1 drop key no_such_key;
alter table t1 drop key a;
drop table t1;

#
# BUG 12207 alter table ... discard table space on MyISAM table causes ERROR 2013 (HY000)
#
# Some platforms (Mac OS X, Windows) will send the error message using small letters.
CREATE TABLE T12207(a int) ENGINE=MYISAM;
--replace_result t12207 T12207
--error ER_ILLEGAL_HA
ALTER TABLE T12207 DISCARD TABLESPACE;
DROP TABLE T12207;

#
# Bug #6479  ALTER TABLE ... changing charset fails for TEXT columns
#
# The column's character set was changed but the actual data was not
# modified. In other words, the values were reinterpreted
# as UTF8 instead of being converted.
create table t1 (a text) character set koi8r;
insert into t1 values (_koi8r'<27><><EFBFBD><EFBFBD>');
select hex(a) from t1;
alter table t1 convert to character set cp1251;
select hex(a) from t1;
drop table t1;

#
# Test for bug #7884 "Able to add invalid unique index on TIMESTAMP prefix"
# MySQL should not think that packed field with non-zero decimals is
# geometry field and allow to create prefix index which is
# shorter than packed field length.
#
create table t1 ( a timestamp );
--error ER_WRONG_SUB_KEY
alter table t1 add unique ( a(1) );
drop table t1;

#
# Bug #24395: ALTER TABLE DISABLE KEYS doesn't work when modifying the table
#
# This problem happens if the data change is compatible.
# Changing to the same type is compatible for example.
#
--disable_warnings
drop table if exists t1;
--enable_warnings
create table t1 (a int, key(a));
show indexes from t1;
--echo "this used not to disable the index"
alter table t1 modify a int, disable keys;
show indexes from t1;

alter table t1 enable keys;
show indexes from t1;

alter table t1 modify a bigint, disable keys;
show indexes from t1;

alter table t1 enable keys;
show indexes from t1;

alter table t1 add b char(10), disable keys;
show indexes from t1;

alter table t1 add c decimal(10,2), enable keys;
show indexes from t1;

--echo "this however did"
alter table t1 disable keys;
show indexes from t1;

desc t1;

alter table t1 add d decimal(15,5);
--echo "The key should still be disabled"
show indexes from t1;

drop table t1;

--echo "Now will test with one unique index"
create table t1(a int, b char(10), unique(a));
show indexes from t1;
alter table t1 disable keys;
show indexes from t1;
alter table t1 enable keys;

--echo "If no copy on noop change, this won't touch the data file"
--echo "Unique index, no change"
alter table t1 modify a int, disable keys;
show indexes from t1;

--echo "Change the type implying data copy"
--echo "Unique index, no change"
alter table t1 modify a bigint, disable keys;
show indexes from t1;

alter table t1 modify a bigint;
show indexes from t1;

alter table t1 modify a int;
show indexes from t1;

drop table t1;

--echo "Now will test with one unique and one non-unique index"
create table t1(a int, b char(10), unique(a), key(b));
show indexes from t1;
alter table t1 disable keys;
show indexes from t1;
alter table t1 enable keys;


--echo "If no copy on noop change, this won't touch the data file"
--echo "The non-unique index will be disabled"
alter table t1 modify a int, disable keys;
show indexes from t1;
alter table t1 enable keys;
show indexes from t1;

--echo "Change the type implying data copy"
--echo "The non-unique index will be disabled"
alter table t1 modify a bigint, disable keys;
show indexes from t1;

--echo "Change again the type, but leave the indexes as_is"
alter table t1 modify a int;
show indexes from t1;
--echo "Try the same. When data is no copied on similar tables, this is noop"
alter table t1 modify a int;
show indexes from t1;

drop table t1;


#
# Bug#11493 - Alter table rename to default database does not work without
#             db name qualifying
#
create database mysqltest;
create table t1 (c1 int);
# Move table to other database.
alter table t1 rename mysqltest.t1;
# Assure that it has moved.
--error ER_BAD_TABLE_ERROR
drop table t1;
# Move table back.
alter table mysqltest.t1 rename t1;
# Assure that it is back.
drop table t1;
# Now test for correct message if no database is selected.
# Create t1 in 'test'.
create table t1 (c1 int);
# Change to other db.
use mysqltest;
# Drop the current db. This de-selects any db.
drop database mysqltest;
# Now test for correct message.
--error ER_NO_DB_ERROR
alter table test.t1 rename t1;
# Check that explicit qualifying works even with no selected db.
alter table test.t1 rename test.t1;
# Go back to standard 'test' db.
use test;
drop table t1;

#
# BUG#23404 - ROW_FORMAT=FIXED option is lost is an index is added to the
# table
#
CREATE TABLE t1(a INT) ROW_FORMAT=FIXED;
CREATE INDEX i1 ON t1(a);
SHOW CREATE TABLE t1;
DROP INDEX i1 ON t1;
SHOW CREATE TABLE t1;
DROP TABLE t1;

#
# Bug#24219 - ALTER TABLE ... RENAME TO ... , DISABLE KEYS leads to crash
#
--disable_warnings
DROP TABLE IF EXISTS bug24219;
DROP TABLE IF EXISTS bug24219_2;
--enable_warnings

CREATE TABLE bug24219 (a INT, INDEX(a));

SHOW INDEX FROM bug24219;

ALTER TABLE bug24219 RENAME TO bug24219_2, DISABLE KEYS;

SHOW INDEX FROM bug24219_2;

DROP TABLE bug24219_2;

#
# Bug#24562 (ALTER TABLE ... ORDER BY ... with complex expression asserts)
#

--disable_warnings
drop table if exists table_24562;
--enable_warnings

create table table_24562(
  section int,
  subsection int,
  title varchar(50));

insert into table_24562 values
(1, 0, "Introduction"),
(1, 1, "Authors"),
(1, 2, "Acknowledgements"),
(2, 0, "Basics"),
(2, 1, "Syntax"),
(2, 2, "Client"),
(2, 3, "Server"),
(3, 0, "Intermediate"),
(3, 1, "Complex queries"),
(3, 2, "Stored Procedures"),
(3, 3, "Stored Functions"),
(4, 0, "Advanced"),
(4, 1, "Replication"),
(4, 2, "Load balancing"),
(4, 3, "High availability"),
(5, 0, "Conclusion");

select * from table_24562;

alter table table_24562 add column reviewer varchar(20),
order by title;

select * from table_24562;

update table_24562 set reviewer="Me" where section=2;
update table_24562 set reviewer="You" where section=3;

alter table table_24562
order by section ASC, subsection DESC;

select * from table_24562;

alter table table_24562
order by table_24562.subsection ASC, table_24562.section DESC;

select * from table_24562;

--error ER_PARSE_ERROR
alter table table_24562 order by 12;
--error ER_PARSE_ERROR
alter table table_24562 order by (section + 12);
--error ER_PARSE_ERROR
alter table table_24562 order by length(title);
--error ER_PARSE_ERROR
alter table table_24562 order by (select 12 from dual);

--error ER_BAD_FIELD_ERROR
alter table table_24562 order by no_such_col;

drop table table_24562;

# End of 4.1 tests

#
# Bug #14693 (ALTER SET DEFAULT doesn't work)
#

create table t1 (mycol int(10) not null);
alter table t1 alter column mycol set default 0;
desc t1;
drop table t1;

#
# Some additional tests for new, faster alter table.  Note that most of the
# whole alter table code is being tested all around the test suite already.
#

create table t1 (v varchar(32));
insert into t1 values ('def'),('abc'),('hij'),('3r4f');
select * from t1;
# Fast alter, no copy performed
alter table t1 change v v2 varchar(32);
select * from t1;
# Fast alter, no copy performed
alter table t1 change v2 v varchar(64);
select * from t1;
update t1 set v = 'lmn' where v = 'hij';
select * from t1;
# Regular alter table
alter table t1 add i int auto_increment not null primary key first;
select * from t1;
update t1 set i=5 where i=3;
select * from t1;
alter table t1 change i i bigint;
select * from t1;
alter table t1 add unique key (i, v);
select * from t1 where i between 2 and 4 and v in ('def','3r4f','lmn');
drop table t1;

#
# Bug#6073 "ALTER table minor glich": ALTER TABLE complains that an index
# without # prefix is not allowed for TEXT columns, while index
# is defined with prefix.
# 
create table t1 (t varchar(255) default null, key t (t(80)))
engine=myisam default charset=latin1;
alter table t1 change t t text;
drop table t1;

#
# Bug #26794: Adding an index with a prefix on a SPATIAL type breaks ALTER
# TABLE
#
CREATE TABLE t1 (a varchar(500));

ALTER TABLE t1 ADD b GEOMETRY NOT NULL, ADD SPATIAL INDEX(b);
SHOW CREATE TABLE t1;
ALTER TABLE t1 ADD KEY(b(50));
SHOW CREATE TABLE t1;

ALTER TABLE t1 ADD c POINT;
SHOW CREATE TABLE t1;

--error ER_WRONG_SUB_KEY
CREATE TABLE t2 (a INT, KEY (a(20)));

ALTER TABLE t1 ADD d INT;
--error ER_WRONG_SUB_KEY
ALTER TABLE t1 ADD KEY (d(20));

# the 5.1 part of the test
--error ER_WRONG_SUB_KEY
ALTER TABLE t1 ADD e GEOMETRY NOT NULL, ADD SPATIAL KEY (e(30));

DROP TABLE t1;

#
# Bug#18038  MySQL server corrupts binary columns data
#

CREATE TABLE t1 (s CHAR(8) BINARY);
INSERT INTO t1 VALUES ('test');
SELECT LENGTH(s) FROM t1;
ALTER TABLE t1 MODIFY s CHAR(10) BINARY;
SELECT LENGTH(s) FROM t1;
DROP TABLE t1;

CREATE TABLE t1 (s BINARY(8));
INSERT INTO t1 VALUES ('test');
SELECT LENGTH(s) FROM t1;
SELECT HEX(s) FROM t1;
ALTER TABLE t1 MODIFY s BINARY(10);
SELECT HEX(s) FROM t1;
SELECT LENGTH(s) FROM t1;
DROP TABLE t1;

#
# Bug#19386: Multiple alter causes crashed table
# The trailing column would get corrupted data, or server could not even read
# it.
#

CREATE TABLE t1 (v VARCHAR(3), b INT);
INSERT INTO t1 VALUES ('abc', 5);
SELECT * FROM t1;
ALTER TABLE t1 MODIFY COLUMN v VARCHAR(4);
SELECT * FROM t1;
DROP TABLE t1;

# End of 5.0 tests

#
# Bug#18775 - Temporary table from alter table visible to other threads
#
# Check if special characters work and duplicates are detected.
--disable_warnings
DROP TABLE IF EXISTS `t+1`, `t+2`;
--enable_warnings
CREATE TABLE `t+1` (c1 INT);
ALTER TABLE  `t+1` RENAME `t+2`;
CREATE TABLE `t+1` (c1 INT);
--error ER_TABLE_EXISTS_ERROR
ALTER TABLE  `t+1` RENAME `t+2`;
DROP TABLE   `t+1`, `t+2`;
#
# Same for temporary tables though these names do not become file names.
CREATE TEMPORARY TABLE `tt+1` (c1 INT);
ALTER TABLE  `tt+1` RENAME `tt+2`;
CREATE TEMPORARY TABLE `tt+1` (c1 INT);
--error ER_TABLE_EXISTS_ERROR
ALTER TABLE  `tt+1` RENAME `tt+2`;
SHOW CREATE TABLE `tt+1`;
SHOW CREATE TABLE `tt+2`;
DROP TABLE   `tt+1`, `tt+2`;
#
# Check if special characters as in tmp_file_prefix work.
CREATE TABLE `#sql1` (c1 INT);
CREATE TABLE `@0023sql2` (c1 INT);
SHOW TABLES;
RENAME TABLE `#sql1`     TO `@0023sql1`;
RENAME TABLE `@0023sql2` TO `#sql2`;
SHOW TABLES;
ALTER TABLE `@0023sql1`  RENAME `#sql-1`;
ALTER TABLE `#sql2`      RENAME `@0023sql-2`;
SHOW TABLES;
INSERT INTO `#sql-1`     VALUES (1);
INSERT INTO `@0023sql-2` VALUES (2);
DROP TABLE `#sql-1`, `@0023sql-2`;
#
# Same for temporary tables though these names do not become file names.
CREATE TEMPORARY TABLE `#sql1` (c1 INT);
CREATE TEMPORARY TABLE `@0023sql2` (c1 INT);
SHOW TABLES;
ALTER TABLE `#sql1`      RENAME `@0023sql1`;
ALTER TABLE `@0023sql2`  RENAME `#sql2`;
SHOW TABLES;
INSERT INTO `#sql2`      VALUES (1);
INSERT INTO `@0023sql1`  VALUES (2);
SHOW CREATE TABLE `#sql2`;
SHOW CREATE TABLE `@0023sql1`;
DROP TABLE `#sql2`, `@0023sql1`;

#
# Bug #22369: Alter table rename combined with other alterations causes lost tables
#
# This problem happens if the data change is compatible.
# Changing to the same type is compatible for example.
#
--disable_warnings
DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;
--enable_warnings
CREATE TABLE t1 (
  int_field INTEGER UNSIGNED NOT NULL,
  char_field CHAR(10),
  INDEX(`int_field`)
);

DESCRIBE t1;

SHOW INDEXES FROM t1;

INSERT INTO t1 VALUES (1, "edno"), (1, "edno"), (2, "dve"), (3, "tri"), (5, "pet"); 
--echo "Non-copy data change - new frm, but old data and index files"
ALTER TABLE t1
  CHANGE int_field unsigned_int_field INTEGER UNSIGNED NOT NULL,
  RENAME t2;

--error ER_NO_SUCH_TABLE
SELECT * FROM t1 ORDER BY int_field;
SELECT * FROM t2 ORDER BY unsigned_int_field;
DESCRIBE t2;
DESCRIBE t2;
ALTER TABLE t2 MODIFY unsigned_int_field BIGINT UNSIGNED NOT NULL;
DESCRIBE t2;

DROP TABLE t2;