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mariadb/mysql-test/suite/innodb/r/innodb-index.result
Aleksey Midenkov a518e1dd42 MDEV-20865 Store foreign key info in TABLE_SHARE 
1. Access foreign keys via TABLE_SHARE::foreign_keys and
   TABLE_SHARE::referenced_keys;

   foreign_keys and referenced_keys are lists in TABLE_SHARE.

2. Remove handler FK interface:

   - get_foreign_key_list()
   - get_parent_foreign_key_list()
   - referenced_by_foreign_key()

3. Invalidate referenced shares on:

   - RENAME TABLE
   - DROP TABLE
   - RENAME COLUMN
   - ADD FOREIGN KEY

   When foreign table is created or altered by the above operations
   all referenced shares are closed. This blocks the operation while
   any referenced shares are used (when at least one its TABLE
   instance is locked).

4. Update referenced shares on:

   - CREATE TABLE

   On CREATE TABLE add items to referenced_keys of referenced
   shares. States of referenced shares are restored in case of errors.

5. Invalidate foreign shares on:

   - RENAME TABLE
   - RENAME COLUMN

   The above-mentioned blocking takes effect.

6. Check foreign/referenced shares consistency on:

   - CHECK TABLE

7. Temporary change until MDEV-21051:

   InnoDB fill foreign key info at handler open().

FOREIGN_KEY_INFO is refactored to FK_info holding Lex_cstring.

On first TABLE open FK_info is loaded from storage engine into
TABLE_SHARE. All referenced shares (if any exists) are closed. This
leads to blocking of first time foreign table open while referenced
tables are used.

MDEV-21311 Converge Foreign_key and supplemental generated Key together

mysql_prepare_create_table() does data validation and such utilities
as automatic name generation. But it does that only for indexes and
ignores Foreign_key objects. Now as Foreign_key data needs to be
stored in FRM files as well this processing must be done for it like
for any other Key objects.

Replace Key::FOREIGN_KEY type with Key::foreign flag of type
Key::MULTIPLE and Key::generated set to true. Construct one object
with Key::foreign == true instead of two objects of type
Key::FOREIGN_KEY and Key::MULTIPLE.

MDEV-21051 datadict refactorings

- Move read_extra2() to datadict.cc
- Refactored extra2_fields to Extra2_info
- build_frm_image() readability

MDEV-21051 build_table_shadow_filename() refactoring

mysql_prepare_alter_table() leaks fixes

MDEV-21051 amend system tables locking restriction

Table mysql.help_relation has foreign key to mysql.help_keyword. On
bootstrap when help_relation is opened, it preopens help_keyword for
READ and fails in lock_tables_check().

If system table is opened for write then fk references are opened for
write.

Related to: Bug#25422, WL#3984
Tests: main.lock

MDEV-21051 Store and read foreign key info into/from FRM files

1. Introduce Foreign_key_io class which creates/parses binary stream
containing foreign key structures. Referenced tables store there only
hints about foreign tables (their db and name), they restore full info
from the corresponding tables.

Foreign_key_io is stored under new EXTRA2_FOREIGN_KEY_INFO field in
extra2 section of FRM file.

2. Modify mysql_prepare_create_table() to generate names for foreign
keys. Until InnoDB storage of foreign keys is removed, FK names must
be unique across the database: the FK name must be based on table
name.

3. Keep stored data in sync on DDL changes. Referenced tables update
their foreign hints after following operations on foreign tables:

  - RENAME TABLE
  - DROP TABLE
  - CREATE TABLE
  - ADD FOREIGN KEY
  - DROP FOREIGN KEY

Foreign tables update their foreign info after following operations on
referenced tables:

  - RENAME TABLE
  - RENAME COLUMN

4. To achieve 3. there must be ability to rewrite extra2 section of
FRM file without full reparse. FRM binary is built from primary
structures like HA_CREATE_INFO and cannot be built from TABLE_SHARE.

Use shadow write and rename like fast_alter_partition_table()
does. Shadow FRM is new FRM file that replaces the old one.

CREATE TABLE workflow:

  1. Foreign_key is constructed in parser, placed into
     alter_info->key_list;

  2. mysql_prepare_create_table() translates them to FK_info, assigns
     foreign_id if needed;

  3. build_frm_image() writes two FK_info lists into FRM's extra2
     section, for referenced keys it stores only table names (hints);

  4. init_from_binary_frm_image() parses extra2 section and fills
     foreign_keys and referenced_keys of TABLE_SHARE.

     It restores referenced_keys by reading hint list of table names,
     opening corresponding shares and restoring FK_info from their
     foreign_keys. Hints resolution is done only when initializing
     non-temporary shares. Usually temporary share has different
     (temporary) name and it is impossible to resolve foreign keys by
     that name (as we identify them by both foreign and referenced
     table names). Another not unimportant reason is performance: this
     saves spare share acquisitions.

ALTER TABLE workflow:

  1. Foreign_key is constructed in parser, placed into
     alter_info->key_list;

  2. mysql_prepare_alter_table() prepares action lists and share list
     of foreigns/references;

  3. mysql_prepare_alter_table() locks list of foreigns/references by
     MDL_INTENTION_EXCLUSIVE, acquires shares;

  4. prepare_create_table() converts key_list into FK_list, assigns
     foreign_id;

  5. shadow FRM of altered table is created;

  6. data is copied;

  7. altered table is locked by MDL_EXCLUSIVE;

  8. fk_handle_alter() processes action lists, creates FK backups,
     modifies shares, writes shadow FRMs;

  9. altered table is closed;

  10. shadow FRMs are installed;

  11. altered table is renamed, FRM backup deleted;

  12. (TBD in MDEV-21053) shadow FRMs installation log closed, backups
      deleted;

On FK backup system:

In case of failed DDL operation all shares that was modified must be
restored into original state. This is done by FK_ddl_backup (CREATE,
DROP), FK_rename_backup (RENAME), FK_alter_backup (ALTER).

On STL usage:

STL is used for utility not performance-critical algorithms, core
structures hold native List. A wrapper was made to convert STL
exception into bool error status or NULL value.

MDEV-20865 fk_check_consistency() in CHECK TABLE

Self-refs fix

Test table_flags fix: "debug" deviation is now gone.

FIXMEs: +16 -1
2025-09-02 13:24:36 +03:00

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ALTER DATABASE test CHARACTER SET latin1 COLLATE latin1_swedish_ci;
SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS;
create table t1(a varchar(2) primary key) engine=innodb;
insert into t1 values('');
create index t1a1 on t1(a(1));
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
drop table t1;
create table t1(a int not null, b int, c char(10) not null, d varchar(20)) engine = innodb;
insert into t1 values (5,5,'oo','oo'),(4,4,'tr','tr'),(3,4,'ad','ad'),(2,3,'ak','ak');
commit;
alter table t1 add index b (b), add index b (b);
ERROR 42000: Duplicate key name 'b'
alter table t1 add index (b,b);
ERROR 42S21: Duplicate column name 'b'
alter table t1 add index d2 (d);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) NOT NULL,
`d` varchar(20) DEFAULT NULL,
KEY `d2` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
analyze table t1;
explain select * from t1 force index(d2) order by d;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL d2 23 NULL 4
select * from t1 force index (d2) order by d;
a b c d
3 4 ad ad
2 3 ak ak
5 5 oo oo
4 4 tr tr
alter table t1 add unique index (b);
ERROR 23000: Duplicate entry '4' for key 'b'
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) NOT NULL,
`d` varchar(20) DEFAULT NULL,
KEY `d2` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
alter table t1 add index (b);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) NOT NULL,
`d` varchar(20) DEFAULT NULL,
KEY `d2` (`d`),
KEY `b` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
alter table t1 add unique index (c), add index (d);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 1
Warnings:
Note 1831 Duplicate index `d`. This is deprecated and will be disallowed in a future release
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) NOT NULL,
`d` varchar(20) DEFAULT NULL,
UNIQUE KEY `c` (`c`),
KEY `d2` (`d`),
KEY `b` (`b`),
KEY `d` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
analyze table t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
explain select * from t1 force index(c) order by c;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL c 10 NULL 4
alter table t1 add primary key (a), drop index c;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) NOT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `d2` (`d`),
KEY `b` (`b`),
KEY `d` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
affected rows: 1
alter table t1 add primary key (c);
ERROR 42000: Multiple primary key defined
alter table t1 drop primary key, add primary key (b);
ERROR 23000: Duplicate entry '4' for key 'PRIMARY'
create unique index c on t1 (c);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) NOT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `c` (`c`),
KEY `d2` (`d`),
KEY `b` (`b`),
KEY `d` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
analyze table t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
explain select * from t1 force index(c) order by c;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL c 10 NULL 4
select * from t1 force index(c) order by c;
a b c d
3 4 ad ad
2 3 ak ak
5 5 oo oo
4 4 tr tr
alter table t1 drop index b, add index (b);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) NOT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `c` (`c`),
KEY `d2` (`d`),
KEY `b` (`b`),
KEY `d` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
insert into t1 values(6,1,'ggg','ggg');
select * from t1;
a b c d
2 3 ak ak
3 4 ad ad
4 4 tr tr
5 5 oo oo
6 1 ggg ggg
select * from t1 force index(b) order by b;
a b c d
6 1 ggg ggg
2 3 ak ak
3 4 ad ad
4 4 tr tr
5 5 oo oo
select * from t1 force index(c) order by c;
a b c d
3 4 ad ad
2 3 ak ak
6 1 ggg ggg
5 5 oo oo
4 4 tr tr
select * from t1 force index(d) order by d;
a b c d
3 4 ad ad
2 3 ak ak
6 1 ggg ggg
5 5 oo oo
4 4 tr tr
analyze table t1;
explain select * from t1 force index(b) order by b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 5 NULL 5
explain select * from t1 force index(c) order by c;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL c 10 NULL 5
explain select * from t1 force index(d) order by d;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL d 23 NULL 5
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) NOT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `c` (`c`),
KEY `d2` (`d`),
KEY `b` (`b`),
KEY `d` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
drop table t1;
create table t1(a int not null, b int, c char(10), d varchar(20), primary key (a)) engine = innodb;
insert into t1 values (1,1,'ab','ab'),(2,2,'ac','ac'),(3,3,'ad','ad'),(4,4,'afe','afe');
commit;
alter table t1 add index (c(2));
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) DEFAULT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `c` (`c`(2))
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
affected rows: 1
alter table t1 add unique index (d(10));
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) DEFAULT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `d` (`d`(10)),
KEY `c` (`c`(2))
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
affected rows: 1
insert into t1 values(5,1,'ggg','ggg');
analyze table t1;
select * from t1;
a b c d
1 1 ab ab
2 2 ac ac
3 3 ad ad
4 4 afe afe
5 1 ggg ggg
select * from t1 force index(c) order by c;
a b c d
1 1 ab ab
2 2 ac ac
3 3 ad ad
4 4 afe afe
5 1 ggg ggg
select * from t1 force index(d) order by d;
a b c d
1 1 ab ab
2 2 ac ac
3 3 ad ad
4 4 afe afe
5 1 ggg ggg
explain select * from t1 order by b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using filesort
explain select * from t1 force index(c) order by c;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using filesort
explain select * from t1 force index(d) order by d;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using filesort
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) DEFAULT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `d` (`d`(10)),
KEY `c` (`c`(2))
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
alter table t1 drop index d;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
insert into t1 values(8,9,'fff','fff');
select * from t1;
a b c d
1 1 ab ab
2 2 ac ac
3 3 ad ad
4 4 afe afe
5 1 ggg ggg
8 9 fff fff
select * from t1 force index(c) order by c;
a b c d
1 1 ab ab
2 2 ac ac
3 3 ad ad
4 4 afe afe
8 9 fff fff
5 1 ggg ggg
analyze table t1;
explain select * from t1 order by b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using filesort
explain select * from t1 force index(c) order by c;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using filesort
explain select * from t1 order by d;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using filesort
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) DEFAULT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `c` (`c`(2))
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
drop table t1;
create table t1(a int not null, b int, c char(10), d varchar(20), primary key (a)) engine = innodb;
insert into t1 values (1,1,'ab','ab'),(2,2,'ac','ac'),(3,2,'ad','ad'),(4,4,'afe','afe');
commit;
alter table t1 add unique index (b,c);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
insert into t1 values(8,9,'fff','fff');
select * from t1;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
select * from t1 force index(b) order by b;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
analyze table t1;
explain select * from t1 force index(b) order by b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 16 NULL 5
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) DEFAULT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `b` (`b`,`c`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
alter table t1 add index (b,c);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
insert into t1 values(11,11,'kkk','kkk');
select * from t1;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
11 11 kkk kkk
select * from t1 force index(b) order by b;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
11 11 kkk kkk
analyze table t1;
explain select * from t1 force index(b) order by b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 16 NULL 6
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) DEFAULT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `b` (`b`,`c`),
KEY `b_2` (`b`,`c`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
alter table t1 add unique index (c,d);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
insert into t1 values(13,13,'yyy','aaa');
select * from t1;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
11 11 kkk kkk
13 13 yyy aaa
select * from t1 force index(b) order by b;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
11 11 kkk kkk
13 13 yyy aaa
select * from t1 force index(c) order by c;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
11 11 kkk kkk
13 13 yyy aaa
analyze table t1;
explain select * from t1 force index(b) order by b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 16 NULL 7
explain select * from t1 force index(c) order by c;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL c 34 NULL 7
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) DEFAULT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `b` (`b`,`c`),
UNIQUE KEY `c` (`c`,`d`),
KEY `b_2` (`b`,`c`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
drop table t1;
create table t1(a int not null, b int not null, c int, primary key (a), key (b)) engine = innodb;
create table t3(a int not null, c int not null, d int, primary key (a), key (c)) engine = innodb;
create table t4(a int not null, d int not null, e int, primary key (a), key (d)) engine = innodb;
create table t2(a int not null, b int, c int, d int, e int,
foreign key (b) references t1(b) on delete set null,
foreign key (c) references t3(c), foreign key (d) references t4(d) on update set null)
engine = innodb;
alter table t1 drop index b;
ERROR HY000: Missing index for constraint 't2.1' in the referenced table 't1'
alter table t3 drop index c;
ERROR HY000: Missing index for constraint 't2.2' in the referenced table 't3'
alter table t4 drop index d;
ERROR HY000: Missing index for constraint 't2.3' in the referenced table 't4'
alter table t2 drop index b;
ERROR HY000: Missing index for constraint '1' in the foreign table 't2'
alter table t2 drop index b, drop index c, drop index d;
ERROR HY000: Missing index for constraint '1' in the foreign table 't2'
alter table t2 MODIFY b INT NOT NULL, ALGORITHM=COPY;
ERROR HY000: Column 'b' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
set @old_sql_mode = @@sql_mode;
set @@sql_mode = 'STRICT_TRANS_TABLES';
alter table t2 MODIFY b INT NOT NULL, ALGORITHM=INPLACE;
ERROR HY000: Column 'b' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
set @@sql_mode = @old_sql_mode;
SET FOREIGN_KEY_CHECKS=0;
alter table t2 DROP COLUMN b, ALGORITHM=COPY;
ERROR 42000: Incorrect foreign key definition for 'b': foreign field not found
alter table t2 DROP COLUMN b;
ERROR 42000: Incorrect foreign key definition for 'b': foreign field not found
alter table t1 DROP COLUMN b, ALGORITHM=COPY;
ERROR HY000: Cannot drop column 'b': needed in a foreign key constraint '1' of table `test`.`t2`
alter table t1 DROP COLUMN b;
ERROR HY000: Cannot drop column 'b': needed in a foreign key constraint 'test/t2' of table `test`.`t2`
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
create unique index dc on t2 (d,c);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
create index dc on t1 (b,c);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
set @@sql_mode = 'STRICT_TRANS_TABLES';
alter table t2 add primary key (alpha), change a alpha int,
change b beta int not null, change c charlie int not null;
ERROR HY000: Column 'beta' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
alter table t2 add primary key (alpha), change a alpha int,
change c charlie int not null, change d delta int not null;
ERROR HY000: Column 'delta' cannot be NOT NULL: needed in a foreign key constraint '3' SET NULL
alter table t2 add primary key (alpha), change a alpha int,
change b beta int, modify c int not null;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
set @@sql_mode = @old_sql_mode;
insert into t1 values (1,1,1);
insert into t3 values (1,1,1);
insert into t4 values (1,1,1);
insert into t2 values (1,1,1,1,1);
commit;
alter table t4 add constraint dc foreign key (a) references t1(a);
affected rows: 1
info: Records: 1 Duplicates: 0 Warnings: 0
show create table t4;
Table Create Table
t4 CREATE TABLE `t4` (
`a` int(11) NOT NULL,
`d` int(11) NOT NULL,
`e` int(11) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `d` (`d`),
CONSTRAINT `dc` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
alter table t3 add constraint dc foreign key (a) references t1(a);
alter table t3 drop foreign key dc;
alter table t3 add constraint dc foreign key (a) references t1(a);
show create table t3;
Table Create Table
t3 CREATE TABLE `t3` (
`a` int(11) NOT NULL,
`c` int(11) NOT NULL,
`d` int(11) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `c` (`c`),
CONSTRAINT `dc` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
alter table t2 drop index b, add index (beta);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`alpha` int(11) NOT NULL,
`beta` int(11) DEFAULT NULL,
`c` int(11) NOT NULL,
`d` int(11) DEFAULT NULL,
`e` int(11) DEFAULT NULL,
PRIMARY KEY (`alpha`),
UNIQUE KEY `dc` (`d`,`c`),
KEY `c` (`c`),
KEY `beta` (`beta`),
CONSTRAINT `1` FOREIGN KEY (`beta`) REFERENCES `t1` (`b`) ON DELETE SET NULL,
CONSTRAINT `2` FOREIGN KEY (`c`) REFERENCES `t3` (`c`),
CONSTRAINT `3` FOREIGN KEY (`d`) REFERENCES `t4` (`d`) ON UPDATE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
delete from t1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t3`, CONSTRAINT `dc` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
drop index dc on t4;
ERROR 42000: Can't DROP INDEX `dc`; check that it exists
alter table t3 drop foreign key dc;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
alter table t4 drop foreign key dc;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
select * from t2;
alpha beta c d e
1 1 1 1 1
delete from t1;
select * from t2;
alpha beta c d e
1 NULL 1 1 1
drop table t2,t4,t3,t1;
create table t1(a int not null, b int, c char(10), d varchar(20), primary key (a)) engine = innodb default charset=utf8;
insert into t1 values (1,1,'ab','ab'),(2,2,'ac','ac'),(3,2,'ad','ad'),(4,4,'afe','afe');
commit;
alter table t1 add unique index (b);
ERROR 23000: Duplicate entry '2' for key 'b'
insert into t1 values(8,9,'fff','fff');
select * from t1;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) DEFAULT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_uca1400_ai_ci
alter table t1 add index (b);
insert into t1 values(10,10,'kkk','iii');
select * from t1;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
10 10 kkk iii
select * from t1 force index(b) order by b;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
10 10 kkk iii
explain select * from t1 force index(b) order by b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 5 NULL 6
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) DEFAULT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `b` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_uca1400_ai_ci
alter table t1 add unique index (c), add index (d);
insert into t1 values(11,11,'aaa','mmm');
select * from t1;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
10 10 kkk iii
11 11 aaa mmm
select * from t1 force index(b) order by b;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
10 10 kkk iii
11 11 aaa mmm
select * from t1 force index(c) order by c;
a b c d
11 11 aaa mmm
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
10 10 kkk iii
select * from t1 force index(d) order by d;
a b c d
1 1 ab ab
2 2 ac ac
3 2 ad ad
4 4 afe afe
8 9 fff fff
10 10 kkk iii
11 11 aaa mmm
explain select * from t1 force index(b) order by b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 5 NULL 7
explain select * from t1 force index(c) order by c;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL c 31 NULL 7
explain select * from t1 force index(d) order by d;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL d 63 NULL 7
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) DEFAULT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `c` (`c`),
KEY `b` (`b`),
KEY `d` (`d`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_uca1400_ai_ci
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
drop table t1;
create table t1(a int not null, b int) engine = innodb;
insert into t1 values (1,1),(1,1),(1,1),(1,1);
alter table t1 add unique index (a);
ERROR 23000: Duplicate entry '1' for key 'a'
alter table t1 add unique index (b);
ERROR 23000: Duplicate entry '1' for key 'b'
alter table t1 add unique index (a), add unique index(b);
ERROR 23000: Duplicate entry '1' for key 'a'
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
drop table t1;
create table t1(a int not null, c int not null,b int, primary key(a), unique key(c), key(b)) engine = innodb;
alter table t1 drop index c, drop index b;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`c` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
drop table t1;
create table t1(a int not null, b int, primary key(a)) engine = innodb;
alter table t1 add index (b);
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `b` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
drop table t1;
create table t1(a int not null, b int, c char(10), d varchar(20), primary key (a)) engine = innodb;
insert into t1 values (1,1,'ab','ab'),(2,2,'ac','ac'),(3,3,'ac','ac'),(4,4,'afe','afe'),(5,4,'affe','affe');
alter table t1 add unique index (b), add unique index (c), add unique index (d);
ERROR 23000: Duplicate entry '4' for key 'b'
alter table t1 add unique index (c), add unique index (b), add index (d);
ERROR 23000: Duplicate entry 'ac' for key 'c'
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) DEFAULT NULL,
`c` char(10) DEFAULT NULL,
`d` varchar(20) DEFAULT NULL,
PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
drop table t1;
create table t1(a int not null, b int not null, c int, primary key (a), key(c)) engine=innodb;
insert into t1 values (5,1,5),(4,2,4),(3,3,3),(2,4,2),(1,5,1);
alter table t1 add unique index (b);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
insert into t1 values (10,20,20),(11,19,19),(12,18,18),(13,17,17);
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) NOT NULL,
`c` int(11) DEFAULT NULL,
PRIMARY KEY (`a`),
UNIQUE KEY `b` (`b`),
KEY `c` (`c`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
analyze table t1;
explain select * from t1 force index(c) order by c;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL c 5 NULL 9
explain select * from t1 order by a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 9
explain select * from t1 force index(b) order by b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL b 4 NULL 9
select * from t1 order by a;
a b c
1 5 1
2 4 2
3 3 3
4 2 4
5 1 5
10 20 20
11 19 19
12 18 18
13 17 17
select * from t1 force index(b) order by b;
a b c
5 1 5
4 2 4
3 3 3
2 4 2
1 5 1
13 17 17
12 18 18
11 19 19
10 20 20
select * from t1 force index(c) order by c;
a b c
1 5 1
2 4 2
3 3 3
4 2 4
5 1 5
13 17 17
12 18 18
11 19 19
10 20 20
drop table t1;
create table t1(a int not null, b int not null) engine=innodb;
insert into t1 values (1,1);
alter table t1 add primary key(b);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
insert into t1 values (2,2);
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) NOT NULL,
PRIMARY KEY (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
select * from t1;
a b
1 1
2 2
analyze table t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
explain select * from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
explain select * from t1 order by a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using filesort
explain select * from t1 order by b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 2
checksum table t1;
Table Checksum
test.t1 582702641
drop table t1;
create table t1(a int not null) engine=innodb;
insert into t1 values (1);
alter table t1 add primary key(a);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
insert into t1 values (2);
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
PRIMARY KEY (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
check table t1;
Table Op Msg_type Msg_text
test.t1 check status OK
commit;
select * from t1;
a
1
2
analyze table t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
explain select * from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
explain select * from t1 order by a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 2
drop table t1;
SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET FOREIGN_KEY_CHECKS=0;
CREATE TABLE t1(
c1 BIGINT(12) NOT NULL,
PRIMARY KEY (c1)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE t2(
c1 BIGINT(16) NOT NULL,
c2 BIGINT(12) NOT NULL,
c3 BIGINT(12) NOT NULL,
PRIMARY KEY (c1)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3) REFERENCES t1(c1);
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`c1` bigint(16) NOT NULL,
`c2` bigint(12) NOT NULL,
`c3` bigint(12) NOT NULL,
PRIMARY KEY (`c1`),
KEY `fk_t2_ca` (`c3`),
CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
CREATE INDEX i_t2_c3_c2 ON t2(c3, c2);
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`c1` bigint(16) NOT NULL,
`c2` bigint(12) NOT NULL,
`c3` bigint(12) NOT NULL,
PRIMARY KEY (`c1`),
KEY `i_t2_c3_c2` (`c3`,`c2`),
CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;
INSERT INTO t2 VALUES(0,0,0);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`))
INSERT INTO t1 VALUES(0);
INSERT INTO t2 VALUES(0,0,0);
DROP TABLE t2;
CREATE TABLE t2(
c1 BIGINT(16) NOT NULL,
c2 BIGINT(12) NOT NULL,
c3 BIGINT(12) NOT NULL,
PRIMARY KEY (c1,c2,c3)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
SET FOREIGN_KEY_CHECKS=0;
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3) REFERENCES t1(c1);
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`c1` bigint(16) NOT NULL,
`c2` bigint(12) NOT NULL,
`c3` bigint(12) NOT NULL,
PRIMARY KEY (`c1`,`c2`,`c3`),
KEY `fk_t2_ca` (`c3`),
CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
CREATE INDEX i_t2_c3_c2 ON t2(c3, c2);
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`c1` bigint(16) NOT NULL,
`c2` bigint(12) NOT NULL,
`c3` bigint(12) NOT NULL,
PRIMARY KEY (`c1`,`c2`,`c3`),
KEY `i_t2_c3_c2` (`c3`,`c2`),
CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
INSERT INTO t2 VALUES(0,0,1);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`))
INSERT INTO t2 VALUES(0,0,0);
DELETE FROM t1;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`) REFERENCES `t1` (`c1`))
DELETE FROM t2;
DROP TABLE t2;
DROP TABLE t1;
CREATE TABLE t1(
c1 BIGINT(12) NOT NULL,
c2 INT(4) NOT NULL,
PRIMARY KEY (c2,c1)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE t2(
c1 BIGINT(16) NOT NULL,
c2 BIGINT(12) NOT NULL,
c3 BIGINT(12) NOT NULL,
PRIMARY KEY (c1)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
SET FOREIGN_KEY_CHECKS=0;
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c1,c1), ALGORITHM=COPY;
ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint is incorrectly formed")
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c1,c1);
ERROR HY000: Missing index for constraint 't2.fk_t2_ca' in the referenced table 't1'
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c1,c2), ALGORITHM=COPY;
ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint is incorrectly formed")
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c1,c2);
ERROR HY000: Missing index for constraint 't2.fk_t2_ca' in the referenced table 't1'
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c2,c1), ALGORITHM=INPLACE;
ERROR HY000: Failed to add the foreign key constraint on table 't2'. Incorrect options in FOREIGN KEY constraint 'fk_t2_ca'
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c2,c1), ALGORITHM=COPY;
ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint is incorrectly formed")
ALTER TABLE t1 MODIFY COLUMN c2 BIGINT(12) NOT NULL;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c1,c2), ALGORITHM=COPY;
ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint is incorrectly formed")
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c1,c2);
ERROR HY000: Missing index for constraint 't2.fk_t2_ca' in the referenced table 't1'
ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
FOREIGN KEY (c3,c2) REFERENCES t1(c2,c1);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
affected rows: 0
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`c1` bigint(12) NOT NULL,
`c2` bigint(12) NOT NULL,
PRIMARY KEY (`c2`,`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
affected rows: 1
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`c1` bigint(16) NOT NULL,
`c2` bigint(12) NOT NULL,
`c3` bigint(12) NOT NULL,
PRIMARY KEY (`c1`),
KEY `fk_t2_ca` (`c3`,`c2`),
CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`, `c2`) REFERENCES `t1` (`c2`, `c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
affected rows: 1
CREATE INDEX i_t2_c2_c1 ON t2(c2, c1);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`c1` bigint(16) NOT NULL,
`c2` bigint(12) NOT NULL,
`c3` bigint(12) NOT NULL,
PRIMARY KEY (`c1`),
KEY `fk_t2_ca` (`c3`,`c2`),
KEY `i_t2_c2_c1` (`c2`,`c1`),
CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`, `c2`) REFERENCES `t1` (`c2`, `c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
affected rows: 1
CREATE INDEX i_t2_c3_c1_c2 ON t2(c3, c1, c2);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`c1` bigint(16) NOT NULL,
`c2` bigint(12) NOT NULL,
`c3` bigint(12) NOT NULL,
PRIMARY KEY (`c1`),
KEY `fk_t2_ca` (`c3`,`c2`),
KEY `i_t2_c2_c1` (`c2`,`c1`),
KEY `i_t2_c3_c1_c2` (`c3`,`c1`,`c2`),
CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`, `c2`) REFERENCES `t1` (`c2`, `c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
affected rows: 1
CREATE INDEX i_t2_c3_c2 ON t2(c3, c2);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`c1` bigint(16) NOT NULL,
`c2` bigint(12) NOT NULL,
`c3` bigint(12) NOT NULL,
PRIMARY KEY (`c1`),
KEY `i_t2_c2_c1` (`c2`,`c1`),
KEY `i_t2_c3_c1_c2` (`c3`,`c1`,`c2`),
KEY `i_t2_c3_c2` (`c3`,`c2`),
CONSTRAINT `fk_t2_ca` FOREIGN KEY (`c3`, `c2`) REFERENCES `t1` (`c2`, `c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
affected rows: 1
DROP TABLE t2;
DROP TABLE t1;
connect a,localhost,root,,;
connect b,localhost,root,,;
connection a;
CREATE TABLE t1 (a INT, b CHAR(1)) ENGINE=InnoDB;
INSERT INTO t1 VALUES (3,'a'),(3,'b'),(1,'c'),(0,'d'),(1,'e');
CREATE TABLE t2 (a INT, b CHAR(1)) ENGINE=InnoDB;
CREATE TABLE t2i (a INT, b CHAR(1) NOT NULL) ENGINE=InnoDB;
CREATE TABLE t2c (a INT, b CHAR(1) NOT NULL) ENGINE=InnoDB;
INSERT INTO t2 SELECT * FROM t1;
INSERT INTO t2i SELECT * FROM t1;
INSERT INTO t2c SELECT * FROM t1;
connection b;
BEGIN;
SELECT * FROM t1;
a b
3 a
3 b
1 c
0 d
1 e
connection a;
SET lock_wait_timeout=1;
CREATE INDEX t1a ON t1(a);
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
CREATE INDEX t2a ON t2(a);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
set @old_sql_mode = @@sql_mode;
set @@sql_mode = 'STRICT_TRANS_TABLES';
ALTER TABLE t2i ADD PRIMARY KEY(a,b), ADD INDEX t2a(a), ALGORITHM=INPLACE;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
set @@sql_mode = @old_sql_mode;
ALTER TABLE t2c ADD PRIMARY KEY(a,b), ADD INDEX t2a(a), ALGORITHM=COPY;
affected rows: 5
info: Records: 5 Duplicates: 0 Warnings: 0
connection b;
SELECT * FROM t2i;
ERROR HY000: Table definition has changed, please retry transaction
SELECT * FROM t2i FORCE INDEX(t2a) ORDER BY a;
ERROR HY000: Table definition has changed, please retry transaction
SELECT * FROM t2c;
ERROR HY000: Table definition has changed, please retry transaction
SELECT * FROM t2c FORCE INDEX(t2a) ORDER BY a;
ERROR HY000: Table definition has changed, please retry transaction
SELECT * FROM t2;
a b
3 a
3 b
1 c
0 d
1 e
SELECT * FROM t2 FORCE INDEX(t2a) ORDER BY a;
ERROR HY000: Table definition has changed, please retry transaction
SELECT * FROM t2;
a b
3 a
3 b
1 c
0 d
1 e
COMMIT;
SELECT * FROM t2;
a b
3 a
3 b
1 c
0 d
1 e
SELECT * FROM t2 FORCE INDEX(t2a) ORDER BY a;
a b
0 d
1 c
1 e
3 a
3 b
SELECT * FROM t2i;
a b
0 d
1 c
1 e
3 a
3 b
SELECT * FROM t2i FORCE INDEX(t2a) ORDER BY a;
a b
0 d
1 c
1 e
3 a
3 b
SELECT * FROM t2c;
a b
0 d
1 c
1 e
3 a
3 b
SELECT * FROM t2c FORCE INDEX(t2a) ORDER BY a;
a b
0 d
1 c
1 e
3 a
3 b
connection default;
disconnect a;
disconnect b;
alter table t2 add index t2a(b);
ERROR 42000: Duplicate key name 't2a'
alter table t2 drop index t2a, add index t2a(b);
show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` int(11) DEFAULT NULL,
`b` char(1) DEFAULT NULL,
KEY `t2a` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
show create table t2i;
Table Create Table
t2i CREATE TABLE `t2i` (
`a` int(11) NOT NULL,
`b` char(1) NOT NULL,
PRIMARY KEY (`a`,`b`),
KEY `t2a` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
show create table t2c;
Table Create Table
t2c CREATE TABLE `t2c` (
`a` int(11) NOT NULL,
`b` char(1) NOT NULL,
PRIMARY KEY (`a`,`b`),
KEY `t2a` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
DROP TABLE t1,t2,t2c,t2i;
CREATE TABLE t1 (c VARCHAR(1024),
c1 CHAR(255) NOT NULL,c2 CHAR(255) NOT NULL,c3 CHAR(255) NOT NULL,
c4 CHAR(255) NOT NULL,c5 CHAR(255) NOT NULL,c6 CHAR(255) NOT NULL,
c7 CHAR(255) NOT NULL,c8 CHAR(255) NOT NULL,c9 CHAR(255) NOT NULL,
ca CHAR(255) NOT NULL,cb CHAR(255) NOT NULL,cc CHAR(255) NOT NULL,
cd CHAR(255) NOT NULL,ce CHAR(255) NOT NULL,cf CHAR(255) NOT NULL,
d0 CHAR(255) NOT NULL,d1 CHAR(255) NOT NULL,d2 CHAR(255) NOT NULL,
d3 CHAR(255) NOT NULL,d4 CHAR(255) NOT NULL,d5 CHAR(255) NOT NULL,
d6 CHAR(255) NOT NULL,d7 CHAR(255) NOT NULL,d8 CHAR(255) NOT NULL,
d9 CHAR(255) NOT NULL,da CHAR(255) NOT NULL,db CHAR(255) NOT NULL,
dc CHAR(255) NOT NULL,dd CHAR(255) NOT NULL,de CHAR(255) NOT NULL,
UNIQUE KEY(c))
ENGINE=InnoDB ROW_FORMAT=DYNAMIC;
INSERT INTO t1 VALUES
(repeat('a',999),'','','','','','','','','','','','','','','','','','','','','','','','','','','','','',''),
(CONCAT(repeat('a',999),'b'),'','','','','','','','','','','','','','','','','','','','','','','','','','','','','','');
ALTER TABLE t1 ROW_FORMAT=REDUNDANT, algorithm=inplace;
ERROR HY000: Index column size too large. The maximum column size is 767 bytes
ALTER TABLE t1 ROW_FORMAT=REDUNDANT, algorithm=copy;
ERROR HY000: Index column size too large. The maximum column size is 767 bytes
SELECT COUNT(*) FROM t1;
COUNT(*)
2
CHECK TABLE t1;
Table Op Msg_type Msg_text
test.t1 check status OK
DROP TABLE t1;
#
# Bug#19811005 ALTER TABLE ADD INDEX DOES NOT UPDATE INDEX_LENGTH
# IN I_S TABLES
#
CREATE TABLE t1(a INT, b INT) ENGINE=INNODB, STATS_PERSISTENT=1;
SELECT cast(DATA_LENGTH/@@innodb_page_size as int) D,
cast(INDEX_LENGTH/@@innodb_page_size as int) I
FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='test';
D I
1 0
ALTER TABLE t1 ADD INDEX (a);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT cast(DATA_LENGTH/@@innodb_page_size as int) D,
cast(INDEX_LENGTH/@@innodb_page_size as int) I
FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='test';
D I
1 1
ALTER TABLE t1 ADD INDEX (b);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT cast(DATA_LENGTH/@@innodb_page_size as int) D,
cast(INDEX_LENGTH/@@innodb_page_size as int) I
FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='test';
D I
1 2
DROP TABLE t1;
#
# Bug #17657223 EXCESSIVE TEMPORARY FILE USAGE IN ALTER TABLE
#
SET GLOBAL innodb_monitor_enable = module_ddl;
create table t1(f1 int not null, f2 blob)engine=innodb;
insert into t1 values(1, repeat('a',20000));
# Skip sort
# Reusing the same pk
alter table t1 force;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
drop table t1;
create table t1(f1 int not null, f2 int not null,
primary key(f1))engine=innodb;
insert into t1 values(1,2), (3,4);
# Add Secondary index.
# Skip temp file usage due to small table size
alter table t1 add key(f2);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
drop table t1;
create table t480(a serial)engine=innodb;
insert into t480
values(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),(),
(),(),(),(),(),(),(),();
insert into t480 select 0 from t480;
insert into t480 select 0 from t480;
insert into t480 select 0 from t480;
insert into t480 select 0 from t480;
create table t1(f1 int auto_increment not null,
f2 char(200) not null, f3 char(200) not null,
f4 char(200) not null,primary key(f1))engine=innodb;
insert into t1 select NULL,'aaa','bbb','ccc' from t480;
insert into t1 select NULL,'aaaa','bbbb','cccc' from t480;
insert into t1 select NULL,'aaaaa','bbbbb','ccccc' from t480;
insert into t1 select NULL,'aaaaaa','bbbbbb','cccccc' from t480;
insert into t1 select NULL,'aaaaaaa','bbbbbbb','ccccccc' from t480;
insert into t1 select NULL,'aaaaaaaa','bbbbbbbb','cccccccc' from t480;
select count(*) from t1;
count(*)
2880
# Skip sort
# Change PK from (f1) to (f1,f2,f3,f4)
alter table t1 drop primary key, add primary key(f1,f2,f3,f4);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Change PK from (f1,f2,f3,f4) to (f1,f2,added_columns)
alter table t1 drop primary key,add column f5 int not null,
add column f6 int not null,add primary key(f1,f2,f5,f6);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Change PK from (f1,f2,f5,f6) to (f1,f2,f5)
alter table t1 drop column f6;
ERROR 42000: Key column 'f6' doesn't exist in table
alter table t1 drop column f6, drop primary key, add primary key(f1,f2,f5);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Reusing the same PK
alter table t1 add column f6 int;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Reusing the same pk
alter table t1 drop column f6;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Must sort
# Change PK from (f1,f2,f5) to (f1,f5)
alter table t1 drop column f2;
ERROR 42000: Key column 'f2' doesn't exist in table
alter table t1 drop column f2, drop primary key, add primary key(f1,f5);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
ddl_sort_file_alter_table 2
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Reusing the same pk
alter table t1 add column f2n int after f1, drop primary key, add
primary key (f1,f5,f2n);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Reusing the same pk
alter table t1 change f5 f2n int not null,change f2n f5 int not null,
add column f8 int not null;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Change PK from (f1,f4,f2n) to (f1,f4,added_column,f2n)
alter table t1 add column f7 int, drop primary key,
add primary key (f1,f5,f7,f2n);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
ddl_sort_file_alter_table 2
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Reusing the same pk
alter table t1 force;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Reusing the same pk
alter table t1 row_format=compact;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Reusing the same pk
alter table t1 engine=innodb;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Optimize table
optimize table t1;
Table Op Msg_type Msg_text
test.t1 optimize note Table does not support optimize, doing recreate + analyze instead
test.t1 optimize status OK
affected rows: 2
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Sort files used for adding secondary index
alter table t1 drop primary key, add primary key(f1,f5,f7), add index
i(f3);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# No sort files used for dropping secondary index
alter table t1 drop primary key, add primary key(f1,f5),drop index i;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Change PK(f1,f5) to (f1,added_columns) and drop f5
alter table t1 drop primary key, add primary key(f1,f12),
drop column f5, add column f12 int not null;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Must sort
# Change PK(f1,f12) to (f1,existing_columns)
alter table t1 drop primary key, add primary key(f1,f3);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
ddl_sort_file_alter_table 2
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort
# Change PK(f1,f3) to (f1,added_column,f3,added_column)
alter table t1 drop primary key, add column f3n int,
add column f4n int, add primary key(f1,f3n,f3,f4n);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Adding Secondary index alone.
alter table t1 add key(f1);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Must sort
# Change PK(f1,f3) to (existing_column,f1)
alter table t1 drop primary key, add primary key(f4,f1);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
ddl_sort_file_alter_table 3
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort for PK.
# Change PK(f4,f1) to (added_columns,f4,f1)
# Secondary index rebuild happens
alter table t1 drop primary key, add column f5n int,
add column f6n int, add primary key(f5n,f6n,f4,f1);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
# Skip sort for PK.
# Change PK(f5n,f6n,f4,f1) to
# (added_columns,f5n,added_column,f6n,f4,f1)
# Secondary index rebuild happens
alter table t1 drop primary key, add column f7n int,
add column f8n int, add primary key(f7n,f5n,f8n,f6n,f4,f1);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SELECT name, count_reset FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE
subsystem = 'ddl' and count_reset > 0;
name count_reset
SET GLOBAL innodb_monitor_reset = module_ddl;
SET GLOBAL innodb_monitor_disable = module_ddl;
select count(*) from t1;
count(*)
2880
drop table t1;
SET GLOBAL innodb_monitor_reset = default;
SET GLOBAL innodb_monitor_enable = default;
SET GLOBAL innodb_monitor_disable = default;
# Bug#19163915 INNODB: DUPLICATE RECORDS COULD EXIST
# WHEN SKIPPING SORT FOR CLUSTER INDEX
SELECT @@innodb_sort_buffer_size;
@@innodb_sort_buffer_size
1048576
create table t1(f1 int auto_increment not null,
f2 char(200) not null, f3 char(200) not null,
f4 char(200) not null,primary key(f1,f2,f3,f4));
insert into t1 select NULL,'aaa','bbb','ccc' from t480;
insert into t1 values(106, 'aaa','bbb','cccc');
select count(*) from t1;
count(*)
481
# Skip sort
# Change PK from (f1,f2,f3,f4) to (f1,f2,f3)
alter table t1 drop primary key, add primary key(f1,f2,f3);
ERROR 23000: ALTER TABLE causes auto_increment resequencing, resulting in duplicate entry '106-aaa-bbb' for key 'PRIMARY'
select count(*) from t1;
count(*)
481
drop table t1;
create table t1(f1 int auto_increment not null,
f2 char(200) not null, f3 char(200) not null,
f4 char(200) not null,primary key(f1,f2,f3,f4));
insert into t1 select NULL,'aaa','bbb','ccc' from t480;
insert into t1 values(108,'aaa','bbb','cccc');
select count(*) from t1;
count(*)
481
alter table t1 drop primary key, add primary key(f1,f2,f3);
ERROR 23000: ALTER TABLE causes auto_increment resequencing, resulting in duplicate entry '108-aaa-bbb' for key 'PRIMARY'
select count(*) from t1;
count(*)
481
drop table t1, t480;
#
# Bug #19896922 SORTING SKIPPED WHEN PREFIX LENGTH OF THE PK
# FIELD IS CHANGED
#
create table t1(a int not null, b varchar(30) not null,
primary key (b(10), a)) engine = innodb;
insert into t1 values(0,'khdHps6UxW8Lwaoxa604oK6zkb'),(1,'khdHps6UxW8L');
select * from t1;
a b
0 khdHps6UxW8Lwaoxa604oK6zkb
1 khdHps6UxW8L
alter table t1 drop primary key, add primary key (b(18),a);
select * from t1;
a b
1 khdHps6UxW8L
0 khdHps6UxW8Lwaoxa604oK6zkb
drop table t1;
create table t1(a int not null, b varchar(30) not null,
primary key (b(10), a)) engine = innodb;
insert into t1 values(0,'khdHps6UxW8Lwaoxa604oK6zkb'),(1,'khdHps6UtW8L');
select * from t1;
a b
1 khdHps6UtW8L
0 khdHps6UxW8Lwaoxa604oK6zkb
alter table t1 drop primary key, add primary key (b(8),a);
select * from t1;
a b
0 khdHps6UxW8Lwaoxa604oK6zkb
1 khdHps6UtW8L
drop table t1;
#
# Bug #21103101 SORTING SKIPPED WHEN DROPPING THE SINGLE
# COLUMN PRIMARY KEY
#
create table t1(f1 int not null, f2 int not null,
primary key (f1), unique key(f1, f2))engine=innodb;
insert into t1 values(1,3), (2,2);
alter table t1 drop column f1;
ERROR 42000: Key column 'f1' doesn't exist in table
alter table t1 drop column f1, drop primary key;
ERROR 42000: Key column 'f1' doesn't exist in table
alter table t1 drop column f1, drop key f1;
drop table t1;
create table t1(f1 int not null, f2 int not null,
primary key (f1), unique key(f1, f2))engine=innodb;
insert into t1 values(1,3), (2,2);
alter table t1 drop primary key, lock=none;
alter table t1 drop index f1, algorithm=inplace, lock=none;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: Dropping a primary key is not allowed without also adding a new primary key. Try ALGORITHM=COPY
drop table t1;
#
# BUG#21612714 ALTER TABLE SORTING SKIPPED WHEN CHANGE PK AND DROP
# LAST COLUMN OF OLD PK
#
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) engine = innodb;
insert into t1 values(1,1,2),(1,2,1);
alter table t1 drop primary key, add primary key(o1,o3), drop o2, lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) engine = innodb;
insert into t1 values(1,1,2),(1,2,1);
alter table t1 drop o1, drop o2, add primary key(o3), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) engine = innodb;
insert into t1 values(1,1,2),(1,2,1);
alter table t1 drop primary key, add primary key(o1,o3), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) engine = innodb;
insert into t1 values(1,1,2),(1,2,1);
alter table t1 drop primary key, add primary key(o3), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) engine = innodb;
insert into t1 values(1,1,2),(1,2,1);
alter table t1 add column n1 int not null, drop primary key, add primary key(n1,o3), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) engine = innodb;
insert into t1 values(1,1,2),(2,2,1);
alter table t1 add column n1 int not null, drop primary key, add primary key(o3,n1), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) engine = innodb;
insert into t1 values(1,2,2),(2,1,1);
alter table t1 drop primary key, add primary key(o2, o1), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) engine = innodb;
insert into t1 values(1,2,2),(2,1,1);
alter table t1 drop primary key, add primary key(o2), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) engine = innodb;
insert into t1 values(1,2,2),(2,1,1);
alter table t1 drop primary key, add primary key(o2,o3), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int not null, primary key(o2,o1)) engine = innodb;
insert into t1 values(1,1,2),(2,1,1);
alter table t1 drop primary key, add primary key(o2,o3), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) engine = innodb;
insert into t1 values(1,1,2),(1,2,1);
alter table t1 drop primary key, add primary key(o1,o3,o2), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int not null, primary key(o1,o2)) engine = innodb;
insert into t1 values(1,2,2),(2,1,1);
alter table t1 drop primary key, add primary key(o3,o1,o2), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) engine = innodb;
insert into t1 values(1,1,2),(1,2,1);
alter table t1 drop primary key, add primary key(o1,o3), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) engine = innodb;
insert into t1 values(1,2,2),(2,1,1);
alter table t1 drop o1, lock=none;
ERROR 42000: Key column 'o1' doesn't exist in table
alter table t1 drop o1, drop primary key, add primary key(o2,o3), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) engine = innodb;
insert into t1 values(1,1,2),(1,2,1);
alter table t1 drop o2, lock=none;
ERROR 42000: Key column 'o2' doesn't exist in table
alter table t1 drop o2, drop primary key, add primary key(o1,o3), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) engine = innodb;
insert into t1 values(1,2,2),(2,1,1);
alter table t1 drop o1, drop o2, lock=none;
ERROR 42000: Key column 'o2' doesn't exist in table
alter table t1 drop o1, drop o2,drop primary key,add primary key(o3),lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1(2), o2)) engine = innodb;
insert into t1 values('abd', 1, 1), ('abc', 2, 2);
alter table t1 drop primary key, add primary key(o1(3), o2), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1(2), o2)) engine = innodb;
insert into t1 values('abd', 1, 1), ('abc', 2, 2);
alter table t1 drop primary key, add primary key(o1, o2), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1(2), o2)) engine = innodb;
insert into t1 values('abd', 1, 1), ('abc', 2, 2);
alter table t1 drop primary key, add primary key(o1(3), o3), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1(2), o2)) engine = innodb;
insert into t1 values('abd', 1, 1), ('abc', 2, 2);
alter table t1 drop primary key, add primary key(o1, o3), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1(3), o2)) engine = innodb;
insert into t1 values('abc', 2, 1), ('abd', 1, 2);
alter table t1 drop primary key, add primary key(o1(2), o2), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1, o2)) engine = innodb;
insert into t1 values('abc', 2, 1), ('abd', 1, 2);
alter table t1 drop primary key, add primary key(o1(2), o2), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1(3), o2)) engine = innodb;
insert into t1 values('abc', 2, 2), ('abd', 1, 1);
alter table t1 drop primary key, add primary key(o1(2), o3), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, o3 int not null, primary key(o1, o2)) engine = innodb;
insert into t1 values('abc', 2, 2), ('abd', 1, 1);
alter table t1 drop primary key, add primary key(o1(2), o3), lock=none;
drop table t1;
create table t1(o1 int, o2 varchar(10), o3 int, primary key(o1,o2(2),o3)) engine = innodb;
insert into t1 values(1, 'abd', 1), (1, 'abc', 2);
alter table t1 drop primary key, add primary key(o1,o2(3)), lock=none;
drop table t1;
create table t1(o1 int, o2 varchar(10), o3 int, primary key(o1,o2(2),o3)) engine = innodb;
insert into t1 values(1, 'abd', 1), (1, 'abc', 2);
alter table t1 drop primary key, add primary key(o1,o2), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1(3),o2(3))) engine = innodb;
insert into t1 values('abc', 'acd'), ('abd', 'abd');
alter table t1 drop primary key, add primary key(o1(2),o2(3)), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1,o2)) engine = innodb;
insert into t1 values('abc', 'acd'), ('abd', 'abd');
alter table t1 drop primary key, add primary key(o1(2),o2), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1(3),o2(3))) engine = innodb;
insert into t1 values('abd', 'acd'), ('acd', 'abd');
alter table t1 drop primary key, add primary key(o2(3),o1(3)), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1,o2)) engine = innodb;
insert into t1 values('abd', 'acd'), ('acd', 'abd');
alter table t1 drop primary key, add primary key(o2,o1), lock=none;
drop table t1;
create table t1(o1 varchar(10), primary key(o1(2))) engine = innodb;
insert into t1 values('abd'), ('acd');
alter table t1 drop primary key, add primary key(o1(3)), lock=none;
drop table t1;
create table t1(o1 varchar(10), primary key(o1(2))) engine = innodb;
insert into t1 values('abd'), ('acd');
alter table t1 drop primary key, add primary key(o1), lock=none;
drop table t1;
create table t1(o1 varchar(10), primary key(o1(2))) engine = innodb;
insert into t1 values('abd'), ('acd');
alter table t1 add n1 int not null, drop primary key, add primary key(o1(3), n1), lock=none;
drop table t1;
create table t1(o1 varchar(10), primary key(o1(2))) engine = innodb;
insert into t1 values('abd'), ('acd');
alter table t1 add n1 int not null, drop primary key, add primary key(o1, n1), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int not null, primary key(o1(2))) engine = innodb;
insert into t1 values('abd', 1), ('acd', 2);
alter table t1 add n1 int not null, drop primary key, add primary key(o1(3), o2), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int not null, primary key(o1(2))) engine = innodb;
insert into t1 values('abd', 1), ('acd', 2);
alter table t1 add n1 int not null, drop primary key, add primary key(o1, o2), lock=none;
drop table t1;
create table t1(o1 varchar(10), primary key(o1(3))) engine = innodb;
insert into t1 values('abd'), ('acd');
alter table t1 drop primary key, add primary key(o1(2)), lock=none;
drop table t1;
create table t1(o1 varchar(10), primary key(o1)) engine = innodb;
insert into t1 values('abd'), ('acd');
alter table t1 drop primary key, add primary key(o1(2)), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, primary key(o1(3), o2)) engine = innodb;
insert into t1 values('abd', 1), ('acd', 2);
alter table t1 drop primary key, add primary key(o1(2)), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, primary key(o1, o2)) engine = innodb;
insert into t1 values('abd', 1), ('acd', 2);
alter table t1 drop primary key, add primary key(o1(2)), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, primary key(o1(3), o2)) engine = innodb;
insert into t1 values('abd', 1), ('acd', 2);
alter table t1 add n1 int not null, drop primary key, add primary key(o1(2),n1), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, primary key(o1, o2)) engine = innodb;
insert into t1 values('abd', 1), ('acd', 2);
alter table t1 add n1 int not null, drop primary key, add primary key(o1(2),n1), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, primary key(o1(3), o2)) engine = innodb;
insert into t1 values('abd', 1), ('acd', 2);
alter table t1 add n1 int not null, drop primary key, add primary key(o1(3),n1), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, primary key(o1, o2)) engine = innodb;
insert into t1 values('abd', 1), ('acd', 2);
alter table t1 add n1 int not null, drop primary key, add primary key(o1,n1), lock=none;
drop table t1;
create table t1(o1 int, o2 varchar(10), primary key(o1,o2(3))) engine = innodb;
insert into t1 values(1,'abd'), (2,'acd');
alter table t1 drop primary key, add primary key(o1,o2(2)), lock=none;
drop table t1;
create table t1(o1 int, o2 varchar(10), primary key(o1,o2)) engine = innodb;
insert into t1 values(1,'abd'), (2,'acd');
alter table t1 drop primary key, add primary key(o1,o2(2)), lock=none;
drop table t1;
create table t1(o1 int, o2 varchar(10), primary key(o1,o2(2))) engine = innodb;
insert into t1 values(1, 'abd'), (2, 'acd');
alter table t1 drop primary key, add primary key(o1,o2(3)), lock=none;
drop table t1;
create table t1(o1 int, o2 varchar(10), primary key(o1,o2(2))) engine = innodb;
insert into t1 values(1, 'abd'), (2, 'acd');
alter table t1 drop primary key, add primary key(o1,o2), lock=none;
drop table t1;
create table t1(o1 int, o2 varchar(10), o3 int, primary key(o1,o2(3),o3)) engine = innodb;
insert into t1 values(1, 'abd', 1), (2, 'acd', 2);
alter table t1 drop primary key, add primary key(o1,o2(2)), lock=none;
drop table t1;
create table t1(o1 int, o2 varchar(10), o3 int, primary key(o1,o2,o3)) engine = innodb;
insert into t1 values(1, 'abd', 1), (2, 'acd', 2);
alter table t1 drop primary key, add primary key(o1,o2(2)), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1(3),o2(3))) engine = innodb;
insert into t1 values('abd', 'acd'), ('acd', 'abd');
alter table t1 drop primary key, add primary key(o1(3),o2(2)), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1,o2)) engine = innodb;
insert into t1 values('abd', 'acd'), ('acd', 'abd');
alter table t1 drop primary key, add primary key(o1,o2(2)), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1(3),o2(2))) engine = innodb;
insert into t1 values('abd', 'acd'), ('acd', 'abd');
alter table t1 drop primary key, add primary key(o1(3),o2(3)), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 varchar(10), primary key(o1,o2(2))) engine = innodb;
insert into t1 values('abd', 'acd'), ('acd', 'abd');
alter table t1 drop primary key, add primary key(o1,o2), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, o3 varchar(10), primary key(o1(3),o2,o3(2))) engine = innodb;
insert into t1 values('abd', 1, 'acd'), ('acd', 2, 'abd');
alter table t1 drop primary key, add primary key(o1(3),o2,o3(3)), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, o3 varchar(10), primary key(o1,o2,o3(2))) engine = innodb;
insert into t1 values('abd', 1, 'acd'), ('acd', 2, 'abd');
alter table t1 drop primary key, add primary key(o1,o2,o3), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, o3 varchar(10), primary key(o1(3),o2,o3(3))) engine = innodb;
insert into t1 values('abd', 1, 'acd'), ('acd', 2, 'abd');
alter table t1 drop primary key, add primary key(o1(3),o2,o3(2)), lock=none;
drop table t1;
create table t1(o1 varchar(10), o2 int, o3 varchar(10), primary key(o1,o2,o3(3))) engine = innodb;
insert into t1 values('abd', 1, 'acd'), ('acd', 2, 'abd');
alter table t1 drop primary key, add primary key(o1,o2,o3(2)), lock=none;
drop table t1;
create table t1(o1 int, o2 int not null, primary key(o1)) engine = innodb;
insert into t1 values(1,1),(2,2);
alter table t1 drop primary key, add primary key(o1,o2), lock=none;
drop table t1;
create table t1(o1 int, o2 int not null, primary key(o1)) engine = innodb;
insert into t1 values(1,1),(2,2);
alter table t1 add n1 int not null, drop primary key, add primary key(o1,n1), lock=none;
drop table t1;
create table t1(o1 int, o2 int not null, primary key(o1)) engine = innodb;
insert into t1 values(1,1),(2,2);
alter table t1 add n1 int not null, drop primary key, add primary key(n1,o1), lock=none;
drop table t1;
create table t1(o1 int, o2 int not null, primary key(o1)) engine = innodb;
insert into t1 values(1,1),(2,2);
alter table t1 add n1 int not null, add n2 int not null, drop primary key, add primary key(n1,o1,n2), lock=none;
drop table t1;
create table t1(o1 int, o2 int not null, primary key(o1)) engine = innodb;
insert into t1 values(1,1),(2,2);
alter table t1 add n1 int not null, add n2 int not null, drop primary key, add primary key(n1,n2,o1), lock=none;
drop table t1;
create table t1(o1 int, o2 int not null, primary key(o1)) engine = innodb;
insert into t1 values(1,1),(2,2);
alter table t1 add n1 int not null, add n2 int not null, drop primary key, add primary key(o1,n1,n2), lock=none;
drop table t1;
create table t1(o1 int, o2 int not null, primary key(o1)) engine = innodb;
insert into t1 values(1,1),(2,2);
alter table t1 add n1 int not null, drop primary key, add primary key(o1,o2,n1), lock=none;
drop table t1;
create table t1(o1 int, o2 int not null, primary key(o1)) engine = innodb;
insert into t1 values(1,1),(2,2);
alter table t1 add n1 int not null, drop primary key, add primary key(o1,n1,o2), lock=none;
drop table t1;
create table t1(o1 int, o2 int not null, primary key(o1)) engine = innodb;
insert into t1 values(1,1),(2,2);
alter table t1 add n1 int not null, drop primary key, add primary key(n1,o1,o2), lock=none;
drop table t1;
create table t1(o1 int, o2 int not null, o3 int not null, primary key(o1)) engine = innodb;
insert into t1 values(1,1,2),(2,2,1);
alter table t1 drop primary key, add primary key(o1,o2,o3), lock=none;
drop table t1;
create table t1(o1 int, o2 int not null, o3 int not null, primary key(o1)) engine = innodb;
insert into t1 values(1,1,2),(2,2,1);
alter table t1 drop primary key, add primary key(o1,o3,o2), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) engine = innodb;
insert into t1 values(1,1,2),(2,2,1);
alter table t1 drop primary key, add primary key(o1,o2), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int, o4 int not null, primary key(o1,o2,o3)) engine = innodb;
insert into t1 values(1,1,2,2),(2,2,1,1);
alter table t1 add n1 int not null, drop primary key, add primary key(o1,o2,o3,o4), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) engine = innodb;
insert into t1 values(1,1,2),(2,2,1);
alter table t1 add n1 int not null, drop primary key, add primary key(o1,o2,n1), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) engine = innodb;
insert into t1 values(1,1,2),(2,2,1);
alter table t1 add n1 int not null, drop primary key, add primary key(o1,n1,o2), lock=none;
drop table t1;
create table t1(o1 int, o2 int, o3 int, primary key(o1,o2,o3)) engine = innodb;
insert into t1 values(1,1,2),(2,2,1);
alter table t1 drop primary key, add primary key(o1), lock=none;
drop table t1;
create table t1(o1 int, o2 int, primary key(o1,o2)) engine = innodb;
insert into t1 values(1,1),(2,1);
alter table t1 drop primary key, add column a int unique auto_increment,
add primary key(o1,o2,a), algorithm=inplace;
drop table t1;
#
# MDEV-15325 Incomplete validation of missing tablespace during recovery
#
CREATE TABLE t1(f1 INT PRIMARY KEY)ENGINE=InnoDB;
CREATE TABLE t2(f1 INT PRIMARY KEY)ENGINE=InnoDB;
# Kill the server
# Wrong space_id in a dirty file and a missing file
# restart
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE SUPPORT COMMENT TRANSACTIONS XA SAVEPOINTS
# Restore t1 and t2
# restart
SELECT * FROM t1;
f1
SELECT * FROM t2;
f1
DROP TABLE t1, t2;
#
# MDEV-18186 assertion failure on missing InnoDB index
#
CREATE TABLE t (a INT, INDEX i1 (a)) ENGINE=INNODB;
DROP TABLE t;
CREATE TABLE t (a INT) ENGINE=INNODB;
SHOW CREATE TABLE t;
Table Create Table
t CREATE TABLE `t` (
`a` int(11) DEFAULT NULL,
KEY `i1` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
Warnings:
Warning 1082 InnoDB: Table test/t contains 0 indexes inside InnoDB, which is different from the number of indexes 1 defined in the MariaDB
Warning 1082 InnoDB: Table test/t contains 0 indexes inside InnoDB, which is different from the number of indexes 1 defined in the MariaDB
DROP TABLE t;
#
# MDEV-27374 InnoDB table becomes corrupt after renaming DESC-indexed column
#
CREATE TABLE t1 (a VARCHAR(8), PRIMARY KEY(a DESC)) ENGINE=InnoDB;
ALTER TABLE t1 RENAME COLUMN a TO b, ALGORITHM=INPLACE;
SELECT TABLE_ID INTO @table_id FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES WHERE NAME="test/t1";
SELECT INDEX_ID INTO @index_id FROM INFORMATION_SCHEMA.INNODB_SYS_INDEXES WHERE TABLE_ID = @table_id;
SELECT NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS WHERE INDEX_ID=@index_id;
NAME
b
DROP TABLE t1;
#
# MDEV-27432 ASC/DESC primary and unique keys cause index
# inconsistency between InnoDB and server
#
CREATE TABLE t1 (id INT NOT NULL, UNIQUE(id DESC)) ENGINE=InnoDB;
ALTER TABLE t1 ADD PRIMARY KEY (id), ALGORITHM=INPLACE;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`id` int(11) NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `id` (`id` DESC)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
DROP TABLE t1;
#
# MDEV-27445 Index inconsistency and assertion failure after
# renaming virtual column with DESC key
#
CREATE TABLE t1(a INT, b INT AS (a), KEY(a, b DESC)) ENGINE=InnoDB;
ALTER TABLE t1 RENAME COLUMN IF EXISTS b TO v;
ALTER TABLE t1 FORCE;
DROP TABLE t1;
#
# MDEV-27592 DESC primary index fails to set wide format
# while renaming the column
#
CREATE TABLE t1 (id INT PRIMARY KEY, a CHAR(8), b INT, KEY(a DESC,b)) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1,'foo',10);
ALTER TABLE t1 RENAME COLUMN b TO c, ALGORITHM=INPLACE;
SELECT TABLE_ID INTO @table_id FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES WHERE NAME="test/t1";
SELECT INDEX_ID INTO @index_id FROM INFORMATION_SCHEMA.INNODB_SYS_INDEXES WHERE TABLE_ID = @table_id ORDER BY INDEX_ID DESC LIMIT 1;
SELECT NAME FROM INFORMATION_SCHEMA.INNODB_SYS_FIELDS WHERE INDEX_ID=@index_id;
NAME
a
c
DROP TABLE t1;
# End of 10.8 tests
#
# MDEV-35849: index records in a wrong order
#
CREATE TABLE t (pk INT PRIMARY KEY, a VARCHAR(1), KEY (a DESC)) ENGINE=InnoDB;
INSERT INTO t VALUES (1,NULL),(2,'x');
CHECK TABLE t;
Table Op Msg_type Msg_text
test.t check status OK
DROP TABLE t;
# End of 11.8 tests
ALTER DATABASE test CHARACTER SET utf8mb4 COLLATE utf8mb4_uca1400_ai_ci;
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