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mariadb/mysql-test/suite/innodb/r/innodb-index-online.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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SET GLOBAL innodb_monitor_reset_all=all;
SET GLOBAL innodb_monitor_reset_all=default;
call mtr.add_suppression("InnoDB: Warning: Small buffer pool size");
CREATE TABLE t1 (c1 INT PRIMARY KEY, c2 INT, c3 TEXT)
ENGINE=InnoDB STATS_PERSISTENT=0;
INSERT INTO t1 VALUES (1,1,''), (2,2,''), (3,3,''), (4,4,''), (5,5,'');
SET GLOBAL innodb_monitor_enable = module_ddl;
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 0
ddl_pending_alter_table 0
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 0
SET DEBUG_SYNC = 'RESET';
SET DEBUG_SYNC = 'write_row_noreplace SIGNAL have_handle WAIT_FOR go_ahead';
INSERT INTO t1 VALUES(1,2,3);
connect con1,localhost,root,,;
SET DEBUG_SYNC = 'now WAIT_FOR have_handle';
SET lock_wait_timeout = 1;
ALTER TABLE t1 ADD UNIQUE INDEX(c2);
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SET DEBUG_SYNC = 'now SIGNAL go_ahead';
connection default;
ERROR 23000: Duplicate entry '1' for key 'PRIMARY'
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 0
ddl_pending_alter_table 0
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 0
connection con1;
SET @saved_debug_dbug = @@SESSION.debug_dbug;
SET DEBUG_DBUG = '+d,innodb_OOM_prepare_inplace_alter';
ALTER TABLE t1 ADD UNIQUE INDEX(c2);
ERROR HY000: Out of memory.
SET DEBUG_DBUG = @saved_debug_dbug;
SET DEBUG_DBUG = '+d,innodb_OOM_inplace_alter';
CREATE UNIQUE INDEX c2 ON t1(c2);
ERROR HY000: Out of memory.
SET DEBUG_DBUG = @saved_debug_dbug;
SET DEBUG_DBUG = '+d,innodb_OOM_prepare_add_index';
ALTER TABLE t1 ADD KEY(c2), ADD KEY c3_10(c3(10)), ADD KEY c3_c2(c3(4),c2);
ERROR HY000: Out of memory.
SET DEBUG_DBUG = @saved_debug_dbug;
CREATE UNIQUE INDEX c2 ON t1(c2);
DROP INDEX c2 ON t1;
connection default;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`c1` int(11) NOT NULL,
`c2` int(11) DEFAULT NULL,
`c3` text DEFAULT NULL,
PRIMARY KEY (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci STATS_PERSISTENT=0
BEGIN;
INSERT INTO t1 VALUES(7,4,2);
connection con1;
SET DEBUG_SYNC = 'row_log_apply_before SIGNAL scanned WAIT_FOR rollback_done';
ALTER TABLE t1 ADD UNIQUE INDEX(c2);
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection default;
COMMIT;
connection con1;
ALTER TABLE t1 ADD UNIQUE INDEX(c2);
ERROR 23000: Duplicate entry '4' for key 'c2'
connection default;
DELETE FROM t1 WHERE c1 = 7;
connection con1;
ALTER TABLE t1 ADD FOREIGN KEY(c2) REFERENCES t1(c2), ALGORITHM = INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: Adding foreign keys needs foreign_key_checks=OFF. Try ALGORITHM=COPY
ALTER TABLE t1 ADD UNIQUE INDEX(c2), LOCK = EXCLUSIVE, ALGORITHM = INPLACE;
DROP INDEX c2 ON t1;
ALTER TABLE t1 ADD UNIQUE INDEX(c2);
connection default;
SET DEBUG_SYNC = 'now WAIT_FOR scanned';
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 1
ddl_pending_alter_table 1
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 0
BEGIN;
INSERT INTO t1 VALUES(7,4,2);
COMMIT;
DELETE FROM t1 where c1 = 7;
SET DEBUG_SYNC = 'now SIGNAL rollback_done';
connection con1;
ERROR 23000: Duplicate entry '4' for key 'c2'
SET DEBUG_SYNC = 'row_log_apply_after SIGNAL created WAIT_FOR dml_done';
ALTER TABLE t1 ADD UNIQUE INDEX(c2);
connection default;
SET DEBUG_SYNC = 'now WAIT_FOR created';
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 1
ddl_pending_alter_table 1
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 0
INSERT INTO t1 VALUES(6,3,1);
SET DEBUG_SYNC = 'now SIGNAL dml_done';
connection con1;
ERROR 23000: Duplicate entry '' for key '*UNKNOWN*'
DELETE FROM t1 WHERE c1=6;
ALTER TABLE t1 ADD UNIQUE INDEX(c2);
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 0
ddl_pending_alter_table 0
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 0
connection default;
INSERT INTO t1 VALUES(6,3,1);
ERROR 23000: Duplicate entry '3' for key 'c2'
INSERT INTO t1 VALUES(7,4,2);
ERROR 23000: Duplicate entry '4' for key 'c2'
ALTER TABLE t1 STATS_PERSISTENT=1;
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze Warning Engine-independent statistics are not collected for column 'c3'
test.t1 analyze status OK
UPDATE mysql.innodb_index_stats SET stat_value = 5
WHERE database_name = 'test' AND table_name= 't1' AND index_name = 'PRIMARY'
AND stat_value = 6;
SELECT * FROM mysql.innodb_index_stats WHERE table_name IN ('t1');
database_name table_name index_name last_update stat_name stat_value sample_size stat_description
test t1 PRIMARY LAST_UPDATE n_diff_pfx01 5 1 c1
test t1 PRIMARY LAST_UPDATE n_leaf_pages 1 NULL Number of leaf pages in the index
test t1 PRIMARY LAST_UPDATE size 1 NULL Number of pages in the index
test t1 c2 LAST_UPDATE n_diff_pfx01 5 1 c2
test t1 c2 LAST_UPDATE n_leaf_pages 1 NULL Number of leaf pages in the index
test t1 c2 LAST_UPDATE size 1 NULL Number of pages in the index
CREATE TABLE t1_c2_stats SELECT * FROM mysql.innodb_index_stats
WHERE database_name = 'test' AND table_name = 't1' and index_name = 'c2';
ALTER TABLE t1_c2_stats ENGINE=INNODB;
DROP INDEX c2 ON t1;
ANALYZE TABLE t1_c2_stats;
Table Op Msg_type Msg_text
test.t1_c2_stats analyze status Engine-independent statistics collected
test.t1_c2_stats analyze status OK
SELECT * FROM mysql.innodb_index_stats WHERE table_name IN ('t1', 't1_c2_stats');
database_name table_name index_name last_update stat_name stat_value sample_size stat_description
test t1 PRIMARY LAST_UPDATE n_diff_pfx01 5 1 c1
test t1 PRIMARY LAST_UPDATE n_leaf_pages 1 NULL Number of leaf pages in the index
test t1 PRIMARY LAST_UPDATE size 1 NULL Number of pages in the index
test t1_c2_stats GEN_CLUST_INDEX LAST_UPDATE n_diff_pfx01 3 1 DB_ROW_ID
test t1_c2_stats GEN_CLUST_INDEX LAST_UPDATE n_leaf_pages 1 NULL Number of leaf pages in the index
test t1_c2_stats GEN_CLUST_INDEX LAST_UPDATE size 1 NULL Number of pages in the index
connection con1;
KILL QUERY @id;
ERROR 70100: Query execution was interrupted
SET GLOBAL innodb_max_purge_lag_wait=0;
SET DEBUG_SYNC = 'row_log_apply_before SIGNAL c2d_created WAIT_FOR kill_done';
CREATE INDEX c2d ON t1(c2);
connection default;
SET DEBUG_SYNC = 'now WAIT_FOR c2d_created';
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 1
ddl_pending_alter_table 1
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 0
KILL QUERY @id;
SET DEBUG_SYNC = 'now SIGNAL kill_done';
connection con1;
ERROR 70100: Query execution was interrupted
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 0
ddl_pending_alter_table 0
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 0
connection default;
CHECK TABLE t1;
Table Op Msg_type Msg_text
test.t1 check status OK
INSERT INTO t1 SELECT 5 + c1, c2, c3 FROM t1;
INSERT INTO t1 SELECT 10 + c1, c2, c3 FROM t1;
INSERT INTO t1 SELECT 20 + c1, c2, c3 FROM t1;
INSERT INTO t1 SELECT 40 + c1, c2, c3 FROM t1;
EXPLAIN SELECT COUNT(*) FROM t1 WHERE c2 > 3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze Warning Engine-independent statistics are not collected for column 'c3'
test.t1 analyze status OK
connection con1;
UPDATE t1_c2_stats SET index_name = 'c2d';
UPDATE t1_c2_stats SET stat_value = 2 WHERE stat_name = 'n_diff_pfx01';
INSERT INTO t1_c2_stats
SELECT database_name, table_name, index_name, last_update, 'n_diff_pfx02', 80,
sample_size, 'c2,c1' FROM t1_c2_stats
WHERE stat_name = 'n_diff_pfx01' AND stat_description = 'c2';
INSERT INTO mysql.innodb_index_stats SELECT * FROM t1_c2_stats;
DROP TABLE t1_c2_stats;
CREATE INDEX c2d ON t1(c2);
SHOW INDEX FROM t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Ignored
t1 0 PRIMARY 1 c1 A 80 NULL NULL BTREE NO
t1 1 c2d 1 c2 A 5 NULL NULL YES BTREE NO
EXPLAIN SELECT COUNT(*) FROM t1 WHERE c2 > 3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c2d c2d 5 NULL 32 Using where; Using index
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`c1` int(11) NOT NULL,
`c2` int(11) DEFAULT NULL,
`c3` text DEFAULT NULL,
PRIMARY KEY (`c1`),
KEY `c2d` (`c2`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci STATS_PERSISTENT=1
connection default;
SET @merge_encrypt_0=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');
SET @merge_decrypt_0=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_merge_blocks_decrypted');
SET @rowlog_encrypt_0=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
connection con1;
SET DEBUG_SYNC = 'row_log_apply_before SIGNAL c2e_created WAIT_FOR dml2_done';
SET lock_wait_timeout = 10;
ALTER TABLE t1 CHANGE c2 c22 INT, DROP INDEX c2d, ADD INDEX c2e(c22, c3(10)), ALGORITHM = NOCOPY;
connection default;
INSERT INTO t1 SELECT 80 + c1, c2, c3 FROM t1;
INSERT INTO t1 SELECT 160 + c1, c2, c3 FROM t1;
SET DEBUG_SYNC = 'now WAIT_FOR c2e_created';
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 1
ddl_pending_alter_table 1
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 0
UPDATE t1 SET c2 = c2 + 1;
UPDATE t1 SET c2 = c2 + 2;
UPDATE t1 SET c2 = c2 + 1;
UPDATE t1 SET c2 = c2 + 2;
UPDATE t1 SET c2 = c2 + 1;
UPDATE t1 SET c2 = c2 + 2;
UPDATE t1 SET c2 = c2 + 1;
UPDATE t1 SET c2 = c2 + 2;
UPDATE t1 SET c2 = c2 + 1;
UPDATE t1 SET c2 = c2 + 2;
UPDATE t1 SET c2 = c2 + 1;
UPDATE t1 SET c2 = c2 + 2;
UPDATE t1 SET c2 = c2 + 1;
UPDATE t1 SET c2 = c2 + 2;
UPDATE t1 SET c2 = c2 + 1;
UPDATE t1 SET c2 = c2 + 2;
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 1
ddl_pending_alter_table 1
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 1
SELECT sf.name, sf.pos FROM INFORMATION_SCHEMA.INNODB_SYS_INDEXES si
INNER JOIN INFORMATION_SCHEMA.INNODB_SYS_FIELDS sf
ON si.index_id = sf.index_id WHERE si.name = '?c2e';
name pos
c2 0
c3 1
SET @merge_encrypt_1=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');
SET @merge_decrypt_1=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_merge_blocks_decrypted');
SET @rowlog_encrypt_1=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
SELECT
(@merge_encrypt_1-@merge_encrypt_0)-
(@merge_decrypt_1-@merge_decrypt_0) as sort_balance,
@merge_encrypt_1>@merge_encrypt_0, @merge_decrypt_1>@merge_decrypt_0,
@rowlog_encrypt_1>@rowlog_encrypt_0;
sort_balance @merge_encrypt_1>@merge_encrypt_0 @merge_decrypt_1>@merge_decrypt_0 @rowlog_encrypt_1>@rowlog_encrypt_0
0 0 0 0
SET DEBUG_SYNC = 'now SIGNAL dml2_done';
connection con1;
ERROR HY000: Creating index 'c2e' required more than 'innodb_online_alter_log_max_size' bytes of modification log. Please try again
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 1
ddl_online_create_index 1
ddl_pending_alter_table 0
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 1
SELECT sf.name, sf.pos FROM INFORMATION_SCHEMA.INNODB_SYS_INDEXES si
INNER JOIN INFORMATION_SCHEMA.INNODB_SYS_FIELDS sf
ON si.index_id = sf.index_id WHERE si.name = 'c2e';
name pos
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 1
ddl_online_create_index 1
ddl_pending_alter_table 0
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 1
connection default;
ALTER TABLE t1 COMMENT 'testing if c2e will be dropped';
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 0
ddl_pending_alter_table 0
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 1
SET @merge_encrypt_1=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');
SET @merge_decrypt_1=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_merge_blocks_decrypted');
SET @rowlog_encrypt_1=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
SET @rowlog_decrypt_1=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_decrypted');
connection con1;
SET DEBUG_SYNC = 'row_log_apply_before SIGNAL c2f_created WAIT_FOR dml3_done';
ALTER TABLE t1 ADD INDEX c2f(c22f), CHANGE c2 c22f INT;
connection default;
SET DEBUG_SYNC = 'now WAIT_FOR c2f_created';
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 1
ddl_pending_alter_table 1
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 1
BEGIN;
INSERT INTO t1 SELECT 320 + c1, c2, c3 FROM t1 WHERE c1 > 160;
DELETE FROM t1 WHERE c1 > 320;
COMMIT;
BEGIN;
UPDATE t1 SET c2 = c2 + 1;
COMMIT;
BEGIN;
INSERT INTO t1 SELECT 320 + c1, c2, c3 FROM t1 WHERE c1 > 160;
DELETE FROM t1 WHERE c1 > 320;
COMMIT;
BEGIN;
UPDATE t1 SET c2 = c2 + 1;
COMMIT;
BEGIN;
INSERT INTO t1 SELECT 320 + c1, c2, c3 FROM t1 WHERE c1 > 160;
DELETE FROM t1 WHERE c1 > 320;
COMMIT;
BEGIN;
UPDATE t1 SET c2 = c2 + 1;
COMMIT;
BEGIN;
INSERT INTO t1 SELECT 320 + c1, c2, c3 FROM t1 WHERE c1 > 160;
DELETE FROM t1 WHERE c1 > 320;
COMMIT;
BEGIN;
UPDATE t1 SET c2 = c2 + 1;
COMMIT;
BEGIN;
INSERT INTO t1 SELECT 320 + c1, c2, c3 FROM t1 WHERE c1 > 160;
DELETE FROM t1 WHERE c1 > 320;
COMMIT;
BEGIN;
UPDATE t1 SET c2 = c2 + 1;
COMMIT;
BEGIN;
INSERT INTO t1 SELECT 320 + c1, c2, c3 FROM t1 WHERE c1 > 160;
DELETE FROM t1 WHERE c1 > 320;
COMMIT;
BEGIN;
UPDATE t1 SET c2 = c2 + 1;
COMMIT;
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 1
ddl_pending_alter_table 1
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 2
SET DEBUG_SYNC = 'now SIGNAL dml3_done';
connection con1;
Warnings:
Note 1831 Duplicate index `c2f`. This is deprecated and will be disallowed in a future release
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 0
ddl_pending_alter_table 0
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 2
connection default;
SET @merge_encrypt_2=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');
SET @merge_decrypt_2=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_merge_blocks_decrypted');
SET @rowlog_encrypt_2=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
SET @rowlog_decrypt_2=
(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_decrypted');
SELECT
(@merge_encrypt_2-@merge_encrypt_1)-
(@merge_decrypt_2-@merge_decrypt_1) as sort_balance,
(@rowlog_encrypt_2-@rowlog_encrypt_1)-
(@rowlog_decrypt_2-@rowlog_decrypt_1) as log_balance;
sort_balance log_balance
0 0
SELECT
@merge_encrypt_2-@merge_encrypt_1>0 as sort_encrypted,
@merge_decrypt_2-@merge_decrypt_1>0 as sort_decrypted,
@rowlog_encrypt_2-@rowlog_encrypt_1>0 as log_encrypted,
@rowlog_decrypt_2-@rowlog_decrypt_1>0 as log_decrypted;
sort_encrypted sort_decrypted log_encrypted log_decrypted
0 0 0 0
connection con1;
SELECT COUNT(c22f) FROM t1;
COUNT(c22f)
320
CHECK TABLE t1;
Table Op Msg_type Msg_text
test.t1 check status OK
SET GLOBAL innodb_max_purge_lag_wait=0;
ALTER TABLE t1 ADD UNIQUE INDEX c3p5(c3(5));
ERROR 23000: Duplicate entry 'NULL' for key 'c3p5'
UPDATE t1 SET c3 = NULL WHERE c3 = '';
SET lock_wait_timeout = 1;
SET DEBUG_SYNC = 'row_log_apply_before SIGNAL c3p5_created WAIT_FOR ins_done';
ALTER TABLE t1 ADD UNIQUE INDEX c3p5(c3(5));
connection default;
SET DEBUG_SYNC = 'now WAIT_FOR c3p5_created';
SELECT sf.name, sf.pos FROM INFORMATION_SCHEMA.INNODB_SYS_INDEXES si
INNER JOIN INFORMATION_SCHEMA.INNODB_SYS_FIELDS sf
ON si.index_id = sf.index_id WHERE si.name = '?c3p5';
name pos
c3 0
SET DEBUG_SYNC = 'ib_after_row_insert SIGNAL ins_done WAIT_FOR ddl_timed_out';
INSERT INTO t1 VALUES(347,33101,NULL);
connection con1;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SET DEBUG_SYNC = 'now SIGNAL ddl_timed_out';
SELECT sf.name, sf.pos FROM INFORMATION_SCHEMA.INNODB_SYS_INDEXES si
INNER JOIN INFORMATION_SCHEMA.INNODB_SYS_FIELDS sf
ON si.index_id = sf.index_id WHERE si.name = 'c3p5';
name pos
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 1
ddl_online_create_index 1
ddl_pending_alter_table 0
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 2
connection default;
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 1
ddl_online_create_index 1
ddl_pending_alter_table 0
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 2
connection default;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`c1` int(11) NOT NULL,
`c22f` int(11) DEFAULT NULL,
`c3` text DEFAULT NULL,
PRIMARY KEY (`c1`),
KEY `c2d` (`c22f`),
KEY `c2f` (`c22f`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci STATS_PERSISTENT=1 COMMENT='testing if c2e will be dropped'
ALTER TABLE t1 DROP INDEX c2d, DROP INDEX c2f;
SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
name count
ddl_background_drop_indexes 0
ddl_online_create_index 0
ddl_pending_alter_table 0
ddl_sort_file_alter_table 0
ddl_log_file_alter_table 2
ALTER TABLE t1 ADD INDEX c2h(c22f), ALGORITHM = INPLACE;
ALTER TABLE t1 ADD INDEX c2h(c22f), ALGORITHM = COPY;
ERROR 42000: Duplicate key name 'c2h'
SET DEBUG_SYNC = 'RESET';
SET GLOBAL innodb_monitor_disable = module_ddl;
DROP TABLE t1;
#
# MDEV-13205 assertion !dict_index_is_online_ddl(index) upon ALTER TABLE
#
CREATE TABLE t1 (c VARCHAR(64)) ENGINE=InnoDB;
INSERT INTO t1 VALUES('foo');
SET DEBUG_SYNC = 'row_log_apply_before SIGNAL t1u_created WAIT_FOR dup_done';
ALTER TABLE t1 ADD UNIQUE(c);
connection con1;
SET DEBUG_SYNC = 'now WAIT_FOR t1u_created';
INSERT INTO t1 VALUES('bar'),('bar');
SET DEBUG_SYNC = 'now SIGNAL dup_done';
connection default;
ERROR 23000: Duplicate entry 'bar' for key 'c'
SET DEBUG_SYNC = 'RESET';
disconnect con1;
CREATE TABLE t2 (c VARCHAR(64)) ENGINE=InnoDB;
ALTER TABLE t2 ADD FOREIGN KEY (c) REFERENCES t1 (c);
ERROR HY000: Missing index for constraint 't2.1' in the referenced table 't1'
DROP TABLE t2,t1;
CREATE TABLE t1 (a INT PRIMARY KEY, b INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES(0,0);
connect con1,localhost,root,,;
SET DEBUG_SYNC = 'row_log_apply_before SIGNAL created WAIT_FOR inserted';
ALTER TABLE t1 ADD INDEX(b);
connection default;
SET DEBUG_SYNC = 'now WAIT_FOR created';
BEGIN;
INSERT INTO t1 VALUES(1,1);
ROLLBACK;
SET DEBUG_SYNC = 'now SIGNAL inserted';
connection con1;
connection default;
SELECT * FROM t1;
a b
0 0
CHECK TABLE t1;
Table Op Msg_type Msg_text
test.t1 check status OK
DROP TABLE t1;
#
# MDEV-36281 DML aborts during online virtual index
#
CREATE TABLE t1(f1 INT NOT NULL PRIMARY KEY, f2 INT NOT NULL,
f3 INT NOT NULL, f4 INT AS (f3) VIRTUAL,
f5 INT AS (f1) VIRTUAL, INDEX(f4))ENGINE=InnoDB;
INSERT INTO t1(f1, f2, f3) VALUES(1, 2, 3);
SET DEBUG_SYNC = 'innodb_inplace_alter_table_enter SIGNAL dml_start WAIT_FOR dml_finish';
ALTER TABLE t1 ADD INDEX v1(f5, f2, f4), ADD INDEX v2(f3, f5);
connection con1;
set DEBUG_SYNC="now WAIT_FOR dml_start";
UPDATE t1 SET f3= f3 + 1;
set DEBUG_SYNC="now SIGNAL dml_finish";
disconnect con1;
connection default;
CHECK TABLE t1 EXTENDED;
Table Op Msg_type Msg_text
test.t1 check status OK
SELECT f5, f2, f4 FROM t1 USE INDEX(v1);
f5 f2 f4
1 2 4
SELECT f3, f5 FROM t1 USE INDEX(v2);
f3 f5
4 1
DROP TABLE t1;
SET DEBUG_SYNC = 'RESET';
SET GLOBAL innodb_monitor_enable = default;
SET GLOBAL innodb_monitor_disable = default;
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