SET @save_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
SET @old_instant=
(SELECT variable_value FROM information_schema.global_status
WHERE variable_name = 'innodb_instant_alter_column');
CREATE TABLE t1 (
pk INT AUTO_INCREMENT PRIMARY KEY,
c1 INT,
c2 VARCHAR(255),
c3 VARCHAR(255),
c4 INT,
c5 INT,
c6 INT,
c7 VARCHAR(255),
c8 TIMESTAMP NULL
) ENGINE=InnoDB;
INSERT INTO t1 VALUES (NULL,1,NULL,'foo',NULL,1,NULL,NULL,'2011-11-11 00:00:00');
ALTER TABLE t1 ADD COLUMN f INT;
REPLACE INTO t1 (c7) VALUES ('bar');
CREATE TABLE t2 (i INT PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t2 VALUES (-1),(1);
ALTER TABLE t2 ADD COLUMN j INT;
BEGIN;
DELETE FROM t2;
ROLLBACK;
TRUNCATE TABLE t2;
INSERT INTO t2 VALUES (1,2);
CREATE TABLE t3 (pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t3 () VALUES ();
ALTER TABLE t3 ADD COLUMN f INT;
UPDATE t3 SET pk = DEFAULT;
SELECT * FROM t3;
pk	f
0	NULL
CREATE TABLE t4 (pk INT PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t4 VALUES (0);
ALTER TABLE t4 ADD COLUMN b INT;
SELECT COUNT(*)>0 FROM INFORMATION_SCHEMA.COLUMNS
LEFT JOIN t4 ON (NUMERIC_SCALE = pk);
COUNT(*)>0
1
ALTER TABLE t4 ADD COLUMN c INT;
CREATE TABLE t5 (i INT, KEY(i)) ENGINE=InnoDB;
INSERT INTO t5 VALUES (-42);
ALTER TABLE t5 ADD UNIQUE ui(i);
ALTER TABLE t5 ADD COLUMN i2 INT, DROP INDEX i;
CREATE TABLE t6 (i INT NOT NULL) ENGINE=InnoDB;
INSERT INTO t6 VALUES (0);
ALTER TABLE t6 ADD COLUMN j INT;
TRUNCATE TABLE t6;
INSERT INTO t6 VALUES (1,2);
CREATE TABLE t7 (i INT) ENGINE=InnoDB;
INSERT INTO t7 VALUES (1),(2),(3),(4),(5);
ALTER TABLE t7 ADD t TEXT DEFAULT '';
CREATE TABLE t8 (i INT) ENGINE=InnoDB ROW_FORMAT=REDUNDANT;
INSERT INTO t8 VALUES (NULL);
ALTER TABLE t8 ADD c CHAR(3);
SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL rebuilt WAIT_FOR dml';
ALTER TABLE t8 FORCE;
connect  dml,localhost,root,,;
SET DEBUG_SYNC='now WAIT_FOR rebuilt';
BEGIN;
INSERT INTO t8 SET i=1;
UPDATE t8 SET i=ISNULL(i);
ROLLBACK;
SET DEBUG_SYNC='now SIGNAL dml';
connection default;
SET DEBUG_SYNC='RESET';
CREATE TABLE t9 (
pk INT AUTO_INCREMENT PRIMARY KEY,
c1 BIGINT UNSIGNED,
c2 TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP,
c3 BIGINT,
c4 VARCHAR(257) CHARACTER SET utf8,
c5 TINYINT UNSIGNED,
c6 TINYINT,
c7 VARCHAR(257) CHARACTER SET latin1,
c8 VARCHAR(257) CHARACTER SET binary
) ENGINE=InnoDB;
INSERT INTO t9 () VALUES ();
ALTER TABLE t9 ADD COLUMN IF NOT EXISTS t TIMESTAMP NULL KEY;
Warnings:
Note	1061	Multiple primary key defined
SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL rebuilt WAIT_FOR dml';
OPTIMIZE TABLE t9;
connection dml;
SET DEBUG_SYNC='now WAIT_FOR rebuilt';
BEGIN;
INSERT INTO t9 () VALUES (),();
UPDATE t9 SET t=current_timestamp();
ROLLBACK;
SET DEBUG_SYNC='now SIGNAL dml';
disconnect dml;
connection default;
Table	Op	Msg_type	Msg_text
test.t9	optimize	note	Table does not support optimize, doing recreate + analyze instead
test.t9	optimize	status	OK
SET DEBUG_SYNC='RESET';
CREATE TABLE t10 (pk INT DEFAULT 0 KEY) ENGINE=InnoDB;
INSERT INTO t10 (pk) VALUES (1);
ALTER TABLE t10 ADD c INT;
TRUNCATE TABLE t10;
INSERT INTO t10 VALUES (1,1),(2,2);
ALTER TABLE t10 FORCE;
CREATE TABLE t11 (
c01 enum('a','b'),
c02 bit,
c03 blob,
c04 enum('c','d'),
c05 blob,
c06 decimal,
c07 char(1),
c08 int,
c09 char(1),
c10 set('e','f'),
c11 char(1),
c12 float,
c13 bit,
c14 char(1),
c15 int,
c16 float,
c17 decimal,
c18 char(1) CHARACTER SET utf8 not null default '',
c19 float,
c20 set('g','h'),
c21 char(1),
c22 int,
c23 int,
c24 int,
c25 set('i','j'),
c26 decimal,
c27 float,
c28 char(1),
c29 int,
c30 enum('k','l'),
c31 decimal,
c32 char(1),
c33 decimal,
c34 bit,
c35 enum('m','n'),
c36 set('o','p'),
c37 enum('q','r'),
c38 blob,
c39 decimal,
c40 blob not null default '',
c41 char(1),
c42 int,
c43 float,
c44 float,
c45 enum('s','t'),
c46 decimal,
c47 set('u','v'),
c48 enum('w','x'),
c49 set('y','z'),
c50 float
) ENGINE=InnoDB;
INSERT INTO t11 () VALUES  ();
ALTER TABLE t11 ADD COLUMN f INT;
INSERT INTO t11 () VALUES ();
UPDATE t11 SET c22 = 1;
InnoDB		0 transactions not purged
DROP TABLE t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11;
#
# MDEV-15060 Assertion in row_log_table_apply_op after instant ADD
# when the table is emptied during subsequent ALTER TABLE
#
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (NULL);
ALTER TABLE t1 ADD COLUMN b INT NOT NULL;
connect stop_purge,localhost,root;
START TRANSACTION WITH CONSISTENT SNAPSHOT;
connect ddl,localhost,root,,test;
DELETE FROM t1;
SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL copied WAIT_FOR logged';
ALTER TABLE t1 FORCE;
connection default;
SET DEBUG_SYNC='now WAIT_FOR copied';
BEGIN;
INSERT INTO t1 SET b=1;
ROLLBACK;
connection stop_purge;
COMMIT;
connection default;
InnoDB		2 transactions not purged
SET DEBUG_SYNC='now SIGNAL logged';
connection ddl;
connection default;
DROP TABLE t1;
SET DEBUG_SYNC='RESET';
#
# MDEV-16131 Assertion failed in dict_index_t::instant_field_value()
#
CREATE TABLE t1 (a INT PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t1 SET a=0;
ALTER TABLE t1 ADD COLUMN b INT NOT NULL DEFAULT 2, ADD COLUMN c INT;
connection stop_purge;
START TRANSACTION WITH CONSISTENT SNAPSHOT;
connection default;
DELETE FROM t1;
connection ddl;
SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL copied WAIT_FOR logged';
ALTER TABLE t1 FORCE;
connection stop_purge;
COMMIT;
connection default;
SET DEBUG_SYNC = 'now WAIT_FOR copied';
InnoDB		1 transactions not purged
INSERT INTO t1 SET a=1;
INSERT INTO t1 SET a=2,b=3,c=4;
SET DEBUG_SYNC = 'now SIGNAL logged';
connection ddl;
connection default;
SET DEBUG_SYNC = RESET;
SELECT * FROM t1;
a	b	c
1	2	NULL
2	3	4
ALTER TABLE t1 DROP b, ALGORITHM=INSTANT;
connection stop_purge;
START TRANSACTION WITH CONSISTENT SNAPSHOT;
connection default;
DELETE FROM t1;
connection ddl;
SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL copied WAIT_FOR logged';
ALTER TABLE t1 ADD COLUMN b INT NOT NULL DEFAULT 2 AFTER a, FORCE;
disconnect stop_purge;
connection default;
SET DEBUG_SYNC = 'now WAIT_FOR copied';
InnoDB		1 transactions not purged
INSERT INTO t1 SET a=1;
INSERT INTO t1 SET a=2,c=4;
SET DEBUG_SYNC = 'now SIGNAL logged';
connection ddl;
UPDATE t1 SET b = b + 1 WHERE a = 2;
connection default;
SET DEBUG_SYNC = RESET;
SELECT * FROM t1;
a	b	c
1	2	NULL
2	3	4
#
# MDEV-15872 Crash in online ALTER TABLE...ADD PRIMARY KEY
# after instant ADD COLUMN ... NULL
#
ALTER TABLE t1 ADD COLUMN d INT, ALGORITHM=INSTANT;
UPDATE t1 SET d=1;
connection ddl;
SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL copied WAIT_FOR logged';
ALTER TABLE t1 DROP PRIMARY KEY, ADD PRIMARY KEY (a,d);
connection default;
SET DEBUG_SYNC = 'now WAIT_FOR copied';
BEGIN;
INSERT INTO t1 SET a=3;
ROLLBACK;
SET DEBUG_SYNC = 'now SIGNAL logged';
connection ddl;
ERROR 22004: Invalid use of NULL value
disconnect ddl;
connection default;
SET DEBUG_SYNC = RESET;
SELECT * FROM t1;
a	b	c	d
1	2	NULL	1
2	3	4	1
DROP TABLE t1;
#
# MDEV-19916 Corruption after instant ADD/DROP and shrinking the tree
#
CREATE TABLE t1 (a INT PRIMARY KEY) ENGINE=InnoDB;
SET @old_limit = @@innodb_limit_optimistic_insert_debug;
SET GLOBAL innodb_limit_optimistic_insert_debug = 2;
INSERT INTO t1 VALUES (1),(5),(4),(3),(2);
SET GLOBAL innodb_limit_optimistic_insert_debug = @old_limit;
ALTER TABLE t1 ADD COLUMN b INT, ALGORITHM=INSTANT;
SET @old_defragment = @@innodb_defragment;
SET GLOBAL innodb_defragment = 1;
OPTIMIZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	optimize	status	OK
SET GLOBAL innodb_defragment = @old_defragment;
ALTER TABLE t1 ADD vb INT AS (b) VIRTUAL;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1;
a	b	vb
1	NULL	NULL
2	NULL	NULL
3	NULL	NULL
4	NULL	NULL
5	NULL	NULL
DROP TABLE t1;
#
# MDEV-17899 Assertion failures on rollback of instant ADD/DROP
# MDEV-18098 Crash after rollback of instant DROP COLUMN
#
SET @save_dbug = @@SESSION.debug_dbug;
SET debug_dbug='+d,ib_commit_inplace_fail_1';
CREATE TABLE t1 (a int, b int) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1,2);
ALTER TABLE t1 DROP COLUMN b;
ERROR HY000: Internal error: Injected error!
ALTER TABLE t1 DROP COLUMN b;
ERROR HY000: Internal error: Injected error!
ALTER TABLE t1 ADD COLUMN c INT;
ERROR HY000: Internal error: Injected error!
SELECT * FROM t1;
a	b
1	2
DROP TABLE t1;
CREATE TABLE t1 (a int, b int) ENGINE=InnoDB;
ALTER TABLE t1 ADD COLUMN c INT;
ERROR HY000: Internal error: Injected error!
BEGIN;
INSERT INTO t1 VALUES(1, 1);
ROLLBACK;
ALTER TABLE t1 DROP COLUMN b;
ERROR HY000: Internal error: Injected error!
INSERT INTO t1 values (1,1);
SELECT * FROM t1;
a	b
1	1
DROP TABLE t1;
SET debug_dbug = @save_dbug;
SELECT variable_value-@old_instant instants
FROM information_schema.global_status
WHERE variable_name = 'innodb_instant_alter_column';
instants
22
#
# MDEV-21045 AddressSanitizer: use-after-poison in mem_heap_dup / row_log_table_get_pk_col
#
CREATE TABLE t1 (a TEXT) ENGINE = InnoDB ROW_FORMAT=REDUNDANT;
INSERT INTO t1 (a) VALUES ('foo');
ALTER TABLE t1 ADD COLUMN b INT DEFAULT 0,algorithm=instant;
connect  con2,localhost,root,,test;
SET DEBUG_SYNC='innodb_inplace_alter_table_enter SIGNAL onlinealter WAIT_FOR update';
ALTER TABLE t1 ADD PRIMARY KEY (b);
connection default;
SET DEBUG_SYNC='now WAIT_FOR onlinealter';
UPDATE t1 SET b = 1;
SET DEBUG_SYNC='now SIGNAL update';
connection con2;
connection default;
DROP TABLE t1;
#
# MDEV-21658 Error on online ADD PRIMARY KEY after instant DROP/reorder
#
CREATE TABLE t1 (a INT, b INT, c INT, col INT) ENGINE=InnoDB;
INSERT INTO t1 () VALUES ();
ALTER TABLE t1 DROP b, DROP c, DROP col;
ALTER TABLE t1 ADD COLUMN col INT;
ALTER TABLE t1 DROP a, DROP col, ADD COLUMN b INT;
connection con2;
SET SQL_MODE= '';
SET DEBUG_SYNC = 'row_log_table_apply1_before SIGNAL scanned WAIT_FOR dml';
ALTER TABLE t1 ADD PRIMARY KEY(b);
connection default;
SET DEBUG_SYNC = 'now WAIT_FOR scanned';
UPDATE t1 SET b = 1;
SET DEBUG_SYNC = 'now SIGNAL dml';
connection con2;
Warnings:
Warning	1265	Data truncated for column 'b' at row 1
connection default;
SELECT * FROM t1;
b
1
SET DEBUG_SYNC='RESET';
disconnect con2;
DROP TABLE t1;
#
# MDEV-24512 Assertion failed in rec_is_metadata()
#            in btr_discard_only_page_on_level()
#
SET @save_limit= @@GLOBAL.innodb_limit_optimistic_insert_debug;
SET GLOBAL innodb_limit_optimistic_insert_debug=2;
CREATE TABLE t1 (c CHAR(1) UNIQUE) ENGINE=InnoDB;
ALTER TABLE t1 ADD c2 INT NOT NULL DEFAULT 0 FIRST;
INSERT INTO t1 (c) VALUES ('x'),('d'),('r'),('f'),('y'),('u'),('m'),('d');
ERROR 23000: Duplicate entry 'd' for key 'c'
SET GLOBAL innodb_limit_optimistic_insert_debug=@save_limit;
SELECT * FROM t1;
c2	c
DROP TABLE t1;
#
# MDEV-22867 Assertion instant.n_core_fields == n_core_fields
# in dict_index_t::instant_add_field
#
CREATE TABLE t1 (a INT PRIMARY KEY, b INT UNIQUE) ENGINE=InnoDB;
INSERT INTO t1 SET a=1;
connect  prevent_purge,localhost,root,,;
START TRANSACTION WITH CONSISTENT SNAPSHOT;
connection default;
ALTER TABLE t1 ADD COLUMN c INT;
DELETE FROM t1;
connect  con2,localhost,root,,test;
ALTER TABLE t1 DROP b, ADD INDEX(c), ALGORITHM=NOCOPY;
ERROR 0A000: ALGORITHM=NOCOPY is not supported for this operation. Try ALGORITHM=INPLACE
SET DEBUG_SYNC='innodb_inplace_alter_table_enter SIGNAL ddl WAIT_FOR emptied';
ALTER TABLE t1 DROP b;
connection default;
SET DEBUG_SYNC='now WAIT_FOR ddl';
BEGIN;
INSERT INTO t1 SET a=1;
connection prevent_purge;
COMMIT;
disconnect prevent_purge;
connection default;
ROLLBACK;
SELECT * FROM t1;
a	b	c
SET DEBUG_SYNC='now SIGNAL emptied';
connection con2;
disconnect con2;
connection default;
ALTER TABLE t1 DROP c;
INSERT INTO t1 VALUES (2),(3),(4);
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
DROP TABLE t1;
SET DEBUG_SYNC=RESET;
SET GLOBAL innodb_purge_rseg_truncate_frequency = @save_frequency;