CREATE TABLE `t` (
`a` BLOB,
`b` BLOB,
`c` BLOB GENERATED ALWAYS AS (CONCAT(a,b)) VIRTUAL,
`h` VARCHAR(10) DEFAULT NULL,
`i` int
) ENGINE=InnoDB;
INSERT INTO t VALUES (REPEAT('g', 16000), REPEAT('x', 16000), DEFAULT, "kk", 1);
INSERT INTO t VALUES (REPEAT('a', 16000), REPEAT('b', 16000), DEFAULT, "mm", 2);
CREATE INDEX idx ON t(c(100));
SET global debug="+d,ib_purge_virtual_index_callback";
UPDATE t SET a = REPEAT('m', 16000) WHERE a like "aaa%";
select sleep(3);
sleep(3)
0
SET global debug="-d,ib_purge_virtual_index_callback";
DROP TABLE t;
CREATE TABLE t (
a TINYBLOB,
b TINYBLOB,
c TINYBLOB GENERATED ALWAYS AS (CONCAT(a,b)) VIRTUAL,
h VARCHAR(10) DEFAULT NULL,
i INT
) ROW_FORMAT=COMPACT ENGINE=InnoDB;
INSERT INTO t VALUES (REPEAT('g', 100), REPEAT('x', 100), DEFAULT, "kk", 1);
INSERT INTO t VALUES (REPEAT('a', 100), REPEAT('b', 100), DEFAULT, "mm", 2);
CREATE INDEX idx ON t(c(100));
SET global debug="+d,ib_purge_virtual_index_callback";
UPDATE t SET a = REPEAT('m', 100) WHERE a like "aaa%";
select sleep(3);
sleep(3)
0
SET global debug="-d,ib_purge_virtual_index_callback";
DROP TABLE t;
CREATE TABLE t1 (
id INT NOT NULL,
store_id INT NOT NULL,
x INT GENERATED ALWAYS AS (id + store_id)
)
PARTITION BY RANGE (store_id) (
PARTITION p0 VALUES LESS THAN (6),
PARTITION p1 VALUES LESS THAN (11),
PARTITION p2 VALUES LESS THAN (16),
PARTITION p3 VALUES LESS THAN (21)
);
insert into t1 values(1, 2, default);
insert into t1 values(3, 4, default);
insert into t1 values(3, 12, default);
insert into t1 values(4, 18, default);
CREATE INDEX idx ON t1(x);
SET global debug="+d,ib_purge_virtual_index_callback";
UPDATE t1 SET id = 10 WHERE id = 1;
select sleep(3);
sleep(3)
0
SET global debug="-d,ib_purge_virtual_index_callback";
DROP TABLE t1;
CREATE TABLE t1 (a INT, b INT);
INSERT INTO t1(a, b) VALUES (1, 1), (2, 2), (3, 3);
# disable purge
CREATE TABLE t0 (a INT) ENGINE=InnoDB;
BEGIN;
SELECT * FROM t0;
a
DELETE FROM t1 WHERE a = 1;
UPDATE t1 SET a = 4, b = 4 WHERE a = 3;
INSERT INTO t1(a, b) VALUES (5, 5);
SET DEBUG_SYNC= 'inplace_after_index_build SIGNAL uncommitted WAIT_FOR purged';
ALTER TABLE t1 ADD COLUMN c INT GENERATED ALWAYS AS(a+b), ADD INDEX idx (c), ALGORITHM=INPLACE, LOCK=NONE;
ERROR 0A000: LOCK=NONE is not supported. Reason: ADD COLUMN col...VIRTUAL, ADD INDEX(col). Try LOCK=SHARED.
ALTER TABLE t1 ADD COLUMN c INT GENERATED ALWAYS AS(a+b), ADD INDEX idx (c), ALGORITHM=INPLACE, LOCK=SHARED;
SET DEBUG_SYNC= 'now WAIT_FOR uncommitted';
# enable purge
COMMIT;
# wait for purge to process the deleted records.
SET DEBUG_SYNC= 'now SIGNAL purged';
/* connection default */ ALTER TABLE t1 ADD COLUMN c INT GENERATED ALWAYS AS(a+b), ADD INDEX idx (c), ALGORITHM=INPLACE, LOCK=SHARED;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) DEFAULT NULL,
  `b` int(11) DEFAULT NULL,
  `c` int(11) GENERATED ALWAYS AS ((`a` + `b`)) VIRTUAL,
  KEY `idx` (`c`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SELECT * FROM t1;
a	b	c
2	2	4
4	4	8
5	5	10
DROP TABLE t1;
CREATE TABLE t1 (a INT, b INT, c INT GENERATED ALWAYS AS(a+b));
INSERT INTO t1(a, b) VALUES (1, 1), (2, 2), (3, 3), (4, 4);
# disable purge
BEGIN;
SELECT * FROM t0;
a
DELETE FROM t1 WHERE a = 1;
UPDATE t1 SET a = 2, b = 2 WHERE a = 5;
INSERT INTO t1(a, b) VALUES (6, 6);
SET DEBUG_SYNC= 'inplace_after_index_build SIGNAL uncommitted WAIT_FOR purged';
ALTER TABLE t1 ADD INDEX idx (c), ALGORITHM=INPLACE, LOCK=NONE;
SET DEBUG_SYNC= 'now WAIT_FOR uncommitted';
DELETE FROM t1 WHERE a = 3;
UPDATE t1 SET a = 7, b = 7 WHERE a = 4;
INSERT INTO t1(a, b) VALUES (8, 8);
# enable purge
COMMIT;
# wait for purge to process the deleted/updated records.
SET DEBUG_SYNC= 'now SIGNAL purged';
/* connection default */ ALTER TABLE t1 ADD INDEX idx (c), ALGORITHM=INPLACE, LOCK=NONE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) DEFAULT NULL,
  `b` int(11) DEFAULT NULL,
  `c` int(11) GENERATED ALWAYS AS ((`a` + `b`)) VIRTUAL,
  KEY `idx` (`c`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SELECT * FROM t1;
a	b	c
2	2	4
7	7	14
6	6	12
8	8	16
DROP TABLE t0, t1;