--source include/innodb_page_size.inc

SET @old_instant=
(SELECT variable_value FROM information_schema.global_status
WHERE variable_name = 'innodb_instant_alter_column');

CREATE TABLE t(a INT PRIMARY KEY, b INT, c INT, d INT, e INT)
ENGINE=InnoDB;
INSERT INTO t VALUES(1,2,3,4,5);
--disable_query_log
let $n=253;
while ($n) {
dec $n;
ALTER TABLE t DROP b, DROP c, DROP d, DROP e,
ADD COLUMN b INT FIRST, ADD COLUMN c INT, ADD COLUMN d INT AFTER b,
ADD COLUMN e INT AFTER c, ALGORITHM=INSTANT;
}
--enable_query_log
SELECT * FROM t;
--error ER_ALTER_OPERATION_NOT_SUPPORTED
ALTER TABLE t DROP b, DROP c, DROP d, DROP e,
ADD COLUMN b INT, ALGORITHM=INSTANT;
ALTER TABLE t CHANGE COLUMN b beta INT AFTER a, ALGORITHM=INSTANT;
ALTER TABLE t DROP e, DROP c, DROP d, ALGORITHM=INSTANT;
SELECT * FROM t;
ALTER TABLE t DROP COLUMN beta, ALGORITHM=INSTANT;
--error ER_ALTER_OPERATION_NOT_SUPPORTED
ALTER TABLE t ADD COLUMN b INT NOT NULL, ALGORITHM=INSTANT;

SELECT variable_value-@old_instant instants
FROM information_schema.global_status
WHERE variable_name = 'innodb_instant_alter_column';

ALTER TABLE t ADD COLUMN b INT NOT NULL;

SELECT variable_value-@old_instant instants
FROM information_schema.global_status
WHERE variable_name = 'innodb_instant_alter_column';

SELECT * FROM t;
ALTER TABLE t ADD COLUMN (c CHAR(255) NOT NULL, d BIGINT NOT NULL),
ALGORITHM=INSTANT;

--disable_query_log
let $n=253;
while ($n) {
dec $n;
ALTER TABLE t DROP b, DROP c, DROP d,
ADD COLUMN (b INT NOT NULL, c CHAR(255) NOT NULL, d BIGINT NOT NULL);
}
--enable_query_log

UPDATE t SET b=b+1,d=d+1,c='foo';
SELECT * FROM t;

SELECT variable_value-@old_instant instants
FROM information_schema.global_status
WHERE variable_name = 'innodb_instant_alter_column';

DROP TABLE t;