--source include/innodb_page_size.inc
--source include/test_db_charset_latin1.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);
SET innodb_strict_mode = OFF;
--disable_query_log
call mtr.add_suppression("\\[Warning\\] InnoDB: Cannot add .* in table `test`\\.`t` because after adding it, the row size");
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;

--echo #
--echo # MDEV-21787 Alter table failure tries to access uninitialized column
--echo #
CREATE TABLE t1(f1 INT PRIMARY KEY, f2 TEXT GENERATED ALWAYS AS (SUBSTR(f4, 1, 400)), f3 VARCHAR(500), f4 TEXT)ENGINE=InnoDB ROW_FORMAT=Compact;
ALTER TABLE t1 ADD UNIQUE KEY (f2(9));
let $error_code = 0;
let $innodb_page_size = `SELECT @@INNODB_PAGE_SIZE`;
if ($innodb_page_size == 4k) {
 let $error_code= ER_TOO_BIG_ROWSIZE;
}
--error $error_code
ALTER TABLE t1 ADD COLUMN f5 TEXT, ALGORITHM=INPLACE;
DROP TABLE t1;

--source include/test_db_charset_restore.inc
