--source include/have_innodb.inc
CREATE TABLE t1 (a INT)ENGINE=InnoDB;
INSERT INTO t1 VALUES(1);

--enable_info
PREPARE stmt FROM 'ALTER TABLE t1 ADD KEY idx(a)';
PREPARE stmt1 FROM 'ALTER TABLE t1 DROP KEY idx';
DELIMITER |;
CREATE OR REPLACE PROCEDURE p1()
BEGIN
  ALTER TABLE t1 ADD KEY idx2(a);
END|

CREATE OR REPLACE PROCEDURE p2()
BEGIN
  ALTER TABLE t1 DROP KEY idx2;
END|
DELIMITER ;|

EXECUTE stmt;
EXECUTE stmt1;
call p1();
call p2();

DROP TABLE t1;
DROP PROCEDURE p1;
DROP PROCEDURE p2;

SET @save_allowed= @@GLOBAL.innodb_instant_alter_column_allowed;
SET GLOBAL innodb_instant_alter_column_allowed=never;

CREATE TABLE t1(id INT PRIMARY KEY,
	        col1 INT UNSIGNED NOT NULL UNIQUE)ENGINE=InnoDB;
INSERT INTO t1 VALUES(1,1),(2,2),(3,3);
--error ER_ALTER_OPERATION_NOT_SUPPORTED_REASON
ALTER TABLE t1 DROP COLUMN col1, ALGORITHM=INSTANT;
--error ER_ALTER_OPERATION_NOT_SUPPORTED_REASON
ALTER TABLE t1 DROP COLUMN col1, ALGORITHM=NOCOPY;
ALTER TABLE t1 DROP COLUMN col1, ALGORITHM=DEFAULT;
ALTER TABLE t1 DROP PRIMARY KEY, ALGORITHM=DEFAULT;
DROP TABLE t1;
--disable_info
SET GLOBAL innodb_instant_alter_column_allowed=@save_allowed;