Add recovery&rollback tests for instant DROP COLUMN

mysql-test/suite/innodb/r/instant_alter_rollback.result

 FLUSH TABLES;
 #
 # MDEV-11369: Instant ADD COLUMN for InnoDB
+# MDEV-15562: Instant DROP COLUMN or changing the order of columns
 #
 connect to_be_killed, localhost, root;
+SET @old_instant=
+(SELECT variable_value FROM information_schema.global_status
+WHERE variable_name = 'innodb_instant_alter_column');
 CREATE TABLE empty (id INT PRIMARY KEY, c2 INT UNIQUE) ENGINE=InnoDB;
 CREATE TABLE once LIKE empty;
 CREATE TABLE twice LIKE empty;
+CREATE TABLE thrice LIKE empty;
 INSERT INTO once SET id=1,c2=1;
 INSERT INTO twice SET id=1,c2=1;
+INSERT INTO thrice SET id=1,c2=1;
 ALTER TABLE empty ADD COLUMN (d1 INT DEFAULT 15);
 ALTER TABLE once ADD COLUMN (d1 INT DEFAULT 20);
 ALTER TABLE twice ADD COLUMN (d1 INT DEFAULT 20);
+ALTER TABLE thrice ADD COLUMN (d1 INT DEFAULT 20);
 ALTER TABLE twice ADD COLUMN
 (d2 INT NOT NULL DEFAULT 10,
 d3 VARCHAR(15) NOT NULL DEFAULT 'var och en char');
+ALTER TABLE thrice ADD COLUMN
+(d2 INT NOT NULL DEFAULT 10,
+d3 TEXT NOT NULL DEFAULT 'con');
+ALTER TABLE thrice DROP c2, DROP d3, CHANGE d2 d3 INT NOT NULL FIRST;
+SELECT variable_value-@old_instant instants
+FROM information_schema.global_status
+WHERE variable_name = 'innodb_instant_alter_column';
+instants
+7
 BEGIN;
 INSERT INTO empty set id=0,c2=42;
 UPDATE once set c2=c2+1;
 UPDATE twice set c2=c2+1;
+UPDATE thrice set d3=d3+1;
 INSERT INTO twice SET id=2,c2=0,d3='';
+INSERT INTO thrice SET id=2,d3=0;
+DELETE FROM empty;
+DELETE FROM once;
+DELETE FROM twice;
+DELETE FROM thrice;
 connection default;
 SET GLOBAL innodb_flush_log_at_trx_commit=1;
 CREATE TABLE foo(a INT PRIMARY KEY) ENGINE=InnoDB;
@@ -37,4 +59,7 @@ id	c2	d1
 SELECT * FROM twice;
 id	c2	d1	d2	d3
 1	1	20	10	var och en char
-DROP TABLE empty, once, twice;
+SELECT * FROM thrice;
+d3	id	d1
+10	1	20
+DROP TABLE empty, once, twice, thrice;

mysql-test/suite/innodb/t/instant_alter_rollback.test

@@ -8,28 +8,49 @@ FLUSH TABLES;
 
 --echo #
 --echo # MDEV-11369: Instant ADD COLUMN for InnoDB
+--echo # MDEV-15562: Instant DROP COLUMN or changing the order of columns
 --echo #
 
 connect to_be_killed, localhost, root;
 
+SET @old_instant=
+(SELECT variable_value FROM information_schema.global_status
+WHERE variable_name = 'innodb_instant_alter_column');
 CREATE TABLE empty (id INT PRIMARY KEY, c2 INT UNIQUE) ENGINE=InnoDB;
 CREATE TABLE once LIKE empty;
 CREATE TABLE twice LIKE empty;
+CREATE TABLE thrice LIKE empty;
 INSERT INTO once SET id=1,c2=1;
 INSERT INTO twice SET id=1,c2=1;
+INSERT INTO thrice SET id=1,c2=1;
 ALTER TABLE empty ADD COLUMN (d1 INT DEFAULT 15);
 ALTER TABLE once ADD COLUMN (d1 INT DEFAULT 20);
 ALTER TABLE twice ADD COLUMN (d1 INT DEFAULT 20);
+ALTER TABLE thrice ADD COLUMN (d1 INT DEFAULT 20);
 ALTER TABLE twice ADD COLUMN
 (d2 INT NOT NULL DEFAULT 10,
  d3 VARCHAR(15) NOT NULL DEFAULT 'var och en char');
+ALTER TABLE thrice ADD COLUMN
+(d2 INT NOT NULL DEFAULT 10,
+ d3 TEXT NOT NULL DEFAULT 'con');
+ALTER TABLE thrice DROP c2, DROP d3, CHANGE d2 d3 INT NOT NULL FIRST;
+
+SELECT variable_value-@old_instant instants
+FROM information_schema.global_status
+WHERE variable_name = 'innodb_instant_alter_column';
 
 BEGIN;
 
 INSERT INTO empty set id=0,c2=42;
 UPDATE once set c2=c2+1;
 UPDATE twice set c2=c2+1;
+UPDATE thrice set d3=d3+1;
 INSERT INTO twice SET id=2,c2=0,d3='';
+INSERT INTO thrice SET id=2,d3=0;
+DELETE FROM empty;
+DELETE FROM once;
+DELETE FROM twice;
+DELETE FROM thrice;
 
 connection default;
 SET GLOBAL innodb_flush_log_at_trx_commit=1;
@@ -48,4 +69,5 @@ SET GLOBAL innodb_purge_rseg_truncate_frequency=@saved_frequency;
 SELECT * FROM empty;
 SELECT * FROM once;
 SELECT * FROM twice;
-DROP TABLE empty, once, twice;
+SELECT * FROM thrice;
+DROP TABLE empty, once, twice, thrice;