CREATE TABLE t (c1 INT PRIMARY KEY, c2 INT NOT NULL, c3 INT) ENGINE=InnoDB;
INSERT INTO t VALUES (1,2,3),(4,5,6),(7,8,9);
ALTER TABLE t CHANGE c1 c1 INT NULL FIRST, ALGORITHM=INPLACE;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
ALTER TABLE t MODIFY c3 INT NOT NULL, ALGORITHM=INPLACE;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
ALTER TABLE t CHANGE c2 c2 INT, CHANGE c2 c2 INT NOT NULL;
ERROR 42S22: Unknown column 'c2' in 't'
ALTER TABLE t MODIFY c2 INT, MODIFY c2 INT NOT NULL;
ERROR 42S22: Unknown column 'c2' in 't'
ALTER TABLE t MODIFY c2 INT UNSIGNED, MODIFY c2 INT;
ERROR 42S22: Unknown column 'c2' in 't'
ALTER TABLE t MODIFY c2 CHAR(1) NOT NULL, MODIFY c2 INT NOT NULL;
ERROR 42S22: Unknown column 'c2' in 't'
ALTER TABLE t CHANGE c2 c2 INT NOT NULL;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
ALTER TABLE t MODIFY c2 INT NOT NULL;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
connect  con1,localhost,root,,;
UPDATE t SET c2=NULL;
ERROR 23000: Column 'c2' cannot be null
SELECT * FROM t;
c1	c2	c3
1	2	3
4	5	6
7	8	9
connection default;
ALTER TABLE t MODIFY c2 INT, ALGORITHM=INPLACE;
connection con1;
BEGIN;
UPDATE t SET c2=NULL;
SELECT * FROM t;
c1	c2	c3
1	NULL	3
4	NULL	6
7	NULL	9
ROLLBACK;
SELECT * FROM t;
c1	c2	c3
1	2	3
4	5	6
7	8	9
disconnect con1;
connection default;
ALTER TABLE t MODIFY c2 INT NULL, ALGORITHM=INPLACE;
SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES
WHERE NAME='test/t';
TABLE_ID	NAME	FLAG	N_COLS	SPACE	ROW_FORMAT	ZIP_PAGE_SIZE	SPACE_TYPE
#	test/t	33	6	#	Dynamic	0	Single
DROP TABLE t;
CREATE TABLE t1(c1 INT) ENGINE=InnoDB;
ALTER TABLE t1 ADD CONSTRAINT UNIQUE KEY i1(c1);
ALTER TABLE t1 CHANGE c1 c1 INT NOT NULL,ADD KEY(c1);
DROP TABLE t1;
#
# MDEV-18732 InnoDB: ALTER IGNORE returns error for NULL
#
CREATE TABLE t1(c INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (NULL);
ALTER IGNORE TABLE t1 MODIFY c INT NOT NULL;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 1
Warnings:
Warning	1265	Data truncated for column 'c' at row 1
INSERT INTO t1 VALUES (NULL);
ERROR 23000: Column 'c' cannot be null
SELECT * FROM t1;
c
0
DROP TABLE t1;
CREATE TABLE t1(c INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (NULL),(1),(1);
ALTER IGNORE TABLE t1 ADD UNIQUE(c);
affected rows: 3
info: Records: 3  Duplicates: 1  Warnings: 0
ALTER IGNORE TABLE t1 ADD PRIMARY KEY(c);
affected rows: 2
info: Records: 2  Duplicates: 0  Warnings: 1
Warnings:
Warning	1265	Data truncated for column 'c' at row 1
SELECT * FROM t1;
c
0
1
DROP TABLE t1;
CREATE TABLE t1(c INT, g INT AS (c) PERSISTENT) ENGINE=InnoDB;
CREATE TABLE t2(c INT, v INT AS (c) VIRTUAL) ENGINE=InnoDB;
CREATE TABLE t3(c INT, v INT AS (c) VIRTUAL, INDEX(v)) ENGINE=InnoDB;
INSERT INTO t1 SET c=NULL;
INSERT INTO t2 SET c=NULL;
INSERT INTO t3 SET c=NULL;
SET @old_sql_mode = @@sql_mode;
SET sql_mode = '';
ALTER TABLE t1 MODIFY c INT NOT NULL;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 1
Warnings:
Warning	1265	Data truncated for column 'c' at row 1
ALTER TABLE t2 MODIFY c INT NOT NULL;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 1
Warnings:
Warning	1265	Data truncated for column 'c' at row 1
ALTER TABLE t3 MODIFY c INT NOT NULL;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 1
Warnings:
Warning	1265	Data truncated for column 'c' at row 1
SET sql_mode = @old_sql_mode;
SELECT * FROM t1;
c	g
0	0
SELECT * FROM t2;
c	v
0	0
SELECT * FROM t3;
c	v
0	0
SELECT v FROM t3 FORCE INDEX(v);
v
0
CHECK TABLE t1,t2,t3;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
test.t2	check	status	OK
test.t3	check	status	OK
DROP TABLE t1,t2,t3;
CREATE TABLE t1(c INT, g INT AS (c) PERSISTENT) ENGINE=InnoDB;
CREATE TABLE t2(c INT, v INT AS (c) VIRTUAL) ENGINE=InnoDB;
CREATE TABLE t3(c INT, v INT AS (c) VIRTUAL, INDEX(v)) ENGINE=InnoDB;
INSERT INTO t1 SET c=NULL;
INSERT INTO t2 SET c=NULL;
INSERT INTO t3 SET c=NULL;
ALTER IGNORE TABLE t1 MODIFY c INT NOT NULL;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 1
Warnings:
Warning	1265	Data truncated for column 'c' at row 1
ALTER IGNORE TABLE t2 MODIFY c INT NOT NULL;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 1
Warnings:
Warning	1265	Data truncated for column 'c' at row 1
ALTER IGNORE TABLE t3 MODIFY c INT NOT NULL;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 1
Warnings:
Warning	1265	Data truncated for column 'c' at row 1
SELECT * FROM t1;
c	g
0	0
SELECT * FROM t2;
c	v
0	0
SELECT * FROM t3;
c	v
0	0
SELECT v FROM t3 FORCE INDEX(v);
v
0
CHECK TABLE t1,t2,t3;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
test.t2	check	status	OK
test.t3	check	status	OK
DROP TABLE t1,t2,t3;
CREATE TABLE t1(c INT, g INT AS (c) PERSISTENT) ENGINE=InnoDB;
CREATE TABLE t2(c INT, v INT AS (c) VIRTUAL) ENGINE=InnoDB;
CREATE TABLE t3(c INT, v INT AS (c) VIRTUAL, INDEX(v)) ENGINE=InnoDB;
INSERT INTO t1 SET c=NULL;
INSERT INTO t2 SET c=NULL;
INSERT INTO t3 SET c=NULL;
ALTER TABLE t1 MODIFY c INT NOT NULL;
ERROR 01000: Data truncated for column 'c' at row 1
ALTER TABLE t2 MODIFY c INT NOT NULL;
ERROR 01000: Data truncated for column 'c' at row 1
ALTER TABLE t3 MODIFY c INT NOT NULL;
ERROR 01000: Data truncated for column 'c' at row 1
UPDATE t1 SET c=0;
UPDATE t2 SET c=0;
UPDATE t3 SET c=0;
ALTER TABLE t1 MODIFY c INT NOT NULL;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
ALTER TABLE t2 MODIFY c INT NOT NULL;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
ALTER TABLE t3 MODIFY c INT NOT NULL;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
SELECT * FROM t1;
c	g
0	0
SELECT * FROM t2;
c	v
0	0
SELECT * FROM t3;
c	v
0	0
DROP TABLE t1,t2,t3;