#
# Bug#21704: Renaming column does not update FK definition.
#

# Test that it's not possible to rename columns participating in a
# foreign key (either in the referencing or referenced table).

CREATE TABLE t1 (a INT PRIMARY KEY, b INT) ROW_FORMAT=COMPACT ENGINE=INNODB;
CREATE TABLE t2 (a INT PRIMARY KEY, b INT,
CONSTRAINT fk1 FOREIGN KEY (a) REFERENCES t1(a))
ROW_FORMAT=COMPACT ENGINE=INNODB;
CREATE TABLE t3 (a INT PRIMARY KEY, b INT, KEY(b), C INT,
CONSTRAINT fk2 FOREIGN KEY (b) REFERENCES t3 (a))
ROW_FORMAT=COMPACT ENGINE=INNODB;
INSERT INTO t1 VALUES (1,1),(2,2),(3,3);
INSERT INTO t2 VALUES (1,1),(2,2),(3,3);
INSERT INTO t3 VALUES (1,1,1),(2,2,2),(3,3,3);

# Test renaming the column in the referenced table.

ALTER TABLE t1 CHANGE a e INT;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
# Ensure that online column rename works.
ALTER TABLE t1 CHANGE b c INT;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0

# Test renaming the column in the referencing table

ALTER TABLE t2 CHANGE a z INT;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
# Ensure that online column rename works.
ALTER TABLE t2 CHANGE b c INT;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0

# Test with self-referential constraints

ALTER TABLE t3 CHANGE a f INT;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
ALTER TABLE t3 CHANGE b g INT;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0
# Ensure that online column rename works.
ALTER TABLE t3 CHANGE c d INT;
affected rows: 0
info: Records: 0  Duplicates: 0  Warnings: 0

# Cleanup.

SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `e` int(11) NOT NULL DEFAULT '0',
  `c` int(11) DEFAULT NULL,
  PRIMARY KEY (`e`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=COMPACT
SHOW CREATE TABLE t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `z` int(11) NOT NULL DEFAULT '0',
  `c` int(11) DEFAULT NULL,
  PRIMARY KEY (`z`),
  CONSTRAINT `fk1` FOREIGN KEY (`z`) REFERENCES `t1` (`e`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=COMPACT
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `f` int(11) NOT NULL DEFAULT '0',
  `g` int(11) DEFAULT NULL,
  `d` int(11) DEFAULT NULL,
  PRIMARY KEY (`f`),
  KEY `b` (`g`),
  CONSTRAINT `fk2` FOREIGN KEY (`g`) REFERENCES `t3` (`f`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=COMPACT
SELECT f.*, c.*
FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS c
INNER JOIN INFORMATION_SCHEMA.INNODB_SYS_FOREIGN f
ON c.ID=f.ID
WHERE FOR_NAME LIKE 'test/t%';
ID	FOR_NAME	REF_NAME	N_COLS	TYPE	ID	FOR_COL_NAME	REF_COL_NAME	POS
test/fk1	test/t2	test/t1	1	0	test/fk1	z	e	0
test/fk2	test/t3	test/t3	1	0	test/fk2	g	f	0
DROP TABLE t3;
DROP TABLE t2;
DROP TABLE t1;
