-- source include/have_innodb.inc

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

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

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);

--echo
--echo # Test renaming the column in the referenced table.
--echo

--enable_info
ALTER TABLE t1 CHANGE a e INT;

--echo # Ensure that online column rename works.

ALTER TABLE t1 CHANGE b c INT;

--echo
--echo # Test renaming the column in the referencing table
--echo

ALTER TABLE t2 CHANGE a z INT;

--echo # Ensure that online column rename works.

ALTER TABLE t2 CHANGE b c INT;

--echo
--echo # Test with self-referential constraints
--echo

ALTER TABLE t3 CHANGE a f INT;

ALTER TABLE t3 CHANGE b g INT;

--echo # Ensure that online column rename works.

ALTER TABLE t3 CHANGE c d INT;

--echo
--echo # Cleanup.
--echo

--disable_info
SHOW CREATE TABLE t1;
SHOW CREATE TABLE t2;
SHOW CREATE TABLE t3;

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%';

DROP TABLE t3;
DROP TABLE t2;
DROP TABLE t1;