#
# 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).

DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;
DROP TABLE IF EXISTS t3;
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 c INT;
ERROR HY000: Error on rename of '#sql-temporary' to './test/t1' (errno: 150)
# Ensure that online column rename works.
ALTER TABLE t1 CHANGE b c INT;
affected rows: 3
info: Records: 3  Duplicates: 0  Warnings: 0

# Test renaming the column in the referencing table

ALTER TABLE t2 CHANGE a c INT;
ERROR HY000: Error on rename of '#sql-temporary' to './test/t2' (errno: 150)
# Ensure that online column rename works.
ALTER TABLE t2 CHANGE b c INT;
affected rows: 3
info: Records: 3  Duplicates: 0  Warnings: 0

# Test with self-referential constraints

ALTER TABLE t3 CHANGE a d INT;
ERROR HY000: Error on rename of '#sql-temporary' to './test/t3' (errno: 150)
ALTER TABLE t3 CHANGE b d INT;
ERROR HY000: Error on rename of '#sql-temporary' to './test/t3' (errno: 150)
# Ensure that online column rename works.
ALTER TABLE t3 CHANGE c d INT;
affected rows: 3
info: Records: 3  Duplicates: 0  Warnings: 0

# Cleanup.

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