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--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;
--sorted_result
SELECT f.FOR_NAME, f.REF_NAME, f.N_COLS, f.TYPE, c.FOR_COL_NAME, c.REF_COL_NAME, c.POS
FROM INFORMATION_SCHEMA.INNODB_FOREIGN_COLS c
INNER JOIN INFORMATION_SCHEMA.INNODB_FOREIGN f
ON c.ID=f.ID
WHERE FOR_NAME LIKE 'test/t%';
DROP TABLE t3;
DROP TABLE t2;
DROP TABLE t1;
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