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#
# 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 NOT NULL,
`c` int DEFAULT NULL,
PRIMARY KEY (`e`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=COMPACT
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`z` int NOT NULL,
`c` int DEFAULT NULL,
PRIMARY KEY (`z`),
CONSTRAINT `fk1` FOREIGN KEY (`z`) REFERENCES `t1` (`e`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=COMPACT
SHOW CREATE TABLE t3;
Table Create Table
t3 CREATE TABLE `t3` (
`f` int NOT NULL,
`g` int DEFAULT NULL,
`d` int DEFAULT NULL,
PRIMARY KEY (`f`),
KEY `b` (`g`),
CONSTRAINT `fk2` FOREIGN KEY (`g`) REFERENCES `t3` (`f`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=COMPACT
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%';
FOR_NAME REF_NAME N_COLS TYPE FOR_COL_NAME REF_COL_NAME POS
test/t2 test/t1 1 48 z e 1
test/t3 test/t3 1 48 g f 1
DROP TABLE t3;
DROP TABLE t2;
DROP TABLE t1;
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