fk_col_alter.result

#
#  MDEV-31086 MODIFY COLUMN can break FK constraints, and
#        lead to unrestorable dumps
#
CREATE TABLE t1(
id SERIAL,
msg VARCHAR(100) CHARACTER SET utf8mb3,
KEY(msg))ENGINE=InnoDB;
CREATE TABLE t2(
id SERIAL,
msg varchar(100) CHARACTER SET utf8mb4,
CONSTRAINT fk_t1 FOREIGN KEY (msg) REFERENCES t1 (msg))ENGINE=InnoDB;
ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint is incorrectly formed")
CREATE TABLE t2(
id SERIAL,
msg varchar(100) CHARACTER SET utf8mb3,
msg_1 varchar(100) CHARACTER SET utf8mb3,
INDEX (msg_1),
INDEX (msg),
CONSTRAINT fk_t1 FOREIGN KEY (msg) REFERENCES t1 (msg)
ON DELETE CASCADE)ENGINE=InnoDB;
SET FOREIGN_KEY_CHECKS=1;
ALTER TABLE t2 MODIFY COLUMN msg VARCHAR(200) character set utf8mb3, ALGORITHM=COPY;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'fk_t1'
ALTER TABLE t2 MODIFY COLUMN msg VARCHAR(200) character set utf8mb3, ALGORITHM=INPLACE;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'test/fk_t1'
SET FOREIGN_KEY_CHECKS=0;
ALTER TABLE t2 MODIFY COLUMN msg VARCHAR(200) character set utf8mb3, ALGORITHM=COPY;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'fk_t1'
ALTER TABLE t2 MODIFY COLUMN msg VARCHAR(400) character set utf8mb3, ALGORITHM=INPLACE;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'test/fk_t1'
SET FOREIGN_KEY_CHECKS=1;
ALTER TABLE t2 MODIFY COLUMN msg VARCHAR(100) CHARACTER SET utf8mb4, ALGORITHM=COPY;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'fk_t1'
ALTER TABLE t2 MODIFY COLUMN msg VARCHAR(100) CHARACTER SET utf8mb4, ALGORITHM=INPLACE;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'test/fk_t1'
SET FOREIGN_KEY_CHECKS=0;
ALTER TABLE t2 MODIFY COLUMN msg VARCHAR(100) CHARACTER SET utf8mb4,ALGORITHM=COPY;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'fk_t1'
ALTER TABLE t2 MODIFY COLUMN msg VARCHAR(100) CHARACTER SET utf8mb4,ALGORITHM=INPLACE;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'test/fk_t1'
SET FOREIGN_KEY_CHECKS=1;
ALTER TABLE t2 ADD CONSTRAINT FOREIGN KEY(msg_1) REFERENCES t1(msg),MODIFY COLUMN msg_1 VARCHAR(100) CHARACTER SET utf8mb4, ALGORITHM=COPY;
ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint is incorrectly formed")
ALTER TABLE t2 ADD CONSTRAINT FOREIGN KEY(msg_1) REFERENCES t1(msg),MODIFY COLUMN msg_1 VARCHAR(100) CHARACTER SET utf8mb4, ALGORITHM=INPLACE;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: Adding foreign keys needs foreign_key_checks=OFF. Try ALGORITHM=COPY
SET FOREIGN_KEY_CHECKS=0;
ALTER TABLE t2 ADD CONSTRAINT FOREIGN KEY(msg_1) REFERENCES t1(msg),MODIFY COLUMN msg_1 VARCHAR(100) CHARACTER SET utf8mb4, ALGORITHM=COPY;
ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint is incorrectly formed")
ALTER TABLE t2 ADD CONSTRAINT FOREIGN KEY(msg_1) REFERENCES t1(msg),MODIFY COLUMN msg_1 VARCHAR(100) CHARACTER SET utf8mb4, ALGORITHM=INPLACE;
ERROR HY000: Cannot change column 'msg_1': used in a foreign key constraint 'test/t2_ibfk_0'
ALTER TABLE t2 ADD CONSTRAINT FOREIGN KEY(msg_1) REFERENCES t1(msg),MODIFY COLUMN msg_1 VARCHAR(200) CHARACTER SET utf8mb3, ALGORITHM=INPLACE;
ERROR HY000: Cannot change column 'msg_1': used in a foreign key constraint 'test/t2_ibfk_0'
SET FOREIGN_KEY_CHECKS=1;
ALTER TABLE t1 MODIFY msg VARCHAR(200) CHARSET utf8mb3, ALGORITHM=COPY;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'fk_t1' of table 'test.t2'
ALTER TABLE t1 MODIFY msg VARCHAR(200) CHARSET utf8mb3, ALGORITHM=INPLACE;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'test/fk_t1' of table 'test/t2'
ALTER TABLE t1 MODIFY msg VARCHAR(200) CHARSET utf8mb4, ALGORITHM=COPY;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'fk_t1' of table 'test.t2'
ALTER TABLE t1 MODIFY msg VARCHAR(200) CHARSET utf8mb4, ALGORITHM=INPLACE;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'test/fk_t1' of table 'test/t2'
SET FOREIGN_KEY_CHECKS=0;
ALTER TABLE t1 MODIFY msg VARCHAR(200) CHARSET utf8mb3, ALGORITHM=COPY;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'fk_t1' of table 'test.t2'
ALTER TABLE t1 MODIFY msg VARCHAR(400) CHARSET utf8mb3, ALGORITHM=INPLACE;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'test/fk_t1' of table 'test/t2'
ALTER TABLE t1 MODIFY msg VARCHAR(200) CHARSET utf8mb4, ALGORITHM=COPY;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'fk_t1' of table 'test.t2'
ALTER TABLE t1 MODIFY msg VARCHAR(200) CHARSET utf8mb4, ALGORITHM=INPLACE;
ERROR HY000: Cannot change column 'msg': used in a foreign key constraint 'test/fk_t1' of table 'test/t2'
SET FOREIGN_KEY_CHECKS=0;
ALTER TABLE t2 DROP FOREIGN KEY fk_t1, MODIFY msg VARCHAR(200) CHARSET utf8mb4, ALGORITHM=COPY;
ALTER TABLE t1 MODIFY msg VARCHAR(200) CHARSET utf8mb4, ALGORITHM=COPY;
ALTER TABLE t2 ADD CONSTRAINT FOREIGN KEY (msg) REFERENCES t1(msg), aLGORITHM=INPLACE;
SET FOREIGN_KEY_CHECKS=1;
DROP TABLE t2, t1;
#
# MDEV-31869 Server aborts when table does drop column
#
CREATE TABLE t (a VARCHAR(40), b INT, C INT) ENGINE=InnoDB;
ALTER TABLE t MODIFY a VARCHAR(50), DROP b;
DROP TABLE t;
# End of 10.4 tests