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#
# Bug#22469130: FOREIGN KEY ON DELETE CASCADE NOT ALLOWED
# WHEN A VIRTUAL INDEX EXISTS.
# Add the VIRTUAL INDEX contains fk constraINT column
# using INPLACE alter operatiON
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY) engine=innodb;
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT NOT NULL,
fld3 INT AS (fld2) VIRTUAL, KEY(fld1),
FOREIGN KEY(fld1) REFERENCES t1(fld1) ON UPDATE CASCADE) engine=innodb;
CREATE TABLE u1(a INT, KEY(a)) ENGINE=InnoDB;
CREATE TABLE u2(b INT, vb INT GENERATED ALWAYS AS(b) VIRTUAL, KEY(vb),
FOREIGN KEY(b) REFERENCES u1(a)ON DELETE CASCADE)ENGINE=InnoDB;
INSERT INTO u1 SET a=1;
INSERT INTO u2 SET b=1;
INSERT INTO t1(fld1) VALUES(1);
INSERT INTO t2(fld1, fld2) VALUES(1, 2);
# restart
UPDATE t1 SET fld1= 2;
DELETE FROM u1;
SELECT * FROM u2;
b vb
DROP TABLE u2,u1;
SELECT fld3, fld1 FROM t2;
fld3 fld1
2 2
alter TABLE t2 ADD INDEX vk(fld3, fld1), ALGORITHM=INPLACE;
UPDATE t1 SET fld1=3;
SELECT fld3, fld1 FROM t2;
fld3 fld1
2 3
DROP TABLE t2, t1;
# TEMPORARY TABLE NAME and CHILD TABLE NAME are same
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY) engine=innodb;
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL,
KEY(fld2),
FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE) engine=innodb;
INSERT INTO t1 VALUES(1), (2);
INSERT INTO t2 VALUES(1, DEFAULT), (2, default);
# restart
CREATE TEMPORARY TABLE t2 (fld1 INT NOT NULL)ENGINE=INNODB;
Warnings:
Note 1050 Table 't2' already exists
UPDATE t1 SET fld1= 3 WHERE fld1= 2;
connect con1,localhost,root,,test;
SELECT fld2 FROM t2;
fld2
1
3
CHECK TABLE t2;
Table Op Msg_type Msg_text
test.t2 check status OK
connection default;
disconnect con1;
DROP TABLE t2;
DROP TABLE t2, t1;
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