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mariadb/mysql-test/suite/gcol/r/innodb_virtual_fk.result
Sergei Golubchik 1cae1af6f9 MDEV-5800 InnoDB support for indexed vcols 
* remove old 5.2+ InnoDB support for virtual columns
  * enable corresponding parts of the innodb-5.7 sources
  * copy corresponding test cases from 5.7
  * copy detailed Alter_inplace_info::HA_ALTER_FLAGS flags from 5.7
     - and more detailed detection of changes in fill_alter_inplace_info()
  * more "innodb compatibility hooks" in sql_class.cc to
     - create/destroy/reset a THD (used by background purge threads)
     - find a prelocked table by name
     - open a table (from a background purge thread)

  * different from 5.7:
    - new service thread "thd_destructor_proxy" to make sure all THDs are
      destroyed at the correct point in time during the server shutdown
    - proper opening/closing of tables for vcol evaluations in
       + FK checks (use already opened prelocked tables)
       + purge threads (open the table, MDLock it, add it to tdc, close
         when not needed)
    - cache open tables in vc_templ
    - avoid unnecessary allocations, reuse table->record[0] and table->s->default_values
    - not needed in 5.7, because it overcalculates:
      + tell the server to calculate vcols for an on-going inline ADD INDEX
      + calculate vcols for correct error messages

  * update other engines (mroonga/tokudb) accordingly
2016-12-12 20:27:42 +01:00

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set default_storage_engine=innodb;
#
# Bug#22469130: FOREIGN KEY ON DELETE CASCADE NOT ALLOWED
# WHEN A VIRTUAL INDEX EXISTS.
# UPDATE CASCADE
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT AS (fld1) VIRTUAL, KEY(fld2),
FOREIGN KEY(fld1) REFERENCES t1(fld1) ON UPDATE CASCADE);
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
2
SELECT * FROM t2;
fld1 fld2
2 2
DROP TABLE t2, t1;
# UPDATE SET NULL
CREATE TABLE t1(fld1 INT NOT NULL, fld2 INT NOT NULL PRIMARY KEY,
KEY(fld1));
CREATE TABLE t2(fld1 INT, fld2 INT AS (fld1) VIRTUAL, KEY(fld2),
FOREIGN KEY(fld1) REFERENCES t1(fld1) ON UPDATE SET NULL);
INSERT INTO t1 VALUES(1, 2);
INSERT INTO t2 VALUES(1, DEFAULT);
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
NULL
SELECT * FROM t2;
fld1 fld2
NULL NULL
DROP TABLE t2, t1;
# DELETE CASCADE
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT, fld2 INT AS (fld1) VIRTUAL, KEY(fld2),
FOREIGN KEY(fld1) REFERENCES t1(fld1) ON DELETE CASCADE);
INSERT INTO t1 VALUES(1);
INSERT INTO t1 VALUES(2);
INSERT INTO t2 VALUES(1, DEFAULT);
INSERT INTO t2 VALUES(2, DEFAULT);
DELETE FROM t1 WHERE fld1= 1;
SELECT fld2 FROM t2;
fld2
2
SELECT * FROM t2;
fld1 fld2
2 2
DROP TABLE t2, t1;
# DELETE SET NULL
CREATE TABLE t1(fld1 INT NOT NULL, fld2 INT NOT NULL PRIMARY KEY, KEY(fld1));
CREATE TABLE t2(fld1 INT, fld2 INT AS (fld1) VIRTUAL, KEY(fld2),
FOREIGN KEY(fld1) REFERENCES t1(fld1) ON DELETE SET NULL);
INSERT INTO t1 VALUES(1, 1);
INSERT INTO t1 VALUES(2, 2);
INSERT INTO t2 VALUES(1, DEFAULT);
INSERT INTO t2 VALUES(2, DEFAULT);
DELETE FROM t1 WHERE fld1= 1;
SELECT fld2 FROM t2;
fld2
NULL
2
SELECT * FROM t2;
fld1 fld2
NULL NULL
2 2
DROP TABLE t2, t1;
# VIRTUAL INDEX CONTAINS FK CONSTRAINT COLUMN
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT, fld3 INT AS (fld2) VIRTUAL,
KEY(fld3, fld1),
FOREIGN KEY(fld1) REFERENCES t1(fld1) ON UPDATE CASCADE);
INSERT INTO t1(fld1) VALUES(1);
INSERT INTO t2(fld1, fld2) VALUES(1, 3);
UPDATE t1 SET fld1= 2;
SELECT fld3, fld1 FROM t2;
fld3 fld1
3 2
SELECT * FROM t2;
fld1 fld2 fld3
2 3 3
DROP TABLE t2, t1;
# Multiple level of VIRTUAL columns.
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT AS (fld1) VIRTUAL,
fld3 INT AS (fld2) VIRTUAL, KEY(fld3), KEY(fld2),
FOREIGN KEY(fld1) REFERENCES t1(fld1) ON UPDATE CASCADE);
INSERT INTO t1(fld1) VALUES(1);
INSERT INTO t2(fld1) VALUES(1);
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
2
SELECT fld3 FROM t2;
fld3
2
SELECT * FROM t2;
fld1 fld2 fld3
2 2 2
DROP TABLE t2, t1;
# Drop the VIRTUAL INDEX using alter copy ALGORITHM
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT AS (fld1) VIRTUAL, KEY vk(fld2),
KEY(fld1), FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1(fld1) VALUES(1);
INSERT INTO t2(fld1) VALUES(1);
UPDATE t1 SET fld1= 2;
SELECT fld2, fld1 FROM t2;
fld2 fld1
2 2
ALTER TABLE t2 DROP INDEX vk, ALGORITHM= COPY;
UPDATE t1 SET fld1= 3;
SELECT fld2, fld1 FROM t2;
fld2 fld1
3 3
DROP TABLE t2, t1;
# Drop the VIRTUAL INDEX using INPLACE alter ALGORITHM
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT AS (fld1) VIRTUAL,
KEY vk(fld2), KEY(fld1), FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1(fld1) VALUES(1);
INSERT INTO t2(fld1) VALUES(1);
UPDATE t1 SET fld1= 2;
SELECT fld2, fld1 FROM t2;
fld2 fld1
2 2
ALTER TABLE t2 DROP INDEX vk, ALGORITHM= COPY;
UPDATE t1 SET fld1= 3;
SELECT fld2, fld1 FROM t2;
fld2 fld1
3 3
DROP TABLE t2, t1;
# Add the VIRTUAL INDEX using COPY alter ALGORITHM
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT AS (fld1) VIRTUAL,
KEY(fld1), FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1(fld1) VALUES(1);
INSERT INTO t2(fld1) VALUES(1);
UPDATE t1 SET fld1= 2;
SELECT fld2, fld1 FROM t2;
fld2 fld1
2 2
ALTER TABLE t2 ADD INDEX vk(fld2), ALGORITHM= COPY;
UPDATE t1 SET fld1= 3;
SELECT fld2, fld1 FROM t2;
fld2 fld1
3 3
DROP TABLE t2, t1;
# Add the VIRTUAL INDEX using INPLACE alter ALGORITHM
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,fld2 INT AS (fld1) VIRTUAL,
KEY(fld1), FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1(fld1) VALUES(1);
INSERT INTO t2(fld1) VALUES(1);
UPDATE t1 SET fld1= 2;
SELECT fld2, fld1 FROM t2;
fld2 fld1
2 2
ALTER TABLE t2 ADD INDEX vk(fld2), ALGORITHM= INPLACE;
UPDATE t1 SET fld1= 3;
SELECT fld2, fld1 FROM t2;
fld2 fld1
3 3
DROP TABLE t2, t1;
# Drop the VIRTUAL INDEX contains fk constraint column
# using alter copy ALGORITHM
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT NOT NULL,
fld3 INT AS (fld2) VIRTUAL, KEY vk(fld3, fld1),
KEY(fld1), FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1(fld1) VALUES(1);
INSERT INTO t2(fld1, fld2) VALUES(1, 2);
UPDATE t1 SET fld1= 2;
SELECT fld3, fld1 FROM t2;
fld3 fld1
2 2
ALTER TABLE t2 DROP INDEX vk, ALGORITHM= COPY;
UPDATE t1 SET fld1= 3;
SELECT fld3, fld1 FROM t2;
fld3 fld1
2 3
DROP TABLE t2, t1;
# Drop the VIRTUAL INDEX which contains fk constraint column
# using INPLACE alter operation
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT NOT NULL,
fld3 INT AS (fld2) VIRTUAL, KEY vk(fld3, fld1),
KEY(fld1), FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1(fld1) VALUES(1);
INSERT INTO t2(fld1, fld2) VALUES(1, 2);
UPDATE t1 SET fld1= 2;
SELECT fld3, fld1 FROM t2;
fld3 fld1
2 2
alter TABLE t2 DROP INDEX vk, ALGORITHM= INPLACE;
UPDATE t1 SET fld1= 3;
SELECT fld3, fld1 FROM t2;
fld3 fld1
2 3
DROP TABLE t2, t1;
# Add the VIRTUAL INDEX contains fk constraint column
# using copy alter operatiON
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
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);
INSERT INTO t1(fld1) VALUES(1);
INSERT INTO t2(fld1, fld2) VALUES(1, 2);
UPDATE t1 SET fld1= 2;
SELECT fld3, fld1 FROM t2;
fld3 fld1
2 2
alter TABLE t2 ADD INDEX vk(fld3, fld1), ALGORITHM= COPY;
UPDATE t1 SET fld1= 3;
SELECT fld3, fld1 FROM t2;
fld3 fld1
2 3
DROP TABLE t2, t1;
# Cascading UPDATEs and DELETEs for the multiple
# fk dependent TABLEs
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT AS (fld1) VIRTUAL,
KEY(fld1), KEY(fld2, fld1),
FOREIGN KEY(fld1) REFERENCES t1(fld1) ON UPDATE CASCADE);
CREATE TABLE t3(fld1 INT NOT NULL, fld2 INT AS (fld1) VIRTUAL,
KEY(fld2, fld1),
FOREIGN KEY(fld1) REFERENCES t2(fld1) ON UPDATE CASCADE);
INSERT INTO t1 VALUES(1), (2);
INSERT INTO t2(fld1) VALUES(1), (2);
INSERT INTO t3(fld1) VALUES(1), (2);
UPDATE t1 SET fld1= 4 WHERE fld1= 1;
SELECT fld2, fld1 FROM t2;
fld2 fld1
2 2
4 4
SELECT fld2, fld1 FROM t3;
fld2 fld1
2 2
4 4
DROP TABLE t3, t2, t1;
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT NOT NULL,
fld3 INT AS (fld2) VIRTUAL, KEY(fld3, fld1), KEY(fld1),
FOREIGN KEY(fld1) REFERENCES t1(fld1) ON UPDATE CASCADE);
CREATE TABLE t3(fld1 INT NOT NULL, fld2 INT NOT NULL,
fld3 INT AS (fld2) VIRTUAL, KEY(fld3, fld1),
FOREIGN KEY(fld1) REFERENCES t2(fld1) ON UPDATE CASCADE);
INSERT INTO t1 VALUES(1), (2);
INSERT INTO t2 VALUES(1, 1, DEFAULT), (2, 2, default);
INSERT INTO t3 VALUES(1, 1, DEFAULT), (2, 2, default);
UPDATE t1 SET fld1= 4 WHERE fld1= 1;
SELECT fld3, fld1 FROM t2;
fld3 fld1
1 4
2 2
SELECT fld3, fld1 FROM t3;
fld3 fld1
1 4
2 2
DROP TABLE t3, t2, t1;
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT AS (fld1) VIRTUAL,
KEY(fld1), KEY(fld2, fld1),
FOREIGN KEY(fld1) REFERENCES t1(fld1) ON DELETE CASCADE);
CREATE TABLE t3(fld1 INT NOT NULL, fld2 INT AS (fld1) VIRTUAL,
KEY(fld2, fld1), FOREIGN KEY(fld1) REFERENCES t2(fld1)
ON DELETE CASCADE);
INSERT INTO t1 VALUES(1), (2);
INSERT INTO t2(fld1) VALUES(1), (2);
INSERT INTO t3(fld1) VALUES(1), (2);
DELETE FROM t1 WHERE fld1= 1;
SELECT fld2, fld1 FROM t2;
fld2 fld1
2 2
SELECT fld2, fld1 FROM t3;
fld2 fld1
2 2
DROP TABLE t3, t2, t1;
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL, fld2 INT NOT NULL,
fld3 INT AS (fld2) VIRTUAL,
KEY(fld3, fld1), KEY(fld1),
FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON DELETE CASCADE);
CREATE TABLE t3(fld1 INT NOT NULL, fld2 INT NOT NULL,
fld3 INT AS (fld2) VIRTUAL, KEY(fld3, fld1),
FOREIGN KEY(fld1) REFERENCES t2(fld1)
ON DELETE CASCADE);
INSERT INTO t1 VALUES(1), (2);
INSERT INTO t2 VALUES(1, 1, DEFAULT), (2, 2, default);
INSERT INTO t3 VALUES(1, 1, DEFAULT), (2, 2, default);
DELETE FROM t1 WHERE fld1= 1;
SELECT fld3, fld1 FROM t2;
fld3 fld1
2 2
SELECT fld3, fld1 FROM t3;
fld3 fld1
2 2
DROP TABLE t3, t2, t1;
# RENAME TABLE
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL,
KEY(fld2, fld1),
FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON DELETE CASCADE);
INSERT INTO t1 VALUES(1), (2);
INSERT INTO t2 VALUES(1, DEFAULT), (2, default);
RENAME TABLE t2 to t3;
DELETE FROM t1 WHERE fld1= 1;
SELECT fld2, fld1 FROM t3;
fld2 fld1
2 2
DROP TABLE t3, t1;
# FOREIGN_KEY_CHECKS disabled DURING INPLACE ALTER
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL,
FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1 VALUES(1), (2);
INSERT INTO t2 VALUES(1, DEFAULT), (2, default);
SET foreign_key_checks = 0;
ALTER TABLE t2 ADD INDEX vk(fld2), ALGORITHM=INPLACE;
SET foreign_key_checks = 1;
UPDATE t1 SET fld1= 3 WHERE fld1= 2;
SELECT fld2 FROM t2;
fld2
1
3
DROP TABLE t2, t1;
# GENERATED COLUMN COMPUTATION FAILS when SQL_MODE
# is set to ERROR_FOR_DIVISION_BY_ZERO
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (100/fld1) VIRTUAL,
KEY(fld2),
FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1 VALUES(1), (2);
INSERT INTO t2 VALUES(1, DEFAULT), (2, default);
UPDATE t1 SET fld1= 0 WHERE fld1= 2;
SELECT fld2 FROM t2;
fld2
NULL
100
DROP TABLE t2, t1;
# CHANGE SQL_MODE and try the ERROR_FOR_DIVISION_BY_ZERO
SET sql_mode = STRICT_ALL_TABLES;
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (100/fld1) VIRTUAL,
KEY(fld2),
FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1 VALUES(1), (2);
INSERT INTO t2 VALUES(1, DEFAULT), (2, default);
UPDATE t1 SET fld1= 0 WHERE fld1= 2;
SELECT fld2 FROM t2;
fld2
NULL
100
SELECT * FROM t2;
fld1 fld2
1 100
0 NULL
DROP TABLE t2, t1;
SET sql_mode = default;
# ADD FOREIGN CONSTRAINT USING COPY
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL, KEY(fld2));
ALTER TABLE t2 ADD FOREIGN KEY (fld1)
REFERENCES t1(fld1) ON UPDATE CASCADE,
ALGORITHM=copy;
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
2
SELECT * FROM t2;
fld1 fld2
2 2
DROP TABLE t2, t1;
# ADD FOREIGN CONSTRAINT USING INPLACE
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL, KEY(fld2));
SET foreign_key_checks = 0;
ALTER TABLE t2 ADD FOREIGN KEY (fld1)
REFERENCES t1(fld1) ON UPDATE CASCADE,
ALGORITHM=inplace;
SET foreign_key_checks = 1;
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
2
SELECT * FROM t2;
fld1 fld2
2 2
DROP TABLE t2, t1;
# DROP FOREIGN CONSTRAINT USING COPY
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL, KEY(fld2),
CONSTRAINT fidx FOREIGN KEY (fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
ALTER TABLE t2 DROP FOREIGN KEY fidx, ALGORITHM=COPY;
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
1
SELECT * FROM t2;
fld1 fld2
1 1
DROP TABLE t2, t1;
# DROP FOREIGN CONSTRAINT USING INPLACE
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL, KEY(fld2),
CONSTRAINT fidx FOREIGN KEY (fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
SET foreign_key_checks = 0;
ALTER TABLE t2 DROP FOREIGN KEY fidx, ALGORITHM=INPLACE;
SET foreign_key_checks = 1;
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
1
SELECT * FROM t2;
fld1 fld2
1 1
DROP TABLE t2, t1;
# ADD VC INDEX and ADD FK IN SAME COPY ALTER
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL);
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
ALTER TABLE t2 ADD INDEX(fld2), ADD FOREIGN KEY (fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE, ALGORITHM=copy;
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
2
SELECT * FROM t2;
fld1 fld2
2 2
DROP TABLE t2, t1;
# ADD VC INDEX and ADD FK IN SAME INPLACE ALTER
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL);
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
SET foreign_key_checks = 0;
ALTER TABLE t2 ADD INDEX(fld2), ADD FOREIGN KEY (fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE, ALGORITHM=inplace;
SET foreign_key_checks = 1;
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
2
SELECT * FROM t2;
fld1 fld2
2 2
DROP TABLE t2, t1;
# ADD VC INDEX and DROP FK IN SAME COPY ALTER
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL,
CONSTRAINT fidx FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
ALTER TABLE t2 ADD INDEX(fld2), DROP FOREIGN KEY fidx, ALGORITHM=copy;
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
1
SELECT * FROM t2;
fld1 fld2
1 1
DROP TABLE t2, t1;
# ADD VC INDEX and DROP FK IN SAME INPLACE ALTER
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL,
CONSTRAINT fidx FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
SET foreign_key_checks = 0;
ALTER TABLE t2 ADD INDEX(fld2), DROP FOREIGN KEY fidx, ALGORITHM=inplace;
SET foreign_key_checks = 1;
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
1
SELECT * FROM t2;
fld1 fld2
1 1
DROP TABLE t2, t1;
# DROP VC INDEX and ADD FK IN SAME COPY ALTER
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL,
KEY idx(fld2));
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
ALTER TABLE t2 DROP INDEX idx, ADD FOREIGN KEY (fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE, ALGORITHM=COPY;
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
2
SELECT * FROM t2;
fld1 fld2
2 2
DROP TABLE t2, t1;
# DROP VC INDEX and ADD FK IN SAME INPLACE ALTER
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL,
KEY idx(fld2));
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
SET foreign_key_checks = 0;
ALTER TABLE t2 DROP INDEX idx, ADD FOREIGN KEY (fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE, ALGORITHM=INPLACE;
SET foreign_key_checks = 1;
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
2
SELECT * FROM t2;
fld1 fld2
2 2
DROP TABLE t2, t1;
# DROP VC INDEX and DROP FK IN SAME COPY ALTER
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL,
KEY idx(fld2),
CONSTRAINT fidx FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
ALTER TABLE t2 DROP KEY idx, DROP FOREIGN KEY fidx, ALGORITHM=COPY;
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
1
SELECT * FROM t2;
fld1 fld2
1 1
DROP TABLE t2, t1;
# DROP VC INDEX and DROP FK IN SAME INPLACE ALTER
CREATE TABLE t1(fld1 INT NOT NULL PRIMARY KEY);
CREATE TABLE t2(fld1 INT NOT NULL,
fld2 INT AS (fld1) VIRTUAL,
KEY idx(fld2),
CONSTRAINT fidx FOREIGN KEY(fld1) REFERENCES t1(fld1)
ON UPDATE CASCADE);
INSERT INTO t1 VALUES(1);
INSERT INTO t2 VALUES(1, DEFAULT);
SET foreign_key_checks = 0;
ALTER TABLE t2 DROP KEY idx, DROP FOREIGN KEY fidx, ALGORITHM=INPLACE;
SET foreign_key_checks = 1;
UPDATE t1 SET fld1= 2;
SELECT fld2 FROM t2;
fld2
1
SELECT * FROM t2;
fld1 fld2
1 1
DROP TABLE t2, t1;
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