SET @saved_binlog_format= @@SESSION.binlog_format;
Warnings:
Warning	1287	'@@binlog_format' is deprecated and will be removed in a future release.
SET SESSION debug= '+d,skip_dd_table_access_check';
SET @@foreign_key_checks= DEFAULT;
#
# WL#6929: Move FOREIGN KEY constraints to the global data dictionary
#
# Test coverage for foreign key name generation. Should be removed
# or rewritten when WL#7141 is pushed.
CREATE TABLE t1(a INT PRIMARY KEY);
CREATE TABLE t2(a INT PRIMARY KEY);
CREATE TABLE t3(a INT PRIMARY KEY, b INT, c INT);
ALTER TABLE t3 ADD FOREIGN KEY (b) REFERENCES t1(a);
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` int NOT NULL,
  `b` int DEFAULT NULL,
  `c` int DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `b` (`b`),
  CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT fk.name FROM mysql.foreign_keys AS fk, mysql.tables AS t
WHERE fk.table_id = t.id AND t.name = 't3';
name
t3_ibfk_1
ALTER TABLE t3 ADD FOREIGN KEY (c) REFERENCES t1(a);
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` int NOT NULL,
  `b` int DEFAULT NULL,
  `c` int DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `b` (`b`),
  KEY `c` (`c`),
  CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`),
  CONSTRAINT `t3_ibfk_2` FOREIGN KEY (`c`) REFERENCES `t1` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT fk.name FROM mysql.foreign_keys AS fk, mysql.tables AS t
WHERE fk.table_id = t.id AND t.name = 't3';
name
t3_ibfk_1
t3_ibfk_2
ALTER TABLE t3 ADD FOREIGN KEY (b) REFERENCES t1(a);
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` int NOT NULL,
  `b` int DEFAULT NULL,
  `c` int DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `c` (`c`),
  KEY `b` (`b`),
  CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`),
  CONSTRAINT `t3_ibfk_2` FOREIGN KEY (`c`) REFERENCES `t1` (`a`),
  CONSTRAINT `t3_ibfk_3` FOREIGN KEY (`b`) REFERENCES `t1` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT fk.name FROM mysql.foreign_keys AS fk, mysql.tables AS t
WHERE fk.table_id = t.id AND t.name = 't3';
name
t3_ibfk_1
t3_ibfk_2
t3_ibfk_3
ALTER TABLE t3 DROP FOREIGN KEY t3_ibfk_1;
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` int NOT NULL,
  `b` int DEFAULT NULL,
  `c` int DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `c` (`c`),
  KEY `b` (`b`),
  CONSTRAINT `t3_ibfk_2` FOREIGN KEY (`c`) REFERENCES `t1` (`a`),
  CONSTRAINT `t3_ibfk_3` FOREIGN KEY (`b`) REFERENCES `t1` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT fk.name FROM mysql.foreign_keys AS fk, mysql.tables AS t
WHERE fk.table_id = t.id AND t.name = 't3';
name
t3_ibfk_2
t3_ibfk_3
ALTER TABLE t3 ADD FOREIGN KEY (b) REFERENCES t1(a);
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `a` int NOT NULL,
  `b` int DEFAULT NULL,
  `c` int DEFAULT NULL,
  PRIMARY KEY (`a`),
  KEY `c` (`c`),
  KEY `b` (`b`),
  CONSTRAINT `t3_ibfk_2` FOREIGN KEY (`c`) REFERENCES `t1` (`a`),
  CONSTRAINT `t3_ibfk_3` FOREIGN KEY (`b`) REFERENCES `t1` (`a`),
  CONSTRAINT `t3_ibfk_4` FOREIGN KEY (`b`) REFERENCES `t1` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
SELECT fk.name FROM mysql.foreign_keys AS fk, mysql.tables AS t
WHERE fk.table_id = t.id AND t.name = 't3';
name
t3_ibfk_2
t3_ibfk_3
t3_ibfk_4
DROP TABLE t3, t2, t1;
CREATE TABLE t1(a INT PRIMARY KEY);
CREATE TABLE name567890123456789012345678901234567890123456789012345678901234(a INT PRIMARY KEY, b INT);
ALTER TABLE name567890123456789012345678901234567890123456789012345678901234
ADD FOREIGN KEY(b) REFERENCES t1(a);
ERROR 42000: Identifier name 'name567890123456789012345678901234567890123456789012345678901234_ibfk_1' is too long
DROP TABLE name567890123456789012345678901234567890123456789012345678901234, t1;
#
# WL#6049: Meta data locking for foreign keys.
#
#
# Normal CT will set the FK unique constraint name.
#
CREATE TABLE parent(pk INTEGER PRIMARY KEY, j INTEGER,
UNIQUE KEY my_key (j));
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk INTEGER,
FOREIGN KEY (fk) REFERENCES parent(j));
SELECT unique_constraint_name FROM mysql.foreign_keys
WHERE referenced_table_name LIKE 'parent';
unique_constraint_name
my_key
DROP TABLES child, parent;
#
# CT introducing a missing parent will update the FK unique constraint name in the child.
#
SET @@foreign_key_checks= 0;
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk INTEGER,
FOREIGN KEY (fk) REFERENCES parent(j));
# An index is created for the FK, but the unique constraint name is NULL.
SELECT name FROM mysql.indexes
WHERE table_id = (SELECT id from mysql.tables WHERE name LIKE 'child');
name
PRIMARY
fk
SELECT unique_constraint_name FROM mysql.foreign_keys
WHERE referenced_table_name LIKE 'parent';
unique_constraint_name
NULL
CREATE TABLE parent(pk INTEGER PRIMARY KEY, j INTEGER,
UNIQUE KEY my_key (j));
SET @@foreign_key_checks= 1;
# After creating the parent, the unique constraint name is updated.
SELECT unique_constraint_name FROM mysql.foreign_keys
WHERE referenced_table_name LIKE 'parent';
unique_constraint_name
my_key
DROP TABLES child, parent;
#
# CTL does not copy FKs from the source table.
#
CREATE TABLE parent(pk INTEGER PRIMARY KEY, j INTEGER,
UNIQUE KEY my_key (j));
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk INTEGER,
FOREIGN KEY (fk) REFERENCES parent(j));
SELECT unique_constraint_name FROM mysql.foreign_keys
WHERE referenced_table_name LIKE 'parent';
unique_constraint_name
my_key
CREATE TABLE child_copy LIKE child;
## The index is re-created for the new table.
SELECT name FROM mysql.indexes
WHERE table_id = (SELECT id from mysql.tables WHERE name LIKE 'child');
name
PRIMARY
fk
SELECT name FROM mysql.indexes
WHERE table_id = (SELECT id from mysql.tables WHERE name LIKE 'child_copy');
name
PRIMARY
fk
## ... but not the constraint.
SELECT unique_constraint_name FROM mysql.foreign_keys
WHERE referenced_table_name LIKE 'parent';
unique_constraint_name
my_key
DROP TABLES child, child_copy, parent;
#
# CTL introducing a missing parent will update the FK in the child.
#
SET @@foreign_key_checks= 0;
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk INTEGER,
FOREIGN KEY (fk) REFERENCES parent(j));
## An index is created for the FK, but the unique constraint name is NULL.
SELECT name FROM mysql.indexes
WHERE table_id = (SELECT id from mysql.tables WHERE name LIKE 'parent');
name
SELECT unique_constraint_name FROM mysql.foreign_keys
WHERE referenced_table_name LIKE 'parent';
unique_constraint_name
NULL
CREATE TABLE parent_base(pk INTEGER PRIMARY KEY, j INTEGER,
UNIQUE KEY my_key (j));
CREATE TABLE parent LIKE parent_base;
SET @@foreign_key_checks= 1;
## After creating the parent, the unique constraint name is updated.
SELECT unique_constraint_name FROM mysql.foreign_keys
WHERE referenced_table_name LIKE 'parent';
unique_constraint_name
my_key
DROP TABLE child, parent_base, parent;
#
# CTS will update the unique constraint name in its FK info.
#
CREATE TABLE source(pk INTEGER PRIMARY KEY, j INTEGER);
INSERT INTO source VALUES (1, 1);
CREATE TABLE parent(pk INTEGER PRIMARY KEY, j INTEGER,
UNIQUE KEY my_key(j));
INSERT INTO parent VALUES (2, 1);
SET @@SESSION.binlog_format=STATEMENT;
Warnings:
Warning	1287	'@@binlog_format' is deprecated and will be removed in a future release.
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk INTEGER,
FOREIGN KEY (fk) REFERENCES parent(j)) AS SELECT pk, j AS fk FROM source;
SET SESSION binlog_format= @saved_binlog_format;
Warnings:
Warning	1287	'@@binlog_format' is deprecated and will be removed in a future release.
SELECT * FROM child;
pk	fk
1	1
## An index is created for the FK, and the unique constraint name is updated.
SELECT name FROM mysql.indexes
WHERE table_id = (SELECT id from mysql.tables WHERE name LIKE 'child');
name
PRIMARY
fk
SELECT unique_constraint_name FROM mysql.foreign_keys
WHERE referenced_table_name LIKE 'parent';
unique_constraint_name
my_key
DROP TABLES source, child, parent;
#
# CTS introducing a missing parent will update the FK in the child.
#
SET @@foreign_key_checks= 0;
CREATE TABLE source(pk INTEGER PRIMARY KEY, j INTEGER);
INSERT INTO source VALUES (1, 1);
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk INTEGER,
FOREIGN KEY (fk) REFERENCES parent(j));
## An index is created for the FK, but the unique constraint name is NULL.
SELECT name FROM mysql.indexes
WHERE table_id = (SELECT id from mysql.tables WHERE name LIKE 'child');
name
PRIMARY
fk
SELECT unique_constraint_name FROM mysql.foreign_keys
WHERE referenced_table_name LIKE 'parent';
unique_constraint_name
NULL
SET @@SESSION.binlog_format=STATEMENT;
Warnings:
Warning	1287	'@@binlog_format' is deprecated and will be removed in a future release.
CREATE TABLE parent(pk INTEGER PRIMARY KEY, j INTEGER,
UNIQUE KEY my_key(j)) AS SELECT * FROM source;
SET SESSION binlog_format= @saved_binlog_format;
Warnings:
Warning	1287	'@@binlog_format' is deprecated and will be removed in a future release.
SELECT * FROM child;
pk	fk
SET @@foreign_key_checks= 1;
## After creating the parent, the unique constraint name is updated.
SELECT unique_constraint_name FROM mysql.foreign_keys
WHERE referenced_table_name LIKE 'parent';
unique_constraint_name
my_key
DROP TABLES source, child, parent;
#
# RENAME will update FK information in both children and parents.
#
CREATE TABLE parent(pk INTEGER PRIMARY KEY, j INTEGER,
UNIQUE KEY parent_key(j));
CREATE TABLE child(pk INTEGER PRIMARY KEY, k INTEGER, fk INTEGER,
FOREIGN KEY (fk) REFERENCES parent(j), UNIQUE KEY child_key(k));
# Constraint is enforced.
INSERT INTO child VALUES (1, 2, 3);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`fk`) REFERENCES `parent` (`j`))
CREATE TABLE grandchild(pk INTEGER PRIMARY KEY, fk INTEGER,
FOREIGN KEY (fk) REFERENCES child(k));
# Constraint is enforced.
INSERT INTO grandchild VALUES (1, 2);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`grandchild`, CONSTRAINT `grandchild_ibfk_1` FOREIGN KEY (`fk`) REFERENCES `child` (`k`))
SET @@foreign_key_checks= 0;
CREATE TABLE orphan_grandchild(pk INTEGER PRIMARY KEY, fk INTEGER,
FOREIGN KEY (fk) REFERENCES siebling(k));
SET @@foreign_key_checks= 1;
# FK definitions before rename:
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	parent_key	test	parent
grandchild_ibfk_1	child_key	test	child
orphan_grandchild_ibfk_1	NULL	test	siebling
RENAME TABLE child TO siebling;
# After the rename, we see that:
# 1. The name of the constraint is changed to 'siebling_ibfk...'.
# 2. The referenced table name of the grandchild is changed to 'siebling'.
# 3. The unique constraint name of the orphan_grandchild is corrected.
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
grandchild_ibfk_1	child_key	test	siebling
orphan_grandchild_ibfk_1	child_key	test	siebling
siebling_ibfk_1	parent_key	test	parent
# Constraint is still enforced.
INSERT INTO siebling VALUES (1, 2, 3);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`siebling`, CONSTRAINT `siebling_ibfk_1` FOREIGN KEY (`fk`) REFERENCES `parent` (`j`))
# Constraint is still enforced.
INSERT INTO grandchild VALUES (1, 2);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`grandchild`, CONSTRAINT `grandchild_ibfk_1` FOREIGN KEY (`fk`) REFERENCES `siebling` (`k`))
# Constraint is enforced here too.
INSERT INTO orphan_grandchild VALUES (1, 2);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`orphan_grandchild`, CONSTRAINT `orphan_grandchild_ibfk_1` FOREIGN KEY (`fk`) REFERENCES `siebling` (`k`))
DROP TABLE grandchild;
DROP TABLE orphan_grandchild;
DROP TABLE siebling;
DROP TABLE parent;
# When processing LOCK TABLES, we will prelock even
# when F_K_C = 0.
#
CREATE TABLE parent(pk INTEGER PRIMARY KEY, j INTEGER,
UNIQUE KEY parent_key(j));
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk INTEGER,
FOREIGN KEY (fk) REFERENCES parent(j) ON DELETE CASCADE);
SET @@foreign_key_checks= 0;
LOCK TABLES parent WRITE;
# There are two metadata locks because the child has
# two different FK roles wrt. the parent. Note that
# the locks are stronger for LOCK TABLES.
SELECT OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, COLUMN_NAME,
LOCK_TYPE FROM performance_schema.metadata_locks
WHERE OBJECT_NAME LIKE 'child'
  ORDER BY OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, COLUMN_NAME, LOCK_TYPE;
OBJECT_TYPE	OBJECT_SCHEMA	OBJECT_NAME	COLUMN_NAME	LOCK_TYPE
COLUMN STATISTICS	test	child	fk	SHARED_READ
COLUMN STATISTICS	test	child	pk	SHARED_READ
TABLE	test	child	NULL	SHARED_NO_READ_WRITE
TABLE	test	child	NULL	SHARED_READ_ONLY
# From another connection, verify that child is locked.
SET @@session.lock_wait_timeout= 1;
INSERT INTO child VALUES (1, 1);
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
UNLOCK TABLES;
SET @@foreign_key_checks= 1;
# Now, the locks are gone.
SELECT LOCK_TYPE FROM performance_schema.metadata_locks
WHERE OBJECT_NAME LIKE 'child';
LOCK_TYPE
DROP TABLE child;
DROP TABLE parent;
#
# A prepared statement will become invalid if a child table
# is modified between executions of the prepared statement.
#
CREATE TABLE parent(pk INTEGER PRIMARY KEY, j INTEGER,
UNIQUE KEY parent_key(j));
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk INTEGER,
FOREIGN KEY (fk) REFERENCES parent(j) ON DELETE CASCADE);
PREPARE stmt FROM 'DELETE FROM parent WHERE pk = ?';
SELECT COUNT_REPREPARE, COUNT_EXECUTE
FROM performance_schema.prepared_statements_instances
WHERE STATEMENT_NAME LIKE 'stmt';
COUNT_REPREPARE	COUNT_EXECUTE
0	0
SET @a= 1;
EXECUTE stmt USING @a;
# No reprepare for first execution.
SELECT COUNT_REPREPARE, COUNT_EXECUTE
FROM performance_schema.prepared_statements_instances
WHERE STATEMENT_NAME LIKE 'stmt';
COUNT_REPREPARE	COUNT_EXECUTE
0	1
# Altering child will trigger reprepare on next execution.
ALTER TABLE child ADD COLUMN (j INTEGER);
EXECUTE stmt USING @a;
# Statement has been reprepared for second execution.
SELECT COUNT_REPREPARE, COUNT_EXECUTE
FROM performance_schema.prepared_statements_instances
WHERE STATEMENT_NAME LIKE 'stmt';
COUNT_REPREPARE	COUNT_EXECUTE
1	2
EXECUTE stmt USING @a;
# Cache version for the prelock entry is updated, so no
# reprepare for third execution.
SELECT COUNT_REPREPARE, COUNT_EXECUTE
FROM performance_schema.prepared_statements_instances
WHERE STATEMENT_NAME LIKE 'stmt';
COUNT_REPREPARE	COUNT_EXECUTE
1	3
DROP TABLE child;
DROP TABLE parent;
#
# Check situations where there are multiple foreign keys
# referring the same table.
#
CREATE TABLE parent(pk INTEGER PRIMARY KEY, i INTEGER, j INTEGER,
UNIQUE KEY parent_i_key(i), UNIQUE KEY parent_j_key(j));
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk_i INTEGER, fk_j INTEGER,
FOREIGN KEY (fk_i) REFERENCES parent(i),
FOREIGN KEY (fk_j) REFERENCES parent(j));
ALTER TABLE child RENAME TO siebling;
DROP TABLES siebling, parent;
#
# Rename a table multiple times in the same statement.
#
CREATE TABLE parent(pk INTEGER PRIMARY KEY, i INTEGER,
UNIQUE KEY parent_key(i));
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk_i INTEGER,
FOREIGN KEY (fk_i) REFERENCES parent(i));
RENAME TABLE parent TO mother, mother TO father;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	parent_key	test	father
RENAME TABLE child TO sister, sister TO brother;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
brother_ibfk_1	parent_key	test	father
RENAME TABLE father TO mother, brother TO sister, mother TO parent, sister TO child;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	parent_key	test	parent
DROP TABLES child, parent;
#
# Let a RENAME statement introduce a missing parent and rename
# it further as well.
#
SET @@foreign_key_checks= 0;
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk_i INTEGER,
FOREIGN KEY (fk_i) REFERENCES mother(i));
SET @@foreign_key_checks= 1;
CREATE TABLE parent(pk INTEGER PRIMARY KEY, i INTEGER,
UNIQUE KEY parent_key(i));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	NULL	test	mother
RENAME TABLE parent TO mother, mother TO father;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	parent_key	test	father
DROP TABLES child, father;
#
# Rename a parent with a child having several FKs to it.
#
CREATE TABLE parent(pk INTEGER PRIMARY KEY, i INTEGER, j INTEGER,
UNIQUE KEY parent_i_key(i),
UNIQUE KEY parent_j_key(j));
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk_i INTEGER, fk_j INTEGER,
FOREIGN KEY (fk_i) REFERENCES parent(i),
FOREIGN KEY (fk_j) REFERENCES parent(j));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	parent_i_key	test	parent
child_ibfk_2	parent_j_key	test	parent
RENAME TABLE parent TO mother;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	parent_i_key	test	mother
child_ibfk_2	parent_j_key	test	mother
DROP TABLES child, mother;
#
# ALTER TABLE RENAME and complex ALTER TABLE RENAME involving
# self-referncing foreign key.
#
CREATE TABLE self (pk INT PRIMARY KEY, fk INT, FOREIGN KEY(fk) REFERENCES self(pk));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
self_ibfk_1	PRIMARY	test	self
ALTER TABLE self RENAME TO self2;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
self2_ibfk_1	PRIMARY	test	self2
ALTER TABLE self2 RENAME TO self3, ADD COLUMN i INT;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
self3_ibfk_1	PRIMARY	test	self3
DROP TABLE self3;
#
# Drop a schema with tables referencing/being referenced by tables
# in a different schema.
#
CREATE TABLE parent(pk INTEGER PRIMARY KEY, i INTEGER,
UNIQUE KEY parent_i_key(i));
SET @@foreign_key_checks= 0;
CREATE TABLE grandchild(pk INTEGER PRIMARY KEY, fk_i INTEGER,
FOREIGN KEY (fk_i) REFERENCES s1.child(i));
SET @@foreign_key_checks= 1;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 's1';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
grandchild_ibfk_1	NULL	s1	child
CREATE SCHEMA s1;
CREATE TABLE s1.child(pk INTEGER PRIMARY KEY, i INTEGER, fk_i INTEGER,
UNIQUE KEY child_i_key(i),
FOREIGN KEY (fk_i) REFERENCES test.parent(i));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	parent_i_key	test	parent
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 's1';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
grandchild_ibfk_1	child_i_key	s1	child
DROP SCHEMA s1;
ERROR HY000: Cannot drop table 'child' referenced by a foreign key constraint 'grandchild_ibfk_1' on table 'grandchild'.
SET @@foreign_key_checks= 0;
DROP SCHEMA s1;
SET @@foreign_key_checks= 1;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 's1';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
grandchild_ibfk_1	NULL	s1	child
# Skip FK to parent.
CREATE SCHEMA s1;
CREATE TABLE s1.child(pk INTEGER PRIMARY KEY, i INTEGER,
UNIQUE KEY child_i_key(i));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 's1';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
grandchild_ibfk_1	child_i_key	s1	child
DROP SCHEMA s1;
ERROR HY000: Cannot drop table 'child' referenced by a foreign key constraint 'grandchild_ibfk_1' on table 'grandchild'.
SET @@foreign_key_checks= 0;
DROP SCHEMA s1;
SET @@foreign_key_checks= 1;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 's1';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
grandchild_ibfk_1	NULL	s1	child
DROP TABLE grandchild;
# No FK from grandchild.
CREATE SCHEMA s1;
CREATE TABLE s1.child(pk INTEGER PRIMARY KEY, fk_i INTEGER);
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
# Introduce FK to parent.
ALTER TABLE s1.child ADD FOREIGN KEY (fk_i) REFERENCES test.parent(i);
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	parent_i_key	test	parent
DROP SCHEMA s1;
DROP TABLE parent;
#
# Trigger an error in Foreign_key_parents_invalidator::invalidate().
#
CREATE TABLE parent(pk INTEGER PRIMARY KEY, i INTEGER,
UNIQUE KEY parent_key(i));
CREATE TABLE child(pk INTEGER PRIMARY KEY, fk_i INTEGER,
FOREIGN KEY (fk_i) REFERENCES parent(i));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	parent_key	test	parent
SET @@session.debug= '+d,fail_while_invalidating_fk_parents';
ALTER TABLE child RENAME TO siebling;
SET @@session.debug= '-d,fail_while_invalidating_fk_parents';
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
siebling_ibfk_1	parent_key	test	parent
DROP TABLE siebling, parent;
#
# Coverage for various corner cases when figuring out unique_constraint_name.
#
CREATE TABLE parent (i INT, j INT, PRIMARY KEY (i), UNIQUE u(i,j));
CREATE TABLE child (i INT, j INT, FOREIGN KEY (i, j) REFERENCES parent (i, j));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	u	test	parent
ALTER TABLE parent RENAME KEY u TO u1;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	u1	test	parent
DROP TABLE child, parent;
CREATE TABLE parent (i INT, j INT, k INT, PRIMARY KEY (i), UNIQUE u(j), UNIQUE u1(i,j), UNIQUE u2(i,j,k));
CREATE TABLE child (i INT, j INT, k INT, FOREIGN KEY (i, j, k) REFERENCES parent (i, j, k));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	u2	test	parent
ALTER TABLE parent RENAME KEY u2 TO u3;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	u3	test	parent
DROP TABLE child, parent;
CREATE TABLE parent (i INT, j INT,
d INT GENERATED ALWAYS AS (i) VIRTUAL,
e INT GENERATED ALWAYS AS (j) VIRTUAL,
PRIMARY KEY (i), UNIQUE u(i,d), UNIQUE u1(i,j,e));
CREATE TABLE child (i INT, j INT, FOREIGN KEY (i, j) REFERENCES parent (i, j));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	u1	test	parent
ALTER TABLE parent RENAME KEY u1 TO u2;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	u2	test	parent
DROP TABLE child, parent;
CREATE TABLE parent (i INT, a VARCHAR(10), b VARCHAR(10),
PRIMARY KEY (i), UNIQUE u(i,a(5)), UNIQUE u1(i,a,b(5)));
CREATE TABLE child (i INT, a VARCHAR(10), FOREIGN KEY (i, a) REFERENCES parent (i, a));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	u1	test	parent
ALTER TABLE parent RENAME KEY u1 TO u2;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
child_ibfk_1	u2	test	parent
DROP TABLE child, parent;
CREATE TABLE self (i INT, j INT, i2 INT, j2 INT, PRIMARY KEY (i), UNIQUE u(i,j),
FOREIGN KEY (i2, j2) REFERENCES self (i, j));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
self_ibfk_1	u	test	self
ALTER TABLE self RENAME KEY u TO u1;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
self_ibfk_1	u1	test	self
DROP TABLE self;
CREATE TABLE self (i INT, j INT, k INT, i2 INT, j2 INT, k2 INT,
PRIMARY KEY (i), UNIQUE u(j), UNIQUE u1(i,j), UNIQUE u2(i,j,k),
FOREIGN KEY (i2, j2, k2) REFERENCES self (i, j, k));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
self_ibfk_1	u2	test	self
ALTER TABLE self RENAME KEY u2 TO u3;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
self_ibfk_1	u3	test	self
DROP TABLE self;
CREATE TABLE self (i INT, j INT, i2 INT, j2 INT,
d INT GENERATED ALWAYS AS (i) VIRTUAL,
e INT GENERATED ALWAYS AS (j) VIRTUAL,
PRIMARY KEY (i), UNIQUE u(i,d), UNIQUE u1(i,j,e),
FOREIGN KEY (i2, j2) REFERENCES self (i, j));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
self_ibfk_1	u1	test	self
ALTER TABLE self RENAME KEY u1 TO u2;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
self_ibfk_1	u2	test	self
DROP TABLE self;
CREATE TABLE self (i INT, a VARCHAR(10), b VARCHAR(10), i2 INT, a2 VARCHAR(10),
PRIMARY KEY (i), UNIQUE u(i,a(5)), UNIQUE u1(i,a,b(5)),
FOREIGN KEY (i2, a2) REFERENCES self (i, a));
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
self_ibfk_1	u1	test	self
ALTER TABLE self RENAME KEY u1 TO u2;
SELECT name, unique_constraint_name, referenced_table_schema, referenced_table_name
FROM mysql.foreign_keys
WHERE referenced_table_schema LIKE 'test';
name	unique_constraint_name	referenced_table_schema	referenced_table_name
self_ibfk_1	u2	test	self
DROP TABLE self;
SET @@foreign_key_checks= DEFAULT;
SET SESSION debug= '-d,skip_dd_table_access_check';
#
# Part of systemic test coverage for metadata locks related to foreign
# keys acquired by various DDL statements which requires debug_sync.
#
# The main part of this coverage resides in foreign_key.test.
#
connect  con1, localhost, root,,;
connection default;
#
# 7) ALTER TABLE ... INPLACE
#
# 7.1) ALTER TABLE ... ADD FOREIGN KEY ... INPLACE must start by
#      acquiring SU lock on parent table.
CREATE TABLE parent (pk INT PRIMARY KEY);
CREATE TABLE child (fk INT);
SET DEBUG_SYNC="alter_table_inplace_after_lock_downgrade SIGNAL reached WAIT_FOR go";
SET FOREIGN_KEY_CHECKS=0;
ALTER TABLE child ADD CONSTRAINT fk FOREIGN KEY (fk) REFERENCES parent (pk), ALGORITHM=INPLACE;;
connection con1;
SET DEBUG_SYNC="now WAIT_FOR reached";
# DML on parent is still possible at this point.
INSERT INTO parent VALUES (1);
# But not DDL.
SET @old_lock_wait_timeout= @@lock_wait_timeout;
SET @@lock_wait_timeout= 1;
ALTER TABLE parent ADD COLUMN a INT;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SET @@lock_wait_timeout= @old_lock_wait_timeout;
SET DEBUG_SYNC="now SIGNAL go";
connection default;
# Reap ALTER TABLE
SET FOREIGN_KEY_CHECKS=1;
ALTER TABLE child DROP FOREIGN KEY fk;
#
# 8) ALTER TABLE ... COPY
#
# 8.1) ALTER TABLE ... ADD FOREIGN KEY ... COPY must start by
#      acquiring SU lock on parent table.
SET DEBUG_SYNC="alter_table_copy_after_lock_upgrade SIGNAL reached WAIT_FOR go";
ALTER TABLE child ADD CONSTRAINT fk FOREIGN KEY (fk) REFERENCES parent (pk), ALGORITHM=COPY;;
connection con1;
SET DEBUG_SYNC="now WAIT_FOR reached";
# DML on parent is still possible at this point.
INSERT INTO parent VALUES (2);
# But not DDL.
SET @old_lock_wait_timeout= @@lock_wait_timeout;
SET @@lock_wait_timeout= 1;
ALTER TABLE parent ADD COLUMN a INT;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SET @@lock_wait_timeout= @old_lock_wait_timeout;
SET DEBUG_SYNC="now SIGNAL go";
connection default;
# Reap ALTER TABLE
SET DEBUG_SYNC="RESET";
ALTER TABLE child DROP FOREIGN KEY fk;
# 8.1') ALTER TABLE ... ADD FOREIGN KEY ... COPY due to workaround
#       must upgrade SU lock on parent table SRO lock.
SET DEBUG_SYNC="alter_after_copy_table SIGNAL reached WAIT_FOR go";
ALTER TABLE child ADD CONSTRAINT fk FOREIGN KEY (fk) REFERENCES parent (pk), ALGORITHM=COPY;;
connection con1;
SET DEBUG_SYNC="now WAIT_FOR reached";
# SELECT on parent is still possible at this point.
SELECT * FROM parent;
pk
1
2
# But not changes.
SET @old_lock_wait_timeout= @@lock_wait_timeout;
SET @@lock_wait_timeout= 1;
DELETE FROM parent;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SET @@lock_wait_timeout= @old_lock_wait_timeout;
SET DEBUG_SYNC="now SIGNAL go";
connection default;
# Reap ALTER TABLE
SET DEBUG_SYNC="RESET";
DROP TABLES child, parent;
connection con1;
disconnect con1;
connection default;