MDEV-28933: Per-table unique FOREIGN KEY constraint names

Before MySQL 4.0.18, user-specified constraint names were ignored.
Starting with MySQL 4.0.18, the specified constraint name was
prepended with the schema name and '/'.  Now we are transforming
into a format where the constraint name is prepended with the
dict_table_t::name and the impossible UTF-8 sequence 0xff.
Generated constraint names will be ASCII decimal numbers.

On upgrade, old FOREIGN KEY constraint names will be displayed
without any schema name prefix. They will be updated to the new
format on DDL operations.

dict_foreign_t::sql_id(): Return the SQL constraint name
without any schemaname/tablename\377 or schemaname/ prefix.

row_rename_table_for_mysql(), dict_table_rename_in_cache():
Simplify the logic: Just rename constraints to the new format.

dict_table_get_foreign_id(): Replaces dict_table_get_highest_foreign_id().

innobase_get_foreign_key_info(): Let my_error() refer to erroneous
anonymous constraints as "(null)".

row_delete_constraint(): Try to drop all 3 constraint name variants.

Reviewed by: Thirunarayanan Balathandayuthapani
Tested by: Matthias Leich

mysql-test/main/alter_table.result

@@ -1539,13 +1539,13 @@ t2	CREATE TABLE `t2` (
   KEY `fk` (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 ALTER TABLE t2 ADD FOREIGN KEY (id) REFERENCES t1(id);
-ALTER TABLE t2 ADD FOREIGN KEY IF NOT EXISTS t2_ibfk_1(id) REFERENCES t1(id);
+ALTER TABLE t2 ADD FOREIGN KEY IF NOT EXISTS `1`(id) REFERENCES t1(id);
 Warnings:
-Note	1061	Duplicate key name 't2_ibfk_1'
+Note	1061	Duplicate key name '1'
-ALTER TABLE t2 DROP FOREIGN KEY IF EXISTS t2_ibfk_1;
+ALTER TABLE t2 DROP FOREIGN KEY IF EXISTS `1`;
-ALTER TABLE t2 DROP FOREIGN KEY IF EXISTS t2_ibfk_1;
+ALTER TABLE t2 DROP FOREIGN KEY IF EXISTS `1`;
 Warnings:
-Note	1091	Can't DROP FOREIGN KEY `t2_ibfk_1`; check that it exists
+Note	1091	Can't DROP FOREIGN KEY `1`; check that it exists
 SHOW CREATE TABLE t2;
 Table	Create Table
 t2	CREATE TABLE `t2` (

mysql-test/main/alter_table.test

@@ -1384,9 +1384,9 @@ ALTER TABLE t2 DROP FOREIGN KEY IF EXISTS fk;
 ALTER TABLE t2 DROP FOREIGN KEY IF EXISTS fk;
 SHOW CREATE TABLE t2;
 ALTER TABLE t2 ADD FOREIGN KEY (id) REFERENCES t1(id);
-ALTER TABLE t2 ADD FOREIGN KEY IF NOT EXISTS t2_ibfk_1(id) REFERENCES t1(id);
+ALTER TABLE t2 ADD FOREIGN KEY IF NOT EXISTS `1`(id) REFERENCES t1(id);
-ALTER TABLE t2 DROP FOREIGN KEY IF EXISTS t2_ibfk_1;
+ALTER TABLE t2 DROP FOREIGN KEY IF EXISTS `1`;
-ALTER TABLE t2 DROP FOREIGN KEY IF EXISTS t2_ibfk_1;
+ALTER TABLE t2 DROP FOREIGN KEY IF EXISTS `1`;
 SHOW CREATE TABLE t2;
 
 DROP TABLE t2;

mysql-test/main/alter_table_combinations,aria.rdiff

@@ -5,7 +5,7 @@
    `a` int(11) DEFAULT NULL,
    `b` int(11) DEFAULT NULL,
 -  KEY `b` (`b`),
--  CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`bb`)
+-  CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`bb`)
 +  KEY `b` (`b`)
  ) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
  ALTER TABLE t1 RENAME COLUMN bb TO b;
@@ -15,7 +15,7 @@
    `a` int(11) DEFAULT NULL,
    `c` int(11) DEFAULT NULL,
 -  KEY `b` (`c`),
--  CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`c`) REFERENCES `t1` (`b`)
+-  CONSTRAINT `1` FOREIGN KEY (`c`) REFERENCES `t1` (`b`)
 +  KEY `b` (`c`)
  ) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
  CREATE TABLE t4(a int);

mysql-test/main/alter_table_combinations,heap.rdiff

@@ -14,7 +14,7 @@
    `a` int(11) DEFAULT NULL,
    `b` int(11) DEFAULT NULL,
 -  KEY `b` (`b`),
--  CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`bb`)
+-  CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`bb`)
 +  KEY `b` (`b`)
  ) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
  ALTER TABLE t1 RENAME COLUMN bb TO b;
@@ -24,7 +24,7 @@
    `a` int(11) DEFAULT NULL,
    `c` int(11) DEFAULT NULL,
 -  KEY `b` (`c`),
--  CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`c`) REFERENCES `t1` (`b`)
+-  CONSTRAINT `1` FOREIGN KEY (`c`) REFERENCES `t1` (`b`)
 +  KEY `b` (`c`)
  ) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
  CREATE TABLE t4(a int);

mysql-test/main/alter_table_combinations.result

@@ -174,7 +174,7 @@ t3	CREATE TABLE `t3` (
   `a` int(11) DEFAULT NULL,
   `b` int(11) DEFAULT NULL,
   KEY `b` (`b`),
-  CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`bb`)
+  CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`bb`)
 ) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 ALTER TABLE t1 RENAME COLUMN bb TO b;
 SHOW CREATE TABLE t1;
@@ -191,7 +191,7 @@ t3	CREATE TABLE `t3` (
   `a` int(11) DEFAULT NULL,
   `c` int(11) DEFAULT NULL,
   KEY `b` (`c`),
-  CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`c`) REFERENCES `t1` (`b`)
+  CONSTRAINT `1` FOREIGN KEY (`c`) REFERENCES `t1` (`b`)
 ) ENGINE=DEFAULT_ENGINE DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 CREATE TABLE t4(a int);
 ALTER TABLE t4 RENAME COLUMN a TO aa, ALGORITHM = INPLACE;

mysql-test/main/analyze.result

@@ -364,7 +364,7 @@ t1	CREATE TABLE `t1` (
   `b` int(11) DEFAULT NULL,
   KEY `b` (`b`),
   KEY `idx` (`aaaa`),
-  CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`aaaa`) REFERENCES `t1` (`b`)
+  CONSTRAINT `1` FOREIGN KEY (`aaaa`) REFERENCES `t1` (`b`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 SELECT index_name FROM mysql.index_stats WHERE table_name = 't1' order by index_name;
 index_name

mysql-test/main/foreign_key.result

@@ -18,7 +18,7 @@ create table t2 (id int PRIMARY KEY, FOREIGN KEY (id) REFERENCES t1(id)) engine=
 insert into t1 values (1), (2), (3), (4), (5), (6);
 insert into t2 values (3), (5);
 delete from t1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`))
 select * from t1;
 id
 1
@@ -29,8 +29,8 @@ id
 6
 delete ignore from t1;
 Warnings:
-Warning	1451	Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`))
+Warning	1451	Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`))
-Warning	1451	Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`))
+Warning	1451	Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`))
 select row_count();
 row_count()
 -1

mysql-test/main/func_rollback.result

@@ -446,7 +446,7 @@ INSERT INTO t1_child SET f1 = 2, f2 = 2;
 RETURN 1;
 END//
 SELECT f1_two_inserts();
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1_child`, CONSTRAINT `t1_child_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t1_parent` (`f1`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1_child`, CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t1_parent` (`f1`))
 SELECT * FROM t1_child;
 f1	f2
 DROP TABLE t1_child;

mysql-test/main/information_schema_db.result

@@ -367,9 +367,9 @@ select table_name, constraint_name, constraint_type from information_schema.tabl
 table_name	constraint_name	constraint_type
 t3	e	UNIQUE
 t3	CONSTRAINT_1	CHECK
-t3	t3_ibfk_1	FOREIGN KEY
+t3	1	FOREIGN KEY
-t3	t3_ibfk_2	FOREIGN KEY
+t3	2	FOREIGN KEY
-t3	t3_ibfk_3	FOREIGN KEY
+t3	3	FOREIGN KEY
 show index in t2;
 Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Ignored
 show index in t3;

mysql-test/main/information_schema_inno.result

@@ -7,22 +7,22 @@ FOREIGN KEY (id, t2_id) REFERENCES t2(t1_id, id)  ON DELETE CASCADE) ENGINE=INNO
 select * from information_schema.TABLE_CONSTRAINTS where
 TABLE_SCHEMA= "test";
 CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_SCHEMA	TABLE_NAME	CONSTRAINT_TYPE
+def	test	1	test	t2	FOREIGN KEY
+def	test	1	test	t3	FOREIGN KEY
+def	test	2	test	t2	FOREIGN KEY
 def	test	PRIMARY	test	t1	PRIMARY KEY
 def	test	PRIMARY	test	t2	PRIMARY KEY
 def	test	PRIMARY	test	t3	PRIMARY KEY
-def	test	t2_ibfk_1	test	t2	FOREIGN KEY
-def	test	t2_ibfk_2	test	t2	FOREIGN KEY
-def	test	t3_ibfk_1	test	t3	FOREIGN KEY
 select * from information_schema.KEY_COLUMN_USAGE where
 TABLE_SCHEMA= "test";
 CONSTRAINT_CATALOG	CONSTRAINT_SCHEMA	CONSTRAINT_NAME	TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	COLUMN_NAME	ORDINAL_POSITION	POSITION_IN_UNIQUE_CONSTRAINT	REFERENCED_TABLE_SCHEMA	REFERENCED_TABLE_NAME	REFERENCED_COLUMN_NAME
+def	test	1	def	test	t2	t1_id	1	1	test	t1	id
+def	test	1	def	test	t3	id	1	1	test	t2	t1_id
+def	test	1	def	test	t3	t2_id	2	2	test	t2	id
+def	test	2	def	test	t2	t1_id	1	1	test	t1	id
 def	test	PRIMARY	def	test	t1	id	1	NULL	NULL	NULL	NULL
 def	test	PRIMARY	def	test	t2	id	1	NULL	NULL	NULL	NULL
 def	test	PRIMARY	def	test	t3	id	1	NULL	NULL	NULL	NULL
-def	test	t2_ibfk_1	def	test	t2	t1_id	1	1	test	t1	id
-def	test	t2_ibfk_2	def	test	t2	t1_id	1	1	test	t1	id
-def	test	t3_ibfk_1	def	test	t3	id	1	1	test	t2	t1_id
-def	test	t3_ibfk_1	def	test	t3	t2_id	2	2	test	t2	id
 drop table t3, t2, t1;
 CREATE TABLE t1(a1 INT NOT NULL, a2 INT NOT NULL,
 PRIMARY KEY(a1, a2)) ENGINE=INNODB;

mysql-test/main/insert_innodb.result

@@ -10,7 +10,7 @@ INSERT INTO t2 VALUES(0);
 # Without fix, an error is reported.
 INSERT IGNORE INTO t2 VALUES(1);
 Warnings:
-Warning	1452	Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
+Warning	1452	Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
 UPDATE IGNORE t2 SET fld2=20 WHERE fld2=0;
 UPDATE IGNORE t1 SET fld1=20 WHERE fld1=0;
 # Test for multi update.
@@ -18,15 +18,15 @@ UPDATE IGNORE t1, t2 SET t2.fld2= t2.fld2 + 3;
 UPDATE IGNORE t1, t2 SET t1.fld1= t1.fld1 + 3;
 # Reports an error since IGNORE is not used.
 INSERT INTO t2 VALUES(1);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
 UPDATE t2 SET fld2=20 WHERE fld2=0;
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
 UPDATE t1 SET fld1=20 WHERE fld1=0;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
 UPDATE t1, t2 SET t2.fld2= t2.fld2 + 3;
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
 UPDATE t1, t2 SET t1.fld1= t1.fld1 + 3;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
 DROP TABLE t2, t1;
 #
 # BUG#22037930: INSERT IGNORE FAILS TO IGNORE FOREIGN

mysql-test/main/lowercase_table4.result

@@ -73,8 +73,8 @@ Create Table	CREATE TABLE `Product_Order` (
   PRIMARY KEY (`No`),
   KEY `Product_Category` (`Product_Category`,`Product_Id`),
   KEY `Customer_Id` (`Customer_Id`),
-  CONSTRAINT `product_order_ibfk_1` FOREIGN KEY (`Product_Category`, `Product_Id`) REFERENCES `Product` (`Category`, `Id`) ON UPDATE CASCADE,
+  CONSTRAINT `1` FOREIGN KEY (`Product_Category`, `Product_Id`) REFERENCES `Product` (`Category`, `Id`) ON UPDATE CASCADE,
-  CONSTRAINT `product_order_ibfk_2` FOREIGN KEY (`Customer_Id`) REFERENCES `Customer` (`Id`)
+  CONSTRAINT `2` FOREIGN KEY (`Customer_Id`) REFERENCES `Customer` (`Id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 SHOW CREATE TABLE Product;
 Table	Product
@@ -93,7 +93,7 @@ Create Table	CREATE TABLE `Customer` (
 SELECT * FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS WHERE CONSTRAINT_SCHEMA='test';
 CONSTRAINT_CATALOG	def
 CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	product_order_ibfk_1
+CONSTRAINT_NAME	1
 UNIQUE_CONSTRAINT_CATALOG	def
 UNIQUE_CONSTRAINT_SCHEMA	test
 UNIQUE_CONSTRAINT_NAME	PRIMARY
@@ -104,7 +104,7 @@ TABLE_NAME	Product_Order
 REFERENCED_TABLE_NAME	Product
 CONSTRAINT_CATALOG	def
 CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	product_order_ibfk_2
+CONSTRAINT_NAME	2
 UNIQUE_CONSTRAINT_CATALOG	def
 UNIQUE_CONSTRAINT_SCHEMA	test
 UNIQUE_CONSTRAINT_NAME	PRIMARY

mysql-test/main/mariadb-import.result

@@ -225,7 +225,7 @@ child	CREATE TABLE `child` (
   `c` char(4) DEFAULT NULL,
   UNIQUE KEY `c` (`c`),
   KEY `par_ind` (`parent_id`),
-  CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`) ON DELETE CASCADE,
+  CONSTRAINT `1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`) ON DELETE CASCADE,
   CONSTRAINT `CONSTRAINT_1` CHECK (`c` >= 'a')
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 drop database db2;

mysql-test/main/trigger-trans.result

@@ -160,7 +160,7 @@ CREATE TRIGGER t1_ad AFTER DELETE ON t1 FOR EACH ROW SET @b = 1;
 SET @a = 0;
 SET @b = 0;
 TRUNCATE t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `test`.`t1` (`a`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `test`.`t1` (`a`))
 SELECT @a, @b;
 @a	@b
 0	0

mysql-test/suite/binlog/r/start_alter_mysqlbinlog_replay.result

@@ -11,7 +11,7 @@ set binlog_alter_two_phase = ON;
 create table t1 (f1 int primary key) engine=InnoDB;
 create table t2 (f1 int primary key, constraint c1 foreign key (f1) references t1(f1)) engine=innodb;
 alter table t2 add constraint c1 foreign key (f1) references t1(f1);
-ERROR HY000: Can't create table `test`.`t2` (errno: 121 "Duplicate key on write or update")
+ERROR HY000: Duplicate FOREIGN KEY constraint name ''
 drop table t2, t1;
 select @@gtid_binlog_state;
 @@gtid_binlog_state

mysql-test/suite/binlog/t/start_alter_mysqlbinlog_replay.test

@@ -21,7 +21,7 @@ set binlog_alter_two_phase = ON;
 create table t1 (f1 int primary key) engine=InnoDB;
 create table t2 (f1 int primary key, constraint c1 foreign key (f1) references t1(f1)) engine=innodb;
 
---error ER_CANT_CREATE_TABLE
+--error ER_DUP_CONSTRAINT_NAME
 alter table t2 add constraint c1 foreign key (f1) references t1(f1);
 
 drop table t2, t1;

mysql-test/suite/funcs_1/r/innodb_trig_frkey.result

@@ -49,7 +49,7 @@ INSERT INTO t1 VALUES (3,'Department C');
 INSERT INTO t2 VALUES (1,2,'Emp 1');
 INSERT INTO t2 VALUES (2,3,'Emp 2');
 insert into t2 VALUES (3,4,'Emp 3');
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f_id`) REFERENCES `t1` (`id`) ON UPDATE CASCADE)
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`f_id`) REFERENCES `t1` (`id`) ON UPDATE CASCADE)
 CREATE TRIGGER tr_t2 BEFORE INSERT ON t2 FOR EACH ROW
 INSERT INTO t1 VALUES(new.f_id, CONCAT('New Department ', new.f_id));
 LOCK TABLES t1 WRITE, t2 WRITE;

mysql-test/suite/galera/r/galera_multirow_rollback.result

@@ -54,7 +54,7 @@ INSERT INTO p VALUES(1, 0);
 START TRANSACTION;
 INSERT INTO c VALUES (3,1);
 INSERT INTO c VALUES (1,1), (2,2);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`c`, CONSTRAINT `c_ibfk_1` FOREIGN KEY (`fk1`) REFERENCES `p` (`id`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`c`, CONSTRAINT `1` FOREIGN KEY (`fk1`) REFERENCES `p` (`id`))
 COMMIT;
 SELECT * FROM p;
 id	j

mysql-test/suite/galera/r/galera_var_fkchecks.result

@@ -19,7 +19,7 @@ SELECT COUNT(*) = 1 FROM child WHERE id = 2;
 COUNT(*) = 1
 1
 INSERT INTO child VALUES (3,3);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
 SET SESSION foreign_key_checks = 0;
 DELETE FROM parent;
 connection node_1;

mysql-test/suite/gcol/inc/gcol_ins_upd.inc

@@ -245,7 +245,7 @@ if ($innodb_engine)
   --error 1451
   update t2 set a=4 where a=3;
   select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
-  alter table t1 drop foreign key t1_ibfk_1;
+  alter table t1 drop foreign key `1`;
 
   --echo #  - ON DELETE RESTRICT
   alter table t1 add foreign key (b) references t2(a) on delete restrict;
@@ -253,14 +253,14 @@ if ($innodb_engine)
   delete from t2 where a=3;
   select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
   select t1.a, t1.b, t2.name from t1 left outer join t2 on (t1.b=t2.a);
-  alter table t1 drop foreign key t1_ibfk_1;
+  alter table t1 drop foreign key `1`;
 
   --echo #  - ON DELETE CASCADE
   alter table t1 add foreign key (b) references t2(a) on delete cascade;
   delete from t2 where a=3;
   select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
   select t1.a, t1.b, t2.name from t1 left outer join t2 on (t1.b=t2.a);
-  alter table t1 drop foreign key t1_ibfk_1;
+  alter table t1 drop foreign key `1`;
 
   drop table t1;
   drop table t2;

mysql-test/suite/gcol/r/gcol_ins_upd_innodb.result

@@ -357,19 +357,19 @@ a	b	name
 #  - ON UPDATE RESTRICT
 alter table t1 add foreign key (b) references t2(a) on update restrict;
 insert into t1 (a) values (4);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
 update t2 set a=4 where a=3;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
 select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
 a	b	name
 1	1	value1
 2	2	value2
 3	3	value3
-alter table t1 drop foreign key t1_ibfk_1;
+alter table t1 drop foreign key `1`;
 #  - ON DELETE RESTRICT
 alter table t1 add foreign key (b) references t2(a) on delete restrict;
 delete from t2 where a=3;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
 select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
 a	b	name
 1	1	value1
@@ -380,7 +380,7 @@ a	b	name
 1	1	value1
 2	2	value2
 3	3	value3
-alter table t1 drop foreign key t1_ibfk_1;
+alter table t1 drop foreign key `1`;
 #  - ON DELETE CASCADE
 alter table t1 add foreign key (b) references t2(a) on delete cascade;
 delete from t2 where a=3;
@@ -392,7 +392,7 @@ select t1.a, t1.b, t2.name from t1 left outer join t2 on (t1.b=t2.a);
 a	b	name
 1	1	value1
 2	2	value2
-alter table t1 drop foreign key t1_ibfk_1;
+alter table t1 drop foreign key `1`;
 drop table t1;
 drop table t2;
 #

mysql-test/suite/gcol/r/innodb_virtual_basic.result

@@ -212,7 +212,7 @@ CREATE TABLE t1(a INT);
 CREATE INDEX idx ON t1(a);
 CREATE TABLE t3(a INT, b INT , INDEX(b), CONSTRAINT x FOREIGN KEY(b) REFERENCES t1(a));
 CREATE TABLE t2(a INT, b INT generated always as (a+1) virtual, INDEX(b), CONSTRAINT x FOREIGN KEY(b) REFERENCES t1(a));
-ERROR HY000: Can't create table `test`.`t2` (errno: 121 "Duplicate key on write or update")
+DROP TABLE t2;
 CREATE TABLE t2(a INT, b INT generated always as (a+1) virtual, INDEX(b));
 DROP TABLE t3;
 DROP TABLE t2;

mysql-test/suite/gcol/t/innodb_virtual_basic.test

@@ -246,8 +246,8 @@ DROP TABLE t1;
 CREATE TABLE t1(a INT);
 CREATE INDEX idx ON t1(a);
 CREATE TABLE t3(a INT, b INT , INDEX(b), CONSTRAINT x FOREIGN KEY(b) REFERENCES t1(a));
---error ER_CANT_CREATE_TABLE
 CREATE TABLE t2(a INT, b INT generated always as (a+1) virtual, INDEX(b), CONSTRAINT x FOREIGN KEY(b) REFERENCES t1(a));
+DROP TABLE t2;
 CREATE TABLE t2(a INT, b INT generated always as (a+1) virtual, INDEX(b));
 DROP TABLE t3;
 DROP TABLE t2;

mysql-test/suite/innodb/r/add_constraint.result

@@ -6,7 +6,7 @@ create table t2(a int, b int, key(a),key(b))engine=innodb;
 alter table t2 add constraint b foreign key (b) references t1(a);
 alter table t1 add constraint b1 foreign key (b) references t2(a);
 alter table t2 add constraint b1 foreign key (b) references t1(a);
-ERROR HY000: Can't create table `test`.`t2` (errno: 121 "Duplicate key on write or update")
+alter table t2 drop foreign key b1;
 alter table t2 drop foreign key b;
 alter table t1 drop foreign key b1;
 drop table t2;

mysql-test/suite/innodb/r/alter_copy_bulk.result

@@ -37,7 +37,7 @@ info: Records: 0  Duplicates: 0  Warnings: 0
 INSERT INTO t1 VALUES (1, 1);
 INSERT INTO t2 VALUES (1, 2);
 ALTER TABLE t2 ADD CONSTRAINT FOREIGN KEY(f2) REFERENCES t1(f1);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`#sql-alter`, CONSTRAINT `#sql-alter_ibfk_2` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`#sql-alter`, CONSTRAINT `2` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`))
 INSERT INTO t1 VALUES(3, 1);
 SET STATEMENT foreign_key_checks=0 FOR
 ALTER TABLE t2 ALGORITHM=COPY, ADD CONSTRAINT FOREIGN KEY(f2) REFERENCES t1(f1);

mysql-test/suite/innodb/r/alter_table.result

@@ -46,7 +46,7 @@ CREATE TABLE tx (pk INT PRIMARY KEY) ENGINE=InnoDB;
 CREATE TABLE t1 (pk INT, a INT, PRIMARY KEY (pk), KEY (a), FOREIGN KEY (a) REFERENCES tx (pk)) ENGINE=InnoDB;
 SET FOREIGN_KEY_CHECKS=OFF;
 ALTER TABLE t1 DROP a;
-ERROR HY000: Cannot drop column 'a': needed in a foreign key constraint 'test/t1_ibfk_1'
+ERROR HY000: Cannot drop column 'a': needed in a foreign key constraint '1'
 SET FOREIGN_KEY_CHECKS=ON;
 ALTER TABLE t1 ADD b INT;
 ALTER TABLE t1 DROP a;

mysql-test/suite/innodb/r/fk_col_alter.result

@@ -23,22 +23,22 @@ 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'
+ERROR HY000: Cannot change column 'msg': used in a foreign key constraint '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'
+ERROR HY000: Cannot change column 'msg': used in a foreign key constraint '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'
+ERROR HY000: Cannot change column 'msg': used in a foreign key constraint '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'
+ERROR HY000: Cannot change column 'msg': used in a foreign key constraint '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")
@@ -48,27 +48,27 @@ 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'
+ERROR HY000: Cannot change column 'msg_1': used in a foreign key constraint '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'
+ERROR HY000: Cannot change column 'msg_1': used in a foreign key constraint '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'
+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=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'
+ERROR HY000: Cannot change column 'msg': used in a foreign key constraint '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'
+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=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'
+ERROR HY000: Cannot change column 'msg': used in a foreign key constraint '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;

mysql-test/suite/innodb/r/fk_drop_alter.result

@@ -39,6 +39,6 @@ t2	CREATE TABLE `t2` (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-best/foo	best/t2	best/t1	1	0
+foo	best/t2	best/t1	1	0
 DROP TABLE best.t2, best.t1, t2, t1;
 DROP DATABASE best;

mysql-test/suite/innodb/r/foreign-keys.result

@@ -22,7 +22,7 @@ insert t2 values (4,1),(5,2),(6,3);
 flush table t2 with read lock;
 connect  con1,localhost,root;
 delete from t1 where a=2;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
 update t1 set a=10 where a=1;
 connection default;
 unlock tables;
@@ -34,7 +34,7 @@ delete from t1 where a=2;
 connection default;
 unlock tables;
 connection con1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
 connection default;
 unlock tables;
 disconnect con1;
@@ -75,7 +75,7 @@ Table	Create Table
 t2	CREATE TABLE `t2` (
   `f2` int(11) NOT NULL,
   PRIMARY KEY (`f2`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`) ON DELETE CASCADE ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`) ON DELETE CASCADE ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 disconnect con1;
 connection default;
@@ -132,7 +132,7 @@ insert t2 values (4,1),(5,2),(6,3);
 flush table t2 with read lock;
 connect  con1,localhost,root;
 delete from t1 where a=2;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
 update t1 set a=10 where a=1;
 connection default;
 unlock tables;
@@ -144,7 +144,7 @@ delete from t1 where a=2;
 connection default;
 unlock tables;
 connection con1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
 connection default;
 unlock tables;
 disconnect con1;
@@ -233,7 +233,7 @@ SET FOREIGN_KEY_CHECKS=0;
 DROP INDEX f2 ON t2;
 SET FOREIGN_KEY_CHECKS=1;
 INSERT INTO t2 VALUES('G', 3);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`))
 DROP TABLE t2, t1;
 SET FOREIGN_KEY_CHECKS=DEFAULT;
 CREATE TABLE t1(a SERIAL) ENGINE=InnoDB ROW_FORMAT=COMPRESSED PAGE_COMPRESSED=1;
@@ -261,7 +261,15 @@ index i2яяяяяяяяяяььььььььььззззззззззшшшшшш
 insert t1яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш values(99, 2);
 alter table t2яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш add foreign key(f2яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш) references t1яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш(f1яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш);
 insert t2яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш values('g', 3);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш`, CONSTRAINT `t2яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш_ibfk_1` FOREIGN KEY (`f2яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш`) REFERENCES `t1яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш` (`f1яяяяяяяяяяььььььььььззззз
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш`, CONSTRAINT `1` FOREIGN KEY (`f2яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш`) REFERENCES `t1яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш` (`f1яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш`))
 drop table t2яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш,
 t1яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш;
 # End of 10.6 tests
+#
+# MDEV-37077 Crash in innobase_get_foreign_key_info()
+#
+CREATE TABLE t (id INT PRIMARY KEY, f INT NOT NULL, KEY(f)) ENGINE=InnoDB;
+SET STATEMENT FOREIGN_KEY_CHECKS = OFF FOR
+ALTER TABLE t ADD FOREIGN KEY (f) REFERENCES t (id) ON UPDATE SET NULL;
+ERROR HY000: Failed to add the foreign key constraint on table 't'. Incorrect options in FOREIGN KEY constraint '(null)'
+DROP TABLE t;

mysql-test/suite/innodb/r/foreign_key.result

@@ -11,10 +11,10 @@ ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint
 create table t2 (f1 int primary key,
 constraint c1 foreign key (f1) references t1(f1)) engine=innodb;
 alter table t2 add constraint c1 foreign key (f1) references t1(f1);
-ERROR HY000: Can't create table `test`.`t2` (errno: 121 "Duplicate key on write or update")
+ERROR HY000: Duplicate FOREIGN KEY constraint name ''
-set foreign_key_checks = 0;
+set statement foreign_key_checks = 0 for
 alter table t2 add constraint c1 foreign key (f1) references t1(f1);
-ERROR HY000: Duplicate FOREIGN KEY constraint name 'test/c1'
+ERROR HY000: Duplicate FOREIGN KEY constraint name 'c1'
 drop table t2, t1;
 #
 # Bug #20031243 CREATE TABLE FAILS TO CHECK IF FOREIGN KEY COLUMN
@@ -48,7 +48,7 @@ t2	CREATE TABLE `t2` (
   `b` int(11) DEFAULT NULL,
   PRIMARY KEY (`a`),
   KEY `ind` (`b`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 INSERT INTO t1 VALUES (1, 80);
 INSERT INTO t1 VALUES (2, 81);
@@ -75,7 +75,7 @@ a	b
 54	4
 55	5
 INSERT INTO t2 VALUES (56, 6);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE)
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE)
 ALTER TABLE t1 CHANGE a id INT;
 SELECT id, b FROM t1 ORDER BY id;
 id	b
@@ -93,9 +93,9 @@ a	b
 55	5
 # Operations on child table
 INSERT INTO t2 VALUES (56, 6);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`id`) ON DELETE CASCADE ON UPDATE CASCADE)
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`id`) ON DELETE CASCADE ON UPDATE CASCADE)
 UPDATE t2 SET b = 99 WHERE a = 51;
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`id`) ON DELETE CASCADE ON UPDATE CASCADE)
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`id`) ON DELETE CASCADE ON UPDATE CASCADE)
 DELETE FROM t2 WHERE a = 53;
 SELECT id, b FROM t1 ORDER BY id;
 id	b
@@ -158,9 +158,9 @@ disconnect incomplete;
 SET GLOBAL innodb_stats_persistent = 0;
 INSERT INTO child SET a=0;
 INSERT INTO child SET a=1;
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`a`) REFERENCES `parent` (`a`) ON DELETE CASCADE)
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `parent` (`a`) ON DELETE CASCADE)
 DELETE FROM parent;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`a`) REFERENCES `parent` (`a`) ON DELETE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `parent` (`a`) ON DELETE CASCADE)
 ALTER TABLE child ADD INDEX(a);
 DELETE FROM parent;
 DROP TABLE child,parent;
@@ -206,7 +206,16 @@ CONSTRAINT t2_ibfk_1 FOREIGN KEY (a) REFERENCES t1(a)) ENGINE=InnoDB;
 CREATE TABLE best.t2 (a INT PRIMARY KEY, b TEXT, FULLTEXT INDEX(b),
 FOREIGN KEY (a) REFERENCES test.t1(a)) ENGINE=InnoDB;
 RENAME TABLE best.t2 TO test.t2;
-ERROR 42S01: Table 't2' already exists
+SHOW CREATE TABLE test.t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) NOT NULL,
+  `b` text DEFAULT NULL,
+  PRIMARY KEY (`a`),
+  FULLTEXT KEY `b` (`b`),
+  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
+RENAME TABLE test.t2 TO best.t2;
 SHOW CREATE TABLE best.t2;
 Table	Create Table
 t2	CREATE TABLE `t2` (
@@ -214,7 +223,7 @@ t2	CREATE TABLE `t2` (
   `b` text DEFAULT NULL,
   PRIMARY KEY (`a`),
   FULLTEXT KEY `b` (`b`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`)
+  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 DROP DATABASE best;
 #
@@ -243,11 +252,21 @@ CREATE TABLE t1 (a INT, UNIQUE(a), KEY(a)) ENGINE=InnoDB;
 ALTER TABLE t1 ADD FOREIGN KEY (a) REFERENCES t1 (a);
 SET SESSION FOREIGN_KEY_CHECKS = OFF;
 ALTER TABLE t1 CHANGE COLUMN a a TIME NOT NULL;
-ERROR HY000: Cannot change column 'a': used in a foreign key constraint 't1_ibfk_1' of table 'test.t1'
+ERROR HY000: Cannot change column 'a': used in a foreign key constraint '1' of table 'test.t1'
 ALTER TABLE t1 ADD pk INT NOT NULL AUTO_INCREMENT PRIMARY KEY;
 ALTER TABLE t1 CHANGE COLUMN a b TIME;
 ERROR 0A000: ALGORITHM=COPY is not supported. Reason: Columns participating in a foreign key are renamed. Try ALGORITHM=INPLACE
-ALTER TABLE t1 CHANGE COLUMN a b TIME, DROP FOREIGN KEY t1_ibfk_1;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) DEFAULT NULL,
+  `pk` int(11) NOT NULL AUTO_INCREMENT,
+  PRIMARY KEY (`pk`),
+  UNIQUE KEY `a` (`a`),
+  KEY `a_2` (`a`),
+  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
+ALTER TABLE t1 CHANGE COLUMN a b TIME, DROP FOREIGN KEY `1`;
 SET SESSION FOREIGN_KEY_CHECKS = ON;
 DROP TABLE t1;
 #
@@ -342,7 +361,7 @@ insert t2 values (4,1),(5,2),(6,3);
 flush table t2 with read lock;
 connect  con1,localhost,root;
 delete from t1 where a=2;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
 update t1 set a=10 where a=1;
 connection default;
 unlock tables;
@@ -354,7 +373,7 @@ delete from t1 where a=2;
 connection default;
 unlock tables;
 connection con1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
 connection default;
 unlock tables;
 disconnect con1;
@@ -389,7 +408,7 @@ insert t1 values (1,1),(2,2),(3,3);
 create table t2 (t1_pk int, foreign key (t1_pk) references t1 (pk)) engine=innodb;
 insert t2 values (1),(2);
 insert t2 values (10);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`t1_pk`) REFERENCES `t1` (`pk`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`t1_pk`) REFERENCES `t1` (`pk`))
 flush tables;
 flush status;
 update t1 set data=10 where pk+1>10;
@@ -478,10 +497,10 @@ pk	f1	f2	f3	f4	f5	f6	f7	f8
 ROLLBACK;
 ALTER TABLE t1 ADD FOREIGN KEY (f5) REFERENCES t1 (f6) ON UPDATE SET NULL;
 UPDATE t1 SET f6='update';
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_3` FOREIGN KEY (`f5`) REFERENCES `t1` (`f6`) ON UPDATE SET NULL)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `3` FOREIGN KEY (`f5`) REFERENCES `t1` (`f6`) ON UPDATE SET NULL)
 ALTER TABLE t1 ADD FOREIGN KEY (f7) REFERENCES t1 (f8) ON UPDATE CASCADE;
 UPDATE t1 SET f6='cascade';
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_3` FOREIGN KEY (`f5`) REFERENCES `t1` (`f6`) ON UPDATE SET NULL)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `3` FOREIGN KEY (`f5`) REFERENCES `t1` (`f6`) ON UPDATE SET NULL)
 DROP TABLE t1;
 # Start of 10.2 tests
 #
@@ -556,7 +575,7 @@ t2	CREATE TABLE `t2` (
   `f` int(11) DEFAULT NULL,
   PRIMARY KEY (`id`),
   KEY `ref_id` (`ref_id`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`ref_id`) REFERENCES `t1` (`id`) ON DELETE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`ref_id`) REFERENCES `t1` (`id`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 connection con1;
 BEGIN;
@@ -688,9 +707,9 @@ connection default;
 DELETE IGNORE FROM t1 WHERE b = 1;
 Warnings:
 Warning	152	InnoDB: Cannot delete/update rows with cascading foreign key constraints that exceed max depth of 15. Please drop extra constraints and try again
-Warning	1296	Got error 193 '`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`b`) ON DELETE CASCADE' from InnoDB
+Warning	1296	Got error 193 '`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`b`) ON DELETE CASCADE' from InnoDB
 Warning	152	InnoDB: Cannot delete/update rows with cascading foreign key constraints that exceed max depth of 15. Please drop extra constraints and try again
-Warning	1296	Got error 193 '`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`b`) ON DELETE CASCADE' from InnoDB
+Warning	1296	Got error 193 '`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`b`) ON DELETE CASCADE' from InnoDB
 SELECT a FROM t1 FORCE INDEX(a);
 a
 0
@@ -737,7 +756,7 @@ DROP TABLE t1;
 # MDEV-17187 table doesn't exist in engine after ALTER other tables
 # with CONSTRAINTs
 #
-call mtr.add_suppression("\\[Warning\\] InnoDB: In ALTER TABLE `test`\\.`t2` has or is referenced in foreign key constraints which are not compatible with the new table definition.");
+call mtr.add_suppression("\\[Warning\\] InnoDB: In ALTER TABLE `test`\\.`t[12]` has or is referenced in foreign key constraints which are not compatible with the new table definition.");
 set foreign_key_checks=on;
 create table t1 (id int not null primary key) engine=innodb;
 create table t2 (id int not null primary key, fid int not null,
@@ -853,11 +872,11 @@ INSERT INTO t1 (a,b) VALUES
 (0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),
 (0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,1),(1,0);
 DELETE FROM t1 WHERE b = 1;
-ERROR HY000: Got error 193 '`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`b`) ON DELETE CASCADE' from InnoDB
+ERROR HY000: Got error 193 '`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`b`) ON DELETE CASCADE' from InnoDB
 SHOW WARNINGS;
 Level	Code	Message
 Warning	152	InnoDB: Cannot delete/update rows with cascading foreign key constraints that exceed max depth of 15. Please drop extra constraints and try again
-Error	1296	Got error 193 '`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`b`) ON DELETE CASCADE' from InnoDB
+Error	1296	Got error 193 '`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`b`) ON DELETE CASCADE' from InnoDB
 DROP TABLE t1;
 FOUND 1 /InnoDB: Cannot delete/update rows with cascading foreign key constraints that exceed max depth of 15.*/ in mysqld.1.err
 # End of 10.2 tests
@@ -941,8 +960,8 @@ t2	CREATE TABLE `t2` (
   `y` int(11) DEFAULT NULL,
   KEY `x` (`x`),
   KEY `fk` (`y`),
-  CONSTRAINT `fk` FOREIGN KEY (`y`) REFERENCES `t1` (`y`),
+  CONSTRAINT `1` FOREIGN KEY (`x`) REFERENCES `t1` (`x`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`x`) REFERENCES `t1` (`x`)
+  CONSTRAINT `fk` FOREIGN KEY (`y`) REFERENCES `t1` (`y`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 create table t3 (z int);
 alter table t3 add x int references t1(x), add y int constraint fk2 references t1(y);
@@ -954,8 +973,8 @@ t3	CREATE TABLE `t3` (
   `y` int(11) DEFAULT NULL,
   KEY `x` (`x`),
   KEY `fk2` (`y`),
-  CONSTRAINT `fk2` FOREIGN KEY (`y`) REFERENCES `t1` (`y`),
+  CONSTRAINT `1` FOREIGN KEY (`x`) REFERENCES `t1` (`x`),
-  CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`x`) REFERENCES `t1` (`x`)
+  CONSTRAINT `fk2` FOREIGN KEY (`y`) REFERENCES `t1` (`y`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 drop tables t3, t2, t1;
 create table t1 (id int primary key);
@@ -967,7 +986,7 @@ Table	Create Table
 t2	CREATE TABLE `t2` (
   `id` int(11) DEFAULT NULL,
   KEY `id` (`id`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`)
+  CONSTRAINT `1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 drop tables t2, t1;
 set default_storage_engine= default;
@@ -1020,7 +1039,7 @@ Table	Create Table
 t2	CREATE TABLE `t2` (
   `a` int(11) NOT NULL,
   PRIMARY KEY (`a`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
+  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 drop tables t2, t1;
 #
@@ -1050,10 +1069,10 @@ CREATE TABLE child(a INT PRIMARY KEY REFERENCES parent(a)) ENGINE=InnoDB;
 connect  con1, localhost, root,,;
 BEGIN;
 INSERT INTO child SET a=1;
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`a`) REFERENCES `parent` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `parent` (`a`))
 connection default;
 TRUNCATE TABLE parent;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`a`) REFERENCES `test`.`parent` (`a`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `test`.`parent` (`a`))
 DROP TABLE parent;
 ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails
 SET innodb_lock_wait_timeout=0;
@@ -1084,7 +1103,7 @@ ALTER TABLE parent FORCE, ALGORITHM=INPLACE;
 ALTER TABLE parent ADD COLUMN b INT, ALGORITHM=INSTANT;
 SET foreign_key_checks=ON;
 TRUNCATE TABLE parent;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`a`) REFERENCES `test`.`parent` (`a`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `test`.`parent` (`a`))
 ALTER TABLE parent FORCE, ALGORITHM=COPY;
 ALTER TABLE parent FORCE, ALGORITHM=INPLACE;
 RENAME TABLE parent TO transparent;
@@ -1148,13 +1167,13 @@ t2	CREATE TABLE `t2` (
   `b` int(11) DEFAULT NULL,
   PRIMARY KEY (`a`),
   UNIQUE KEY `b` (`b`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`b`),
+  CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`b`),
-  CONSTRAINT `t2_ibfk_2` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
+  CONSTRAINT `2` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 INSERT INTO t1 SET a=1;
 INSERT INTO t2 SET a=1;
 DELETE FROM t1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`#mysql50#d-b`.`t2`, CONSTRAINT `t2_ibfk_2` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`#mysql50#d-b`.`t2`, CONSTRAINT `2` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 DELETE FROM t2;
 DELETE FROM t1;
 DROP DATABASE `#mysql50##mysql50#d-b`;
@@ -1172,7 +1191,7 @@ SET STATEMENT foreign_key_checks=0 FOR
 CREATE TABLE t1 (a INT) ENGINE=InnoDB;
 INSERT INTO t1 VALUES (1);
 INSERT INTO t2 VALUES (1);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`))
 ALTER TABLE t1 ADD KEY(a), ALGORITHM=NOCOPY;
 INSERT INTO t2 VALUES (1);
 DROP INDEX b ON t2;
@@ -1181,7 +1200,7 @@ SET STATEMENT foreign_key_checks=0 FOR
 DROP INDEX b ON t2;
 DELETE FROM t2;
 DELETE FROM t1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`))
 ALTER TABLE t2 ADD KEY(b), ALGORITHM=NOCOPY;
 DELETE FROM t1;
 DROP TABLE t2, t1;
@@ -1224,6 +1243,6 @@ INSERT INTO t2 VALUES('MySQL', 'MySQL', 1),
 ALTER TABLE t1 ADD FOREIGN KEY (f1) REFERENCES t2 (f2);
 ALTER TABLE t2 ADD FOREIGN KEY (f2) REFERENCES t2 (f2),
 ADD UNIQUE INDEX(f3);
-ERROR HY000: Cannot delete rows from table which is parent in a foreign key constraint 't1_ibfk_1' of table 't1'
+ERROR HY000: Cannot delete rows from table which is parent in a foreign key constraint '1' of table 't1'
 drop table t1, t2;
 # End of 10.11 tests

mysql-test/suite/innodb/r/foreign_key_debug.result

@@ -22,7 +22,7 @@ Table	Create Table
 t2	CREATE TABLE `t2` (
   `f2` int(11) NOT NULL,
   PRIMARY KEY (`f2`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`) ON DELETE CASCADE ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`) ON DELETE CASCADE ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 disconnect con1;
 connection default;

mysql-test/suite/innodb/r/foreign_null.result

@@ -3,7 +3,7 @@ call mtr.add_suppression("InnoDB: In ALTER TABLE .* has or is referenced in fore
 CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
 CREATE TABLE t2(f1 INT, FOREIGN KEY(f1) REFERENCES t1(f2) ON UPDATE CASCADE)ENGINE=InnoDB;
 ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
-ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 DROP TABLE t2, t1;
 # modify child column NOT NULL ON DELETE CASCADE..parent column NULL
 CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
@@ -14,13 +14,13 @@ DROP TABLE t2, t1;
 CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
 CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY(f1) REFERENCES t1(f1) ON UPDATE SET NULL)ENGINE=InnoDB;
 ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
-ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 DROP TABLE t2, t1;
 # modify child column NOT NULL ON DELETE SET NULL
 CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
 CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY (f2) REFERENCES t1(f2) ON DELETE SET NULL)ENGINE=InnoDB;
 ALTER TABLE t2 MODIFY COLUMN f2 INT NOT NULL;
-ERROR HY000: Column 'f2' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+ERROR HY000: Column 'f2' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 DROP TABLE t2, t1;
 # modify child column NOT NULL ON UPDATE RESTRICT..parent column NULL
 CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
@@ -48,7 +48,7 @@ CREATE TABLE `t#2`(f1 INT NOT NULL,
 FOREIGN KEY(f1) REFERENCES `t#1`(f2)
 ON UPDATE CASCADE)ENGINE=InnoDB;
 ALTER TABLE `t#1` MODIFY COLUMN f2 INT;
-ERROR HY000: Cannot change column 'f2': used in a foreign key constraint 't#2_ibfk_1' of table 'test.t#2'
+ERROR HY000: Cannot change column 'f2': used in a foreign key constraint '1' of table 'test.t#2'
 DROP TABLE `t#2`, `t#1`;
 # modify parent column NULL ON DELETE CASCADE child column NOT NULL
 CREATE TABLE t1(f1 INT, f2 INT NOT NULL, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
@@ -94,7 +94,7 @@ INDEX(f1, f2),
 FOREIGN KEY(f1, f2) REFERENCES t1(f1, f2) ON
 UPDATE CASCADE)ENGINE=InnoDB;
 ALTER TABLE t1 MODIFY COLUMN f1 INT;
-ERROR HY000: Cannot change column 'f1': used in a foreign key constraint 't2_ibfk_1' of table 'test.t2'
+ERROR HY000: Cannot change column 'f1': used in a foreign key constraint '1' of table 'test.t2'
 DROP TABLE t2, t1;
 # modify child column NOT NULL ON UPDATE CASCADE parent column NULL
 CREATE TABLE t1(f1 INT, f2 INT, INDEX(f1, f2))ENGINE=InnoDB;
@@ -102,7 +102,7 @@ CREATE TABLE t2(f1 INT, f2 INT, INDEX(f1, f2),
 FOREIGN KEY(f1, f2) REFERENCES t1(f1, f2) ON
 UPDATE CASCADE)ENGINE=InnoDB;
 ALTER TABLE t2 MODIFY COLUMN f2 INT NOT NULL;
-ERROR HY000: Column 'f2' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+ERROR HY000: Column 'f2' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 DROP TABLE t2, t1;
 # allow foreign key constraints when parent table created later
 SET FOREIGN_KEY_CHECKS=0;
@@ -113,7 +113,7 @@ CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
 INSERT INTO t1 VALUES(1, 1);
 INSERT INTO t2 VALUES(1);
 UPDATE t1 SET f2= NULL;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE)
 SELECT * FROM t2;
 f1
 1

mysql-test/suite/innodb/r/foreign_sql_mode,COPY,NON-STRICT.rdiff

@@ -4,11 +4,11 @@
  CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
  CREATE TABLE t2(f1 INT, FOREIGN KEY(f1) REFERENCES t1(f2) ON UPDATE CASCADE)ENGINE=InnoDB;
  ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
--ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+-ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
  INSERT INTO t1 VALUES(1, 1);
  INSERT INTO t2 VALUES(1);
  UPDATE t1 SET f2= NULL;
-+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE)
++ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE)
  DELETE FROM t2;
  SELECT * FROM t1;
  f1	f2
@@ -21,7 +21,7 @@
  CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
  CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY(f1) REFERENCES t1(f1) ON UPDATE SET NULL)ENGINE=InnoDB;
  ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
--ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+-ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 +ERROR HY000: Error on rename of 'OLD_FILE_NAME' to 'NEW_FILE_NAME' (errno: 150 "Foreign key constraint is incorrectly formed")
  INSERT INTO t1 VALUES(1, 1);
  INSERT INTO t2 VALUES(1, 1);
@@ -30,7 +30,7 @@
  CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
  CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY (f2) REFERENCES t1(f2) ON DELETE SET NULL)ENGINE=InnoDB;
  ALTER TABLE t2 MODIFY COLUMN f2 INT NOT NULL;
--ERROR HY000: Column 'f2' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+-ERROR HY000: Column 'f2' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 +ERROR HY000: Error on rename of 'OLD_FILE_NAME' to 'NEW_FILE_NAME' (errno: 150 "Foreign key constraint is incorrectly formed")
  DROP TABLE t2, t1;
  # modify parent column NULL ON UPDATE CASCADE child column NOT NULL
@@ -39,12 +39,12 @@
  FOREIGN KEY(f1) REFERENCES `t#1`(f2)
  ON UPDATE CASCADE)ENGINE=InnoDB;
  ALTER TABLE `t#1` MODIFY COLUMN f2 INT;
--ERROR HY000: Cannot change column 'f2': used in a foreign key constraint 't#2_ibfk_1' of table 'test.t#2'
+-ERROR HY000: Cannot change column 'f2': used in a foreign key constraint '1' of table 'test.t#2'
  INSERT INTO `t#1` VALUES(1, 1);
  INSERT INTO `t#2` VALUES(1);
  UPDATE `t#1` SET f2= NULL;
 -ERROR 23000: Column 'f2' cannot be null
-+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t#2`, CONSTRAINT `t#2_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t#1` (`f2`) ON UPDATE CASCADE)
++ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t#2`, CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t#1` (`f2`) ON UPDATE CASCADE)
  DELETE FROM `t#2`;
  SELECT * FROM `t#1`;
  f1	f2

mysql-test/suite/innodb/r/foreign_sql_mode,COPY,NOSTRICT.rdiff

@@ -4,11 +4,11 @@
  CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
  CREATE TABLE t2(f1 INT, FOREIGN KEY(f1) REFERENCES t1(f2) ON UPDATE CASCADE)ENGINE=InnoDB;
  ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
--ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+-ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
  INSERT INTO t1 VALUES(1, 1);
  INSERT INTO t2 VALUES(1);
  UPDATE t1 SET f2= NULL;
-+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE)
++ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE)
  DELETE FROM t2;
  SELECT * FROM t1;
  f1	f2
@@ -19,7 +19,7 @@
  CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
  CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY(f1) REFERENCES t1(f1) ON UPDATE SET NULL)ENGINE=InnoDB;
  ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
--ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+-ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 +ERROR HY000: Error on rename of 'OLD_FILE_NAME' to 'NEW_FILE_NAME' (errno: 150 "Foreign key constraint is incorrectly formed")
  INSERT INTO t1 VALUES(1, 1);
  INSERT INTO t2 VALUES(1, 1);
@@ -28,7 +28,7 @@
  CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
  CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY (f2) REFERENCES t1(f2) ON DELETE SET NULL)ENGINE=InnoDB;
  ALTER TABLE t2 MODIFY COLUMN f2 INT NOT NULL;
--ERROR HY000: Column 'f2' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+-ERROR HY000: Column 'f2' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 +ERROR HY000: Error on rename of 'OLD_FILE_NAME' to 'NEW_FILE_NAME' (errno: 150 "Foreign key constraint is incorrectly formed")
  DROP TABLE t2, t1;
  # modify parent column NULL ON UPDATE CASCADE child column NOT NULL
@@ -37,12 +37,12 @@
  FOREIGN KEY(f1) REFERENCES `t#1`(f2)
  ON UPDATE CASCADE)ENGINE=InnoDB;
  ALTER TABLE `t#1` MODIFY COLUMN f2 INT;
--ERROR HY000: Cannot change column 'f2': used in a foreign key constraint 't#2_ibfk_1' of table 'test.t#2'
+-ERROR HY000: Cannot change column 'f2': used in a foreign key constraint '1' of table 'test.t#2'
  INSERT INTO `t#1` VALUES(1, 1);
  INSERT INTO `t#2` VALUES(1);
  UPDATE `t#1` SET f2= NULL;
 -ERROR 23000: Column 'f2' cannot be null
-+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t#2`, CONSTRAINT `t#2_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t#1` (`f2`) ON UPDATE CASCADE)
++ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t#2`, CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t#1` (`f2`) ON UPDATE CASCADE)
  DELETE FROM `t#2`;
  SELECT * FROM `t#1`;
  f1	f2

mysql-test/suite/innodb/r/foreign_sql_mode,INPLACE,NON-STRICT.rdiff

@@ -4,11 +4,11 @@
  CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
  CREATE TABLE t2(f1 INT, FOREIGN KEY(f1) REFERENCES t1(f2) ON UPDATE CASCADE)ENGINE=InnoDB;
  ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
--ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+-ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
  INSERT INTO t1 VALUES(1, 1);
  INSERT INTO t2 VALUES(1);
  UPDATE t1 SET f2= NULL;
-+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE)
++ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE)
  DELETE FROM t2;
  SELECT * FROM t1;
  f1	f2
@@ -21,12 +21,12 @@
  FOREIGN KEY(f1) REFERENCES `t#1`(f2)
  ON UPDATE CASCADE)ENGINE=InnoDB;
  ALTER TABLE `t#1` MODIFY COLUMN f2 INT;
--ERROR HY000: Cannot change column 'f2': used in a foreign key constraint 't#2_ibfk_1' of table 'test.t#2'
+-ERROR HY000: Cannot change column 'f2': used in a foreign key constraint '1' of table 'test.t#2'
  INSERT INTO `t#1` VALUES(1, 1);
  INSERT INTO `t#2` VALUES(1);
  UPDATE `t#1` SET f2= NULL;
 -ERROR 23000: Column 'f2' cannot be null
-+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t#2`, CONSTRAINT `t#2_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t#1` (`f2`) ON UPDATE CASCADE)
++ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t#2`, CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t#1` (`f2`) ON UPDATE CASCADE)
  DELETE FROM `t#2`;
  SELECT * FROM `t#1`;
  f1	f2

mysql-test/suite/innodb/r/foreign_sql_mode.result

@@ -3,7 +3,7 @@ call mtr.add_suppression("InnoDB: In ALTER TABLE .* has or is referenced in fore
 CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
 CREATE TABLE t2(f1 INT, FOREIGN KEY(f1) REFERENCES t1(f2) ON UPDATE CASCADE)ENGINE=InnoDB;
 ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
-ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 INSERT INTO t1 VALUES(1, 1);
 INSERT INTO t2 VALUES(1);
 UPDATE t1 SET f2= NULL;
@@ -20,7 +20,7 @@ DROP TABLE t2, t1;
 CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
 CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY(f1) REFERENCES t1(f1) ON UPDATE SET NULL)ENGINE=InnoDB;
 ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
-ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 INSERT INTO t1 VALUES(1, 1);
 INSERT INTO t2 VALUES(1, 1);
 UPDATE t1 SET f1= 2;
@@ -32,7 +32,7 @@ DROP TABLE t2, t1;
 CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
 CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY (f2) REFERENCES t1(f2) ON DELETE SET NULL)ENGINE=InnoDB;
 ALTER TABLE t2 MODIFY COLUMN f2 INT NOT NULL;
-ERROR HY000: Column 'f2' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+ERROR HY000: Column 'f2' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 DROP TABLE t2, t1;
 # modify parent column NULL ON UPDATE CASCADE child column NOT NULL
 CREATE TABLE `t#1`(f1 INT, f2 INT NOT NULL, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
@@ -40,7 +40,7 @@ CREATE TABLE `t#2`(f1 INT NOT NULL,
 FOREIGN KEY(f1) REFERENCES `t#1`(f2)
 ON UPDATE CASCADE)ENGINE=InnoDB;
 ALTER TABLE `t#1` MODIFY COLUMN f2 INT;
-ERROR HY000: Cannot change column 'f2': used in a foreign key constraint 't#2_ibfk_1' of table 'test.t#2'
+ERROR HY000: Cannot change column 'f2': used in a foreign key constraint '1' of table 'test.t#2'
 INSERT INTO `t#1` VALUES(1, 1);
 INSERT INTO `t#2` VALUES(1);
 UPDATE `t#1` SET f2= NULL;

mysql-test/suite/innodb/r/innodb-alter-table.result

@@ -132,7 +132,7 @@ child	CREATE TABLE `child` (
   `c` int(11) NOT NULL,
   PRIMARY KEY (`a`),
   KEY `c` (`c`),
-  CONSTRAINT `child_ibfk_1` FOREIGN KEY (`c`) REFERENCES `parent` (`a`)
+  CONSTRAINT `1` FOREIGN KEY (`c`) REFERENCES `parent` (`a`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 DROP TABLE child, parent;
 CREATE TABLE IF NOT EXISTS ticket (

mysql-test/suite/innodb/r/innodb-alter.result

@@ -20,8 +20,8 @@ WHERE FOR_NAME LIKE 'test/t%';
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c2	0
+t1c2	c2	c2	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
 FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
 INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
@@ -37,8 +37,8 @@ c2	0	c2
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c2	0
+t1c2	c2	c2	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -73,8 +73,8 @@ c2	0	c2
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c2	0
+t1c2	c2	c2	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1 CHANGE c2 c2 INT AFTER c1;
 ALTER TABLE t1 CHANGE c1 c1 INT FIRST;
 SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
@@ -92,8 +92,8 @@ c2	0	c2
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c2	0
+t1c2	c2	c2	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1 CHANGE C2 c3 INT;
 SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
 FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
@@ -110,8 +110,8 @@ c2	0	c3
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c3	0
+t1c2	c2	c3	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1 CHANGE c3 C INT;
 SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
 FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
@@ -128,14 +128,14 @@ c2	0	C
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	C	0
+t1c2	c2	C	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1 CHANGE C Cöŀumň_TWO INT;
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	Cöŀumň_TWO	0
+t1c2	c2	Cöŀumň_TWO	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
 FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
 INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
@@ -151,8 +151,8 @@ c2	0	Cöŀumň_TWO
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	Cöŀumň_TWO	0
+t1c2	c2	Cöŀumň_TWO	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1 CHANGE cöĿǖmň_two c3 INT;
 ERROR 42S22: Unknown column 'cöĿǖmň_two' in 't1'
 ALTER TABLE t1 CHANGE cÖĿUMŇ_two c3 INT, RENAME TO t3;
@@ -250,8 +250,8 @@ c2	0	c3
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c3	0
+t1c2	c2	c3	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1 DROP INDEX c2;
 ERROR HY000: Cannot drop index 'c2': needed in a foreign key constraint
 ALTER TABLE t1 DROP INDEX c4;
@@ -308,8 +308,8 @@ c2	0	c3
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c3	0
+t1c2	c2	c3	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 CREATE TABLE t1p (c1 INT PRIMARY KEY, c2 INT, INDEX(c2)) ENGINE=InnoDB;
 ALTER TABLE t1c DROP INDEX C2, DROP INDEX C3;
 ERROR HY000: Cannot drop index 'c2': needed in a foreign key constraint
@@ -344,8 +344,8 @@ c2	0	c3
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c3	0
+t1c2	c2	c3	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1c DROP FOREIGN KEY t1C3;
 SHOW CREATE TABLE t1c;
 Table	Create Table
@@ -372,7 +372,7 @@ c2	0	c3
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c3	0
+t1c2	c2	c3	0
 ALTER TABLE t1c DROP INDEX c2, DROP FOREIGN KEY t1C2;
 SHOW CREATE TABLE t1c;
 Table	Create Table
@@ -726,7 +726,7 @@ Table	Create Table
 t2	CREATE TABLE `t2` (
   `c2` int(11) NOT NULL,
   KEY `c2` (`c2`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`c2`) REFERENCES `t1` (`c1`)
+  CONSTRAINT `1` FOREIGN KEY (`c2`) REFERENCES `t1` (`c1`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 ALTER TABLE t1 CHANGE COLUMN c1 C1 INT;
 ALTER TABLE t2 CHANGE COLUMN c2 C2 INT;
@@ -741,7 +741,7 @@ Table	Create Table
 t2	CREATE TABLE `t2` (
   `C2` int(11) DEFAULT NULL,
   KEY `c2` (`C2`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`C2`) REFERENCES `t1` (`C1`)
+  CONSTRAINT `1` FOREIGN KEY (`C2`) REFERENCES `t1` (`C1`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 ALTER TABLE t1 CHANGE COLUMN C1 c5 INT;
 ALTER TABLE t2 CHANGE COLUMN C2 c6 INT;
@@ -756,7 +756,7 @@ Table	Create Table
 t2	CREATE TABLE `t2` (
   `c6` int(11) DEFAULT NULL,
   KEY `c2` (`c6`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`c6`) REFERENCES `t1` (`c5`)
+  CONSTRAINT `1` FOREIGN KEY (`c6`) REFERENCES `t1` (`c5`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 SELECT C.NAME FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS C INNER JOIN
 INFORMATION_SCHEMA.INNODB_SYS_TABLES T ON C.TABLE_ID=T.TABLE_ID
@@ -845,27 +845,27 @@ t2	CREATE TABLE `t2` (
   KEY `bb` (`BB`),
   KEY `CC` (`CC`),
   KEY `DD` (`DD`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`),
+  CONSTRAINT `1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`),
-  CONSTRAINT `t2_ibfk_2` FOREIGN KEY (`BB`) REFERENCES `t1` (`B`),
+  CONSTRAINT `2` FOREIGN KEY (`BB`) REFERENCES `t1` (`B`),
-  CONSTRAINT `t2_ibfk_3` FOREIGN KEY (`CC`) REFERENCES `t1` (`C`),
+  CONSTRAINT `3` FOREIGN KEY (`CC`) REFERENCES `t1` (`C`),
-  CONSTRAINT `t2_ibfk_4` FOREIGN KEY (`DD`) REFERENCES `t1` (`D`)
+  CONSTRAINT `4` FOREIGN KEY (`DD`) REFERENCES `t1` (`D`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 DELETE FROM t1 WHERE a=1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
 DELETE FROM t1 WHERE A=1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
 DELETE FROM t1 WHERE b=1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
 DELETE FROM t1 WHERE B=1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
 DELETE FROM t1 WHERE c=1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
 DELETE FROM t1 WHERE C=1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
 DELETE FROM t1 WHERE d=1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
 DELETE FROM t1 WHERE D=1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`AA`) REFERENCES `t1` (`A`))
 DROP TABLE t2, t1;
 # virtual columns case too
 CREATE TABLE t1 (a INT, b INT GENERATED ALWAYS AS (a) VIRTUAL) ENGINE = InnoDB;

mysql-test/suite/innodb/r/innodb-fk-warnings.result

@@ -13,13 +13,9 @@ c int not null,
 CONSTRAINT mytest FOREIGN KEY (c) REFERENCES t1(id),
 CONSTRAINT test FOREIGN KEY (b) REFERENCES t2 (id)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
-ERROR HY000: Can't create table `test`.`t2` (errno: 121 "Duplicate key on write or update")
 show warnings;
 Level	Code	Message
-Warning	121	CREATE or ALTER TABLE `test`.`t2` failed: duplicate name, CONSTRAINT `test` FOREIGN KEY (`b`) REFERENCES `t2` (`id`)
+drop table t2,t1;
-Error	1005	Can't create table `test`.`t2` (errno: 121 "Duplicate key on write or update")
-Warning	1022	Can't write; duplicate key in table 't2'
-drop table t1;
 create table t1(a int) engine=innodb;
 create table t2(a int, constraint a foreign key a (a) references t1(a)) engine=innodb;
 ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint is incorrectly formed")

mysql-test/suite/innodb/r/innodb-fk.result

@@ -135,7 +135,7 @@ Table	Create Table
   PRIMARY KEY (`id_depart`,`id_depart_in`),
   KEY `id_depart_in` (`id_depart_in`),
   CONSTRAINT `#departaments_tree_ibfk_1` FOREIGN KEY (`id_depart`) REFERENCES `#departaments` (`id_depart`),
-  CONSTRAINT `#departaments_tree_ibfk_2` FOREIGN KEY (`id_depart_in`) REFERENCES `#departaments` (`id_depart`)
+  CONSTRAINT `1` FOREIGN KEY (`id_depart_in`) REFERENCES `#departaments` (`id_depart`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_uca1400_ai_ci
 DROP TABLE `#departaments_tree`;
 DROP TABLE `#departaments`;
@@ -145,11 +145,11 @@ CREATE TABLE `boroda` (
 `b` INT(11) UNSIGNED DEFAULT NULL,
 PRIMARY KEY (`id`),
 KEY `a` (`a`),
-CONSTRAINT `boroda_ibfk_1` FOREIGN KEY (`a`) REFERENCES `boroda` (`id`)
+CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `boroda` (`id`)
 ) ENGINE=INNODB DEFAULT CHARSET=utf8;
 ALTER TABLE `boroda`
   ADD FOREIGN KEY (`b`) REFERENCES `boroda`(`id`);
-ALTER TABLE `boroda` DROP FOREIGN KEY `boroda_ibfk_2`;
+ALTER TABLE `boroda` DROP FOREIGN KEY `2`;
 RENAME TABLE `boroda` TO `#boroda`;
 ALTER TABLE `#boroda`
 ADD FOREIGN KEY (`b`) REFERENCES `#boroda`(`id`);
@@ -162,8 +162,8 @@ Table	Create Table
   PRIMARY KEY (`id`),
   KEY `a` (`a`),
   KEY `b` (`b`),
-  CONSTRAINT `#boroda_ibfk_1` FOREIGN KEY (`a`) REFERENCES `#boroda` (`id`),
+  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `#boroda` (`id`),
-  CONSTRAINT `#boroda_ibfk_2` FOREIGN KEY (`b`) REFERENCES `#boroda` (`id`)
+  CONSTRAINT `2` FOREIGN KEY (`b`) REFERENCES `#boroda` (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_uca1400_ai_ci
 DROP TABLE `#boroda`;
 CREATE TABLE `boroda` (
@@ -172,7 +172,7 @@ CREATE TABLE `boroda` (
 `b` INT(11) UNSIGNED DEFAULT NULL,
 PRIMARY KEY (`id`),
 KEY `a` (`a`),
-CONSTRAINT `boroda_ibfk_1` FOREIGN KEY (`a`) REFERENCES `boroda` (`id`)
+CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `boroda` (`id`)
 ) ENGINE=INNODB DEFAULT CHARSET=utf8;
 RENAME TABLE `boroda` TO `bor#oda`;
 ALTER TABLE `bor#oda`
@@ -186,8 +186,8 @@ bor#oda	CREATE TABLE `bor#oda` (
   PRIMARY KEY (`id`),
   KEY `a` (`a`),
   KEY `b` (`b`),
-  CONSTRAINT `bor#oda_ibfk_1` FOREIGN KEY (`a`) REFERENCES `bor#oda` (`id`),
+  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `bor#oda` (`id`),
-  CONSTRAINT `bor#oda_ibfk_2` FOREIGN KEY (`b`) REFERENCES `bor#oda` (`id`)
+  CONSTRAINT `2` FOREIGN KEY (`b`) REFERENCES `bor#oda` (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_uca1400_ai_ci
 DROP TABLE `bor#oda`;
 #
@@ -216,7 +216,7 @@ CREATE TABLE t1_fk (a VARCHAR(40), KEY a (a), FULLTEXT KEY(a), CONSTRAINT fk FOR
 ALTER TABLE t1 RENAME TO tm1, ALGORITHM=COPY;
 SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk	test/t1_fk	test/t1	1	4
+fk	test/t1_fk	test/t1	1	4
 SET FOREIGN_KEY_CHECKS=0;
 CREATE TABLE t1 (c1 BIGINT NOT NULL, c2 BIGINT NOT NULL, PRIMARY KEY(c1), UNIQUE KEY(c2)) ENGINE=MEMORY;
 ALTER TABLE t1 ENGINE=InnoDB, ALGORITHM=COPY;

mysql-test/suite/innodb/r/innodb-index-online-fk.result

@@ -14,14 +14,14 @@ REFERENCES parent(b) ON DELETE SET NULL ON UPDATE CASCADE,
 ALGORITHM = INPLACE;
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_1	test/child	test/parent	1	6
+fk_1	test/child	test/parent	1	6
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_1	a2	b	0
+fk_1	a2	b	0
 ALTER TABLE child ADD CONSTRAINT fk_1 FOREIGN KEY (a2)
 REFERENCES parent(b) ON DELETE SET NULL ON UPDATE CASCADE,
 ALGORITHM = INPLACE;
-ERROR HY000: Duplicate FOREIGN KEY constraint name 'test/fk_1'
+ERROR HY000: Duplicate FOREIGN KEY constraint name 'fk_1'
 SET foreign_key_checks = 1;
 INSERT INTO child VALUES(1,2),(2,3);
 INSERT INTO child VALUES(4,4);
@@ -54,19 +54,19 @@ ALTER TABLE child ADD CONSTRAINT fk_3 FOREIGN KEY (a1, a2)
 REFERENCES parent(a, b) ON DELETE CASCADE ON UPDATE CASCADE;
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_1	test/child	test/parent	1	6
+fk_1	test/child	test/parent	1	6
-test/fk_10	test/child	test/parent	2	5
+fk_10	test/child	test/parent	2	5
-test/fk_2	test/child	test/parent	2	5
+fk_2	test/child	test/parent	2	5
-test/fk_3	test/child	test/parent	2	5
+fk_3	test/child	test/parent	2	5
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_1	a2	b	0
+fk_1	a2	b	0
-test/fk_10	a1	a	0
+fk_10	a1	a	0
-test/fk_10	a2	b	1
+fk_10	a2	b	1
-test/fk_2	a1	a	0
+fk_2	a1	a	0
-test/fk_2	a2	b	1
+fk_2	a2	b	1
-test/fk_3	a1	a	0
+fk_3	a1	a	0
-test/fk_3	a2	b	1
+fk_3	a2	b	1
 SET foreign_key_checks = 1;
 INSERT INTO child VALUES(5,4);
 ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `fk_1` FOREIGN KEY (`a2`) REFERENCES `parent` (`b`) ON DELETE SET NULL ON UPDATE CASCADE)
@@ -98,22 +98,22 @@ ALGORITHM = INPLACE;
 SET DEBUG_DBUG = @saved_debug_dbug;
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_1	test/child	test/parent	1	6
+fk_1	test/child	test/parent	1	6
-test/fk_10	test/child	test/parent	2	5
+fk_10	test/child	test/parent	2	5
-test/fk_2	test/child	test/parent	2	5
+fk_2	test/child	test/parent	2	5
-test/fk_3	test/child	test/parent	2	5
+fk_3	test/child	test/parent	2	5
-test/fk_4	test/child	test/parent	2	5
+fk_4	test/child	test/parent	2	5
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_1	a2	b	0
+fk_1	a2	b	0
-test/fk_10	a1	a	0
+fk_10	a1	a	0
-test/fk_10	a2	b	1
+fk_10	a2	b	1
-test/fk_2	a1	a	0
+fk_2	a1	a	0
-test/fk_2	a2	b	1
+fk_2	a2	b	1
-test/fk_3	a1	a	0
+fk_3	a1	a	0
-test/fk_3	a2	b	1
+fk_3	a2	b	1
-test/fk_4	a1	a	0
+fk_4	a1	a	0
-test/fk_4	a2	b	1
+fk_4	a2	b	1
 SELECT t2.name, t1.name FROM information_schema.innodb_sys_columns t1, information_schema.innodb_sys_tables t2 WHERE t1.table_id = t2.table_id AND t2.name LIKE "%child" ORDER BY t1.name;
 name	name
 test/child	a1
@@ -148,22 +148,22 @@ Level	Code	Message
 Error	1821	Failed to add the foreign key constraint. Missing index for constraint 'fk_40' in the foreign table '#child'
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_1	test/child	test/parent	1	6
+fk_1	test/child	test/parent	1	6
-test/fk_10	test/child	test/parent	2	5
+fk_10	test/child	test/parent	2	5
-test/fk_2	test/child	test/parent	2	5
+fk_2	test/child	test/parent	2	5
-test/fk_3	test/child	test/parent	2	5
+fk_3	test/child	test/parent	2	5
-test/fk_4	test/child	test/parent	2	5
+fk_4	test/child	test/parent	2	5
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_1	a2	b	0
+fk_1	a2	b	0
-test/fk_10	a1	a	0
+fk_10	a1	a	0
-test/fk_10	a2	b	1
+fk_10	a2	b	1
-test/fk_2	a1	a	0
+fk_2	a1	a	0
-test/fk_2	a2	b	1
+fk_2	a2	b	1
-test/fk_3	a1	a	0
+fk_3	a1	a	0
-test/fk_3	a2	b	1
+fk_3	a2	b	1
-test/fk_4	a1	a	0
+fk_4	a1	a	0
-test/fk_4	a2	b	1
+fk_4	a2	b	1
 SET DEBUG_DBUG = '+d,innodb_test_no_reference_idx';
 ALTER TABLE child ADD CONSTRAINT fk_42 FOREIGN KEY (a1, a2)
 REFERENCES parent(a, b) ON DELETE CASCADE ON UPDATE CASCADE,
@@ -177,35 +177,35 @@ SET DEBUG_DBUG = '+d,innodb_test_wrong_fk_option';
 ALTER TABLE child ADD CONSTRAINT fk_42 FOREIGN KEY (a1, a2)
 REFERENCES parent(a, b) ON DELETE CASCADE ON UPDATE CASCADE,
 ALGORITHM = INPLACE;
-ERROR HY000: Failed to add the foreign key constraint on table 'child'. Incorrect options in FOREIGN KEY constraint 'test/fk_42'
+ERROR HY000: Failed to add the foreign key constraint on table 'child'. Incorrect options in FOREIGN KEY constraint 'fk_42'
 SET DEBUG_DBUG = @saved_debug_dbug;
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_1	test/child	test/parent	1	6
+fk_1	test/child	test/parent	1	6
-test/fk_10	test/child	test/parent	2	5
+fk_10	test/child	test/parent	2	5
-test/fk_2	test/child	test/parent	2	5
+fk_2	test/child	test/parent	2	5
-test/fk_3	test/child	test/parent	2	5
+fk_3	test/child	test/parent	2	5
-test/fk_4	test/child	test/parent	2	5
+fk_4	test/child	test/parent	2	5
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_1	a2	b	0
+fk_1	a2	b	0
-test/fk_10	a1	a	0
+fk_10	a1	a	0
-test/fk_10	a2	b	1
+fk_10	a2	b	1
-test/fk_2	a1	a	0
+fk_2	a1	a	0
-test/fk_2	a2	b	1
+fk_2	a2	b	1
-test/fk_3	a1	a	0
+fk_3	a1	a	0
-test/fk_3	a2	b	1
+fk_3	a2	b	1
-test/fk_4	a1	a	0
+fk_4	a1	a	0
-test/fk_4	a2	b	1
+fk_4	a2	b	1
 SET DEBUG_DBUG = '+d,innodb_test_cannot_add_fk_system';
 ALTER TABLE `#child` ADD CONSTRAINT fk_43 FOREIGN KEY (a1, a2)
 REFERENCES `#parent`(a, b) ON DELETE CASCADE ON UPDATE CASCADE,
 ALGORITHM = INPLACE;
-ERROR HY000: Failed to add the foreign key constraint 'test/fk_43' to system tables
+ERROR HY000: Failed to add the foreign key constraint 'test/@0023child' to system tables
 SET DEBUG_DBUG = @saved_debug_dbug;
 SHOW ERRORS;
 Level	Code	Message
-Error	1823	Failed to add the foreign key constraint 'test/fk_43' to system tables
+Error	1823	Failed to add the foreign key constraint 'test/@0023child' to system tables
 DROP TABLE `#child`;
 DROP TABLE `#parent`;
 SET foreign_key_checks = 0;
@@ -216,27 +216,27 @@ REFERENCES parent(a, b) ON DELETE CASCADE ON UPDATE CASCADE,
 ALGORITHM = INPLACE;
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_1	test/child	test/parent	1	6
+fk_1	test/child	test/parent	1	6
-test/fk_10	test/child	test/parent	2	5
+fk_10	test/child	test/parent	2	5
-test/fk_2	test/child	test/parent	2	5
+fk_2	test/child	test/parent	2	5
-test/fk_3	test/child	test/parent	2	5
+fk_3	test/child	test/parent	2	5
-test/fk_4	test/child	test/parent	2	5
+fk_4	test/child	test/parent	2	5
-test/fk_5	test/child	test/parent	1	6
+fk_5	test/child	test/parent	1	6
-test/fk_6	test/child	test/parent	2	5
+fk_6	test/child	test/parent	2	5
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_1	a2	b	0
+fk_1	a2	b	0
-test/fk_10	a1	a	0
+fk_10	a1	a	0
-test/fk_10	a2	b	1
+fk_10	a2	b	1
-test/fk_2	a1	a	0
+fk_2	a1	a	0
-test/fk_2	a2	b	1
+fk_2	a2	b	1
-test/fk_3	a1	a	0
+fk_3	a1	a	0
-test/fk_3	a2	b	1
+fk_3	a2	b	1
-test/fk_4	a1	a	0
+fk_4	a1	a	0
-test/fk_4	a2	b	1
+fk_4	a2	b	1
-test/fk_5	a2	b	0
+fk_5	a2	b	0
-test/fk_6	a1	a	0
+fk_6	a1	a	0
-test/fk_6	a2	b	1
+fk_6	a2	b	1
 DROP TABLE child;
 DROP TABLE parent;
 CREATE TABLE parent (a INT PRIMARY KEY, b INT NOT NULL) ENGINE = InnoDB;
@@ -261,10 +261,10 @@ child	CREATE TABLE `child` (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_4	test/child	test/parent	1	5
+fk_4	test/child	test/parent	1	5
 SELECT * FROM information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_4	a2	b	0
+fk_4	a2	b	0
 SET foreign_key_checks = 1;
 DROP TABLE child;
 DROP TABLE parent;
@@ -298,7 +298,7 @@ ALTER TABLE child ADD PRIMARY KEY idx (a3), CHANGE a1 a3 INT,
 ADD CONSTRAINT fk_1 FOREIGN KEY (a2) REFERENCES parent(b)
 ON DELETE SET NULL ON UPDATE CASCADE,
 ALGORITHM = INPLACE;
-ERROR HY000: Failed to add the foreign key constraint 'test/fk_1' to system tables
+ERROR HY000: Failed to add the foreign key constraint 'test/child' to system tables
 SET DEBUG_DBUG = @saved_debug_dbug;
 SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
@@ -326,10 +326,10 @@ Warnings:
 Warning	1280	Name 'idx' ignored for PRIMARY key.
 SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_1	test/child	test/parent	1	6
+fk_1	test/child	test/parent	1	6
 SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_1	a2	b	0
+fk_1	a2	b	0
 SELECT t2.name, t1.name FROM information_schema.innodb_sys_columns t1, information_schema.innodb_sys_tables t2 WHERE t1.table_id = t2.table_id AND t2.name LIKE "%child" ORDER BY t1.name;
 name	name
 test/child	a2
@@ -363,10 +363,10 @@ Warnings:
 Warning	1280	Name 'idx' ignored for PRIMARY key.
 SELECT * from information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_1	test/child	test/parent	1	6
+fk_1	test/child	test/parent	1	6
 SELECT * from information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_1	a2	b	0
+fk_1	a2	b	0
 SELECT t2.name, t1.name FROM information_schema.innodb_sys_columns t1, information_schema.innodb_sys_tables t2 WHERE t1.table_id = t2.table_id AND t2.name LIKE "%child" ORDER BY t1.name;
 name	name
 test/child	a1
@@ -398,10 +398,10 @@ ON DELETE SET NULL ON UPDATE CASCADE,
 ALGORITHM = INPLACE;
 SELECT * from information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_1	test/child	test/parent	1	6
+fk_1	test/child	test/parent	1	6
 SELECT * from information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_1	a3	b	0
+fk_1	a3	b	0
 SELECT t2.name, t1.name FROM information_schema.innodb_sys_columns t1, information_schema.innodb_sys_tables t2 WHERE t1.table_id = t2.table_id AND t2.name LIKE "%child" ORDER BY t1.name;
 name	name
 test/child	a2
@@ -430,7 +430,7 @@ ALTER TABLE child ADD PRIMARY KEY idx (a3), CHANGE a1 a3 INT,
 ADD CONSTRAINT fk_1 FOREIGN KEY (a3) REFERENCES parent(b)
 ON DELETE SET NULL ON UPDATE CASCADE,
 ALGORITHM = INPLACE;
-ERROR HY000: Failed to add the foreign key constraint on table 'child'. Incorrect options in FOREIGN KEY constraint 'test/fk_1'
+ERROR HY000: Failed to add the foreign key constraint on table 'child'. Incorrect options in FOREIGN KEY constraint 'fk_1'
 DROP TABLE parent;
 DROP TABLE child;
 CREATE TABLE parent (a INT PRIMARY KEY, b INT NOT NULL, c INT) ENGINE = InnoDB;
@@ -459,12 +459,12 @@ child	CREATE TABLE `child` (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 SELECT * from information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_a	test/child	test/parent	1	6
+fk_a	test/child	test/parent	1	6
-test/fk_b	test/child	test/parent	1	0
+fk_b	test/child	test/parent	1	0
 SELECT * from information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_a	a2_new	b	0
+fk_a	a2_new	b	0
-test/fk_b	a1_new	a	0
+fk_b	a1_new	a	0
 ALTER TABLE child
 ADD CONSTRAINT fk_new_1 FOREIGN KEY (a1_new) REFERENCES parent(b),
 ADD CONSTRAINT fk_new_2 FOREIGN KEY (a2_new) REFERENCES parent(a),
@@ -484,12 +484,12 @@ child	CREATE TABLE `child` (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 SELECT * from information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_a	test/child	test/parent	1	6
+fk_a	test/child	test/parent	1	6
-test/fk_b	test/child	test/parent	1	0
+fk_b	test/child	test/parent	1	0
 SELECT * from information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_a	a2_new	b	0
+fk_a	a2_new	b	0
-test/fk_b	a1_new	a	0
+fk_b	a1_new	a	0
 ALTER TABLE child
 ADD CONSTRAINT fk_new_1 FOREIGN KEY (a1_new) REFERENCES parent(b),
 ADD CONSTRAINT fk_new_2 FOREIGN KEY (a2_new) REFERENCES parent(a),
@@ -512,18 +512,18 @@ child	CREATE TABLE `child` (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 SELECT * from information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_a	test/child	test/parent	1	6
+fk_a	test/child	test/parent	1	6
-test/fk_b	test/child	test/parent	1	0
+fk_b	test/child	test/parent	1	0
-test/fk_new_1	test/child	test/parent	1	0
+fk_new_1	test/child	test/parent	1	0
-test/fk_new_2	test/child	test/parent	1	0
+fk_new_2	test/child	test/parent	1	0
-test/fk_new_3	test/child	test/parent	1	0
+fk_new_3	test/child	test/parent	1	0
 SELECT * from information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_a	a2_new	b	0
+fk_a	a2_new	b	0
-test/fk_b	a1_new	a	0
+fk_b	a1_new	a	0
-test/fk_new_1	a1_new	b	0
+fk_new_1	a1_new	b	0
-test/fk_new_2	a2_new	a	0
+fk_new_2	a2_new	a	0
-test/fk_new_3	a3	a	0
+fk_new_3	a3	a	0
 DROP TABLE child;
 CREATE TABLE child (a1 INT NOT NULL, a2 INT, a3 INT) ENGINE = InnoDB;
 CREATE INDEX tb ON child(a2);
@@ -567,14 +567,14 @@ child	CREATE TABLE `child` (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 SELECT * from information_schema.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/fk_new_1	test/child	test/parent	1	0
+fk_new_1	test/child	test/parent	1	0
-test/fk_new_2	test/child	test/parent	1	0
+fk_new_2	test/child	test/parent	1	0
-test/fk_new_3	test/child	test/parent	1	0
+fk_new_3	test/child	test/parent	1	0
 SELECT * from information_schema.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk_new_1	a1	b	0
+fk_new_1	a1	b	0
-test/fk_new_2	a2	a	0
+fk_new_2	a2	a	0
-test/fk_new_3	a3	a	0
+fk_new_3	a3	a	0
 SET foreign_key_checks = 1;
 DROP TABLE child;
 DROP TABLE parent;
@@ -597,15 +597,16 @@ CREATE INDEX idx ON t3(a);
 ALTER TABLE `t2` ADD CONSTRAINT `fw` FOREIGN KEY (`c`) REFERENCES t3 (a);
 ALTER TABLE `t2` ADD CONSTRAINT `e` foreign key (`d`) REFERENCES t3(a);
 ALTER TABLE `t3` ADD CONSTRAINT `e` foreign key (`c`) REFERENCES `t2`(`c`) ON UPDATE SET NULL;
-ERROR HY000: Failed to add the foreign key constraint 'test/e' to system tables
 SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/e	test/t2	test/t3	1	0
+e	test/t2	test/t3	1	0
-test/fw	test/t2	test/t3	1	0
+fw	test/t2	test/t3	1	0
+e	test/t3	test/t2	1	8
 SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/e	d	a	0
+e	d	a	0
-test/fw	c	a	0
+fw	c	a	0
+e	c	c	0
 DROP TABLE t2;
 DROP TABLE t3;
 # Bug #17449901	 TABLE DISAPPEARS WHEN ALTERING
@@ -625,7 +626,7 @@ Table	Create Table
 t2	CREATE TABLE `t2` (
   `f2` int(11) DEFAULT NULL,
   `f3` int(11) DEFAULT NULL,
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`)
+  CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 drop table t2;
 drop table t1;
@@ -640,7 +641,7 @@ t2	CREATE TABLE `t2` (
   `f2` int(11) DEFAULT NULL,
   `f3` int(11) DEFAULT NULL,
   KEY `t1` (`f2`,`f3`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`)
+  CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 drop table t2;
 drop table t1;
@@ -655,7 +656,7 @@ Table	Create Table
 t1	CREATE TABLE `t1` (
   `f1` int(11) DEFAULT NULL,
   KEY `f1` (`f1`),
-  CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f1`)
+  CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f1`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 DROP TABLE t1;
 CREATE TABLE t1(f1 INT, KEY(f1),
@@ -665,13 +666,13 @@ Table	Create Table
 t1	CREATE TABLE `t1` (
   `f1` int(11) DEFAULT NULL,
   KEY `f1` (`f1`),
-  CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f1`)
+  CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f1`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 ALTER TABLE t1 DROP KEY f1;
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
   `f1` int(11) DEFAULT NULL,
-  CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f1`)
+  CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f1`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 DROP TABLE t1;

mysql-test/suite/innodb/r/innodb-index.result

@@ -456,21 +456,21 @@ ERROR HY000: Cannot drop index 'b': needed in a foreign key constraint
 alter table t2 drop index b, drop index c, drop index d;
 ERROR HY000: Cannot drop index 'b': needed in a foreign key constraint
 alter table t2 MODIFY b INT NOT NULL, ALGORITHM=COPY;
-ERROR HY000: Column 'b' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+ERROR HY000: Column 'b' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 set @old_sql_mode = @@sql_mode;
 set @@sql_mode = 'STRICT_TRANS_TABLES';
 alter table t2 MODIFY b INT NOT NULL, ALGORITHM=INPLACE;
-ERROR HY000: Column 'b' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+ERROR HY000: Column 'b' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 set @@sql_mode = @old_sql_mode;
 SET FOREIGN_KEY_CHECKS=0;
 alter table t2 DROP COLUMN b, ALGORITHM=COPY;
-ERROR HY000: Cannot drop column 'b': needed in a foreign key constraint 't2_ibfk_1'
+ERROR HY000: Cannot drop column 'b': needed in a foreign key constraint '1'
 alter table t2 DROP COLUMN b;
-ERROR HY000: Cannot drop column 'b': needed in a foreign key constraint 'test/t2_ibfk_1'
+ERROR HY000: Cannot drop column 'b': needed in a foreign key constraint '1'
 alter table t1 DROP COLUMN b, ALGORITHM=COPY;
-ERROR HY000: Cannot drop column 'b': needed in a foreign key constraint 't2_ibfk_1' of table `test`.`t2`
+ERROR HY000: Cannot drop column 'b': needed in a foreign key constraint '1' of table `test`.`t2`
 alter table t1 DROP COLUMN b;
-ERROR HY000: Cannot drop column 'b': needed in a foreign key constraint 'test/t2_ibfk_1' of table `test`.`t2`
+ERROR HY000: Cannot drop column 'b': needed in a foreign key constraint 'test/t2' of table `test`.`t2`
 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
 create unique index dc on t2 (d,c);
 affected rows: 0
@@ -481,10 +481,10 @@ info: Records: 0  Duplicates: 0  Warnings: 0
 set @@sql_mode = 'STRICT_TRANS_TABLES';
 alter table t2 add primary key (alpha), change a alpha int,
 change b beta int not null, change c charlie int not null;
-ERROR HY000: Column 'b' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+ERROR HY000: Column 'b' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 alter table t2 add primary key (alpha), change a alpha int,
 change c charlie int not null, change d delta int not null;
-ERROR HY000: Column 'd' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_3' SET NULL
+ERROR HY000: Column 'd' cannot be NOT NULL: needed in a foreign key constraint '3' SET NULL
 alter table t2 add primary key (alpha), change a alpha int,
 change b beta int, modify c int not null;
 affected rows: 0
@@ -509,11 +509,8 @@ t4	CREATE TABLE `t4` (
   CONSTRAINT `dc` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 alter table t3 add constraint dc foreign key (a) references t1(a);
-ERROR HY000: Can't create table `test`.`t3` (errno: 121 "Duplicate key on write or update")
+alter table t3 drop foreign key dc;
-SET FOREIGN_KEY_CHECKS=0;
 alter table t3 add constraint dc foreign key (a) references t1(a);
-ERROR HY000: Failed to add the foreign key constraint 'test/dc' to system tables
-SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
 show create table t3;
 Table	Create Table
 t3	CREATE TABLE `t3` (
@@ -521,7 +518,8 @@ t3	CREATE TABLE `t3` (
   `c` int(11) NOT NULL,
   `d` int(11) DEFAULT NULL,
   PRIMARY KEY (`a`),
-  KEY `c` (`c`)
+  KEY `c` (`c`),
+  CONSTRAINT `dc` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 alter table t2 drop index b, add index (beta);
 affected rows: 0
@@ -538,16 +536,17 @@ t2	CREATE TABLE `t2` (
   UNIQUE KEY `dc` (`d`,`c`),
   KEY `c` (`c`),
   KEY `beta` (`beta`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`beta`) REFERENCES `t1` (`b`) ON DELETE SET NULL,
+  CONSTRAINT `1` FOREIGN KEY (`beta`) REFERENCES `t1` (`b`) ON DELETE SET NULL,
-  CONSTRAINT `t2_ibfk_2` FOREIGN KEY (`c`) REFERENCES `t3` (`c`),
+  CONSTRAINT `2` FOREIGN KEY (`c`) REFERENCES `t3` (`c`),
-  CONSTRAINT `t2_ibfk_3` FOREIGN KEY (`d`) REFERENCES `t4` (`d`) ON UPDATE SET NULL
+  CONSTRAINT `3` FOREIGN KEY (`d`) REFERENCES `t4` (`d`) ON UPDATE SET NULL
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 delete from t1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `dc` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t3`, CONSTRAINT `dc` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 drop index dc on t4;
 ERROR 42000: Can't DROP INDEX `dc`; check that it exists
 alter table t3 drop foreign key dc;
-ERROR 42000: Can't DROP FOREIGN KEY `dc`; check that it exists
+affected rows: 0
+info: Records: 0  Duplicates: 0  Warnings: 0
 alter table t4 drop foreign key dc;
 affected rows: 0
 info: Records: 0  Duplicates: 0  Warnings: 0
@@ -968,7 +967,7 @@ FOREIGN KEY (c3,c2) REFERENCES t1(c1,c2);
 ERROR HY000: Failed to add the foreign key constraint. Missing index for constraint 'fk_t2_ca' in the referenced table 't1'
 ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
 FOREIGN KEY (c3,c2) REFERENCES t1(c2,c1), ALGORITHM=INPLACE;
-ERROR HY000: Failed to add the foreign key constraint on table 't2'. Incorrect options in FOREIGN KEY constraint 'test/fk_t2_ca'
+ERROR HY000: Failed to add the foreign key constraint on table 't2'. Incorrect options in FOREIGN KEY constraint 'fk_t2_ca'
 ALTER TABLE t2 ADD CONSTRAINT fk_t2_ca
 FOREIGN KEY (c3,c2) REFERENCES t1(c2,c1), ALGORITHM=COPY;
 ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint is incorrectly formed")

mysql-test/suite/innodb/r/innodb-system-table-view.result

@@ -98,10 +98,10 @@ FOREIGN KEY (parent_id) REFERENCES parent(id)
 ON DELETE CASCADE) ENGINE=INNODB;
 SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/constraint_test	test/child	test/parent	1	1
+constraint_test	test/child	test/parent	1	1
 SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/constraint_test	parent_id	id	0
+constraint_test	parent_id	id	0
 INSERT INTO parent VALUES(1);
 InnoDB		0 transactions not purged
 SELECT name, num_rows, ref_count
@@ -154,11 +154,11 @@ FOREIGN KEY (id, parent_id) REFERENCES parent(id, newid)
 ON DELETE CASCADE) ENGINE=INNODB;
 SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN;
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE
-test/constraint_test	test/child	test/parent	2	1
+constraint_test	test/child	test/parent	2	1
 SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/constraint_test	id	id	0
+constraint_test	id	id	0
-test/constraint_test	parent_id	newid	1
+constraint_test	parent_id	newid	1
 INSERT INTO parent VALUES(1, 9);
 SELECT * FROM parent WHERE id IN (SELECT id FROM parent);
 id	newid

mysql-test/suite/innodb/r/innodb-truncate.result

@@ -7,7 +7,7 @@
 CREATE TABLE t1 (pk INT PRIMARY KEY) ENGINE=INNODB;
 CREATE TABLE t2 (fk INT NOT NULL, FOREIGN KEY (fk) REFERENCES t1 (pk)) ENGINE=INNODB;
 TRUNCATE TABLE t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fk`) REFERENCES `test`.`t1` (`pk`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`fk`) REFERENCES `test`.`t1` (`pk`))
 # Truncation of child should succeed.
 TRUNCATE TABLE t2;
 DROP TABLE t2;
@@ -32,7 +32,7 @@ TRUNCATE TABLE t2;
 TRUNCATE TABLE t3;
 SET @@SESSION.foreign_key_checks = 1;
 TRUNCATE TABLE t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fk`) REFERENCES `test`.`t1` (`pk`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`fk`) REFERENCES `test`.`t1` (`pk`))
 TRUNCATE TABLE t2;
 TRUNCATE TABLE t3;
 LOCK TABLES t1 WRITE;
@@ -40,7 +40,7 @@ SET @@SESSION.foreign_key_checks = 0;
 TRUNCATE TABLE t1;
 SET @@SESSION.foreign_key_checks = 1;
 TRUNCATE TABLE t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fk`) REFERENCES `test`.`t1` (`pk`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`fk`) REFERENCES `test`.`t1` (`pk`))
 UNLOCK TABLES;
 DROP TABLE t3,t2,t1;
 SET @@SESSION.foreign_key_checks = @old_foreign_key_checks;
@@ -88,7 +88,7 @@ ERROR HY000: Can't create table `test`.`t3` (errno: 150 "Foreign key constraint
 ALTER TABLE t1 RENAME TO t3;
 ALTER TABLE t3 FORCE;
 TRUNCATE TABLE t3;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `test`.`t3` (`f2`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `test`.`t3` (`f2`))
 DROP TABLE t2, t3;
 #
 # MDEV-24861 Assertion `trx->rsegs.m_redo.rseg' failed

mysql-test/suite/innodb/r/innodb-wl5522-1.result

@@ -279,7 +279,7 @@ col_1_int	col_2_varchar
 2	a2
 3	a3
 INSERT INTO testdb_wl5522.t1_fk VALUES (100,'a100');
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`testdb_wl5522`.`t1_fk`, CONSTRAINT `t1_fk_ibfk_1` FOREIGN KEY (`col_2_varchar`) REFERENCES `t1` (`col_2_varchar`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`testdb_wl5522`.`t1_fk`, CONSTRAINT `1` FOREIGN KEY (`col_2_varchar`) REFERENCES `t1` (`col_2_varchar`))
 SET AUTOCOMMIT = 0;
 INSERT INTO testdb_wl5522.t1_fk VALUES (4,'a4'),(5,'a5');
 ROLLBACK;

mysql-test/suite/innodb/r/innodb-wl5980-alter.result

@@ -25,8 +25,8 @@ WHERE FOR_NAME LIKE 'test/t%';
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c2	0
+t1c2	c2	c2	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
 FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
 INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
@@ -42,8 +42,8 @@ c2	0	c2
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c2	0
+t1c2	c2	c2	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -95,8 +95,8 @@ c2	0	c2
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c2	0
+t1c2	c2	c2	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1 CHANGE c2 c2 INT AFTER c1;
 ALTER TABLE t1 CHANGE c1 c1 INT FIRST;
 ### files in MYSQL_DATA_DIR/test
@@ -131,8 +131,8 @@ c2	0	c2
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c2	0
+t1c2	c2	c2	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1 CHANGE C2 c3 INT;
 ### files in MYSQL_DATA_DIR/test
 db.opt
@@ -166,8 +166,8 @@ c2	0	c3
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c3	0
+t1c2	c2	c3	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1 CHANGE c3 C INT;
 ### files in MYSQL_DATA_DIR/test
 db.opt
@@ -201,8 +201,8 @@ c2	0	C
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	C	0
+t1c2	c2	C	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1 CHANGE C Cöŀumň_TWO INT;
 ### files in MYSQL_DATA_DIR/test
 db.opt
@@ -224,8 +224,8 @@ t1c.ibd
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	Cöŀumň_TWO	0
+t1c2	c2	Cöŀumň_TWO	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 SELECT i.NAME,i.POS,i.MTYPE,i.PRTYPE,i.LEN
 FROM INFORMATION_SCHEMA.INNODB_SYS_COLUMNS i
 INNER JOIN sys_tables st ON i.TABLE_ID=st.TABLE_ID;
@@ -241,8 +241,8 @@ c2	0	Cöŀumň_TWO
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	Cöŀumň_TWO	0
+t1c2	c2	Cöŀumň_TWO	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1 CHANGE cöĿǖmň_two c3 INT;
 ERROR 42S22: Unknown column 'cöĿǖmň_two' in 't1'
 ALTER TABLE t1 CHANGE cÖĿUMŇ_two c3 INT, RENAME TO t3;
@@ -442,8 +442,8 @@ c2	0	c3
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c3	0
+t1c2	c2	c3	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1 DROP INDEX c2;
 ERROR HY000: Cannot drop index 'c2': needed in a foreign key constraint
 ALTER TABLE t1 DROP INDEX c4;
@@ -515,8 +515,8 @@ c2	0	c3
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c3	0
+t1c2	c2	c3	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 CREATE TABLE t1p (c1 INT PRIMARY KEY, c2 INT, INDEX(c2))
 ENGINE=InnoDB DATA DIRECTORY='MYSQL_TMP_DIR/alt_dir';
 ALTER TABLE t1c DROP INDEX C2, DROP INDEX C3;
@@ -570,8 +570,8 @@ c2	0	c3
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c3	0
+t1c2	c2	c3	0
-test/t1c3	c3	c2	0
+t1c3	c3	c2	0
 ALTER TABLE t1c DROP FOREIGN KEY t1C3;
 ### files in MYSQL_DATA_DIR/test
 db.opt
@@ -616,7 +616,7 @@ c2	0	c3
 SELECT i.* FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN_COLS i
 INNER JOIN sys_foreign sf ON i.ID = sf.ID;
 ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/t1c2	c2	c3	0
+t1c2	c2	c3	0
 ALTER TABLE t1c DROP INDEX c2, DROP FOREIGN KEY t1C2;
 ### files in MYSQL_DATA_DIR/test
 db.opt

mysql-test/suite/innodb/r/innodb.result

@@ -1580,7 +1580,7 @@ t2	CREATE TABLE `t2` (
   PRIMARY KEY (`a`),
   UNIQUE KEY `b_2` (`b`),
   KEY `b` (`b`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`id`)
+  CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 drop table t2;
 create table t2 (a int auto_increment primary key, b int, foreign key (b) references t1(id), foreign key (b) references t1(id), unique(b)) engine=innodb;
@@ -1591,8 +1591,8 @@ t2	CREATE TABLE `t2` (
   `b` int(11) DEFAULT NULL,
   PRIMARY KEY (`a`),
   UNIQUE KEY `b` (`b`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`id`),
+  CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`id`),
-  CONSTRAINT `t2_ibfk_2` FOREIGN KEY (`b`) REFERENCES `t1` (`id`)
+  CONSTRAINT `2` FOREIGN KEY (`b`) REFERENCES `t1` (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 drop table t2, t1;
 create table t1 (c char(10), index (c,c)) engine=innodb;
@@ -2413,7 +2413,7 @@ SELECT * FROM t1;
 id
 1
 TRUNCATE t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`id`) REFERENCES `test`.`t1` (`id`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`id`) REFERENCES `test`.`t1` (`id`))
 INSERT INTO t1 (id) VALUES (NULL);
 SELECT * FROM t1;
 id
@@ -2421,7 +2421,7 @@ id
 2
 DELETE FROM t1;
 TRUNCATE t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`id`) REFERENCES `test`.`t1` (`id`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`id`) REFERENCES `test`.`t1` (`id`))
 INSERT INTO t1 (id) VALUES (NULL);
 SELECT * FROM t1;
 id
@@ -2539,12 +2539,12 @@ create table t2 (a int primary key, b int, foreign key (b) references t1(a)) eng
 create table t1(a char(10) primary key, b varchar(20)) engine = innodb;
 set foreign_key_checks=1;
 insert into t2 values (1,1);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`))
 set foreign_key_checks=0;
 drop table t1;
 set foreign_key_checks=1;
 insert into t2 values (1,1);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`))
 create table t1(a char(10) primary key, b varchar(20)) engine = innodb;
 ERROR HY000: Can't create table `test`.`t1` (errno: 150 "Foreign key constraint is incorrectly formed")
 drop table t2;
@@ -2560,14 +2560,14 @@ set foreign_key_checks=0;
 create table t2 (a varchar(10), foreign key (a) references t1(a)) engine = innodb;
 create table t1(a varchar(10) primary key) engine = innodb;
 alter table t1 modify column a int;
-ERROR HY000: Cannot change column 'a': used in a foreign key constraint 't2_ibfk_1' of table 'test.t2'
+ERROR HY000: Cannot change column 'a': used in a foreign key constraint '1' of table 'test.t2'
 set foreign_key_checks=1;
 drop table t2,t1;
 set foreign_key_checks=0;
 create table t2 (a varchar(10), foreign key (a) references t1(a)) engine = innodb DEFAULT CHARSET=latin1;
 create table t1(a varchar(10) primary key) engine = innodb DEFAULT CHARSET=latin1;
 alter table t1 convert to character set utf8;
-ERROR HY000: Cannot change column 'a': used in a foreign key constraint 't2_ibfk_1' of table 'test.t2'
+ERROR HY000: Cannot change column 'a': used in a foreign key constraint '1' of table 'test.t2'
 set foreign_key_checks=1;
 drop table t2,t1;
 call mtr.add_suppression("\\[Warning\\] InnoDB: In ALTER TABLE `test`.`t1` has or is referenced in foreign key constraints which are not compatible with the new table definition.");
@@ -2585,29 +2585,29 @@ create table t4(a int primary key,constraint foreign key(a)references t3(a)) row
 insert into t1 values(1);
 insert into t3 values(1);
 insert into t2 values(2);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 insert into t4 values(2);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `t4_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t3` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t3` (`a`))
 insert into t2 values(1);
 insert into t4 values(1);
 update t1 set a=2;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 update t2 set a=2;
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 update t3 set a=2;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `t4_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t3` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t3` (`a`))
 update t4 set a=2;
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `t4_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t3` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t3` (`a`))
 truncate t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`))
 truncate t3;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t4`, CONSTRAINT `t4_ibfk_1` FOREIGN KEY (`a`) REFERENCES `test`.`t3` (`a`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t4`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `test`.`t3` (`a`))
 truncate t2;
 truncate t4;
 truncate t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`))
 truncate t3;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t4`, CONSTRAINT `t4_ibfk_1` FOREIGN KEY (`a`) REFERENCES `test`.`t3` (`a`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t4`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `test`.`t3` (`a`))
 drop table t4,t3,t2,t1;
 create table t1 (a varchar(255) character set utf8,
 b varchar(255) character set utf8,
@@ -2728,14 +2728,14 @@ drop table t2,t1;
 CREATE TABLE t1(a INT, PRIMARY KEY(a)) ENGINE=InnoDB;
 CREATE TABLE t2(a INT) ENGINE=InnoDB;
 ALTER TABLE t2 ADD FOREIGN KEY (a) REFERENCES t1(a);
-ALTER TABLE t2 DROP FOREIGN KEY t2_ibfk_1;
+ALTER TABLE t2 DROP FOREIGN KEY `1`;
-ALTER TABLE t2 ADD CONSTRAINT t2_ibfk_0 FOREIGN KEY (a) REFERENCES t1(a);
+ALTER TABLE t2 ADD CONSTRAINT `0` FOREIGN KEY (a) REFERENCES t1(a);
-ALTER TABLE t2 DROP FOREIGN KEY t2_ibfk_0;
+ALTER TABLE t2 DROP FOREIGN KEY `0`;
 SHOW CREATE TABLE t2;
 Table	Create Table
 t2	CREATE TABLE `t2` (
   `a` int(11) DEFAULT NULL,
-  KEY `t2_ibfk_0` (`a`)
+  KEY `0` (`a`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 DROP TABLE t2,t1;
 SET sql_mode = default;
@@ -3061,7 +3061,7 @@ t2	CREATE TABLE `t2` (
   `f` int(11) NOT NULL,
   PRIMARY KEY (`id`),
   KEY `f` (`f`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f`) REFERENCES `t1` (`f`) ON DELETE CASCADE ON UPDATE CASCADE,
+  CONSTRAINT `1` FOREIGN KEY (`f`) REFERENCES `t1` (`f`) ON DELETE CASCADE ON UPDATE CASCADE,
   CONSTRAINT `t2_t1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 DROP TABLE t2, t1;
@@ -3073,7 +3073,7 @@ ALTER TABLE t2 ADD FOREIGN KEY (a) REFERENCES t1 (a) ON DELETE SET NULL;
 set @old_sql_mode = @@sql_mode;
 set @@sql_mode = 'STRICT_TRANS_TABLES';
 ALTER TABLE t2 MODIFY a INT NOT NULL;
-ERROR HY000: Column 'a' cannot be NOT NULL: needed in a foreign key constraint 't2_ibfk_1' SET NULL
+ERROR HY000: Column 'a' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
 set @@sql_mode = @old_sql_mode;
 DELETE FROM t1;
 DROP TABLE t2,t1;

mysql-test/suite/innodb/r/innodb_bug21704.result

@@ -82,8 +82,8 @@ INNER JOIN INFORMATION_SCHEMA.INNODB_SYS_FOREIGN f
 ON c.ID=f.ID
 WHERE FOR_NAME LIKE 'test/t%';
 ID	FOR_NAME	REF_NAME	N_COLS	TYPE	ID	FOR_COL_NAME	REF_COL_NAME	POS
-test/fk1	test/t2	test/t1	1	0	test/fk1	z	e	0
+fk1	test/t2	test/t1	1	0	fk1	z	e	0
-test/fk2	test/t3	test/t3	1	0	test/fk2	g	f	0
+fk2	test/t3	test/t3	1	0	fk2	g	f	0
 DROP TABLE t3;
 DROP TABLE t2;
 DROP TABLE t1;

mysql-test/suite/innodb/r/innodb_bug57904.result

@@ -17,7 +17,7 @@ SELECT * FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS
 WHERE table_name = 'product_order';
 CONSTRAINT_CATALOG	def
 CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	product_order_ibfk_1
+CONSTRAINT_NAME	1
 UNIQUE_CONSTRAINT_CATALOG	def
 UNIQUE_CONSTRAINT_SCHEMA	test
 UNIQUE_CONSTRAINT_NAME	PRIMARY
@@ -28,7 +28,7 @@ TABLE_NAME	product_order
 REFERENCED_TABLE_NAME	product
 CONSTRAINT_CATALOG	def
 CONSTRAINT_SCHEMA	test
-CONSTRAINT_NAME	product_order_ibfk_2
+CONSTRAINT_NAME	2
 UNIQUE_CONSTRAINT_CATALOG	def
 UNIQUE_CONSTRAINT_SCHEMA	test
 UNIQUE_CONSTRAINT_NAME	PRIMARY

mysql-test/suite/innodb/r/innodb_mysql.result

@@ -322,7 +322,7 @@ INSERT INTO t1 VALUES (1);
 INSERT INTO t2 VALUES (1);
 DELETE IGNORE FROM t1 WHERE i = 1;
 Warnings:
-Warning	1451	Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`i`) REFERENCES `t1` (`i`) ON DELETE NO ACTION)
+Warning	1451	Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`i`) REFERENCES `t1` (`i`) ON DELETE NO ACTION)
 SELECT * FROM t1, t2;
 i	i
 1	1
@@ -2126,10 +2126,10 @@ t2	CREATE TABLE `t2` (
   `c` int(11) NOT NULL,
   `d` int(11) NOT NULL,
   PRIMARY KEY (`c`,`d`),
+  CONSTRAINT `1` FOREIGN KEY (`c`) REFERENCES `t1` (`a`) ON UPDATE NO ACTION,
   CONSTRAINT `c1` FOREIGN KEY (`c`) REFERENCES `t1` (`a`) ON DELETE NO ACTION,
   CONSTRAINT `c2` FOREIGN KEY (`c`) REFERENCES `t1` (`a`) ON UPDATE NO ACTION,
-  CONSTRAINT `f3` FOREIGN KEY (`c`) REFERENCES `t1` (`a`) ON UPDATE NO ACTION,
+  CONSTRAINT `f3` FOREIGN KEY (`c`) REFERENCES `t1` (`a`) ON UPDATE NO ACTION
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`c`) REFERENCES `t1` (`a`) ON UPDATE NO ACTION
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 DROP TABLE t2;
 DROP TABLE t1;
@@ -2445,7 +2445,7 @@ INSERT INTO t2 VALUES (3,2);
 SET AUTOCOMMIT = 0;
 START TRANSACTION;
 TRUNCATE TABLE t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`t1_id`) REFERENCES `test`.`t1` (`id`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`t1_id`) REFERENCES `test`.`t1` (`id`))
 SELECT * FROM t1;
 id
 1
@@ -2457,7 +2457,7 @@ id
 2
 START TRANSACTION;
 TRUNCATE TABLE t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`t1_id`) REFERENCES `test`.`t1` (`id`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`t1_id`) REFERENCES `test`.`t1` (`id`))
 SELECT * FROM t1;
 id
 1
@@ -2475,7 +2475,7 @@ id
 2
 COMMIT;
 TRUNCATE TABLE t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`t1_id`) REFERENCES `test`.`t1` (`id`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`t1_id`) REFERENCES `test`.`t1` (`id`))
 SELECT * FROM t1;
 id
 1
@@ -2487,7 +2487,7 @@ id
 1
 2
 TRUNCATE TABLE t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`t1_id`) REFERENCES `test`.`t1` (`id`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`t1_id`) REFERENCES `test`.`t1` (`id`))
 ROLLBACK;
 SELECT * FROM t1;
 id
@@ -2526,9 +2526,9 @@ INSERT INTO t4 VALUES (1),(2),(3),(4),(5);
 INSERT INTO t5 VALUES (1);
 DELETE t5 FROM t4 LEFT JOIN t5 ON t4.a= t5.a;
 DELETE t2, t1 FROM t2 INNER JOIN t1 ON (t2.aid = t1.id) WHERE t2.id = 1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t3`, CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`bid`) REFERENCES `t2` (`id`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t3`, CONSTRAINT `1` FOREIGN KEY (`bid`) REFERENCES `t2` (`id`))
 DELETE t2, t1 FROM t2 INNER JOIN t1 ON (t2.aid = t1.id) WHERE t2.id = 1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t3`, CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`bid`) REFERENCES `t2` (`id`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t3`, CONSTRAINT `1` FOREIGN KEY (`bid`) REFERENCES `t2` (`id`))
 DELETE IGNORE t2, t1 FROM t2 INNER JOIN t1 ON (t2.aid = t1.id) WHERE t2.id = 1;
 DROP TABLE t3;
 DROP TABLE t2;
@@ -2627,7 +2627,7 @@ END||
 SET @a:=0;
 ** Errors in the trigger causes the statement to abort.
 DELETE IGNORE t1 FROM t3 LEFT JOIN t1 ON t1.i=t3.i;
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `t4_ibfk_1` FOREIGN KEY (`t1i`) REFERENCES `t1` (`i`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t4`, CONSTRAINT `1` FOREIGN KEY (`t1i`) REFERENCES `t1` (`i`))
 SELECT * FROM t1 LEFT JOIN t3 ON t1.i=t3.i;
 i	i
 1	1

mysql-test/suite/innodb/r/instant_alter.result

@@ -468,7 +468,7 @@ CREATE TABLE t2 (b INT PRIMARY KEY, FOREIGN KEY(b) REFERENCES t1(a))
 ENGINE=InnoDB ROW_FORMAT=REDUNDANT;
 INSERT INTO t1 SET a=1;
 INSERT INTO t2 SET b=1;
-ALTER TABLE t2 ADD COLUMN a INT, DROP FOREIGN KEY t2_ibfk_1;
+ALTER TABLE t2 ADD COLUMN a INT, DROP FOREIGN KEY `1`;
 ALTER TABLE t2 ADD INDEX(a);
 ALTER TABLE t1 ADD COLUMN b INT, ADD FOREIGN KEY(a) REFERENCES t2(a),
 ALGORITHM=INSTANT;
@@ -480,7 +480,7 @@ ALTER TABLE t2 ADD CONSTRAINT fk FOREIGN KEY(b) REFERENCES t1(a),
 ALGORITHM=INSTANT;
 SET foreign_key_checks=1;
 ALTER TABLE t2 COMMENT 'domestic keys only', DROP FOREIGN KEY fk;
-ALTER TABLE t1 DROP FOREIGN KEY t1_ibfk_1;
+ALTER TABLE t1 DROP FOREIGN KEY `1`;
 ALTER TABLE t1 ADD COLUMN big BLOB NOT NULL
 DEFAULT REPEAT('a', @@GLOBAL.innodb_page_size * .75);
 CHECK TABLE t2, t1;
@@ -1402,7 +1402,7 @@ CREATE TABLE t2 (b INT PRIMARY KEY, FOREIGN KEY(b) REFERENCES t1(a))
 ENGINE=InnoDB ROW_FORMAT=COMPACT;
 INSERT INTO t1 SET a=1;
 INSERT INTO t2 SET b=1;
-ALTER TABLE t2 ADD COLUMN a INT, DROP FOREIGN KEY t2_ibfk_1;
+ALTER TABLE t2 ADD COLUMN a INT, DROP FOREIGN KEY `1`;
 ALTER TABLE t2 ADD INDEX(a);
 ALTER TABLE t1 ADD COLUMN b INT, ADD FOREIGN KEY(a) REFERENCES t2(a),
 ALGORITHM=INSTANT;
@@ -1414,7 +1414,7 @@ ALTER TABLE t2 ADD CONSTRAINT fk FOREIGN KEY(b) REFERENCES t1(a),
 ALGORITHM=INSTANT;
 SET foreign_key_checks=1;
 ALTER TABLE t2 COMMENT 'domestic keys only', DROP FOREIGN KEY fk;
-ALTER TABLE t1 DROP FOREIGN KEY t1_ibfk_1;
+ALTER TABLE t1 DROP FOREIGN KEY `1`;
 ALTER TABLE t1 ADD COLUMN big BLOB NOT NULL
 DEFAULT REPEAT('a', @@GLOBAL.innodb_page_size * .75);
 CHECK TABLE t2, t1;
@@ -2336,7 +2336,7 @@ CREATE TABLE t2 (b INT PRIMARY KEY, FOREIGN KEY(b) REFERENCES t1(a))
 ENGINE=InnoDB ROW_FORMAT=DYNAMIC;
 INSERT INTO t1 SET a=1;
 INSERT INTO t2 SET b=1;
-ALTER TABLE t2 ADD COLUMN a INT, DROP FOREIGN KEY t2_ibfk_1;
+ALTER TABLE t2 ADD COLUMN a INT, DROP FOREIGN KEY `1`;
 ALTER TABLE t2 ADD INDEX(a);
 ALTER TABLE t1 ADD COLUMN b INT, ADD FOREIGN KEY(a) REFERENCES t2(a),
 ALGORITHM=INSTANT;
@@ -2348,7 +2348,7 @@ ALTER TABLE t2 ADD CONSTRAINT fk FOREIGN KEY(b) REFERENCES t1(a),
 ALGORITHM=INSTANT;
 SET foreign_key_checks=1;
 ALTER TABLE t2 COMMENT 'domestic keys only', DROP FOREIGN KEY fk;
-ALTER TABLE t1 DROP FOREIGN KEY t1_ibfk_1;
+ALTER TABLE t1 DROP FOREIGN KEY `1`;
 ALTER TABLE t1 ADD COLUMN big BLOB NOT NULL
 DEFAULT REPEAT('a', @@GLOBAL.innodb_page_size * .75);
 CHECK TABLE t2, t1;
@@ -2913,20 +2913,19 @@ CREATE TABLE t2 (f1 INT, f2 INT, PRIMARY KEY(f1),
 FOREIGN KEY fk (f2) REFERENCES t2(f1)
 )ENGINE=InnoDB;
 ALTER TABLE t1 ADD f5 INT;
-SET FOREIGN_KEY_CHECKS=0;
+SET STATEMENT FOREIGN_KEY_CHECKS=0 FOR
 ALTER TABLE t1 DROP COLUMN f3, ADD FOREIGN KEY fk (f1)
 REFERENCES x(x);
-ERROR HY000: Failed to add the foreign key constraint 'test/fk' to system tables
 ALTER TABLE t1 DROP COLUMN f5;
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
   `f1` int(11) NOT NULL,
   `f2` int(11) DEFAULT NULL,
-  `f3` int(11) DEFAULT NULL,
   `f4` int(11) NOT NULL,
   PRIMARY KEY (`f1`,`f4`),
-  KEY `f2` (`f2`)
+  KEY `f2` (`f2`),
+  CONSTRAINT `fk` FOREIGN KEY (`f1`) REFERENCES `x` (`x`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 DROP TABLE t1, t2;
 #

mysql-test/suite/innodb/r/instant_alter_bugs.result

@@ -157,7 +157,7 @@ t2	CREATE TABLE `t2` (
   `status` enum('a','b','c') DEFAULT NULL,
   PRIMARY KEY (`f1`),
   KEY `idx1` (`f2`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`)
+  CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 ALTER TABLE t2 CHANGE status status VARCHAR(20) DEFAULT NULL;
 DROP TABLE t2, t1;

mysql-test/suite/innodb/r/lock_insert_into_empty.result

@@ -35,9 +35,9 @@ SET FOREIGN_KEY_CHECKS=ON;
 BEGIN;
 INSERT IGNORE INTO t1 VALUES (1,11);
 Warnings:
-Warning	1452	Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`f`) REFERENCES `nonexistent` (`x`))
+Warning	1452	Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`f`) REFERENCES `nonexistent` (`x`))
 REPLACE INTO t1 VALUES (1,12);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`f`) REFERENCES `nonexistent` (`x`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`f`) REFERENCES `nonexistent` (`x`))
 COMMIT;
 DROP TABLE t1;
 #

mysql-test/suite/innodb/r/stored_fk.result

@@ -17,7 +17,7 @@ t2	CREATE TABLE `t2` (
   `f1` int(11) NOT NULL,
   `f2` int(11) GENERATED ALWAYS AS (`f1`) VIRTUAL,
   KEY `f1` (`f1`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f1`) ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f1`) ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 drop table t2;
 # adding foreign key constraint for base columns during alter copy.

mysql-test/suite/innodb/r/truncate_foreign.result

@@ -5,7 +5,7 @@ ON UPDATE CASCADE)
 ENGINE=InnoDB;
 INSERT INTO child SET a=1;
 TRUNCATE TABLE parent;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`a`) REFERENCES `test`.`parent` (`a`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `test`.`parent` (`a`))
 TRUNCATE TABLE child;
 INSERT INTO child SET a=1;
 UPDATE parent SET a=2;
@@ -34,7 +34,7 @@ TRUNCATE TABLE child;
 ERROR HY000: Lock wait timeout exceeded; try restarting transaction
 SET DEBUG_SYNC='now SIGNAL go';
 connection dml;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`a`) REFERENCES `parent` (`a`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `parent` (`a`) ON UPDATE CASCADE)
 SELECT * FROM child;
 a
 3
@@ -85,13 +85,13 @@ SET FOREIGN_KEY_CHECKS=1;
 TRUNCATE t1;
 ERROR HY000: Cannot add foreign key constraint for `t1`
 INSERT INTO t1 VALUES (2,2);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t2` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t2` (`a`))
 SELECT * FROM t1;
 pk	a
 1	1
 UNLOCK TABLES;
 INSERT INTO t1 VALUES (2,2);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t2` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t2` (`a`))
 SET FOREIGN_KEY_CHECKS=0;
 INSERT INTO t1 VALUES (2,2);
 SELECT * FROM t1;

mysql-test/suite/innodb/r/update-cascade.result

@@ -18,7 +18,7 @@ t2	CREATE TABLE `t2` (
   `f2` int(11) DEFAULT NULL,
   PRIMARY KEY (`f1`),
   KEY `f2` (`f2`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`) ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`) ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 insert into t1 values (1, repeat('+', 20000));
 insert into t1 values (2, repeat('-', 20000));
@@ -81,7 +81,7 @@ t2	CREATE TABLE `t2` (
   `f2` int(11) DEFAULT NULL,
   PRIMARY KEY (`f1`),
   KEY `f2` (`f2`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 insert into t1 values (1, 91);
 insert into t2 values (1, 91);
@@ -136,7 +136,7 @@ t2	CREATE TABLE `t2` (
   `f1` int(11) NOT NULL,
   `f2` blob DEFAULT NULL,
   PRIMARY KEY (`f1`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f1`) ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f1`) ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 show create table t3;
 Table	Create Table
@@ -144,7 +144,7 @@ t3	CREATE TABLE `t3` (
   `f1` int(11) NOT NULL,
   `f2` blob DEFAULT NULL,
   PRIMARY KEY (`f1`),
-  CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t2` (`f1`) ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t2` (`f1`) ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 insert into t1 values (2, repeat('-', 20000));
 insert into t2 values (2, repeat('%', 20000));
@@ -224,7 +224,7 @@ t2	CREATE TABLE `t2` (
   `f2` int(11) DEFAULT NULL,
   PRIMARY KEY (`f1`),
   KEY `f2` (`f2`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 show create table t3;
 Table	Create Table
@@ -233,7 +233,7 @@ t3	CREATE TABLE `t3` (
   `f2` int(11) DEFAULT NULL,
   PRIMARY KEY (`f1`),
   KEY `f2` (`f2`),
-  CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `t2` (`f2`) ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `t2` (`f2`) ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 insert into t1 values (2, 91);
 insert into t2 values (2, 91);

mysql-test/suite/innodb/r/xa_recovery.result

@@ -38,7 +38,7 @@ CREATE TABLE t3(a INT PRIMARY KEY REFERENCES t1(a)) ENGINE=InnoDB;
 XA START 'a';
 INSERT INTO t3 SET a=1;
 INSERT INTO t3 SET a=42;
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t3`, CONSTRAINT `t3_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t3`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 XA END 'a';
 XA PREPARE 'a';
 SET GLOBAL innodb_fast_shutdown=0;

mysql-test/suite/innodb/t/add_constraint.test

@@ -10,9 +10,9 @@ create table t2(a int, b int, key(a),key(b))engine=innodb;
 alter table t2 add constraint b foreign key (b) references t1(a);
 alter table t1 add constraint b1 foreign key (b) references t2(a);
 
---error ER_CANT_CREATE_TABLE
 alter table t2 add constraint b1 foreign key (b) references t1(a);
 
+alter table t2 drop foreign key b1;
 alter table t2 drop foreign key b;
 alter table t1 drop foreign key b1;
 

mysql-test/suite/innodb/t/foreign-keys.test

@@ -299,3 +299,13 @@ drop table t2яяяяяяяяяяььььььььььззззззззззшшш
            t1яяяяяяяяяяььььььььььззззззззззшшшшшшшшшш;
 
 --echo # End of 10.6 tests
+
+--echo #
+--echo # MDEV-37077 Crash in innobase_get_foreign_key_info()
+--echo #
+
+CREATE TABLE t (id INT PRIMARY KEY, f INT NOT NULL, KEY(f)) ENGINE=InnoDB;
+--error ER_FK_INCORRECT_OPTION
+SET STATEMENT FOREIGN_KEY_CHECKS = OFF FOR
+ALTER TABLE t ADD FOREIGN KEY (f) REFERENCES t (id) ON UPDATE SET NULL;
+DROP TABLE t;

mysql-test/suite/innodb/t/foreign_key.test

@@ -22,11 +22,11 @@ constraint c1 foreign key (f1) references t1(f1)) engine=InnoDB;
 create table t2 (f1 int primary key,
    constraint c1 foreign key (f1) references t1(f1)) engine=innodb;
 
---error ER_CANT_CREATE_TABLE
+--error ER_DUP_CONSTRAINT_NAME
 alter table t2 add constraint c1 foreign key (f1) references t1(f1);
 
-set foreign_key_checks = 0;
 --error ER_DUP_CONSTRAINT_NAME
+set statement foreign_key_checks = 0 for
 alter table t2 add constraint c1 foreign key (f1) references t1(f1);
 
 drop table t2, t1;
@@ -195,9 +195,9 @@ CREATE TABLE t3 (a INT PRIMARY KEY,
 CONSTRAINT t2_ibfk_1 FOREIGN KEY (a) REFERENCES t1(a)) ENGINE=InnoDB;
 CREATE TABLE best.t2 (a INT PRIMARY KEY, b TEXT, FULLTEXT INDEX(b),
 FOREIGN KEY (a) REFERENCES test.t1(a)) ENGINE=InnoDB;
---replace_regex /Table '.*t2'/Table 't2'/
---error ER_TABLE_EXISTS_ERROR
 RENAME TABLE best.t2 TO test.t2;
+SHOW CREATE TABLE test.t2;
+RENAME TABLE test.t2 TO best.t2;
 SHOW CREATE TABLE best.t2;
 DROP DATABASE best;
 
@@ -245,7 +245,8 @@ ALTER TABLE t1 CHANGE COLUMN a a TIME NOT NULL;
 ALTER TABLE t1 ADD pk INT NOT NULL AUTO_INCREMENT PRIMARY KEY;
 --error ER_ALTER_OPERATION_NOT_SUPPORTED_REASON
 ALTER TABLE t1 CHANGE COLUMN a b TIME;
-ALTER TABLE t1 CHANGE COLUMN a b TIME, DROP FOREIGN KEY t1_ibfk_1;
+SHOW CREATE TABLE t1;
+ALTER TABLE t1 CHANGE COLUMN a b TIME, DROP FOREIGN KEY `1`;
 SET SESSION FOREIGN_KEY_CHECKS = ON;
 DROP TABLE t1;
 
@@ -748,7 +749,7 @@ DROP TABLE t1;
 --echo # with CONSTRAINTs
 --echo #
 
-call mtr.add_suppression("\\[Warning\\] InnoDB: In ALTER TABLE `test`\\.`t2` has or is referenced in foreign key constraints which are not compatible with the new table definition.");
+call mtr.add_suppression("\\[Warning\\] InnoDB: In ALTER TABLE `test`\\.`t[12]` has or is referenced in foreign key constraints which are not compatible with the new table definition.");
 
 set foreign_key_checks=on;
 create table t1 (id int not null primary key) engine=innodb;

mysql-test/suite/innodb/t/innodb-fk-warnings.test

@@ -11,11 +11,6 @@ CREATE TABLE t1 (
   CONSTRAINT test FOREIGN KEY (b) REFERENCES t1 (id)
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
 
-#
-# Below create table fails because constraint name test
-# is reserved for above table.
-#
---error ER_CANT_CREATE_TABLE
 CREATE TABLE t2 (
   id int(11) NOT NULL PRIMARY KEY,
   a int(11) NOT NULL,
@@ -27,7 +22,7 @@ CREATE TABLE t2 (
 
 show warnings;
 
-drop table t1;
+drop table t2,t1;
 
 #
 # MDEV-6697: Improve foreign keys warnings/errors

mysql-test/suite/innodb/t/innodb-fk.test

@@ -194,13 +194,13 @@ CREATE TABLE `boroda` (
   `b` INT(11) UNSIGNED DEFAULT NULL,
   PRIMARY KEY (`id`),
   KEY `a` (`a`),
-  CONSTRAINT `boroda_ibfk_1` FOREIGN KEY (`a`) REFERENCES `boroda` (`id`)
+  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `boroda` (`id`)
 ) ENGINE=INNODB DEFAULT CHARSET=utf8;
 
 ALTER TABLE `boroda`
   ADD FOREIGN KEY (`b`) REFERENCES `boroda`(`id`);
 
-ALTER TABLE `boroda` DROP FOREIGN KEY `boroda_ibfk_2`;
+ALTER TABLE `boroda` DROP FOREIGN KEY `2`;
 
 RENAME TABLE `boroda` TO `#boroda`;
 
@@ -216,7 +216,7 @@ CREATE TABLE `boroda` (
   `b` INT(11) UNSIGNED DEFAULT NULL,
   PRIMARY KEY (`id`),
   KEY `a` (`a`),
-  CONSTRAINT `boroda_ibfk_1` FOREIGN KEY (`a`) REFERENCES `boroda` (`id`)
+  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `boroda` (`id`)
 ) ENGINE=INNODB DEFAULT CHARSET=utf8;
 
 RENAME TABLE `boroda` TO `bor#oda`;

mysql-test/suite/innodb/t/innodb-index-online-fk.test

@@ -473,7 +473,6 @@ ALTER TABLE `t2` ADD CONSTRAINT `fw` FOREIGN KEY (`c`) REFERENCES t3 (a);
 
 ALTER TABLE `t2` ADD CONSTRAINT `e` foreign key (`d`) REFERENCES t3(a);
 
---error ER_FK_FAIL_ADD_SYSTEM
 ALTER TABLE `t3` ADD CONSTRAINT `e` foreign key (`c`) REFERENCES `t2`(`c`) ON UPDATE SET NULL;
 
 SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN;

mysql-test/suite/innodb/t/innodb-index.test

@@ -220,13 +220,9 @@ show create table t4;
 # mysqltest first does replace_regex, then replace_result
 # Embedded server doesn't chdir to data directory
 --replace_result $MYSQLD_DATADIR ./ master-data/ ''
-# a foreign key 'test/dc' already exists
---error ER_CANT_CREATE_TABLE
 alter table t3 add constraint dc foreign key (a) references t1(a);
-SET FOREIGN_KEY_CHECKS=0;
+alter table t3 drop foreign key dc;
---error ER_FK_FAIL_ADD_SYSTEM
 alter table t3 add constraint dc foreign key (a) references t1(a);
-SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
 show create table t3;
 --enable_info
 alter table t2 drop index b, add index (beta);
@@ -237,7 +233,6 @@ delete from t1;
 --error ER_CANT_DROP_FIELD_OR_KEY
 drop index dc on t4;
 --enable_info
---error ER_CANT_DROP_FIELD_OR_KEY
 alter table t3 drop foreign key dc;
 alter table t4 drop foreign key dc;
 --disable_info

mysql-test/suite/innodb/t/innodb.test

@@ -1797,9 +1797,9 @@ drop table t2,t1;
 CREATE TABLE t1(a INT, PRIMARY KEY(a)) ENGINE=InnoDB;
 CREATE TABLE t2(a INT) ENGINE=InnoDB;
 ALTER TABLE t2 ADD FOREIGN KEY (a) REFERENCES t1(a);
-ALTER TABLE t2 DROP FOREIGN KEY t2_ibfk_1;
+ALTER TABLE t2 DROP FOREIGN KEY `1`;
-ALTER TABLE t2 ADD CONSTRAINT t2_ibfk_0 FOREIGN KEY (a) REFERENCES t1(a);
+ALTER TABLE t2 ADD CONSTRAINT `0` FOREIGN KEY (a) REFERENCES t1(a);
-ALTER TABLE t2 DROP FOREIGN KEY t2_ibfk_0;
+ALTER TABLE t2 DROP FOREIGN KEY `0`;
 SHOW CREATE TABLE t2;
 DROP TABLE t2,t1;
 SET sql_mode = default;

mysql-test/suite/innodb/t/instant_alter.test

@@ -354,7 +354,7 @@ eval CREATE TABLE t2 (b INT PRIMARY KEY, FOREIGN KEY(b) REFERENCES t1(a))
 $engine;
 INSERT INTO t1 SET a=1;
 INSERT INTO t2 SET b=1;
-ALTER TABLE t2 ADD COLUMN a INT, DROP FOREIGN KEY t2_ibfk_1;
+ALTER TABLE t2 ADD COLUMN a INT, DROP FOREIGN KEY `1`;
 ALTER TABLE t2 ADD INDEX(a);
 --error ER_ALTER_OPERATION_NOT_SUPPORTED_REASON
 ALTER TABLE t1 ADD COLUMN b INT, ADD FOREIGN KEY(a) REFERENCES t2(a),
@@ -366,7 +366,7 @@ ALTER TABLE t2 ADD CONSTRAINT fk FOREIGN KEY(b) REFERENCES t1(a),
 ALGORITHM=INSTANT;
 SET foreign_key_checks=1;
 ALTER TABLE t2 COMMENT 'domestic keys only', DROP FOREIGN KEY fk;
-ALTER TABLE t1 DROP FOREIGN KEY t1_ibfk_1;
+ALTER TABLE t1 DROP FOREIGN KEY `1`;
 ALTER TABLE t1 ADD COLUMN big BLOB NOT NULL
 DEFAULT REPEAT('a', @@GLOBAL.innodb_page_size * .75);
 CHECK TABLE t2, t1;
@@ -951,8 +951,7 @@ CREATE TABLE t2 (f1 INT, f2 INT, PRIMARY KEY(f1),
 		)ENGINE=InnoDB;
 
 ALTER TABLE t1 ADD f5 INT;
-SET FOREIGN_KEY_CHECKS=0;
+SET STATEMENT FOREIGN_KEY_CHECKS=0 FOR
---error ER_FK_FAIL_ADD_SYSTEM
 ALTER TABLE t1 DROP COLUMN f3, ADD FOREIGN KEY fk (f1)
 	REFERENCES x(x);
 ALTER TABLE t1 DROP COLUMN f5;

mysql-test/suite/innodb_fts/r/foreign_key_update.result

@@ -42,5 +42,5 @@ FULLTEXT (b))ENGINE=InnoDB;
 INSERT INTO t1 SET a=1;
 ALTER TABLE t2 DISCARD TABLESPACE;
 UPDATE t1 SET a=2;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 DROP TABLE t2,t1;

mysql-test/suite/innodb_fts/r/innodb_fts_misc_1.result

@@ -32,9 +32,9 @@ INSERT INTO t2 (a2,b2) VALUES
 ('MySQL Security','When configured properly, MySQL ...');
 INSERT INTO t2 (a2,b2) VALUES
 ('MySQL Tricks','1. Never run mysqld as root. 2. ...');
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
 DELETE FROM t1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	Engine-independent statistics collected
@@ -184,7 +184,7 @@ t2	CREATE TABLE `t2` (
   `s2` varchar(200) DEFAULT NULL,
   KEY `FTS_DOC_ID` (`FTS_DOC_ID`),
   FULLTEXT KEY `idx` (`s2`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`FTS_DOC_ID`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`FTS_DOC_ID`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 insert into t1 values (1,'Sunshine'),(2,'Lollipops');
 insert into t2 values (1,'Sunshine'),(2,'Lollipops');
@@ -193,7 +193,7 @@ select * from t2 where match(s2) against ('sunshine');
 FTS_DOC_ID	s2
 3	Sunshine
 update t1 set s1 = 1 where s1=3;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`FTS_DOC_ID`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`FTS_DOC_ID`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE)
 DROP TABLE t2 , t1;
 CREATE TABLE t1 (
 id1 INT ,
@@ -265,9 +265,9 @@ INSERT INTO t2 (a2,b2) VALUES
 ('MySQL Security','When configured properly, MySQL ...');
 INSERT INTO t2 (a2,b2) VALUES
 ('MySQL Tricks','1. Never run mysqld as root. 2. ...');
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
 DELETE FROM t1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
 SELECT * FROM t1 WHERE MATCH (a1,b1) AGAINST ('tutorial') ORDER BY id1;
 id1	a1	b1
 1	MySQL Tutorial	DBMS stands for DataBase VÐƷWİ...
@@ -957,10 +957,10 @@ pk	f1	f2	f3	f4	f5	f6	f7	f8
 ROLLBACK;
 ALTER TABLE t1 ADD FOREIGN KEY (f5) REFERENCES t1 (f6) ON UPDATE SET NULL;
 UPDATE t1 SET f6='update';
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_3` FOREIGN KEY (`f5`) REFERENCES `t1` (`f6`) ON UPDATE SET NULL)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `3` FOREIGN KEY (`f5`) REFERENCES `t1` (`f6`) ON UPDATE SET NULL)
 ALTER TABLE t1 ADD FOREIGN KEY (f7) REFERENCES t1 (f8) ON UPDATE CASCADE;
 UPDATE t1 SET f6='cascade';
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_3` FOREIGN KEY (`f5`) REFERENCES `t1` (`f6`) ON UPDATE SET NULL)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `3` FOREIGN KEY (`f5`) REFERENCES `t1` (`f6`) ON UPDATE SET NULL)
 DROP TABLE t1;
 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
 #

mysql-test/suite/innodb_fts/r/misc_1.result

@@ -32,9 +32,9 @@ INSERT INTO t2 (a2,b2) VALUES
 ('MySQL Security','When configured properly, MySQL ...');
 INSERT INTO t2 (a2,b2) VALUES
 ('MySQL Tricks','1. Never run mysqld as root. 2. ...');
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
 DELETE FROM t1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	Engine-independent statistics collected
@@ -184,7 +184,7 @@ t2	CREATE TABLE `t2` (
   `s2` varchar(200) DEFAULT NULL,
   KEY `FTS_DOC_ID` (`FTS_DOC_ID`),
   FULLTEXT KEY `idx` (`s2`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`FTS_DOC_ID`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`FTS_DOC_ID`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 insert into t1 values (1,'Sunshine'),(2,'Lollipops');
 insert into t2 values (1,'Sunshine'),(2,'Lollipops');
@@ -193,7 +193,7 @@ select * from t2 where match(s2) against ('sunshine');
 FTS_DOC_ID	s2
 3	Sunshine
 update t1 set s1 = 1 where s1=3;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`FTS_DOC_ID`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`FTS_DOC_ID`) REFERENCES `t1` (`s1`) ON UPDATE CASCADE)
 DROP TABLE t2 , t1;
 CREATE TABLE t1 (
 id1 INT ,
@@ -265,9 +265,9 @@ INSERT INTO t2 (a2,b2) VALUES
 ('MySQL Security','When configured properly, MySQL ...');
 INSERT INTO t2 (a2,b2) VALUES
 ('MySQL Tricks','1. Never run mysqld as root. 2. ...');
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
 DELETE FROM t1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a2`) REFERENCES `t1` (`a1`) ON UPDATE CASCADE)
 SELECT * FROM t1 WHERE MATCH (a1,b1) AGAINST ('tutorial') ORDER BY id1;
 id1	a1	b1
 1	MySQL Tutorial	DBMS stands for DataBase VÐƷWİ...

mysql-test/suite/rpl/r/rpl_alter_rollback.result

@@ -15,7 +15,7 @@ ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint
 create table t2 (f1 int primary key,
 constraint c1 foreign key (f1) references t1(f1)) engine=innodb;
 alter table t2 add constraint c1 foreign key (f1) references t1(f1);
-ERROR HY000: Can't create table `test`.`t2` (errno: 121 "Duplicate key on write or update")
+ERROR HY000: Duplicate FOREIGN KEY constraint name ''
 include/show_binlog_events.inc
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
@@ -27,9 +27,9 @@ master-bin.000001	#	Gtid	#	#	GTID #-#-# START ALTER
 master-bin.000001	#	Query	#	#	use `test`; alter table t2 add constraint c1 foreign key (f1) references t1(f1)
 master-bin.000001	#	Gtid	#	#	GTID #-#-# ROLLBACK ALTER id=#
 master-bin.000001	#	Query	#	#	use `test`; alter table t2 add constraint c1 foreign key (f1) references t1(f1)
-set foreign_key_checks = 0;
+set statement foreign_key_checks = 0 for
 alter table t2 add constraint c1 foreign key (f1) references t1(f1);
-ERROR HY000: Duplicate FOREIGN KEY constraint name 'test/c1'
+ERROR HY000: Duplicate FOREIGN KEY constraint name 'c1'
 include/show_binlog_events.inc
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Gtid	#	#	GTID #-#-#
@@ -42,9 +42,11 @@ master-bin.000001	#	Query	#	#	use `test`; alter table t2 add constraint c1 forei
 master-bin.000001	#	Gtid	#	#	GTID #-#-# ROLLBACK ALTER id=#
 master-bin.000001	#	Query	#	#	use `test`; alter table t2 add constraint c1 foreign key (f1) references t1(f1)
 master-bin.000001	#	Gtid	#	#	GTID #-#-# START ALTER
-master-bin.000001	#	Query	#	#	use `test`; set foreign_key_checks=1; alter table t2 add constraint c1 foreign key (f1) references t1(f1)
+master-bin.000001	#	Query	#	#	use `test`; set foreign_key_checks=1; set statement foreign_key_checks = 0 for
+alter table t2 add constraint c1 foreign key (f1) references t1(f1)
 master-bin.000001	#	Gtid	#	#	GTID #-#-# ROLLBACK ALTER id=#
-master-bin.000001	#	Query	#	#	use `test`; set foreign_key_checks=1; alter table t2 add constraint c1 foreign key (f1) references t1(f1)
+master-bin.000001	#	Query	#	#	use `test`; set foreign_key_checks=1; set statement foreign_key_checks = 0 for
+alter table t2 add constraint c1 foreign key (f1) references t1(f1)
 connection slave;
 connection master;
 drop table t2, t1;

mysql-test/suite/rpl/t/rpl_alter_rollback.test

@@ -22,12 +22,12 @@ constraint c1 foreign key (f1) references t1(f1)) engine=InnoDB;
 create table t2 (f1 int primary key,
    constraint c1 foreign key (f1) references t1(f1)) engine=innodb;
 
---error ER_CANT_CREATE_TABLE
+--error ER_DUP_CONSTRAINT_NAME
 alter table t2 add constraint c1 foreign key (f1) references t1(f1);
 --source include/show_binlog_events.inc
 
-set foreign_key_checks = 0;
 --error ER_DUP_CONSTRAINT_NAME
+set statement foreign_key_checks = 0 for
 alter table t2 add constraint c1 foreign key (f1) references t1(f1);
 --source include/show_binlog_events.inc
 --sync_slave_with_master

mysql-test/suite/storage_engine/foreign_keys.result

@@ -13,18 +13,18 @@ t2	CREATE TABLE `t2` (
   `a` int(11) DEFAULT NULL,
   `b` char(8) DEFAULT NULL,
   KEY `a` (`a`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
+  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
-) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
+) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b');
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 INSERT INTO t1 (a,b) VALUES (1,'c'),(2,'d');
 INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b');
 UPDATE t2 SET a=a+1;
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 UPDATE t1 SET a=3 WHERE a=2;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 DELETE FROM t1 WHERE a=2;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 DELETE FROM t2 WHERE a=2;
 SELECT a,b FROM t1;
 a	b
@@ -47,10 +47,10 @@ t2	CREATE TABLE `t2` (
   `a` int(11) DEFAULT NULL,
   `b` char(8) DEFAULT NULL,
   KEY `a` (`a`),
-  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE
+  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE
-) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
+) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d');
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE)
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE)
 INSERT INTO t1 (a,b) VALUES (3,'a'),(4,'a');
 INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d'),(4,'e'),(3,'a');
 UPDATE t1 SET a=a+1;
@@ -66,6 +66,6 @@ DELETE FROM t1 WHERE b='a' LIMIT 2;
 SELECT a,b FROM t2;
 a	b
 TRUNCATE TABLE t1;
-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`))
+ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`))
 DROP TABLE t2;
 DROP TABLE t1;

mysql-test/suite/vcol/inc/vcol_ins_upd.inc

@@ -248,7 +248,7 @@ if ($innodb_engine)
   --error ER_ROW_IS_REFERENCED_2
   update t2 set a=4 where a=3;
   select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
-  alter table t1 drop foreign key t1_ibfk_1;
+  alter table t1 drop foreign key `1`;
 
   --echo #  - ON DELETE RESTRICT
   alter table t1 add foreign key (b) references t2(a) on delete restrict;
@@ -256,14 +256,14 @@ if ($innodb_engine)
   delete from t2 where a=3;
   select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
   select t1.a, t1.b, t2.name from t1 left outer join t2 on (t1.b=t2.a);
-  alter table t1 drop foreign key t1_ibfk_1;
+  alter table t1 drop foreign key `1`;
 
   --echo #  - ON DELETE CASCADE
   alter table t1 add foreign key (b) references t2(a) on delete cascade;
   delete from t2 where a=3;
   select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
   select t1.a, t1.b, t2.name from t1 left outer join t2 on (t1.b=t2.a);
-  alter table t1 drop foreign key t1_ibfk_1;
+  alter table t1 drop foreign key `1`;
 
   drop table t1;
   drop table t2;

mysql-test/suite/vcol/r/innodb_virtual_fk.result

@@ -93,7 +93,7 @@ t	CREATE TABLE `t` (
   KEY `b` (`b`),
   KEY `c` (`c`),
   KEY `a` (`a`),
-  CONSTRAINT `t_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t` (`b`)
+  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t` (`b`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
 drop table t;
 #

mysql-test/suite/vcol/r/vcol_ins_upd_innodb.result

@@ -364,19 +364,19 @@ a	b	name
 #  - ON UPDATE RESTRICT
 alter table t1 add foreign key (b) references t2(a) on update restrict;
 insert into t1 (a) values (4);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
 update t2 set a=4 where a=3;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
 select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
 a	b	name
 1	1	value1
 2	2	value2
 3	3	value3
-alter table t1 drop foreign key t1_ibfk_1;
+alter table t1 drop foreign key `1`;
 #  - ON DELETE RESTRICT
 alter table t1 add foreign key (b) references t2(a) on delete restrict;
 delete from t2 where a=3;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
 select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
 a	b	name
 1	1	value1
@@ -387,7 +387,7 @@ a	b	name
 1	1	value1
 2	2	value2
 3	3	value3
-alter table t1 drop foreign key t1_ibfk_1;
+alter table t1 drop foreign key `1`;
 #  - ON DELETE CASCADE
 alter table t1 add foreign key (b) references t2(a) on delete cascade;
 delete from t2 where a=3;
@@ -399,7 +399,7 @@ select t1.a, t1.b, t2.name from t1 left outer join t2 on (t1.b=t2.a);
 a	b	name
 1	1	value1
 2	2	value2
-alter table t1 drop foreign key t1_ibfk_1;
+alter table t1 drop foreign key `1`;
 drop table t1;
 drop table t2;
 #

mysql-test/suite/versioning/r/foreign.result

@@ -17,13 +17,13 @@ on update restrict
 insert into parent values(1);
 insert into child values(1);
 delete from parent where id = 1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
 delete from child where parent_id = 1;
 delete from parent where id = 1;
 insert into parent values(1);
 insert into child values(1);
 update parent set id=id+1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
 delete from child;
 update parent set id=id+1;
 select * from child for system_time all;
@@ -49,7 +49,7 @@ foreign key(parent_id) references parent(id)
 insert into parent values(1);
 insert into child values(1);
 delete from parent where id = 1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
 drop table child;
 drop table parent;
 ################
@@ -202,19 +202,19 @@ foreign key(parent_id) references parent(id)
 insert into parent values(1);
 insert into child values(1);
 delete from parent;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
 update parent set id=2;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
 delete from child;
 delete from parent;
 insert into child values(1);
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
 insert into parent values(1);
 insert into child values(1);
 delete from parent;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
 update parent set id=2;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
 drop table child;
 drop table parent;
 ###################
@@ -307,7 +307,7 @@ set foreign_key_checks= off;
 insert ignore into t2 values (1);
 set foreign_key_checks= on;
 update t2 set f2= 2;
-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`))
+ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`))
 delete from t2;
 drop table t2, t1;
 #
@@ -409,7 +409,7 @@ insert into t1 values (1),(2);
 insert into t2 values (1);
 # DELETE from referenced table is not allowed
 delete from t1 where a = 1;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`))
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `t1` (`a`))
 drop tables t2, t1;
 #
 # MDEV-20812 Unexpected ER_ROW_IS_REFERENCED_2 or server crash in row_ins_foreign_report_err upon DELETE from versioned table with FK
@@ -506,14 +506,14 @@ insert into t0 (pk) values (1);
 insert into t1 (pk) values (1);
 insert into t2 (pk) values (1);
 delete from t0;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`pk`) REFERENCES `t0` (`pk`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`pk`) REFERENCES `t0` (`pk`) ON UPDATE CASCADE)
 replace t0 values (1);
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`pk`) REFERENCES `t0` (`pk`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`pk`) REFERENCES `t0` (`pk`) ON UPDATE CASCADE)
 select * into outfile 'load_t0' from t0 ;
 load data infile 'load_t0' replace into table t0;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`pk`) REFERENCES `t0` (`pk`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`pk`) REFERENCES `t0` (`pk`) ON UPDATE CASCADE)
 delete t0, t2 from t0 join t2;
-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`pk`) REFERENCES `t0` (`pk`) ON UPDATE CASCADE)
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `1` FOREIGN KEY (`pk`) REFERENCES `t0` (`pk`) ON UPDATE CASCADE)
 select pk from t0;
 pk
 1

storage/innobase/dict/dict0dict.cc

@@ -107,9 +107,6 @@ ulong	zip_pad_max = 50;
 #define DICT_POOL_PER_VARYING	4	/*!< buffer pool max size per data
 					dictionary varying size in bytes */
 
-/** Identifies generated InnoDB foreign key names */
-static char	dict_ibfk[] = "_ibfk_";
-
 /*******************************************************************//**
 Tries to find column names for the index and sets the col field of the
 index.
@@ -1488,26 +1485,6 @@ dict_table_t::rename_tablespace(span<const char> new_name, bool replace) const
   return err;
 }
 
-/**********************************************************************
-Converts an identifier from my_charset_filename to UTF-8 charset.
-@return result string length, as returned by strconvert() */
-static
-uint
-innobase_convert_to_filename_charset(
-/*=================================*/
-	char*		to,	/* out: converted identifier */
-	const char*	from,	/* in: identifier to convert */
-	ulint		len)	/* in: length of 'to', in bytes */
-{
-	uint		errors;
-	CHARSET_INFO*	cs_to = &my_charset_filename;
-	CHARSET_INFO*	cs_from = system_charset_info;
-
-	return(static_cast<uint>(strconvert(
-				cs_from, from, uint(strlen(from)),
-				cs_to, to, static_cast<uint>(len), &errors)));
-}
-
 /**********************************************************************//**
 Renames a table object.
 @return TRUE if success */
@@ -1647,150 +1624,17 @@ dict_table_rename_in_cache(
 			foreign->heap, table->name.m_name);
 		foreign->foreign_table_name_lookup_set();
 
-		if (strchr(foreign->id, '/')) {
+		const char* sql_id = foreign->sql_id();
-			/* This is a >= 4.0.18 format id */
+		size_t fklen = snprintf(nullptr, 0, "%s\377%s",
-
+					table->name.m_name, sql_id);
-			ulint	db_len;
+		char* id = foreign->id;
-			char*	old_id;
+		if (fklen++ > strlen(id)) {
-			char    old_name_cs_filename[MAX_FULL_NAME_LEN+1];
+			id = static_cast<char*>(
-			uint    errors = 0;
+				mem_heap_alloc(foreign->heap, fklen));
-
-			/* All table names are internally stored in charset
-			my_charset_filename (except the temp tables and the
-			partition identifier suffix in partition tables). The
-			foreign key constraint names are internally stored
-			in UTF-8 charset.  The variable fkid here is used
-			to store foreign key constraint name in charset
-			my_charset_filename for comparison further below. */
-			char    fkid[MAX_TABLE_NAME_LEN * 2 + 20];
-
-			/* The old table name in my_charset_filename is stored
-			in old_name_cs_filename */
-
-			strcpy(old_name_cs_filename, old_name);
-			old_name_cs_filename[MAX_FULL_NAME_LEN] = '\0';
-			if (!dict_table_t::is_temporary_name(old_name)) {
-				innobase_convert_to_system_charset(
-					strchr(old_name_cs_filename, '/') + 1,
-					strchr(old_name, '/') + 1,
-					MAX_TABLE_NAME_LEN, &errors);
-
-				if (errors) {
-					/* There has been an error to convert
-					old table into UTF-8.  This probably
-					means that the old table name is
-					actually in UTF-8. */
-					innobase_convert_to_filename_charset(
-						strchr(old_name_cs_filename,
-						       '/') + 1,
-						strchr(old_name, '/') + 1,
-						MAX_TABLE_NAME_LEN);
-				} else {
-					/* Old name already in
-					my_charset_filename */
-					strcpy(old_name_cs_filename, old_name);
-					old_name_cs_filename[MAX_FULL_NAME_LEN]
-						= '\0';
-				}
-			}
-
-			strncpy(fkid, foreign->id, (sizeof fkid) - 1);
-			fkid[(sizeof fkid) - 1] = '\0';
-
-			const bool on_tmp = dict_table_t::is_temporary_name(
-				fkid);
-
-			if (!on_tmp) {
-				innobase_convert_to_filename_charset(
-					strchr(fkid, '/') + 1,
-					strchr(foreign->id, '/') + 1,
-					MAX_TABLE_NAME_LEN+20);
-			}
-
-			old_id = mem_strdup(foreign->id);
-
-			if (strlen(fkid) > strlen(old_name_cs_filename)
-			    + ((sizeof dict_ibfk) - 1)
-			    && !memcmp(fkid, old_name_cs_filename,
-				       strlen(old_name_cs_filename))
-			    && !memcmp(fkid + strlen(old_name_cs_filename),
-				       dict_ibfk, (sizeof dict_ibfk) - 1)) {
-
-				/* This is a generated >= 4.0.18 format id */
-
-				char	table_name[MAX_TABLE_NAME_LEN + 1];
-				uint	errors = 0;
-
-				if (strlen(table->name.m_name)
-				    > strlen(old_name)) {
-					foreign->id = static_cast<char*>(
-						mem_heap_alloc(
-						foreign->heap,
-						strlen(table->name.m_name)
-						+ strlen(old_id) + 1));
-				}
-
-				/* Convert the table name to UTF-8 */
-				strncpy(table_name, table->name.m_name,
-					MAX_TABLE_NAME_LEN);
-				table_name[MAX_TABLE_NAME_LEN] = '\0';
-				innobase_convert_to_system_charset(
-					strchr(table_name, '/') + 1,
-					strchr(table->name.m_name, '/') + 1,
-					MAX_TABLE_NAME_LEN, &errors);
-
-				if (errors) {
-					/* Table name could not be converted
-					from charset my_charset_filename to
-					UTF-8. This means that the table name
-					is already in UTF-8 (#mysql50#). */
-					strncpy(table_name, table->name.m_name,
-						MAX_TABLE_NAME_LEN);
-					table_name[MAX_TABLE_NAME_LEN] = '\0';
-				}
-
-				/* Replace the prefix 'databasename/tablename'
-				with the new names */
-				strcpy(foreign->id, table_name);
-				if (on_tmp) {
-					strcat(foreign->id,
-					       old_id + strlen(old_name));
-				} else {
-					sprintf(strchr(foreign->id, '/') + 1,
-						"%s%s",
-						strchr(table_name, '/') +1,
-						strstr(old_id, "_ibfk_") );
-				}
-
-			} else {
-				/* This is a >= 4.0.18 format id where the user
-				gave the id name */
-				db_len = dict_get_db_name_len(
-					table->name.m_name) + 1;
-
-				if (db_len - 1
-				    > dict_get_db_name_len(foreign->id)) {
-
-					foreign->id = static_cast<char*>(
-						mem_heap_alloc(
-						foreign->heap,
-						db_len + strlen(old_id) + 1));
-				}
-
-				/* Replace the database prefix in id with the
-				one from table->name */
-
-				memcpy(foreign->id,
-				       table->name.m_name, db_len);
-
-				strcpy(foreign->id + db_len,
-				       dict_remove_db_name(old_id));
-			}
-
-			ut_free(old_id);
 		}
-
 		table->foreign_set.erase(it);
+		foreign->id = id;
+		snprintf(id, fklen, "%s\377%s", table->name.m_name, sql_id);
 		fk_set.insert(foreign);
 
 		if (foreign->referenced_table) {
@@ -3302,69 +3146,6 @@ end_of_string:
 	}
 }
 
-/*********************************************************************//**
-Finds the highest [number] for foreign key constraints of the table. Looks
-only at the >= 4.0.18-format id's, which are of the form
-databasename/tablename_ibfk_[number].
-@return highest number, 0 if table has no new format foreign key constraints */
-ulint
-dict_table_get_highest_foreign_id(
-/*==============================*/
-	dict_table_t*	table)	/*!< in: table in the dictionary memory cache */
-{
-	dict_foreign_t*	foreign;
-	char*		endp;
-	ulint		biggest_id	= 0;
-	ulint		id;
-	ulint		len;
-
-	DBUG_ENTER("dict_table_get_highest_foreign_id");
-
-	ut_a(table);
-
-	len = strlen(table->name.m_name);
-
-	for (dict_foreign_set::iterator it = table->foreign_set.begin();
-	     it != table->foreign_set.end();
-	     ++it) {
-		char    fkid[MAX_TABLE_NAME_LEN * 2 + 20];
-		foreign = *it;
-
-		strncpy(fkid, foreign->id, (sizeof fkid) - 1);
-		fkid[(sizeof fkid) - 1] = '\0';
-		/* Convert foreign key identifier on dictionary memory
-		cache to filename charset. */
-		innobase_convert_to_filename_charset(
-				strchr(fkid, '/') + 1,
-				strchr(foreign->id, '/') + 1,
-				MAX_TABLE_NAME_LEN);
-
-		if (strlen(fkid) > ((sizeof dict_ibfk) - 1) + len
-		    && 0 == memcmp(fkid, table->name.m_name, len)
-		    && 0 == memcmp(fkid + len,
-				   dict_ibfk, (sizeof dict_ibfk) - 1)
-		    && fkid[len + ((sizeof dict_ibfk) - 1)] != '0') {
-			/* It is of the >= 4.0.18 format */
-
-			id = strtoul(fkid + len
-				     + ((sizeof dict_ibfk) - 1),
-				     &endp, 10);
-			if (*endp == '\0') {
-				ut_a(id != biggest_id);
-
-				if (id > biggest_id) {
-					biggest_id = id;
-				}
-			}
-		}
-	}
-
-	DBUG_PRINT("dict_table_get_highest_foreign_id",
-		   ("id: " ULINTPF, biggest_id));
-
-	DBUG_RETURN(biggest_id);
-}
-
 /**********************************************************************//**
 Parses the CONSTRAINT id's to be dropped in an ALTER TABLE statement.
 @return DB_SUCCESS or DB_CANNOT_DROP_CONSTRAINT if syntax error or the
@@ -3432,8 +3213,25 @@ loop:
 	ptr = dict_accept(cs, ptr, "KEY", &success);
 
 	if (!success) {
+syntax_error:
+		if (!srv_read_only_mode) {
+			FILE*	ef = dict_foreign_err_file;
 
-		goto syntax_error;
+			mysql_mutex_lock(&dict_foreign_err_mutex);
+			rewind(ef);
+			ut_print_timestamp(ef);
+                        fputs(" Syntax error in dropping of a"
+			      " foreign key constraint of table ", ef);
+			ut_print_name(ef, NULL, table->name.m_name);
+			fprintf(ef, ",\n"
+				"close to:\n%s\n in SQL command\n%s\n",
+				ptr, str);
+			mysql_mutex_unlock(&dict_foreign_err_mutex);
+		}
+
+		ut_free(str);
+
+		return DB_CANNOT_DROP_CONSTRAINT;
 	}
 
 	ptr1 = dict_accept(cs, ptr, "IF", &success);
@@ -3448,16 +3246,16 @@ loop:
 
 	ptr = dict_scan_id(cs, ptr, heap, &id);
 
-	if (id == NULL) {
+	if (!id) {
-
 		goto syntax_error;
 	}
 
-	if (std::find_if(table->foreign_set.begin(),
+	const Lex_ident_column i{Lex_cstring_strlen(id)};
-			    table->foreign_set.end(),
-			    dict_foreign_matches_id(id))
-	        == table->foreign_set.end()) {
 
+	if (std::find_if(table->foreign_set.begin(), table->foreign_set.end(),
+			 [&i](const dict_foreign_t *fk)
+			 {return i.streq(Lex_cstring_strlen(fk->sql_id()));})
+	    == table->foreign_set.end()) {
 		if (if_exists) {
 			goto loop;
 		}
@@ -3486,25 +3284,6 @@ loop:
 	(*constraints_to_drop)[*n] = id;
 	(*n)++;
 	goto loop;
-
-syntax_error:
-	if (!srv_read_only_mode) {
-		FILE*	ef = dict_foreign_err_file;
-
-		mysql_mutex_lock(&dict_foreign_err_mutex);
-		rewind(ef);
-		ut_print_timestamp(ef);
-		fputs(" Syntax error in dropping of a"
-		      " foreign key constraint of table ", ef);
-		ut_print_name(ef, NULL, table->name.m_name);
-		fprintf(ef, ",\n"
-			"close to:\n%s\n in SQL command\n%s\n", ptr, str);
-		mysql_mutex_unlock(&dict_foreign_err_mutex);
-	}
-
-	ut_free(str);
-
-	return(DB_CANNOT_DROP_CONSTRAINT);
 }
 
 /*==================== END OF FOREIGN KEY PROCESSING ====================*/
@@ -3710,18 +3489,10 @@ dict_print_info_on_foreign_key_in_create_format(const trx_t *trx,
                                                 const dict_foreign_t *foreign,
                                                 bool add_newline)
 {
-	const char*	stripped_id;
+	const char*	id = foreign->sql_id();
 	ulint	i;
 	std::string	str;
 
-	if (strchr(foreign->id, '/')) {
-		/* Strip the preceding database name from the constraint id */
-		stripped_id = foreign->id + 1
-			+ dict_get_db_name_len(foreign->id);
-	} else {
-		stripped_id = foreign->id;
-	}
-
 	str.append(",");
 
 	if (add_newline) {
@@ -3733,7 +3504,7 @@ dict_print_info_on_foreign_key_in_create_format(const trx_t *trx,
 
 	str.append(" CONSTRAINT ");
 
-	str.append(innobase_quote_identifier(trx, stripped_id));
+	str.append(innobase_quote_identifier(trx, id));
 	str.append(" FOREIGN KEY (");
 
 	for (i = 0;;) {

storage/innobase/fts/fts0fts.cc

@@ -1504,10 +1504,6 @@ fts_rename_aux_tables(
 			err = fts_rename_one_aux_table(
 				new_name, old_table_name, trx);
 
-			DBUG_EXECUTE_IF("fts_rename_failure",
-					err = DB_DEADLOCK;
-					fts_sql_rollback(trx););
-
 			if (err != DB_SUCCESS) {
 				return(err);
 			}

storage/innobase/handler/ha_innodb.cc

@@ -2354,30 +2354,6 @@ dtype_get_mblen(
 	}
 }
 
-/**********************************************************************
-Check if the length of the identifier exceeds the maximum allowed.
-return true when length of identifier is too long. */
-my_bool
-innobase_check_identifier_length(
-/*=============================*/
-	const char*	id)	/* in: FK identifier to check excluding the
-				database portion. */
-{
-	int		well_formed_error = 0;
-	CHARSET_INFO	*cs = system_charset_info;
-	DBUG_ENTER("innobase_check_identifier_length");
-
-	size_t len = my_well_formed_length(
-		cs, id, id + strlen(id),
-		NAME_CHAR_LEN, &well_formed_error);
-
-	if (well_formed_error || len == NAME_CHAR_LEN) {
-		my_error(ER_TOO_LONG_IDENT, MYF(0), id);
-		DBUG_RETURN(true);
-	}
-	DBUG_RETURN(false);
-}
-
 /******************************************************************//**
 Converts an identifier to UTF-8. */
 void
@@ -12315,6 +12291,40 @@ LEX_CSTRING innodb_convert_name(CHARSET_INFO *cs, LEX_CSTRING name, char *buf)
                                      buf, MAX_TABLE_NAME_LEN, &errors)};
 }
 
+/** Find an auto-generated foreign key constraint identifier.
+@param table   InnoDB table
+@return the next number to assign to a constraint */
+ulint dict_table_get_foreign_id(const dict_table_t &table) noexcept
+{
+  ulint id= 0;
+
+  for (const dict_foreign_t *foreign : table.foreign_set)
+  {
+    const char *s= foreign->sql_id();
+    char *endp;
+    ulint f= strtoul(s, &endp, 10);
+    if (!*endp && f > id)
+      id= f;
+  }
+
+  return id + 1;
+}
+
+/** Generate a foreign key constraint name for an anonymous constraint.
+@param id_nr    sequence to allocate identifiers from
+@param name     table name
+@param foreign  foreign key */
+void dict_create_add_foreign_id(ulint *id_nr, const char *name,
+                                dict_foreign_t *foreign) noexcept
+{
+  if (!foreign->id)
+  {
+    size_t len= snprintf(nullptr, 0, "%s\377%zu", name, *id_nr);
+    foreign->id= static_cast<char*>(mem_heap_alloc(foreign->heap, len + 1));
+    snprintf(foreign->id, len + 1, "%s\377%zu", name, (*id_nr)++);
+  }
+}
+
 /** Create InnoDB foreign keys from MySQL alter_info. Collect all
 dict_foreign_t items into local_fk_set and then add into system table.
 @return		DB_SUCCESS or specific error code */
@@ -12352,12 +12362,6 @@ create_table_info_t::create_foreign_keys()
 		dict_table_t* alter_table;
 		char* n = dict_table_lookup(d, t, &alter_table, heap);
 
-		/* Starting from 4.0.18 and 4.1.2, we generate foreign key id's
-		in the format databasename/tablename_ibfk_[number], where
-		[number] is local to the table; look for the highest [number]
-		for alter_table, so that we can assign to new constraints
-		higher numbers. */
-
 		/* If we are altering a temporary table, the table name after
 		ALTER TABLE does not correspond to the internal table name, and
 		alter_table=nullptr. But, we do not support FOREIGN KEY
@@ -12365,8 +12369,7 @@ create_table_info_t::create_foreign_keys()
 
 		if (alter_table) {
 			n = alter_table->name.m_name;
-			number = 1 + dict_table_get_highest_foreign_id(
+			number = dict_table_get_foreign_id(*alter_table);
-				alter_table);
 		}
 
 		char* bufend = innobase_convert_name(
@@ -12478,33 +12481,17 @@ create_table_info_t::create_foreign_keys()
 			return (DB_CANNOT_ADD_CONSTRAINT);
 		}
 
-		if (fk->constraint_name.str) {
+		if (size_t fk_len = fk->constraint_name.length) {
-			ulint db_len;
+			/* Prepend the table name to the constraint name. */
-
+			size_t s = strlen(table->name.m_name) + 2 + fk_len;
-			/* Catenate 'databasename/' to the constraint name
+			foreign->id = static_cast<char*>(
-			specified by the user: we conceive the constraint as
+				mem_heap_alloc(foreign->heap, s));
-			belonging to the same MySQL 'database' as the table
+			snprintf(foreign->id, s, "%s\377%.*s",
-			itself. We store the name to foreign->id. */
+				 table->name.m_name, int(fk_len),
-
+				 fk->constraint_name.str);
-			db_len = dict_get_db_name_len(table->name.m_name);
+		} else {
-
+			dict_create_add_foreign_id(&number, table->name.m_name,
-			foreign->id = static_cast<char*>(mem_heap_alloc(
+                                                   foreign);
-				foreign->heap,
-				db_len + fk->constraint_name.length + 2));
-
-			memcpy(foreign->id, table->name.m_name, db_len);
-			foreign->id[db_len] = '/';
-			strcpy(foreign->id + db_len + 1,
-			       fk->constraint_name.str);
-		}
-
-		if (foreign->id == NULL) {
-			error = dict_create_add_foreign_id(
-				&number, table->name.m_name, foreign);
-			if (error != DB_SUCCESS) {
-				dict_foreign_free(foreign);
-				return (error);
-			}
 		}
 
 		std::pair<dict_foreign_set::iterator, bool> ret
@@ -14286,18 +14273,24 @@ ha_innobase::rename_table(
 		stats.close();
 	}
 
-	if (error == DB_DUPLICATE_KEY) {
+	switch (error) {
+	case DB_SUCCESS:
+		DBUG_RETURN(0);
+	case DB_DUPLICATE_KEY:
 		/* We are not able to deal with handler::get_dup_key()
 		during DDL operations, because the duplicate key would
 		exist in metadata tables, not in the user table. */
 		my_error(ER_TABLE_EXISTS_ERROR, MYF(0), to);
 		DBUG_RETURN(HA_ERR_GENERIC);
-	} else if (error == DB_LOCK_WAIT_TIMEOUT) {
+	case DB_LOCK_WAIT_TIMEOUT:
 		my_error(ER_LOCK_WAIT_TIMEOUT, MYF(0));
 		DBUG_RETURN(HA_ERR_GENERIC);
+	case DB_FOREIGN_DUPLICATE_KEY:
+		my_error(ER_DUP_CONSTRAINT_NAME, MYF(0), "FOREIGN KEY", "");
+		DBUG_RETURN(HA_ERR_GENERIC);
+	default:
+		DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
 	}
-
-	DBUG_RETURN(convert_error_code_to_mysql(error, 0, NULL));
 }
 
 /*********************************************************************//**
@@ -15653,14 +15646,13 @@ get_foreign_key_info(
 	size_t			len;
 	char			tmp_buff[NAME_LEN+1];
 	char			name_buff[NAME_LEN+1];
-	const char*		ptr;
+	const char*		ptr = foreign->sql_id();
 	LEX_CSTRING*		name = NULL;
 
 	if (dict_table_t::is_temporary_name(foreign->foreign_table_name)) {
- 		return NULL;
+		return NULL;
- 	}
+	}
 
-	ptr = dict_remove_db_name(foreign->id);
 	f_key_info.foreign_id = thd_make_lex_string(
 		thd, 0, ptr, strlen(ptr), 1);
 

storage/innobase/handler/ha_innodb.h

@@ -946,3 +946,15 @@ ib_push_frm_error(
 @return true if index column length exceeds limit */
 MY_ATTRIBUTE((warn_unused_result))
 bool too_big_key_part_length(size_t max_field_len, const KEY& key);
+
+/** Find an auto-generated foreign key constraint identifier.
+@param table   InnoDB table
+@return the next number to assign to a constraint */
+ulint dict_table_get_foreign_id(const dict_table_t &table) noexcept;
+
+/** Generate a foreign key constraint name for an anonymous constraint.
+@param id_nr    sequence to allocate identifiers from
+@param name     table name
+@param foreign  foreign key */
+void dict_create_add_foreign_id(ulint *id_nr, const char *name,
+                                dict_foreign_t *foreign) noexcept;

storage/innobase/handler/handler0alter.cc

@@ -2889,21 +2889,13 @@ innobase_init_foreign(
 	ut_ad(dict_sys.locked());
 
         if (constraint_name) {
-                ulint   db_len;
+                /* Prepend the table name to the constraint name. */
-
+		size_t s = 1 + snprintf(nullptr, 0, "%s\377%s",
-                /* Catenate 'databasename/' to the constraint name specified
+					table->name.m_name, constraint_name);
-                by the user: we conceive the constraint as belonging to the
+		foreign->id = static_cast<char*>(
-                same MySQL 'database' as the table itself. We store the name
+			mem_heap_alloc(foreign->heap, s));
-                to foreign->id. */
+		snprintf(foreign->id, s, "%s\377%s",
-
+			 table->name.m_name, constraint_name);
-                db_len = dict_get_db_name_len(table->name.m_name);
-
-                foreign->id = static_cast<char*>(mem_heap_alloc(
-                        foreign->heap, db_len + strlen(constraint_name) + 2));
-
-                memcpy(foreign->id, table->name.m_name, db_len);
-                foreign->id[db_len] = '/';
-                strcpy(foreign->id + db_len + 1, constraint_name);
 
 		/* Check if any existing foreign key has the same id,
 		this is needed only if user supplies the constraint name */
@@ -3298,7 +3290,8 @@ innobase_get_foreign_key_info(
 			num_col = i;
 		}
 
-		add_fk[num_fk] = dict_mem_foreign_create();
+		dict_foreign_t* const fk = add_fk[num_fk]
+			= dict_mem_foreign_create();
 
 		LEX_CSTRING t = innodb_convert_name(cs, fk_key->ref_table,
 						    t_name);
@@ -3308,7 +3301,7 @@ innobase_get_foreign_key_info(
 		dict_sys.lock(SRW_LOCK_CALL);
 
 		referenced_table_name = dict_table_lookup(
-			d, t, &referenced_table, add_fk[num_fk]->heap);
+			d, t, &referenced_table, fk->heap);
 
 		/* Test the case when referenced_table failed to
 		open, if trx->check_foreigns is not set, we should
@@ -3367,8 +3360,19 @@ innobase_get_foreign_key_info(
 			goto err_exit_unlock;
 		}
 
+		/* If fk_key->name.str==nullptr, we will end up with
+		fk->id=nullptr. In the calls to my_error() below,
+		passing nullptr to "%s" is fine; process_str_arg()
+		will display "(null)".
+
+		Anonymous constraints (fk->id=nullptr) will be
+		assigned a name in dict_create_add_foreign_id(), which
+		is invoked by innobase_update_foreing_try().
+
+		In check_col_is_in_fk_indexes(), errors in anonymous
+		contraints will be attributed to a constraint name "0". */
 		if (!innobase_init_foreign(
-			    add_fk[num_fk], fk_key->name.str,
+			    fk, fk_key->name.str,
 			    table, index, column_names,
 			    num_col, referenced_table_name,
 			    referenced_table, referenced_index,
@@ -3376,14 +3380,13 @@ innobase_get_foreign_key_info(
 			my_error(
 				ER_DUP_CONSTRAINT_NAME,
 				MYF(0),
-                                "FOREIGN KEY", add_fk[num_fk]->id);
+				"FOREIGN KEY", fk_key->name.str);
 			goto err_exit_unlock;
 		}
 
 		dict_sys.unlock();
 
-		correct_option = innobase_set_foreign_key_option(
+		correct_option = innobase_set_foreign_key_option(fk, fk_key);
-			add_fk[num_fk], fk_key);
 
 		DBUG_EXECUTE_IF("innodb_test_wrong_fk_option",
 				correct_option = false;);
@@ -3392,12 +3395,11 @@ innobase_get_foreign_key_info(
 			my_error(ER_FK_INCORRECT_OPTION,
 				 MYF(0),
 				 table_share->table_name.str,
-				 add_fk[num_fk]->id);
+				 fk_key->name.str);
 			goto err_exit;
 		}
 
-		if (innobase_check_fk_stored(
+		if (innobase_check_fk_stored(fk, table, s_cols)) {
-			add_fk[num_fk], table, s_cols)) {
 			my_printf_error(
 				HA_ERR_UNSUPPORTED,
 				"Cannot add foreign key on the base column "
@@ -3415,8 +3417,8 @@ err_exit_unlock:
 	dict_sys.unlock();
 err_exit:
 	for (ulint i = 0; i <= num_fk; i++) {
-		if (add_fk[i]) {
+		if (dict_foreign_t* fk = add_fk[i]) {
-			dict_foreign_free(add_fk[i]);
+			dict_foreign_free(fk);
 		}
 	}
 
@@ -4484,9 +4486,7 @@ bool check_foreigns_nullability(const dict_table_t *user_table,
             && foreign->col_fk_exists(col_name) != UINT_MAX)
         {
 non_null_error:
-          const char* fid = strchr(foreign->id, '/');
+          my_error(ER_FK_COLUMN_NOT_NULL, MYF(0), col_name, foreign->sql_id());
-          fid= fid ? fid + 1 : foreign->id;
-          my_error(ER_FK_COLUMN_NOT_NULL, MYF(0), col_name, fid);
           return true;
         }
       }
@@ -4522,10 +4522,8 @@ non_null_error:
                     dblen, foreign->foreign_table_name, tbl_name);
 
         display_name[FN_REFLEN - 1]= '\0';
-        const char* fid = strchr(foreign->id, '/');
-        fid= fid ? fid + 1 : foreign->id;
         my_error(ER_FK_COLUMN_CANNOT_CHANGE_CHILD, MYF(0), col_name,
-                 fid, display_name);
+                 foreign->sql_id(), display_name);
         return true;
       }
     }
@@ -4560,7 +4558,7 @@ bool check_foreign_drop_col(const dict_table_t *user_table,
       if (!strcmp(foreign->foreign_col_names[f], col_name))
       {
         my_error(ER_FK_COLUMN_CANNOT_DROP, MYF(0),
-                 col_name, foreign->id);
+                 col_name, foreign->sql_id());
         return true;
       }
   }
@@ -7883,9 +7881,9 @@ bool check_col_is_in_fk_indexes(
   span<const dict_foreign_t *> drop_fk,
   span<const dict_foreign_t *> add_fk)
 {
-  char *fk_id= nullptr;
+  const dict_foreign_t *fk;
 
-  for (const auto &f : table->foreign_set)
+  for (const auto f : table->foreign_set)
   {
     if (!f->foreign_index ||
         std::find(drop_fk.begin(), drop_fk.end(), f) != drop_fk.end())
@@ -7893,25 +7891,25 @@ bool check_col_is_in_fk_indexes(
     for (ulint i= 0; i < f->n_fields; i++)
       if (f->foreign_index->fields[i].col == col)
       {
-        fk_id= f->id;
+        fk= f;
         goto err_exit;
       }
   }
 
-  for (const auto &a : add_fk)
+  for (const auto a : add_fk)
   {
     if (!a->foreign_index) continue;
     for (ulint i= 0; i < a->n_fields; i++)
     {
       if (a->foreign_index->fields[i].col == col)
       {
-        fk_id= a->id;
+        fk= a;
         goto err_exit;
       }
     }
   }
 
-  for (const auto &f : table->referenced_set)
+  for (const auto f : table->referenced_set)
   {
     if (!f->referenced_index) continue;
     for (ulint i= 0; i < f->n_fields; i++)
@@ -7919,7 +7917,7 @@ bool check_col_is_in_fk_indexes(
       if (f->referenced_index->fields[i].col == col)
       {
         my_error(ER_FK_COLUMN_CANNOT_CHANGE_CHILD, MYF(0),
-                 col_name, f->id, f->foreign_table_name);
+                 col_name, f->sql_id(), f->foreign_table_name);
         return true;
       }
     }
@@ -7927,8 +7925,7 @@ bool check_col_is_in_fk_indexes(
   return false;
 err_exit:
   my_error(ER_FK_COLUMN_CANNOT_CHANGE, MYF(0), col_name,
-           fk_id ? fk_id :
+           fk->id ? fk->sql_id() : "0");
-	   (std::string(table->name.m_name) + "_ibfk_0").c_str());
   return true;
 }
 
@@ -8289,22 +8286,11 @@ check_if_ok_to_rename:
 
 			dict_foreign_t* foreign;
 
-			for (dict_foreign_set::iterator it
+			for (dict_foreign_t* fk : m_prebuilt->table->foreign_set) {
-				= m_prebuilt->table->foreign_set.begin();
+				if (Lex_ident_column(Lex_cstring_strlen
-			     it != m_prebuilt->table->foreign_set.end();
+						     (fk->sql_id())).
-			     ++it) {
+				    streq(drop.name)) {
-
+					foreign = fk;
-				foreign = *it;
-				const char* fid = strchr(foreign->id, '/');
-
-				DBUG_ASSERT(fid);
-				/* If no database/ prefix was present in
-				the FOREIGN KEY constraint name, compare
-				to the full constraint name. */
-				fid = fid ? fid + 1 : foreign->id;
-
-				if (Lex_ident_column(Lex_cstring_strlen(fid)).
-				      streq(drop.name)) {
 					goto found_fk;
 				}
 			}
@@ -10051,14 +10037,11 @@ innobase_update_foreign_try(
 	trx_t*			trx,
 	const char*		table_name)
 {
-	ulint	foreign_id;
 	ulint	i;
 
 	DBUG_ENTER("innobase_update_foreign_try");
 
-	foreign_id = dict_table_get_highest_foreign_id(ctx->new_table);
+	ulint foreign_id = dict_table_get_foreign_id(*ctx->new_table);
-
-	foreign_id++;
 
 	for (i = 0; i < ctx->num_to_add_fk; i++) {
 		dict_foreign_t*		fk = ctx->add_fk[i];
@@ -10066,14 +10049,9 @@ innobase_update_foreign_try(
 		ut_ad(fk->foreign_table == ctx->new_table
 		      || fk->foreign_table == ctx->old_table);
 
-		dberr_t error = dict_create_add_foreign_id(
+		dict_create_add_foreign_id(
 			&foreign_id, ctx->old_table->name.m_name, fk);
-
+		/* After this point, it is safe to call fk->sql_id(). */
-		if (error != DB_SUCCESS) {
-			my_error(ER_TOO_LONG_IDENT, MYF(0),
-				 fk->id);
-			DBUG_RETURN(true);
-		}
 
 		if (!fk->foreign_index) {
 			fk->foreign_index = dict_foreign_find_index(
@@ -10086,7 +10064,7 @@ innobase_update_foreign_try(
 				NULL, NULL, NULL);
 			if (!fk->foreign_index) {
 				my_error(ER_FK_INCORRECT_OPTION,
-					 MYF(0), table_name, fk->id);
+					 MYF(0), table_name, fk->sql_id());
 				DBUG_RETURN(true);
 			}
 		}
@@ -10094,7 +10072,7 @@ innobase_update_foreign_try(
 		/* The fk->foreign_col_names[] uses renamed column
 		names, while the columns in ctx->old_table have not
 		been renamed yet. */
-		error = dict_create_add_foreign_to_dictionary(
+		dberr_t error = dict_create_add_foreign_to_dictionary(
 			ctx->old_table->name.m_name, fk, trx);
 
 		DBUG_EXECUTE_IF(

storage/innobase/handler/i_s.cc

@@ -5742,7 +5742,7 @@ i_s_dict_fill_sys_foreign(
 
 	fields = table_to_fill->field;
 
-	OK(field_store_string(fields[SYS_FOREIGN_ID], foreign->id));
+	OK(field_store_string(fields[SYS_FOREIGN_ID], foreign->sql_id()));
 
 	OK(field_store_string(fields[SYS_FOREIGN_FOR_NAME],
 			      foreign->foreign_table_name));
@@ -5934,8 +5934,11 @@ i_s_dict_fill_sys_foreign_cols(
 	DBUG_ENTER("i_s_dict_fill_sys_foreign_cols");
 
 	fields = table_to_fill->field;
+	const char* id = strchr(name, '\377');
+	if (!id) id = strchr(name, '/');
+	id = id ? id + 1 : name;
 
-	OK(field_store_string(fields[SYS_FOREIGN_COL_ID], name));
+	OK(field_store_string(fields[SYS_FOREIGN_COL_ID], id));
 
 	OK(field_store_string(fields[SYS_FOREIGN_COL_FOR_NAME], for_col_name));
 

storage/innobase/include/dict0crea.h

@@ -117,20 +117,6 @@ dict_create_index_tree_in_mem(
 	dict_index_t*	index,		/*!< in/out: index */
 	const trx_t*	trx);		/*!< in: InnoDB transaction handle */
 
-/********************************************************************//**
-Generate a foreign key constraint name when it was not named by the user.
-A generated constraint has a name of the format dbname/tablename_ibfk_NUMBER,
-where the numbers start from 1, and are given locally for this table, that is,
-the number is not global, as it used to be before MySQL 4.0.18.  */
-UNIV_INLINE
-dberr_t
-dict_create_add_foreign_id(
-/*=======================*/
-	ulint*		id_nr,		/*!< in/out: number to use in id
-					generation; incremented if used */
-	const char*	name,		/*!< in: table name */
-	dict_foreign_t*	foreign);	/*!< in/out: foreign key */
-
 /** Adds the given set of foreign key objects to the dictionary tables
 in the database. This function does not modify the dictionary cache. The
 caller must ensure that all foreign key objects contain a valid constraint

storage/innobase/include/dict0crea.inl

@@ -24,75 +24,6 @@ Database object creation
 Created 1/8/1996 Heikki Tuuri
 *******************************************************/
 
-#include "ha_prototypes.h"
-
-#include "mem0mem.h"
-
-/********************************************************************//**
-Generate a foreign key constraint name when it was not named by the user.
-A generated constraint has a name of the format dbname/tablename_ibfk_NUMBER,
-where the numbers start from 1, and are given locally for this table, that is,
-the number is not global, as it used to be before MySQL 4.0.18.  */
-UNIV_INLINE
-dberr_t
-dict_create_add_foreign_id(
-/*=======================*/
-	ulint*		id_nr,	/*!< in/out: number to use in id generation;
-				incremented if used */
-	const char*	name,	/*!< in: table name */
-	dict_foreign_t*	foreign)/*!< in/out: foreign key */
-{
-	DBUG_ENTER("dict_create_add_foreign_id");
-
-	if (foreign->id == NULL) {
-		/* Generate a new constraint id */
-		ulint	namelen	= strlen(name);
-		char*	id	= static_cast<char*>(
-					mem_heap_alloc(foreign->heap,
-						       namelen + 20));
-
-		if (dict_table_t::is_temporary_name(name)) {
-
-			/* no overflow if number < 1e13 */
-			sprintf(id, "%s_ibfk_%lu", name,
-				(ulong) (*id_nr)++);
-		} else {
-			char	table_name[MAX_TABLE_NAME_LEN + 21];
-			uint	errors = 0;
-
-			strncpy(table_name, name, (sizeof table_name) - 1);
-			table_name[(sizeof table_name) - 1] = '\0';
-
-			innobase_convert_to_system_charset(
-				strchr(table_name, '/') + 1,
-				strchr(name, '/') + 1,
-				MAX_TABLE_NAME_LEN, &errors);
-
-			if (errors) {
-				strncpy(table_name, name,
-					(sizeof table_name) - 1);
-				table_name[(sizeof table_name) - 1] = '\0';
-			}
-
-			/* no overflow if number < 1e13 */
-			sprintf(id, "%s_ibfk_%lu", table_name,
-				(ulong) (*id_nr)++);
-
-			if (innobase_check_identifier_length(
-				strchr(id,'/') + 1)) {
-				DBUG_RETURN(DB_IDENTIFIER_TOO_LONG);
-			}
-		}
-		foreign->id = id;
-
-		DBUG_PRINT("dict_create_add_foreign_id",
-			   ("generated foreign id: %s", id));
-	}
-
-
-	DBUG_RETURN(DB_SUCCESS);
-}
-
 /** Compose a column number for a virtual column, stored in the "POS" field
 of Sys_columns. The column number includes both its virtual column sequence
 (the "nth" virtual column) and its actual column position in original table

storage/innobase/include/dict0dict.h

@@ -61,16 +61,6 @@ void
 dict_foreign_free(
 /*==============*/
 	dict_foreign_t*	foreign);	/*!< in, own: foreign key struct */
-/*********************************************************************//**
-Finds the highest [number] for foreign key constraints of the table. Looks
-only at the >= 4.0.18-format id's, which are of the form
-databasename/tablename_ibfk_[number].
-@return highest number, 0 if table has no new format foreign key constraints */
-ulint
-dict_table_get_highest_foreign_id(
-/*==============================*/
-	dict_table_t*	table);		/*!< in: table in the dictionary
-					memory cache */
 /** Check whether the dict_table_t is a partition.
 A partitioned table on the SQL level is composed of InnoDB tables,
 where each InnoDB table is a [sub]partition including its secondary indexes

storage/innobase/include/dict0mem.h

@@ -1671,6 +1671,18 @@ public:
     }
     return true;
   }
+
+  /** @return the SQL visible constraint name */
+  const char *sql_id() const noexcept
+  {
+    /* Before MySQL 4.0.18, constraint names were auto-generated (%lu_%lu)
+    and unique among all InnoDB tables.  Starting with MySQL 4.0.18, the
+    constraint names were prepended with the schema name and /.
+    Starting with MariaDB 12, constraint names are prepended with the
+    dict_table_t::name and the invalid UTF-8 sequence 0xff. */
+    const char *s;
+    return ((s= strchr(id, '\377')) || (s= strchr(id, '/'))) ? ++s : id;
+  }
 };
 
 std::ostream&
@@ -1730,33 +1742,6 @@ struct dict_foreign_different_tables {
 	}
 };
 
-/** A function object to check if the foreign key constraint has the same
-name as given.  If the full name of the foreign key constraint doesn't match,
-then, check if removing the database name from the foreign key constraint
-matches. Return true if it matches, false otherwise. */
-struct dict_foreign_matches_id {
-
-	dict_foreign_matches_id(const char* id)
-		: m_id(id)
-	{}
-
-	bool operator()(const dict_foreign_t*	foreign) const
-	{
-		const Lex_ident_column ident = Lex_cstring_strlen(m_id);
-		if (ident.streq(Lex_cstring_strlen(foreign->id))) {
-			return(true);
-		}
-		if (const char* pos = strchr(foreign->id, '/')) {
-			if (ident.streq(Lex_cstring_strlen(pos + 1))) {
-				return(true);
-			}
-		}
-		return(false);
-	}
-
-	const char*	m_id;
-};
-
 typedef std::set<
 	dict_foreign_t*,
 	dict_foreign_compare,

storage/innobase/include/ha_prototypes.h

@@ -347,16 +347,6 @@ innobase_next_autoinc(
 	ulonglong	max_value)	/*!< in: max value for type */
 	MY_ATTRIBUTE((pure, warn_unused_result));
 
-/**********************************************************************
-Check if the length of the identifier exceeds the maximum allowed.
-The input to this function is an identifier in charset my_charset_filename.
-return true when length of identifier is too long. */
-my_bool
-innobase_check_identifier_length(
-/*=============================*/
-	const char*	id);	/* in: identifier to check.  it must belong
-				to charset my_charset_filename */
-
 /**********************************************************************
 Converts an identifier from my_charset_filename to UTF-8 charset. */
 uint

storage/innobase/row/row0mysql.cc

@@ -2502,29 +2502,28 @@ dberr_t
 row_delete_constraint(
 /*==================*/
 	const char*	id,		/*!< in: constraint id */
-	const char*	database_name,	/*!< in: database name, with the
+	const char*	name,		/*!< in: table name */
-					trailing '/' */
 	mem_heap_t*	heap,		/*!< in: memory heap */
 	trx_t*		trx)		/*!< in: transaction handle */
 {
-	dberr_t	err;
+  const size_t s= strlen(id) + strlen(name) + 2;
+  char *fk= static_cast<char*>(mem_heap_alloc(heap, s));
+  snprintf(fk, s, "%s\377%s", name, id);
+  dberr_t err= row_delete_constraint_low(fk, trx);
+  if (err == DB_SUCCESS)
+  {
+    /* Also try dropping the MySQL 4.0.18 or 4.1.2 constraints,
+    with schemaname/constraintname. */
+    snprintf(fk, s, "%.*s%s", int(dict_get_db_name_len(name) + 1), name, id);
+    err= row_delete_constraint_low(fk, trx);
+  }
+  if (err == DB_SUCCESS && !strchr(id, '/'))
+    /* Before MySQL 4.0.18 or 4.1.2, constraints were of the form
+    %lu_%lu (a 64-bit global identifier split into two 32-bit
+    parts). Let them be dropped. */
+    err= row_delete_constraint_low(id, trx);
 
-	/* New format constraints have ids <databasename>/<constraintname>. */
+  return err;
-	err = row_delete_constraint_low(
-		mem_heap_strcat(heap, database_name, id), trx);
-
-	if ((err == DB_SUCCESS) && !strchr(id, '/')) {
-		/* Old format < 4.0.18 constraints have constraint ids
-		NUMBER_NUMBER. We only try deleting them if the
-		constraint name does not contain a '/' character, otherwise
-		deleting a new format constraint named 'foo/bar' from
-		database 'baz' would remove constraint 'bar' from database
-		'foo', if it existed. */
-
-		err = row_delete_constraint_low(id, trx);
-	}
-
-	return(err);
 }
 
 /*********************************************************************//**
@@ -2664,132 +2663,49 @@ row_rename_table_for_mysql(
 	if (err != DB_SUCCESS) {
 		// Assume the caller guarantees destination name doesn't exist.
 		ut_ad(err != DB_DUPLICATE_KEY);
-		goto rollback_and_exit;
+	} else if (/* fk == RENAME_IGNORE_FK || */ !new_is_tmp) {
-	}
-
-	if (/* fk == RENAME_IGNORE_FK || */ !new_is_tmp) {
 		/* Rename all constraints. */
-		char	new_table_name[MAX_TABLE_NAME_LEN + 1];
-		char	old_table_utf8[MAX_TABLE_NAME_LEN + 1];
-		uint	errors = 0;
-
-		strncpy(old_table_utf8, old_name, MAX_TABLE_NAME_LEN);
-		old_table_utf8[MAX_TABLE_NAME_LEN] = '\0';
-		innobase_convert_to_system_charset(
-			strchr(old_table_utf8, '/') + 1,
-			strchr(old_name, '/') +1,
-			MAX_TABLE_NAME_LEN, &errors);
-
-		if (errors) {
-			/* Table name could not be converted from charset
-			my_charset_filename to UTF-8. This means that the
-			table name is already in UTF-8 (#mysql#50). */
-			strncpy(old_table_utf8, old_name, MAX_TABLE_NAME_LEN);
-			old_table_utf8[MAX_TABLE_NAME_LEN] = '\0';
-		}
-
 		info = pars_info_create();
 
-		pars_info_add_str_literal(info, "new_table_name", new_name);
+		pars_info_add_str_literal(info, "new_name", new_name);
-		pars_info_add_str_literal(info, "old_table_name", old_name);
+		pars_info_add_str_literal(info, "old_name", old_name);
-		pars_info_add_str_literal(info, "old_table_name_utf8",
-					  old_table_utf8);
-
-		strncpy(new_table_name, new_name, MAX_TABLE_NAME_LEN);
-		new_table_name[MAX_TABLE_NAME_LEN] = '\0';
-		innobase_convert_to_system_charset(
-			strchr(new_table_name, '/') + 1,
-			strchr(new_name, '/') +1,
-			MAX_TABLE_NAME_LEN, &errors);
-
-		if (errors) {
-			/* Table name could not be converted from charset
-			my_charset_filename to UTF-8. This means that the
-			table name is already in UTF-8 (#mysql#50). */
-			strncpy(new_table_name, new_name, MAX_TABLE_NAME_LEN);
-			new_table_name[MAX_TABLE_NAME_LEN] = '\0';
-		}
-
-		pars_info_add_str_literal(info, "new_table_utf8", new_table_name);
 
 		err = que_eval_sql(
 			info,
 			"PROCEDURE RENAME_CONSTRAINT_IDS () IS\n"
-			"gen_constr_prefix CHAR;\n"
+			"old CHAR; new CHAR; found INT; p INT;\n"
-			"new_db_name CHAR;\n"
-			"foreign_id CHAR;\n"
-			"new_foreign_id CHAR;\n"
-			"old_db_name_len INT;\n"
-			"old_t_name_len INT;\n"
-			"new_db_name_len INT;\n"
-			"id_len INT;\n"
-			"offset INT;\n"
-			"found INT;\n"
 			"BEGIN\n"
 			"found := 1;\n"
-			"old_db_name_len := INSTR(:old_table_name, '/')-1;\n"
-			"new_db_name_len := INSTR(:new_table_name, '/')-1;\n"
-			"new_db_name := SUBSTR(:new_table_name, 0,\n"
-			"                      new_db_name_len);\n"
-			"old_t_name_len := LENGTH(:old_table_name);\n"
-			"gen_constr_prefix := CONCAT(:old_table_name_utf8,\n"
-			"                            '_ibfk_');\n"
 			"WHILE found = 1 LOOP\n"
-			"       SELECT ID INTO foreign_id\n"
+			"  SELECT ID INTO old FROM SYS_FOREIGN\n"
-			"        FROM SYS_FOREIGN\n"
+			"  WHERE FOR_NAME = :old_name\n"
-			"        WHERE FOR_NAME = :old_table_name\n"
+			"  AND TO_BINARY(FOR_NAME)=TO_BINARY(:old_name)\n"
-			"         AND TO_BINARY(FOR_NAME)\n"
+			"  LOCK IN SHARE MODE;\n"
-			"           = TO_BINARY(:old_table_name)\n"
+			"  IF (SQL % NOTFOUND) THEN\n"
-			"         LOCK IN SHARE MODE;\n"
+			"    found := 0;\n"
-			"       IF (SQL % NOTFOUND) THEN\n"
+			"  ELSE\n"
-			"        found := 0;\n"
+			"    p := INSTR(old, '\377');\n"
-			"       ELSE\n"
+			"    IF p = 0 THEN p := INSTR(old, '/'); END IF;\n"
-			"        UPDATE SYS_FOREIGN\n"
+			"    new:=CONCAT(:new_name,'\377',\n"
-			"        SET FOR_NAME = :new_table_name\n"
+			"                SUBSTR(old,p,LENGTH(old)-1));\n"
-			"         WHERE ID = foreign_id;\n"
+			"    UPDATE SYS_FOREIGN\n"
-			"        id_len := LENGTH(foreign_id);\n"
+			"    SET ID=new, FOR_NAME=:new_name WHERE ID=old;\n"
-			"        IF (INSTR(foreign_id, '/') > 0) THEN\n"
+			"    UPDATE SYS_FOREIGN_COLS\n"
-			"               IF (INSTR(foreign_id,\n"
+			"    SET ID=new WHERE ID=old;\n"
-			"                         gen_constr_prefix) > 0)\n"
+			"  END IF;\n"
-			"               THEN\n"
-                        "                offset := INSTR(foreign_id, '_ibfk_') - 1;\n"
-			"                new_foreign_id :=\n"
-			"                CONCAT(:new_table_utf8,\n"
-			"                SUBSTR(foreign_id, offset,\n"
-			"                       id_len - offset));\n"
-			"               ELSE\n"
-			"                new_foreign_id :=\n"
-			"                CONCAT(new_db_name,\n"
-			"                SUBSTR(foreign_id,\n"
-			"                       old_db_name_len,\n"
-			"                       id_len - old_db_name_len));\n"
-			"               END IF;\n"
-			"               UPDATE SYS_FOREIGN\n"
-			"                SET ID = new_foreign_id\n"
-			"                WHERE ID = foreign_id;\n"
-			"               UPDATE SYS_FOREIGN_COLS\n"
-			"                SET ID = new_foreign_id\n"
-			"                WHERE ID = foreign_id;\n"
-			"        END IF;\n"
-			"       END IF;\n"
 			"END LOOP;\n"
-			"UPDATE SYS_FOREIGN SET REF_NAME = :new_table_name\n"
+			"UPDATE SYS_FOREIGN SET REF_NAME = :new_name\n"
-			"WHERE REF_NAME = :old_table_name\n"
+			"WHERE REF_NAME = :old_name\n"
-			"  AND TO_BINARY(REF_NAME)\n"
+			"AND TO_BINARY(REF_NAME)=TO_BINARY(:old_name);\n"
-			"    = TO_BINARY(:old_table_name);\n"
 			"END;\n", trx);
-
+		if (err == DB_DUPLICATE_KEY) {
+			err = DB_FOREIGN_DUPLICATE_KEY;
+		}
 	} else if (n_constraints_to_drop > 0) {
 		/* Drop some constraints of tmp tables. */
-
+		for (auto i = n_constraints_to_drop; i--; ) {
-		ulint	db_name_len = dict_get_db_name_len(old_name) + 1;
-		char*	db_name = mem_heap_strdupl(heap, old_name,
-						   db_name_len);
-		ulint	i;
-
-		for (i = 0; i < n_constraints_to_drop; i++) {
 			err = row_delete_constraint(constraints_to_drop[i],
-						    db_name, heap, trx);
+						    old_name, heap, trx);
 
 			if (err != DB_SUCCESS) {
 				break;
@@ -2799,34 +2715,20 @@ row_rename_table_for_mysql(
 
 	if (err == DB_SUCCESS
 	    && (dict_table_has_fts_index(table)
-	    || DICT_TF2_FLAG_IS_SET(table, DICT_TF2_FTS_HAS_DOC_ID))
+                || DICT_TF2_FLAG_IS_SET(table, DICT_TF2_FTS_HAS_DOC_ID))
-	    && !dict_tables_have_same_db(old_name, new_name)) {
+            && !dict_tables_have_same_db(old_name, new_name)) {
 		err = fts_rename_aux_tables(table, new_name, trx);
 	}
 
-	switch (err) {
+	if (err == DB_SUCCESS) {
-	case DB_DUPLICATE_KEY:
-		ib::error() << "Table rename might cause two"
-			" FOREIGN KEY constraints to have the same"
-			" internal name in case-insensitive comparison.";
-		ib::info() << TROUBLESHOOTING_MSG;
-		/* fall through */
-	rollback_and_exit:
-	default:
-		trx->error_state = DB_SUCCESS;
-		trx->rollback();
-		trx->error_state = DB_SUCCESS;
-		break;
-	case DB_SUCCESS:
 		DEBUG_SYNC_C("innodb_rename_in_cache");
 		/* The following call will also rename the .ibd file */
 		err = dict_table_rename_in_cache(
 			table, span<const char>{new_name,strlen(new_name)},
 			false);
-		if (err != DB_SUCCESS) {
+	}
-			goto rollback_and_exit;
-		}
 
+	if (err == DB_SUCCESS) {
 		/* In case of copy alter, template db_name and
 		table_name should be renamed only for newly
 		created table. */
@@ -2860,7 +2762,7 @@ row_rename_table_for_mysql(
 					" definition.";
 				if (!trx->check_foreigns) {
 					err = DB_SUCCESS;
-					break;
+					goto funct_exit;
 				}
 			} else {
 				ib::error() << "In RENAME TABLE table "
@@ -2869,29 +2771,23 @@ row_rename_table_for_mysql(
 					" constraints which are not compatible"
 					" with the new table definition.";
 			}
-
+		} else if (dict_foreigns_has_s_base_col(table->foreign_set,
-			goto rollback_and_exit;
+							table)) {
-		}
-
-		/* Check whether virtual column or stored column affects
-		the foreign key constraint of the table. */
-		if (dict_foreigns_has_s_base_col(table->foreign_set, table)) {
 			err = DB_NO_FK_ON_S_BASE_COL;
-			goto rollback_and_exit;
+		} else {
+			/* Fill the virtual column set in foreign when
+			the table undergoes copy alter operation. */
+			dict_mem_table_free_foreign_vcol_set(table);
+			dict_mem_table_fill_foreign_vcol_set(table);
+
+			while (!fk_tables.empty()) {
+				const char *f = fk_tables.front();
+				dict_sys.load_table({f, strlen(f)});
+				fk_tables.pop_front();
+			}
+
+			table->data_dir_path= NULL;
 		}
-
-		/* Fill the virtual column set in foreign when
-		the table undergoes copy alter operation. */
-		dict_mem_table_free_foreign_vcol_set(table);
-		dict_mem_table_fill_foreign_vcol_set(table);
-
-		while (!fk_tables.empty()) {
-			const char *f = fk_tables.front();
-			dict_sys.load_table({f, strlen(f)});
-			fk_tables.pop_front();
-		}
-
-		table->data_dir_path= NULL;
 	}
 
 funct_exit:

storage/myisam/mysql-test/storage_engine/foreign_keys.rdiff

@@ -5,11 +5,11 @@
    `a` int(11) DEFAULT NULL,
    `b` char(8) DEFAULT NULL,
 -  KEY `a` (`a`),
--  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
+-  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
 +  KEY `a` (`a`)
- ) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
+ ) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
  INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b');
--ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 +# ERROR: Statement succeeded (expected results: ER_NO_REFERENCED_ROW_2)
 +# ------------ UNEXPECTED RESULT ------------
 +# The statement|command succeeded unexpectedly.
@@ -21,7 +21,7 @@
  INSERT INTO t1 (a,b) VALUES (1,'c'),(2,'d');
  INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b');
  UPDATE t2 SET a=a+1;
--ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 +# ERROR: Statement succeeded (expected results: ER_NO_REFERENCED_ROW_2)
 +# ------------ UNEXPECTED RESULT ------------
 +# The statement|command succeeded unexpectedly.
@@ -31,10 +31,10 @@
 +# Also, this problem may cause a chain effect (more errors of different kinds in the test).
 +# -------------------------------------------
  UPDATE t1 SET a=3 WHERE a=2;
--ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 +# ERROR: Statement succeeded (expected results: ER_ROW_IS_REFERENCED_2)
  DELETE FROM t1 WHERE a=2;
--ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 +# ERROR: Statement succeeded (expected results: ER_ROW_IS_REFERENCED_2)
 +# ------------ UNEXPECTED RESULT ------------
 +# The statement|command succeeded unexpectedly.
@@ -72,11 +72,11 @@
    `a` int(11) DEFAULT NULL,
    `b` char(8) DEFAULT NULL,
 -  KEY `a` (`a`),
--  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE
+-  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE
 +  KEY `a` (`a`)
- ) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
+ ) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
  INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d');
--ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE)
+-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE)
 +# ERROR: Statement succeeded (expected results: ER_NO_REFERENCED_ROW_2)
  INSERT INTO t1 (a,b) VALUES (3,'a'),(4,'a');
 +ERROR 42S02: Table 'test.t1' doesn't exist
@@ -130,7 +130,7 @@
 +4	d
 +4	e
  TRUNCATE TABLE t1;
--ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`))
+-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`))
 +ERROR 42S02: Table 'test.t1' doesn't exist
 +# ERROR: Statement ended with errno 1146, errname ER_NO_SUCH_TABLE (expected results: ER_TRUNCATE_ILLEGAL_FK)
 +# ------------ UNEXPECTED RESULT ------------

storage/myisammrg/mysql-test/storage_engine/foreign_keys.rdiff

@@ -5,12 +5,12 @@
    `a` int(11) DEFAULT NULL,
    `b` char(8) DEFAULT NULL,
 -  KEY `a` (`a`),
--  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
+-  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)
--) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
+-) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 +  KEY `a` (`a`)
-+) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 INSERT_METHOD=LAST UNION=(`mrg`.`t2`)
++) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci INSERT_METHOD=LAST UNION=(`mrg`.`t2`)
  INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b');
--ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 +# ERROR: Statement succeeded (expected results: ER_NO_REFERENCED_ROW_2)
 +# ------------ UNEXPECTED RESULT ------------
 +# The statement|command succeeded unexpectedly.
@@ -22,7 +22,7 @@
  INSERT INTO t1 (a,b) VALUES (1,'c'),(2,'d');
  INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b');
  UPDATE t2 SET a=a+1;
--ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 +# ERROR: Statement succeeded (expected results: ER_NO_REFERENCED_ROW_2)
 +# ------------ UNEXPECTED RESULT ------------
 +# The statement|command succeeded unexpectedly.
@@ -32,10 +32,10 @@
 +# Also, this problem may cause a chain effect (more errors of different kinds in the test).
 +# -------------------------------------------
  UPDATE t1 SET a=3 WHERE a=2;
--ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 +# ERROR: Statement succeeded (expected results: ER_ROW_IS_REFERENCED_2)
  DELETE FROM t1 WHERE a=2;
--ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
+-ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`))
 +# ERROR: Statement succeeded (expected results: ER_ROW_IS_REFERENCED_2)
 +# ------------ UNEXPECTED RESULT ------------
 +# The statement|command succeeded unexpectedly.
@@ -73,12 +73,12 @@
    `a` int(11) DEFAULT NULL,
    `b` char(8) DEFAULT NULL,
 -  KEY `a` (`a`),
--  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE
+-  CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE
--) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1
+-) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
 +  KEY `a` (`a`)
-+) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 INSERT_METHOD=LAST UNION=(`mrg`.`t2`)
++) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci INSERT_METHOD=LAST UNION=(`mrg`.`t2`)
  INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d');
--ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE)
+-ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE)
 +# ERROR: Statement succeeded (expected results: ER_NO_REFERENCED_ROW_2)
  INSERT INTO t1 (a,b) VALUES (3,'a'),(4,'a');
 +ERROR 42S02: Table 'test.t1' doesn't exist
@@ -132,7 +132,7 @@
 +4	d
 +4	e
  TRUNCATE TABLE t1;
--ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`))
+-ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`))
 +ERROR 42S02: Table 'test.t1' doesn't exist
 +# ERROR: Statement ended with errno 1146, errname ER_NO_SUCH_TABLE (expected results: ER_TRUNCATE_ILLEGAL_FK)
 +# ------------ UNEXPECTED RESULT ------------