--source include/have_innodb.inc
--source include/have_debug.inc
--source include/have_debug_sync.inc

CREATE TABLE parent (a INT PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO parent SET a=1;

CREATE TABLE child (a INT PRIMARY KEY, FOREIGN KEY (a) REFERENCES parent(a)
ON UPDATE CASCADE)
ENGINE=InnoDB;
INSERT INTO child SET a=1;

--error ER_TRUNCATE_ILLEGAL_FK
TRUNCATE TABLE parent;
TRUNCATE TABLE child;

INSERT INTO child SET a=1;
UPDATE parent SET a=2;
SELECT * FROM child;

connect (dml,localhost,root);
SET DEBUG_SYNC='foreign_constraint_update_cascade SIGNAL fk WAIT_FOR go';
send UPDATE parent SET a=3;

connection default;
SET DEBUG_SYNC='now WAIT_FOR fk';
SET lock_wait_timeout=1;
--error ER_LOCK_WAIT_TIMEOUT
TRUNCATE TABLE child;
SET DEBUG_SYNC='now SIGNAL go';

connection dml;
reap;
SELECT * FROM child;
SET DEBUG_SYNC='foreign_constraint_check_for_update SIGNAL fk WAIT_FOR go';
send DELETE FROM parent;

connection default;
SET DEBUG_SYNC='now WAIT_FOR fk';
SET lock_wait_timeout=1;
--error ER_LOCK_WAIT_TIMEOUT
TRUNCATE TABLE child;
SET DEBUG_SYNC='now SIGNAL go';

connection dml;
--error ER_ROW_IS_REFERENCED_2
reap;
SELECT * FROM child;
INSERT INTO parent SET a=5;
SET DEBUG_SYNC='foreign_constraint_check_for_ins SIGNAL fk WAIT_FOR go';
send INSERT INTO child SET a=5;

connection default;
SET DEBUG_SYNC='now WAIT_FOR fk';
SET foreign_key_checks=0;
TRUNCATE TABLE parent;
SET DEBUG_SYNC='now SIGNAL go';

connection dml;
--error ER_NO_REFERENCED_ROW_2
reap;
SELECT * FROM parent;
SELECT * FROM child;
disconnect dml;

connection default;
SET DEBUG_SYNC = RESET;

DROP TABLE child, parent;

--echo #
--echo # MDEV-24532 Table corruption ER_NO_SUCH_TABLE_IN_ENGINE or
--echo # ER_CRASHED_ON_USAGE after ALTER on table with foreign key
--echo #

CREATE TABLE t1 (a INT, b INT, PRIMARY KEY (a)) ENGINE=InnoDB;
ALTER TABLE t1 ADD FOREIGN KEY (b) REFERENCES t1 (a) ON UPDATE CASCADE;
LOCK TABLE t1 WRITE;
TRUNCATE TABLE t1;
ALTER TABLE t1 ADD c INT;
UNLOCK TABLES;
DROP TABLE t1;