CREATE TABLE t1 (a INT PRIMARY KEY) ENGINE=InnoDB;
CREATE TABLE t2 (a INT PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t1 VALUES(0);
BEGIN;
DELETE FROM t1;
INSERT INTO t2 VALUES(1),(1);
ERROR 23000: Duplicate entry '1' for key 'PRIMARY'
BEGIN;
SELECT * FROM t2 LOCK IN SHARE MODE;
a
connect  con1,localhost,root,,;
SET innodb_lock_wait_timeout=0;
INSERT INTO t2 VALUES(2);
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
connection default;
ROLLBACK;
connection con1;
INSERT INTO t2 VALUES(3);
COMMIT;
disconnect con1;
connection default;
SELECT * FROM t1;
a
SELECT * FROM t2;
a
3
DROP TABLE t1, t2;
#
# MDEV-24700 Assertion "lock not found"==0 in lock_table_x_unlock()
#
SET FOREIGN_KEY_CHECKS=OFF;
CREATE TABLE t1 (id INT PRIMARY KEY, f INT REFERENCES nonexistent(x))
ENGINE=InnoDB;
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`))
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`))
COMMIT;
DROP TABLE t1;
#
# MDEV-25942 Assertion failed in trx_t::drop_table()
#
CREATE TABLE t1 (k INT PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t1 SET k=1;
START TRANSACTION;
INSERT INTO t1 SET k=2;
SELECT count(*) > 0 FROM mysql.innodb_index_stats lock in share mode;
count(*) > 0
1
connect  con1,localhost,root,,test;
SET innodb_lock_wait_timeout=0;
CREATE TABLE t2 (pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=InnoDB
AS SELECT k FROM t1;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
disconnect con1;
connection default;
SET innodb_lock_wait_timeout=default;
DROP TABLE t1;
DROP TABLE IF EXISTS t2;