| Server IP : 104.21.38.3 / Your IP : 162.158.88.119 Web Server : Apache System : Linux krdc-ubuntu-s-2vcpu-4gb-amd-blr1-01.localdomain 5.15.0-142-generic #152-Ubuntu SMP Mon May 19 10:54:31 UTC 2025 x86_64 User : www ( 1000) PHP Version : 7.4.33 Disable Function : passthru,exec,system,putenv,chroot,chgrp,chown,shell_exec,popen,proc_open,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /www/server/mysql/src/mysql-test/suite/ndb/r/ |
Upload File : |
CREATE TABLE parent (
id INT NOT NULL AUTO_INCREMENT,
bogus_column char(32),
PRIMARY KEY (id)
) ENGINE=ndb;
CREATE TABLE child (
id INT NOT NULL AUTO_INCREMENT,
parent_id INT NOT NULL,
bogus_column char(32),
PRIMARY KEY (id),
KEY (parent_id)
) ENGINE=ndb;
alter table child add constraint fkname foreign key (parent_id) references parent (id) on update restrict on delete restrict;
INSERT INTO parent (bogus_column)
VALUES ('aaa'), ('bbb'), ('ccc'), ('ddd'), ('eee');
INSERT INTO child (parent_id,bogus_column) VALUES
(1, 'aaa'), (2,'bbb'), (3, 'ccc'),
(4, 'ddd'), (5, 'eee');
START TRANSACTION;
START TRANSACTION;
UPDATE child SET parent_id = 5 WHERE parent_id = 4;
UPDATE parent SET bogus_column = 'new!' WHERE id = 4;
UPDATE parent SET bogus_column = 'new!' WHERE id = 5;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
rollback;
rollback;
alter table child drop foreign key fkname;
alter table child add constraint fkname foreign key (parent_id) references parent (id);
START TRANSACTION;
START TRANSACTION;
UPDATE child SET parent_id = 5 WHERE parent_id = 4;
UPDATE parent SET bogus_column = 'new!' WHERE id = 4;
UPDATE parent SET bogus_column = 'new!' WHERE id = 5;
commit;
commit;
drop table child, parent;
CREATE TABLE t1 (
id int(11) NOT NULL auto_increment,
ref_id int(11) default NULL,
PRIMARY KEY (id),
KEY ref_id (ref_id),
CONSTRAINT ref_id FOREIGN KEY (ref_id) REFERENCES t1 (id)
) ENGINE=ndb;
INSERT INTO t1 VALUES (1, 1);
DELETE FROM t1 WHERE id = 1;
drop table t1;