| Server IP : 104.21.38.3 / Your IP : 162.158.106.190 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/innodb/r/ |
Upload File : |
# #Bug#11759688 52020: InnoDB can still deadlock #on just INSERT...ON DUPLICATE KEY #a.k.a. Bug#7975 deadlock without any locking, simple select and update # CREATE TABLE t1 (a INT PRIMARY KEY, b INT NOT NULL) ENGINE=InnoDB; INSERT INTO t1 VALUES(3,1); BEGIN; SET DEBUG_SYNC='write_row_noreplace SIGNAL insert1 WAIT_FOR select1'; INSERT INTO t1 VALUES(3,2); SET DEBUG_SYNC='now WAIT_FOR insert1'; SELECT * FROM t1 LOCK IN SHARE MODE; a b 3 1 SELECT * FROM t1 FOR UPDATE; SET DEBUG_SYNC='now SIGNAL select1'; ERROR 23000: Duplicate entry '3' for key 'PRIMARY' INSERT INTO t1 VALUES(3,3) ON DUPLICATE KEY UPDATE b=b+10; ERROR 40001: Deadlock found when trying to get lock; try restarting transaction COMMIT; SET DEBUG_SYNC='write_row_replace SIGNAL insert2 WAIT_FOR select2'; REPLACE INTO t1 VALUES(3,4); SET DEBUG_SYNC='now WAIT_FOR insert2'; SELECT * FROM t1; a b 3 11 SELECT * FROM t1 LOCK IN SHARE MODE; SET DEBUG_SYNC='now SIGNAL select2'; SET DEBUG_SYNC='write_row_replace SIGNAL insert3 WAIT_FOR select3'; INSERT INTO t1 VALUES(3,5) ON DUPLICATE KEY UPDATE b=b+20; a b 3 4 SET DEBUG_SYNC='now WAIT_FOR insert3'; SELECT b FROM t1 LOCK IN SHARE MODE; SET DEBUG_SYNC='now SIGNAL select3'; b 24 SET DEBUG_SYNC='write_row_noreplace SIGNAL insert4 WAIT_FOR select4'; LOAD DATA INFILE '../../std_data/loaddata5.dat' INTO TABLE t1 FIELDS TERMINATED BY '' ENCLOSED BY '' (a, b); SET DEBUG_SYNC='now WAIT_FOR insert4'; SELECT b FROM t1 WHERE a=3 LOCK IN SHARE MODE; b 24 SELECT b FROM t1 WHERE a=3 FOR UPDATE; SET DEBUG_SYNC='now SIGNAL select4'; b 24 ERROR 23000: Duplicate entry '3' for key 'PRIMARY' SET DEBUG_SYNC='write_row_noreplace SIGNAL insert5 WAIT_FOR select5'; LOAD DATA INFILE '../../std_data/loaddata5.dat' IGNORE INTO TABLE t1 FIELDS TERMINATED BY '' ENCLOSED BY '' (a, b); SET DEBUG_SYNC='now WAIT_FOR insert5'; SELECT * FROM t1; a b 3 24 SELECT * FROM t1 WHERE a=3 LOCK IN SHARE MODE; a b 3 24 SELECT * FROM t1 WHERE a=3 FOR UPDATE; SET DEBUG_SYNC='now SIGNAL select5'; Warnings: Warning 1062 Duplicate entry '3' for key 'PRIMARY' a b 3 24 SET DEBUG_SYNC='write_row_replace SIGNAL insert6 WAIT_FOR select6'; LOAD DATA INFILE '../../std_data/loaddata5.dat' REPLACE INTO TABLE t1 FIELDS TERMINATED BY '' ENCLOSED BY '' (a, b); SET DEBUG_SYNC='now WAIT_FOR insert6'; SELECT * FROM t1; a b 1 2 3 24 5 6 SELECT a,b FROM t1 LOCK IN SHARE MODE; SET DEBUG_SYNC='now SIGNAL select6'; a b 1 2 3 4 5 6 SET DEBUG_SYNC='RESET'; DROP TABLE t1; START TRANSACTION; CREATE TEMPORARY TABLE t1 (a INT, b CHAR(10), d VARCHAR(100), c INT, UNIQUE INDEX(a), UNIQUE INDEX(b), UNIQUE INDEX(d)) ENGINE = InnoDB; INSERT INTO t1 VALUES(2, 'abcde', 'qwerty', 200); REPLACE INTO t1 VALUES(2, 'QWERTY', 'ZXCVBB', 300); SELECT * FROM t1; a b d c 2 QWERTY ZXCVBB 300 COMMIT; DROP TABLE t1;