| Server IP : 104.21.38.3 / Your IP : 172.70.189.142 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/ |
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CREATE TABLE t (a INT PRIMARY KEY, c TEXT) ENGINE=InnoDB; CREATE TABLE u (a INT PRIMARY KEY, b INT, c INT NOT NULL) ENGINE=InnoDB; INSERT INTO t VALUES (1,'aa'); BEGIN; INSERT INTO u SET a=1, c=1; INSERT INTO u SELECT a+1,NULL,a+1 FROM u; INSERT INTO u SELECT a+2,NULL,a+2 FROM u; INSERT INTO u SELECT a+4,NULL,a+4 FROM u; INSERT INTO u SELECT a+8,NULL,a+8 FROM u; INSERT INTO u SELECT a+16,NULL,a+16 FROM u; INSERT INTO u SELECT a+32,NULL,a+32 FROM u; INSERT INTO u SELECT a+64,NULL,a+64 FROM u; INSERT INTO u SELECT a+128,NULL,a+64 FROM u; INSERT INTO u SELECT a+256,NULL,a+64 FROM u; COMMIT; BEGIN; DELETE FROM u; SET DEBUG_SYNC='row_log_apply_before SIGNAL created_u WAIT_FOR dml_done_u'; ALTER TABLE u ADD INDEX (c); COMMIT; SET DEBUG_SYNC='now WAIT_FOR created_u'; SELECT state FROM information_schema.processlist WHERE info='ALTER TABLE u ADD INDEX (c)'; state debug sync point: row_log_apply_before SET DEBUG_SYNC='row_log_apply_before SIGNAL created_t WAIT_FOR dml_done_t'; CREATE INDEX c1 ON t (c(1)); SET DEBUG_SYNC='now WAIT_FOR created_t'; UPDATE t SET c='ab'; SELECT SLEEP(10); SLEEP(10) 0 SET DEBUG_SYNC='now SIGNAL dml_done_u'; SET DEBUG_SYNC='now SIGNAL dml_done_t'; SET DEBUG_SYNC='RESET'; DROP TABLE t,u;