Server IP : 104.21.38.3 / Your IP : 172.68.164.13 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/sys_vars/r/ |
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DROP TABLE IF EXISTS t1; ## Creating new table ## CREATE TABLE t1 ( name VARCHAR(30) ); '#--------------------FN_DYNVARS_018_01-------------------------#' SET @start_value= @@global.concurrent_insert; ## Setting initial value of variable to 1 ## SET @@global.concurrent_insert = 1; INSERT INTO t1(name) VALUES('Record_1'); INSERT INTO t1(name) VALUES('Record_2'); INSERT INTO t1(name) VALUES('Record_3'); ## locking table ## LOCK TABLE t1 READ LOCAL; ## Creating new connection to insert some rows in table ## connection test_con1; ## New records should come at the end of all rows ## INSERT INTO t1(name) VALUES('Record_4'); SELECT * FROM t1; name Record_1 Record_2 Record_3 Record_4 ## unlocking tables ## connection default; UNLOCK TABLES; ## deleting record to create hole in table ## DELETE FROM t1 WHERE name ='Record_2'; '#--------------------FN_DYNVARS_018_02-------------------------#' LOCK TABLE t1 READ LOCAL; connection test_con1; SET @@global.concurrent_insert=1; ## send INSERT which should be blocked until unlock of the table ## INSERT INTO t1(name) VALUES('Record_7'); connection default; ## show processlist info and state ## SELECT state,info FROM INFORMATION_SCHEMA.PROCESSLIST WHERE state= "Waiting for table level lock" AND info LIKE "INSERT INTO t1%"; state info Waiting for table level lock INSERT INTO t1(name) VALUES('Record_7') ## table contents befor UNLOCK ## SELECT * FROM t1; name Record_1 Record_3 Record_4 UNLOCK TABLES; ## table contens after UNLOCK ## SELECT * FROM t1; name Record_1 Record_7 Record_3 Record_4 INSERT INTO t1(name) VALUES('Record_6'); connection test_con1; SELECT * FROM t1; name Record_1 Record_7 Record_3 Record_4 Record_6 connection default; '#--------------------FN_DYNVARS_018_03-------------------------#' ## lock table and connect with connection1 ## LOCK TABLE t1 READ LOCAL; connection test_con1; ## setting value of concurrent_insert to 2 ## SET @@global.concurrent_insert=2; ## Inserting record in table, record should go at the end of the table ## INSERT INTO t1(name) VALUES('Record_5'); SELECT * FROM t1; name Record_1 Record_7 Record_3 Record_4 Record_6 Record_5 SELECT @@concurrent_insert; @@concurrent_insert ALWAYS connection default; ## Unlocking table ## UNLOCK TABLES; SELECT * FROM t1; name Record_1 Record_7 Record_3 Record_4 Record_6 Record_5 ## Inserting new row, this should go in the hole ## INSERT INTO t1(name) VALUES('Record_6'); SELECT * FROM t1; name Record_1 Record_7 Record_3 Record_4 Record_6 Record_5 Record_6 ## connection test_con1 ## DELETE FROM t1 WHERE name ='Record_3'; SELECT * FROM t1; name Record_1 Record_7 Record_4 Record_6 Record_5 Record_6 ## Dropping table ## DROP TABLE t1; ## Disconnecting connection ## SET @@global.concurrent_insert= @start_value;