| Server IP : 104.21.38.3 / Your IP : 172.70.189.70 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;