| Server IP : 104.21.38.3 / Your IP : 172.68.164.24 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/mysql-test/t/ |
Upload File : |
#
# Demonstrate how RESIGNAL can be used to print a stack trace
#
# Save defaults
SET @start_global_value = @@global.max_error_count;
SELECT @start_global_value;
SET @start_session_value = @@session.max_error_count;
SELECT @start_session_value;
--disable_warnings
drop database if exists demo;
--enable_warnings
create database demo;
use demo;
delimiter $$;
create procedure proc_1()
begin
declare exit handler for sqlexception
resignal sqlstate '45000' set message_text='Oops in proc_1';
call proc_2();
end
$$
create procedure proc_2()
begin
declare exit handler for sqlexception
resignal sqlstate '45000' set message_text='Oops in proc_2';
call proc_3();
end
$$
create procedure proc_3()
begin
declare exit handler for sqlexception
resignal sqlstate '45000' set message_text='Oops in proc_3';
call proc_4();
end
$$
create procedure proc_4()
begin
declare exit handler for sqlexception
resignal sqlstate '45000' set message_text='Oops in proc_4';
call proc_5();
end
$$
create procedure proc_5()
begin
declare exit handler for sqlexception
resignal sqlstate '45000' set message_text='Oops in proc_5';
call proc_6();
end
$$
create procedure proc_6()
begin
declare exit handler for sqlexception
resignal sqlstate '45000' set message_text='Oops in proc_6';
call proc_7();
end
$$
create procedure proc_7()
begin
declare exit handler for sqlexception
resignal sqlstate '45000' set message_text='Oops in proc_7';
call proc_8();
end
$$
create procedure proc_8()
begin
declare exit handler for sqlexception
resignal sqlstate '45000' set message_text='Oops in proc_8';
call proc_9();
end
$$
create procedure proc_9()
begin
declare exit handler for sqlexception
resignal sqlstate '45000' set message_text='Oops in proc_9';
## Do something that fails, to see how errors are reported
drop table oops_it_is_not_here;
end
$$
delimiter ;$$
-- error ER_SIGNAL_EXCEPTION
call proc_1();
# This is the interesting part:
# the complete call stack from the origin of failure (proc_9)
# to the top level caller (proc_1) is available ...
show warnings;
SET @@session.max_error_count = 5;
SELECT @@session.max_error_count;
-- error ER_SIGNAL_EXCEPTION
call proc_1();
show warnings;
SET @@session.max_error_count = 7;
SELECT @@session.max_error_count;
-- error ER_SIGNAL_EXCEPTION
call proc_1();
show warnings;
SET @@session.max_error_count = 9;
SELECT @@session.max_error_count;
-- error ER_SIGNAL_EXCEPTION
call proc_1();
show warnings;
drop database demo;
# Restore defaults
SET @@global.max_error_count = @start_global_value;
SELECT @@global.max_error_count;
SET @@session.max_error_count = @start_session_value;
SELECT @@session.max_error_count;