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144 lines
2.7 KiB
Text
144 lines
2.7 KiB
Text
#
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# Demonstrate how RESIGNAL can be used to print a stack trace
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#
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# Save defaults
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SET @start_global_value = @@global.max_error_count;
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SELECT @start_global_value;
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SET @start_session_value = @@session.max_error_count;
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SELECT @start_session_value;
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--disable_warnings
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drop database if exists demo;
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--enable_warnings
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create database demo;
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use demo;
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delimiter $$;
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create procedure proc_1()
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begin
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declare exit handler for sqlexception
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resignal sqlstate '45000' set message_text='Oops in proc_1';
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call proc_2();
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end
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$$
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create procedure proc_2()
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begin
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declare exit handler for sqlexception
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resignal sqlstate '45000' set message_text='Oops in proc_2';
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call proc_3();
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end
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$$
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create procedure proc_3()
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begin
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declare exit handler for sqlexception
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resignal sqlstate '45000' set message_text='Oops in proc_3';
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call proc_4();
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end
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$$
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create procedure proc_4()
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begin
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declare exit handler for sqlexception
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resignal sqlstate '45000' set message_text='Oops in proc_4';
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call proc_5();
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end
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$$
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create procedure proc_5()
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begin
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declare exit handler for sqlexception
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resignal sqlstate '45000' set message_text='Oops in proc_5';
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call proc_6();
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end
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$$
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create procedure proc_6()
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begin
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declare exit handler for sqlexception
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resignal sqlstate '45000' set message_text='Oops in proc_6';
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call proc_7();
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end
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$$
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create procedure proc_7()
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begin
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declare exit handler for sqlexception
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resignal sqlstate '45000' set message_text='Oops in proc_7';
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call proc_8();
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end
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$$
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create procedure proc_8()
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begin
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declare exit handler for sqlexception
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resignal sqlstate '45000' set message_text='Oops in proc_8';
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call proc_9();
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end
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$$
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create procedure proc_9()
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begin
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declare exit handler for sqlexception
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resignal sqlstate '45000' set message_text='Oops in proc_9';
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## Do something that fails, to see how errors are reported
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drop table oops_it_is_not_here;
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end
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$$
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delimiter ;$$
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-- error ER_SIGNAL_EXCEPTION
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call proc_1();
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# This is the interesting part:
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# the complete call stack from the origin of failure (proc_9)
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# to the top level caller (proc_1) is available ...
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show warnings;
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SET @@session.max_error_count = 5;
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SELECT @@session.max_error_count;
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-- error ER_SIGNAL_EXCEPTION
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call proc_1();
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show warnings;
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SET @@session.max_error_count = 7;
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SELECT @@session.max_error_count;
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-- error ER_SIGNAL_EXCEPTION
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call proc_1();
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show warnings;
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SET @@session.max_error_count = 9;
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SELECT @@session.max_error_count;
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-- error ER_SIGNAL_EXCEPTION
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call proc_1();
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show warnings;
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drop database demo;
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# Restore defaults
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SET @@global.max_error_count = @start_global_value;
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SELECT @@global.max_error_count;
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SET @@session.max_error_count = @start_session_value;
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SELECT @@session.max_error_count;
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