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|
================================================================================
SETUP
================================================================================
# Save the initial number of concurrent sessions
# Save current SHOW_COMPATIBILITY_56 setting
SELECT @@global.show_compatibility_56 INTO @show_compatibility_56_save;
#
# SET COMPATIBILITY MODE = ON
#
SET @@global.show_compatibility_56 = ON;
# Verify EXAMPLE plugin is not loaded
SELECT COUNT(*) = 0 AS "Expect 1" FROM information_schema.plugins WHERE plugin_name = "EXAMPLE";
Expect 1
1
# Create one session to force local and global system variables;
connect con0, localhost, root,,;
connection default;
================================================================================
TEST 1- NO PLUGIN VARS
================================================================================
SHOW GLOBAL STATUS LIKE "example_%";
Variable_name Value
SHOW SESSION STATUS LIKE "example_%";
Variable_name Value
SHOW GLOBAL VARIABLES LIKE "example_%";
Variable_name Value
SHOW SESSION VARIABLES LIKE "example_%";
Variable_name Value
SELECT variable_name, variable_value FROM information_schema.global_status WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.session_status WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.global_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.session_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
================================================================================
TEST 2 - PLUGIN LOAD, UNLOAD, RELOAD
================================================================================
================================================================================
2.1 - INSTALL PLUGIN
================================================================================
INSTALL PLUGIN example SONAME 'ha_example.so';
================================================================================
2.1a - FORCE SYNC OF LOCAL AND GLOBAL SYSTEM VARS
================================================================================
SHOW GLOBAL STATUS LIKE "example_%";
Variable_name Value
example_func_example enum_var is 0, ulong_var is 8, double_var is 8.500000, really
example_status_array_var1 100
example_status_array_var2 20.010000
example_status_var3 three hundred
example_status_var4 ON
example_status_var5 OFF
example_status_var6 8250
SHOW SESSION STATUS LIKE "example_%";
Variable_name Value
example_func_example enum_var is 0, ulong_var is 8, double_var is 8.500000, really
example_status_array_var1 100
example_status_array_var2 20.010000
example_status_var3 three hundred
example_status_var4 ON
example_status_var5 OFF
example_status_var6 8250
SHOW GLOBAL VARIABLES LIKE "example_%";
Variable_name Value
example_double_thdvar 8.500000
example_double_var 8.500000
example_enum_var e1
example_ulong_var 8
SHOW SESSION VARIABLES LIKE "example_%";
Variable_name Value
example_double_thdvar 8.500000
example_double_var 8.500000
example_enum_var e1
example_ulong_var 8
SELECT variable_name, variable_value FROM information_schema.global_status WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_FUNC_EXAMPLE enum_var is 0, ulong_var is 8, double_var is 8.500000, really
EXAMPLE_STATUS_ARRAY_VAR1 100
EXAMPLE_STATUS_ARRAY_VAR2 20.010000
EXAMPLE_STATUS_VAR3 three hundred
EXAMPLE_STATUS_VAR4 ON
EXAMPLE_STATUS_VAR5 OFF
EXAMPLE_STATUS_VAR6 8250
SELECT variable_name, variable_value FROM information_schema.session_status WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_FUNC_EXAMPLE enum_var is 0, ulong_var is 8, double_var is 8.500000, really
EXAMPLE_STATUS_ARRAY_VAR1 100
EXAMPLE_STATUS_ARRAY_VAR2 20.010000
EXAMPLE_STATUS_VAR3 three hundred
EXAMPLE_STATUS_VAR4 ON
EXAMPLE_STATUS_VAR5 OFF
EXAMPLE_STATUS_VAR6 8250
SELECT variable_name, variable_value FROM information_schema.global_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_ENUM_VAR e1
EXAMPLE_DOUBLE_THDVAR 8.500000
EXAMPLE_ULONG_VAR 8
EXAMPLE_DOUBLE_VAR 8.500000
SELECT variable_name, variable_value FROM information_schema.session_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_ENUM_VAR e1
EXAMPLE_DOUBLE_THDVAR 8.500000
EXAMPLE_ULONG_VAR 8
EXAMPLE_DOUBLE_VAR 8.500000
disconnect con0;
================================================================================
2.2 - SET PLUGIN VARS
================================================================================
# GLOBAL
SET GLOBAL example_ulong_var = 100;
SET GLOBAL example_enum_var = e1;
SET GLOBAL example_double_var = 100.9990;
SET GLOBAL example_double_thdvar = 101.9991;
# SESSION
SET SESSION example_double_thdvar = 102.9992;
================================================================================
2.3 - VERIFY UPDATED PLUGIN VARS
================================================================================
SHOW GLOBAL STATUS LIKE "example_%";
Variable_name Value
example_func_example enum_var is 0, ulong_var is 100, double_var is 100.999000, really
example_status_array_var1 100
example_status_array_var2 20.010000
example_status_var3 three hundred
example_status_var4 ON
example_status_var5 OFF
example_status_var6 8250
SHOW SESSION STATUS LIKE "example_%";
Variable_name Value
example_func_example enum_var is 0, ulong_var is 100, double_var is 100.999000, really
example_status_array_var1 100
example_status_array_var2 20.010000
example_status_var3 three hundred
example_status_var4 ON
example_status_var5 OFF
example_status_var6 8250
SHOW GLOBAL VARIABLES LIKE "example_%";
Variable_name Value
example_double_thdvar 101.999100
example_double_var 100.999000
example_enum_var e1
example_ulong_var 100
SHOW SESSION VARIABLES LIKE "example_%";
Variable_name Value
example_double_thdvar 102.999200
example_double_var 100.999000
example_enum_var e1
example_ulong_var 100
SELECT variable_name, variable_value FROM information_schema.global_status WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_FUNC_EXAMPLE enum_var is 0, ulong_var is 100, double_var is 100.999000, really
EXAMPLE_STATUS_ARRAY_VAR1 100
EXAMPLE_STATUS_ARRAY_VAR2 20.010000
EXAMPLE_STATUS_VAR3 three hundred
EXAMPLE_STATUS_VAR4 ON
EXAMPLE_STATUS_VAR5 OFF
EXAMPLE_STATUS_VAR6 8250
SELECT variable_name, variable_value FROM information_schema.session_status WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_FUNC_EXAMPLE enum_var is 0, ulong_var is 100, double_var is 100.999000, really
EXAMPLE_STATUS_ARRAY_VAR1 100
EXAMPLE_STATUS_ARRAY_VAR2 20.010000
EXAMPLE_STATUS_VAR3 three hundred
EXAMPLE_STATUS_VAR4 ON
EXAMPLE_STATUS_VAR5 OFF
EXAMPLE_STATUS_VAR6 8250
SELECT variable_name, variable_value FROM information_schema.global_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_ENUM_VAR e1
EXAMPLE_DOUBLE_THDVAR 101.999100
EXAMPLE_ULONG_VAR 100
EXAMPLE_DOUBLE_VAR 100.999000
SELECT variable_name, variable_value FROM information_schema.session_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_ENUM_VAR e1
EXAMPLE_DOUBLE_THDVAR 102.999200
EXAMPLE_ULONG_VAR 100
EXAMPLE_DOUBLE_VAR 100.999000
================================================================================
2.4 - UNINSTALL PLUGIN
================================================================================
UNINSTALL PLUGIN example;
================================================================================
2.5 - VERIFY NO PLUGIN VARS
================================================================================
SHOW GLOBAL STATUS LIKE "example_%";
Variable_name Value
SHOW SESSION STATUS LIKE "example_%";
Variable_name Value
SHOW GLOBAL VARIABLES LIKE "example_%";
Variable_name Value
SHOW SESSION VARIABLES LIKE "example_%";
Variable_name Value
SELECT variable_name, variable_value FROM information_schema.global_status WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.session_status WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.global_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.session_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
================================================================================
2.6 - REINSTALL PLUGIN
================================================================================
# Reinstall EXAMPLE plugin
INSTALL PLUGIN example SONAME 'ha_example.so';
================================================================================
2.7 - SET PLUGIN VARS AGAIN
================================================================================
# GLOBAL
SET GLOBAL example_ulong_var = 200;
SET GLOBAL example_enum_var = e2;
SET GLOBAL example_double_var = 200.8880;
SET GLOBAL example_double_thdvar = 201.8881;
# SESSION
SET SESSION example_double_thdvar = 202.8882;
================================================================================
2.8 - VERIFY PLUGIN VARS
================================================================================
SHOW GLOBAL STATUS LIKE "example_%";
Variable_name Value
example_func_example enum_var is 1, ulong_var is 200, double_var is 200.888000, really
example_status_array_var1 100
example_status_array_var2 20.010000
example_status_var3 three hundred
example_status_var4 ON
example_status_var5 OFF
example_status_var6 8250
SHOW SESSION STATUS LIKE "example_%";
Variable_name Value
example_func_example enum_var is 1, ulong_var is 200, double_var is 200.888000, really
example_status_array_var1 100
example_status_array_var2 20.010000
example_status_var3 three hundred
example_status_var4 ON
example_status_var5 OFF
example_status_var6 8250
SHOW GLOBAL VARIABLES LIKE "example_%";
Variable_name Value
example_double_thdvar 201.888100
example_double_var 200.888000
example_enum_var e2
example_ulong_var 200
SHOW SESSION VARIABLES LIKE "example_%";
Variable_name Value
example_double_thdvar 202.888200
example_double_var 200.888000
example_enum_var e2
example_ulong_var 200
SELECT variable_name, variable_value FROM information_schema.global_status WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_FUNC_EXAMPLE enum_var is 1, ulong_var is 200, double_var is 200.888000, really
EXAMPLE_STATUS_ARRAY_VAR1 100
EXAMPLE_STATUS_ARRAY_VAR2 20.010000
EXAMPLE_STATUS_VAR3 three hundred
EXAMPLE_STATUS_VAR4 ON
EXAMPLE_STATUS_VAR5 OFF
EXAMPLE_STATUS_VAR6 8250
SELECT variable_name, variable_value FROM information_schema.session_status WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_FUNC_EXAMPLE enum_var is 1, ulong_var is 200, double_var is 200.888000, really
EXAMPLE_STATUS_ARRAY_VAR1 100
EXAMPLE_STATUS_ARRAY_VAR2 20.010000
EXAMPLE_STATUS_VAR3 three hundred
EXAMPLE_STATUS_VAR4 ON
EXAMPLE_STATUS_VAR5 OFF
EXAMPLE_STATUS_VAR6 8250
SELECT variable_name, variable_value FROM information_schema.global_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_ENUM_VAR e2
EXAMPLE_DOUBLE_THDVAR 201.888100
EXAMPLE_ULONG_VAR 200
EXAMPLE_DOUBLE_VAR 200.888000
SELECT variable_name, variable_value FROM information_schema.session_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_ENUM_VAR e2
EXAMPLE_DOUBLE_THDVAR 202.888200
EXAMPLE_ULONG_VAR 200
EXAMPLE_DOUBLE_VAR 200.888000
================================================================================
2.9 - UNINSTALL PLUGIN
================================================================================
UNINSTALL PLUGIN example;
================================================================================
2.10 - VERIFY NO PLUGIN VARS
================================================================================
SHOW GLOBAL STATUS LIKE "example_%";
Variable_name Value
SHOW SESSION STATUS LIKE "example_%";
Variable_name Value
SHOW GLOBAL VARIABLES LIKE "example_%";
Variable_name Value
SHOW SESSION VARIABLES LIKE "example_%";
Variable_name Value
SELECT variable_name, variable_value FROM information_schema.global_status WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.session_status WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.global_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.session_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
================================================================================
TEST 3 - SESSION PLUGIN VARS ON MULTIPLE CONNECTIONS
================================================================================
================================================================================
3.1 - INSTALL PLUGIN
================================================================================
INSTALL PLUGIN example SONAME 'ha_example.so';
================================================================================
3.2 - SET GLOBAL AND DEFAULT CONNECTION VARS
================================================================================
connection default;
SET GLOBAL example_ulong_var = 300;
SET GLOBAL example_enum_var = e1;
SET GLOBAL example_double_var = 301.0000;
SET GLOBAL example_double_thdvar = 302.0000;
SET SESSION example_double_thdvar = 300.0000;
================================================================================
3.3 - CONNECT 3 CLIENTS, SET LOCAL PLUGIN VARS
================================================================================
connect con1, localhost, root,,;
SET SESSION example_double_thdvar = 300.1111;
connect con2, localhost, root,,;
SET SESSION example_double_thdvar = 300.2222;
connect con3, localhost, root,,;
SET SESSION example_double_thdvar = 300.3333;
connection default;
================================================================================
3.4 - VERIFY GLOBAL AND SESSION PLUGIN VARS
================================================================================
SHOW GLOBAL STATUS LIKE "example_%";
Variable_name Value
example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really
example_status_array_var1 100
example_status_array_var2 20.010000
example_status_var3 three hundred
example_status_var4 ON
example_status_var5 OFF
example_status_var6 8250
SHOW SESSION STATUS LIKE "example_%";
Variable_name Value
example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really
example_status_array_var1 100
example_status_array_var2 20.010000
example_status_var3 three hundred
example_status_var4 ON
example_status_var5 OFF
example_status_var6 8250
SHOW GLOBAL VARIABLES LIKE "example_%";
Variable_name Value
example_double_thdvar 302.000000
example_double_var 301.000000
example_enum_var e1
example_ulong_var 300
SHOW SESSION VARIABLES LIKE "example_%";
Variable_name Value
example_double_thdvar 300.000000
example_double_var 301.000000
example_enum_var e1
example_ulong_var 300
SELECT variable_name, variable_value FROM information_schema.global_status WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_FUNC_EXAMPLE enum_var is 0, ulong_var is 300, double_var is 301.000000, really
EXAMPLE_STATUS_ARRAY_VAR1 100
EXAMPLE_STATUS_ARRAY_VAR2 20.010000
EXAMPLE_STATUS_VAR3 three hundred
EXAMPLE_STATUS_VAR4 ON
EXAMPLE_STATUS_VAR5 OFF
EXAMPLE_STATUS_VAR6 8250
SELECT variable_name, variable_value FROM information_schema.session_status WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_FUNC_EXAMPLE enum_var is 0, ulong_var is 300, double_var is 301.000000, really
EXAMPLE_STATUS_ARRAY_VAR1 100
EXAMPLE_STATUS_ARRAY_VAR2 20.010000
EXAMPLE_STATUS_VAR3 three hundred
EXAMPLE_STATUS_VAR4 ON
EXAMPLE_STATUS_VAR5 OFF
EXAMPLE_STATUS_VAR6 8250
SELECT variable_name, variable_value FROM information_schema.global_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_ENUM_VAR e1
EXAMPLE_DOUBLE_THDVAR 302.000000
EXAMPLE_ULONG_VAR 300
EXAMPLE_DOUBLE_VAR 301.000000
SELECT variable_name, variable_value FROM information_schema.session_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_ENUM_VAR e1
EXAMPLE_DOUBLE_THDVAR 300.000000
EXAMPLE_ULONG_VAR 300
EXAMPLE_DOUBLE_VAR 301.000000
# Variables by thread
SELECT variable_name, variable_value FROM performance_schema.variables_by_thread
WHERE variable_name LIKE "example_%" ORDER BY variable_value;
variable_name variable_value
example_double_thdvar 300.000000
example_double_thdvar 300.111100
example_double_thdvar 300.222200
example_double_thdvar 300.333300
================================================================================
3.5 - DISCONNECT CLIENTS
================================================================================
connection con1;
disconnect con1;
connection con2;
disconnect con2;
connection con3;
disconnect con3;
connection default;
================================================================================
3.6 - VERIFY SESSION VARS ARE REMOVED
================================================================================
SHOW GLOBAL STATUS LIKE "example_%";
Variable_name Value
example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really
example_status_array_var1 100
example_status_array_var2 20.010000
example_status_var3 three hundred
example_status_var4 ON
example_status_var5 OFF
example_status_var6 8250
SHOW SESSION STATUS LIKE "example_%";
Variable_name Value
example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really
example_status_array_var1 100
example_status_array_var2 20.010000
example_status_var3 three hundred
example_status_var4 ON
example_status_var5 OFF
example_status_var6 8250
SHOW GLOBAL VARIABLES LIKE "example_%";
Variable_name Value
example_double_thdvar 302.000000
example_double_var 301.000000
example_enum_var e1
example_ulong_var 300
SHOW SESSION VARIABLES LIKE "example_%";
Variable_name Value
example_double_thdvar 300.000000
example_double_var 301.000000
example_enum_var e1
example_ulong_var 300
SELECT variable_name, variable_value FROM information_schema.global_status WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_FUNC_EXAMPLE enum_var is 0, ulong_var is 300, double_var is 301.000000, really
EXAMPLE_STATUS_ARRAY_VAR1 100
EXAMPLE_STATUS_ARRAY_VAR2 20.010000
EXAMPLE_STATUS_VAR3 three hundred
EXAMPLE_STATUS_VAR4 ON
EXAMPLE_STATUS_VAR5 OFF
EXAMPLE_STATUS_VAR6 8250
SELECT variable_name, variable_value FROM information_schema.session_status WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_FUNC_EXAMPLE enum_var is 0, ulong_var is 300, double_var is 301.000000, really
EXAMPLE_STATUS_ARRAY_VAR1 100
EXAMPLE_STATUS_ARRAY_VAR2 20.010000
EXAMPLE_STATUS_VAR3 three hundred
EXAMPLE_STATUS_VAR4 ON
EXAMPLE_STATUS_VAR5 OFF
EXAMPLE_STATUS_VAR6 8250
SELECT variable_name, variable_value FROM information_schema.global_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_ENUM_VAR e1
EXAMPLE_DOUBLE_THDVAR 302.000000
EXAMPLE_ULONG_VAR 300
EXAMPLE_DOUBLE_VAR 301.000000
SELECT variable_name, variable_value FROM information_schema.session_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_ENUM_VAR e1
EXAMPLE_DOUBLE_THDVAR 300.000000
EXAMPLE_ULONG_VAR 300
EXAMPLE_DOUBLE_VAR 301.000000
# Variables by thread
SELECT variable_name, variable_value FROM performance_schema.variables_by_thread
WHERE variable_name LIKE "example_%" ORDER BY variable_value;
variable_name variable_value
example_double_thdvar 300.000000
================================================================================
3.7 - RECONNECT 3 CLIENTS, SET SESSION VARS FOR EACH
================================================================================
connect con1, localhost, root,,;
SET SESSION example_double_thdvar = 311.1111;
connect con2, localhost, root,,;
SET SESSION example_double_thdvar = 322.2222;
connect con3, localhost, root,,;
SET SESSION example_double_thdvar = 333.3333;
connection default;
================================================================================
3.8 - VERIFY GLOBAL AND SESSION VARS
================================================================================
SHOW GLOBAL STATUS LIKE "example_%";
Variable_name Value
example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really
example_status_array_var1 100
example_status_array_var2 20.010000
example_status_var3 three hundred
example_status_var4 ON
example_status_var5 OFF
example_status_var6 8250
SHOW SESSION STATUS LIKE "example_%";
Variable_name Value
example_func_example enum_var is 0, ulong_var is 300, double_var is 301.000000, really
example_status_array_var1 100
example_status_array_var2 20.010000
example_status_var3 three hundred
example_status_var4 ON
example_status_var5 OFF
example_status_var6 8250
SHOW GLOBAL VARIABLES LIKE "example_%";
Variable_name Value
example_double_thdvar 302.000000
example_double_var 301.000000
example_enum_var e1
example_ulong_var 300
SHOW SESSION VARIABLES LIKE "example_%";
Variable_name Value
example_double_thdvar 300.000000
example_double_var 301.000000
example_enum_var e1
example_ulong_var 300
SELECT variable_name, variable_value FROM information_schema.global_status WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_FUNC_EXAMPLE enum_var is 0, ulong_var is 300, double_var is 301.000000, really
EXAMPLE_STATUS_ARRAY_VAR1 100
EXAMPLE_STATUS_ARRAY_VAR2 20.010000
EXAMPLE_STATUS_VAR3 three hundred
EXAMPLE_STATUS_VAR4 ON
EXAMPLE_STATUS_VAR5 OFF
EXAMPLE_STATUS_VAR6 8250
SELECT variable_name, variable_value FROM information_schema.session_status WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_FUNC_EXAMPLE enum_var is 0, ulong_var is 300, double_var is 301.000000, really
EXAMPLE_STATUS_ARRAY_VAR1 100
EXAMPLE_STATUS_ARRAY_VAR2 20.010000
EXAMPLE_STATUS_VAR3 three hundred
EXAMPLE_STATUS_VAR4 ON
EXAMPLE_STATUS_VAR5 OFF
EXAMPLE_STATUS_VAR6 8250
SELECT variable_name, variable_value FROM information_schema.global_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_ENUM_VAR e1
EXAMPLE_DOUBLE_THDVAR 302.000000
EXAMPLE_ULONG_VAR 300
EXAMPLE_DOUBLE_VAR 301.000000
SELECT variable_name, variable_value FROM information_schema.session_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
EXAMPLE_ENUM_VAR e1
EXAMPLE_DOUBLE_THDVAR 300.000000
EXAMPLE_ULONG_VAR 300
EXAMPLE_DOUBLE_VAR 301.000000
# Variables by thread
SELECT variable_name, variable_value FROM performance_schema.variables_by_thread
WHERE variable_name LIKE "example_%" ORDER BY variable_value;
variable_name variable_value
example_double_thdvar 300.000000
example_double_thdvar 311.111100
example_double_thdvar 322.222200
example_double_thdvar 333.333300
================================================================================
3.9 - UNINSTALL PLUGIN, LEAVE CLIENTS CONNECTED
================================================================================
UNINSTALL PLUGIN example;
================================================================================
3.10 - VERIFY SESSION VARS ARE REMOVED
================================================================================
SHOW GLOBAL STATUS LIKE "example_%";
Variable_name Value
SHOW SESSION STATUS LIKE "example_%";
Variable_name Value
SHOW GLOBAL VARIABLES LIKE "example_%";
Variable_name Value
SHOW SESSION VARIABLES LIKE "example_%";
Variable_name Value
SELECT variable_name, variable_value FROM information_schema.global_status WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.session_status WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.global_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.session_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
# VARIABLES BY THREAD
SELECT variable_name, variable_value FROM performance_schema.variables_by_thread
WHERE variable_name LIKE "example_%" ORDER BY variable_value;
variable_name variable_value
================================================================================
3.11 - DISCONNECT CLIENTS
================================================================================
connection con1;
disconnect con1;
connection con2;
disconnect con2;
connection con3;
disconnect con3;
connection default;
================================================================================
3.12 - VERIFY CLIENTS ARE REMOVED
================================================================================
SHOW GLOBAL STATUS LIKE "example_%";
Variable_name Value
SHOW SESSION STATUS LIKE "example_%";
Variable_name Value
SHOW GLOBAL VARIABLES LIKE "example_%";
Variable_name Value
SHOW SESSION VARIABLES LIKE "example_%";
Variable_name Value
SELECT variable_name, variable_value FROM information_schema.global_status WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.session_status WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.global_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
SELECT variable_name, variable_value FROM information_schema.session_variables WHERE variable_name LIKE "example_%";
variable_name variable_value
# VARIABLES BY THREAD
SELECT variable_name, variable_value FROM performance_schema.variables_by_thread
WHERE variable_name LIKE "example_%" ORDER BY variable_value;
variable_name variable_value
================================================================================
TEST 4 - BUG#18008907: DEADLOCK WITH CHANGE_USER, SHOW VARIABLES, INSTALL PLUGIN
================================================================================
CREATE PROCEDURE install_no_such_plugin()
BEGIN
INSTALL PLUGIN no_such_plugin SONAME 'no_such_object';
END|
CREATE PROCEDURE show_vars()
BEGIN
-- select on information_schema.global_variables
-- will fail, still need to cover execution of the code
-- to verify potential dead locks.
declare continue handler for sqlexception
begin
end;
SELECT COUNT(*) FROM information_schema.global_variables;
SELECT COUNT(*) FROM performance_schema.global_variables;
END|
================================================================================
4.1 - DEADLOCK SCENARIO 1:
con1 - has LOCK_system_variables_hash and waits on LOCK_plugin AND
default - has LOCK_plugin and waits on LOCK_system_variables_hash
================================================================================
connect con1, localhost, root,,;
SET DEBUG_SYNC='acquired_LOCK_system_variables_hash SIGNAL install_plugin WAIT_FOR cont_show_vars';
call show_vars();;
connection default;
SET DEBUG_SYNC='now WAIT_FOR install_plugin';
SET DEBUG_SYNC='acquired_LOCK_plugin SIGNAL cont_show_vars';
call install_no_such_plugin();;
connection con1;
# Without fix, reap will hang.
COUNT(*)
#
COUNT(*)
#
SET DEBUG_SYNC='RESET';
connection default;
ERROR HY000: Can't open shared library
SET DEBUG_SYNC='RESET';
================================================================================
4.2 - DEADLOCK SCENARIO 2:
default - has LOCK_system_variables_hash, waits on LOCK_global_system_variables
con1 - has LOCK_plugin, waits on LOCK_system_variables_hash AND
con2 - has LOCK_global_system_variables, waits on LOCK_plugin
================================================================================
SET DEBUG_SYNC='acquired_LOCK_system_variables_hash SIGNAL install_plugin WAIT_FOR nothing TIMEOUT 10';
call show_vars();;
connection con1;
SET DEBUG_SYNC='now WAIT_FOR install_plugin';
SET DEBUG_SYNC='acquired_LOCK_plugin SIGNAL create_connection WAIT_FOR nothing TIMEOUT 10';
call install_no_such_plugin();;
connect con2, localhost, root,,;
SET DEBUG_SYNC='now WAIT_FOR create_connection';
# Without fix, deadlock situation will occur on timeout of debug_syncs in
# default and con1. Because of this, change_user operation hangs.
change_user
connection con1;
ERROR HY000: Can't open shared library
connection default;
COUNT(*)
#
COUNT(*)
#
disconnect con2;
================================================================================
4.3 - DEADLOCK SCENARIO 3: CONCURRENT SHOW VARIABLES AND UNINSTALL PLUGIN
================================================================================
#
# INSTALL PLUGIN
#
INSTALL PLUGIN example SONAME 'ha_example.so';
connection con1;
# Acquiring LOCK_system_variables_hash and LOCK_plugin_delete
SET DEBUG_SYNC='acquired_LOCK_system_variables_hash SIGNAL uninstall_plugin WAIT_FOR go';
call show_vars();;
connect con2, localhost, root,,;
#
# UNINSTALL PLUGIN
#
SET DEBUG_SYNC='now WAIT_FOR uninstall_plugin';
UNINSTALL PLUGIN example;;
connection default;
# Uninstall will wait until SHOW VARIABLES releases LOCK_plugin_delete.
SET DEBUG_SYNC='now SIGNAL go';
# Connect con1 - reap
connection con1;
COUNT(*)
#
COUNT(*)
#
# Connect con2 - reap
connection con2;
================================================================================
CLEAN UP
================================================================================
connection default;
DROP PROCEDURE show_vars;
DROP PROCEDURE install_no_such_plugin;
SET DEBUG_SYNC='RESET';
disconnect con1;
disconnect con2;
# Restore SHOW_COMPATIBILITY_56 setting
SET @@global.show_compatibility_56 = @show_compatibility_56_save;
# Wait till we reached the initial number of concurrent sessions
|
