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Current Path : /home/usr.opt/mysql57/mysql-test/suite/perfschema/r/

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Current File : /home/usr.opt/mysql57/mysql-test/suite/perfschema/r/show_plugin_56.result

================================================================================
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

Man Man