################################################################################
#
# Creation Date: 19-Feb-2018
# Test Author: Mohit Joshi
#
# The aim of this testcase is to test persisted behavior of all system
# variables with SET PERSIST and RESET PERSIST IF EXISTS clauses.
#
# Test:
# 0. SET PERSIST is applicable on GLOBAL,dynamic variables only. Hence, verify
#    that variables in performance_schema.global_variables are actually
#    settable with SET GLOBAL.
# 1. Check that there are no persisted variable settings due to improper
#    cleanup by other testcases.
# 2. Test SET PERSIST. Verify persisted variables.
# 3. Restart server, it must preserve the persisted variable settings.
#    Verify persisted configuration.
# 4. Test RESET PERSIST IF EXISTS. Verify persisted variable settings are
#    removed.
# 5. Clean up.

# Note - Currently there are $total_global_vars global variables
#      -> SELECT COUNT(*) FROM performance_schema.global_variables
# In future, if a new global variable is added, it will be automatically
# picked up from performance_schema.global_variables table.
#
# Out of all $total_global_vars global vars, only $total_persistent_vars are
# global persistent variable. In future, if a new global persistent variable is
# added, it is the responsibility of the Dev to edit $total_persistent_vars.
################################################################################

--echo ***********************************************************************
--echo * Run only on debug build,non-windows as few server variables are not
--echo * available on all platforms.
--echo ***********************************************************************
--source include/have_debug.inc
--source include/not_windows.inc
--source include/have_binlog_format_row.inc
call mtr.add_suppression("Failed to set up SSL because of the following SSL library error");
call mtr.add_suppression("\\[Warning\\] .*MY-\\d+.* Changing innodb_extend_and_initialize not supported on this platform.");
call mtr.add_suppression("Failed to initialize TLS for channel: mysql_main");

let $total_global_vars=`SELECT COUNT(*) FROM performance_schema.global_variables where variable_name NOT LIKE 'ndb_%' AND variable_name NOT LIKE 'debug_%'`;
let $total_persistent_vars=448;

--echo ***************************************************************
--echo * 0. Verify that variables present in performance_schema.global
--echo * variables are actually global variables and can be set using
--echo * SET GLOBAL
--echo ***************************************************************

CREATE TABLE global_vars (id INT PRIMARY KEY AUTO_INCREMENT, var_name VARCHAR(64), var_value VARCHAR(1024));

# Following variables cannot be set in this format:
# -> SET GLOBAL innodb_monitor_enable = @@global.innodb_monitor_enable
# ERROR 1231 (42000): Variable 'innodb_monitor_enable' can't be set to the value of 'NULL'
# -> SET GLOBAL innodb_monitor_disable = @@global.innodb_monitor_disable;
# ERROR 1231 (42000): Variable 'innodb_monitor_disable' can't be set to the value of 'NULL'
# -> SET GLOBAL innodb_monitor_reset = @@global.innodb_monitor_reset;
# ERROR 1231 (42000): Variable 'innodb_monitor_reset' can't be set to the value of 'NULL'
# -> SET GLOBAL innodb_monitor_reset_all = @@global.innodb_monitor_reset_all;
# ERROR 1231 (42000): Variable 'innodb_monitor_reset_all' can't be set to the value of 'NULL'

# Bug#27534122 - RBR_EXEC_MODE DOES NOT SUPPORT GLOBAL SCOPE
INSERT INTO global_vars (var_name, var_value) SELECT * FROM
performance_schema.global_variables WHERE variable_name NOT IN
('innodb_monitor_enable',
'innodb_monitor_disable',
'innodb_monitor_reset',
'innodb_monitor_reset_all',
'rbr_exec_mode');

--let $count_vars= `SELECT COUNT(*) FROM global_vars;`
--let $var_id=1
--disable_query_log
--disable_warnings

while($var_id <= $count_vars)
{
--let $var_name= `SELECT var_name FROM global_vars WHERE id=$var_id;`
--error 0,ER_INCORRECT_GLOBAL_LOCAL_VAR,ER_WRONG_ARGUMENTS
--eval SET GLOBAL $var_name = @@global.$var_name
--inc $var_id
}

--enable_warnings
--enable_query_log

--echo ************************************************************
--echo * 1. Check that there are no persisted variable settings.
--echo ************************************************************

--let $assert_text= 'Expect 0 persisted variables.'
--let $assert_cond= [SELECT COUNT(*) as count FROM performance_schema.persisted_variables, count, 1] = 0
--source include/assert.inc

--echo
--echo ************************************************************
--echo * 2. Initialization. Test SET PERSIST. Verify persisted
--echo *    variables.
--echo ************************************************************

--let $MYSQLD_DATADIR= `select @@datadir;`

CREATE TABLE all_vars (id INT PRIMARY KEY AUTO_INCREMENT, var_name VARCHAR(64), var_value VARCHAR(1024));

# Currently we are not able to test below global variables
# 1. rbr_exec_mode
#
# because of open bugs (listed below).
#
# Bug#27534122 - RBR_EXEC_MODE DOES NOT SUPPORT GLOBAL SCOPE
#
# Once the bugs is fixed, below $bug_var_count must be modified along with the query.

--let $bug_var_count=1
--expr $expected_var_count=$total_global_vars - $bug_var_count

INSERT INTO all_vars (var_name, var_value)
SELECT * FROM performance_schema.global_variables
WHERE variable_name NOT IN
('rbr_exec_mode')
AND variable_name NOT LIKE 'ndb_%'
AND variable_name NOT LIKE 'debug_%'
ORDER BY variable_name;

--let $count_vars= `SELECT COUNT(*) FROM all_vars;`
--echo
--let $assert_text= Expect 500+ variables in the table. Due to open Bugs, we are checking for fewer 
--let $assert_cond= [SELECT COUNT(*) as count FROM all_vars, count, 1] = $expected_var_count
--source include/assert.inc

--echo
--echo # Test SET PERSIST
--let $var_id=1
--disable_query_log
--disable_warnings
while($var_id <= $count_vars)
{
  --let $var_names= `SELECT var_name FROM all_vars WHERE id=$var_id;`
  --error 0,ER_INCORRECT_GLOBAL_LOCAL_VAR,ER_WRONG_VALUE_FOR_VAR
  --eval SET PERSIST $var_names = @@GLOBAL.$var_names
  --inc $var_id
}
# Below 4 tests have default value as "" and these variables can't be set to
# empty value. Hence, setting them separately.
SET PERSIST innodb_monitor_enable="latch";
SET PERSIST innodb_monitor_disable="latch";
SET PERSIST innodb_monitor_reset="latch";
SET PERSIST innodb_monitor_reset_all="latch";

--enable_warnings
--enable_query_log
--echo
--let $assert_text= Expect $total_persistent_vars persisted variables in the table.
--let $assert_cond= [SELECT COUNT(*) as count FROM performance_schema.persisted_variables, count, 1] = $total_persistent_vars
--source include/assert.inc

--echo
--echo ************************************************************
--echo * 3. Restart server, it must preserve the persisted variable
--echo *    settings. Verify persisted configuration.
--echo ************************************************************

--source include/restart_mysqld.inc
--source include/wait_until_connected_again.inc

--echo
--let $assert_text= Expect $total_persistent_vars persisted variables in persisted_variables table.
--let $assert_cond= [SELECT COUNT(*) as count FROM performance_schema.persisted_variables, count, 1] = $total_persistent_vars
--source include/assert.inc

# The fix for the Bug #35529604 declares the character_set_server variable as PERSIST_AS_READONLY. Because of this, the said variable is
# persisted as "mysql_static_variables" and during the start up of the server, the source is not updated properly. So, for the assert
# conditions below, the count is reduced by 1 because the character_set_server variable has VARIABLE_SOURCE=COMPILED.
# There is a bug filed (Bug #36221843) to migrate all the options from my_long_options[] to Sys_vars. Fixing this bug would fix this.
--let $assert_text= Expect $total_persistent_vars persisted variables shown as PERSISTED in variables_info table.
--let $assert_cond= [SELECT COUNT(*) as count FROM performance_schema.variables_info WHERE variable_source="PERSISTED", count, 1] = $total_persistent_vars-1
--source include/assert.inc

 --let $assert_text= Expect $total_persistent_vars persisted variables with matching peristed and global values.
 --let $assert_cond= [SELECT COUNT(*) as count FROM performance_schema.variables_info vi JOIN performance_schema.persisted_variables pv JOIN performance_schema.global_variables gv ON vi.variable_name=pv.variable_name AND vi.variable_name=gv.variable_name AND pv.variable_value=gv.variable_value WHERE vi.variable_source="PERSISTED", count, 1] = $total_persistent_vars-1
--source include/assert.inc

--echo
--echo ************************************************************
--echo * 4. Test RESET PERSIST IF EXISTS. Verify persisted variable
--echo *    settings are removed.
--echo ************************************************************

--disable_query_log
--disable_warnings
--let $var_id=1
while ( $var_id <= $count_vars )
{
  --let $var_names= `SELECT var_name FROM all_vars WHERE id=$var_id`
  --eval RESET PERSIST IF EXISTS $var_names
  --inc $var_id
}
--enable_query_log
--enable_warnings

--echo
--let $assert_text= 'Expect 0 persisted variables.'
--let $assert_cond= [SELECT COUNT(*) as count FROM performance_schema.persisted_variables, count, 1] = 0
--source include/assert.inc

--echo
--echo ************************************************************
--echo * 5. Clean up.
--echo ************************************************************

--let $count_vars=
--let $var_id=
--let $var_names=
--remove_file $MYSQLD_DATADIR/mysqld-auto.cnf
DROP TABLE all_vars;
DROP TABLE global_vars;
# Restart
--let restart_parameters=
--source include/restart_mysqld.inc