#
# exists as a global only
#
# 2010-01-21 OBN - Added 
#
#
source include/not_embedded.inc;
select @@global.rpl_semi_sync_master_enabled;
SET @start_global_value = @@global.rpl_semi_sync_master_enabled;

select @@global.rpl_semi_sync_master_enabled in (0,1);
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
select @@session.rpl_semi_sync_master_enabled;
show global variables like 'rpl_semi_sync_master_enabled';
show session variables like 'rpl_semi_sync_master_enabled';
select * from information_schema.global_variables where variable_name='rpl_semi_sync_master_enabled';
select * from information_schema.session_variables where variable_name='rpl_semi_sync_master_enabled';

#
# show that it's writable
#
set global rpl_semi_sync_master_enabled=0;
--error ER_GLOBAL_VARIABLE
set session rpl_semi_sync_master_enabled=0;
select @@global.rpl_semi_sync_master_enabled;
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
select @@session.rpl_semi_sync_master_enabled;
show global variables like 'rpl_semi_sync_master_enabled';
show session variables like 'rpl_semi_sync_master_enabled';
select * from information_schema.global_variables where variable_name='rpl_semi_sync_master_enabled';
select * from information_schema.session_variables where variable_name='rpl_semi_sync_master_enabled';
set global rpl_semi_sync_master_enabled=1;
--error ER_GLOBAL_VARIABLE
set session rpl_semi_sync_master_enabled=1;
select @@global.rpl_semi_sync_master_enabled;
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
select @@session.rpl_semi_sync_master_enabled;
show global variables like 'rpl_semi_sync_master_enabled';
show session variables like 'rpl_semi_sync_master_enabled';
select * from information_schema.global_variables where variable_name='rpl_semi_sync_master_enabled';
select * from information_schema.session_variables where variable_name='rpl_semi_sync_master_enabled';

#
# incorrect types
#
--error ER_WRONG_TYPE_FOR_VAR
set global rpl_semi_sync_master_enabled=1.1;
--error ER_WRONG_TYPE_FOR_VAR
set global rpl_semi_sync_master_enabled=1e1;
--error ER_WRONG_VALUE_FOR_VAR
set global rpl_semi_sync_master_enabled="some text";

#
# Test conflicting concurrent setting
#
--let $val_saved= `SELECT @@global.rpl_semi_sync_master_enabled`
connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
--let $iter=100
--disable_query_log
while ($iter)
{
  --connection con1
  --send_eval SET @@global.rpl_semi_sync_master_enabled = $iter % 2

  --connection con2
  --send_eval SET @@global.rpl_semi_sync_master_enabled = ($iter + 1) % 2

  --connection con1
  reap;
  --connection con2
  reap;

  --dec $iter
}
--enable_query_log
disconnect con1;
disconnect con2;

--connection default
--eval SET @@global.rpl_semi_sync_master_enabled = $val_saved

#
# Cleanup
#
SET @@global.rpl_semi_sync_master_enabled = @start_global_value;
select @@global.rpl_semi_sync_master_enabled;