#
# exists as a session only
#
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
select @@global.pseudo_thread_id;
select @@session.pseudo_thread_id=0;
show global variables like 'pseudo_thread_id';
--replace_column 2 #
show session variables like 'pseudo_thread_id';
select * from information_schema.global_variables where variable_name='pseudo_thread_id';
--replace_column 2 #
select * from information_schema.session_variables where variable_name='pseudo_thread_id';

#
# show that it's writable
#
set session pseudo_thread_id=1;
select @@session.pseudo_thread_id;
--error ER_LOCAL_VARIABLE
set global pseudo_thread_id=1;

#
# incorrect types
#
--error ER_WRONG_TYPE_FOR_VAR
set session pseudo_thread_id=1.1;
--error ER_WRONG_TYPE_FOR_VAR
set session pseudo_thread_id=1e1;
--error ER_WRONG_TYPE_FOR_VAR
set session pseudo_thread_id="foo";