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# ulong session
SET @start_global_value = @@global.mrr_buffer_size;
#
# exists as global only
#
select @@global.mrr_buffer_size;
select @@session.mrr_buffer_size;
show global variables like 'mrr_buffer_size';
show session variables like 'mrr_buffer_size';
select * from information_schema.global_variables where variable_name='mrr_buffer_size';
select * from information_schema.session_variables where variable_name='mrr_buffer_size';
#
# show that it's writable
#
set global mrr_buffer_size=10;
select @@global.mrr_buffer_size;
set session mrr_buffer_size=10;
select @@session.mrr_buffer_size;
#
# incorrect types
#
--error ER_WRONG_TYPE_FOR_VAR
set global mrr_buffer_size=1.1;
--error ER_WRONG_TYPE_FOR_VAR
set session mrr_buffer_size=1e1;
--error ER_WRONG_TYPE_FOR_VAR
set global mrr_buffer_size="foo";
#
# min/max values, block size
#
set global mrr_buffer_size=0;
select @@global.mrr_buffer_size;
set session mrr_buffer_size=cast(-1 as unsigned int);
select @@session.mrr_buffer_size;
SET @@global.mrr_buffer_size = @start_global_value;
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