DROP TABLE IF EXISTS t1;
create table t1 (id int primary key, value int, value2 varchar(200), index(value)) engine=xengine;
optimize table t1;
Table	Op	Msg_type	Msg_text
test.t1	optimize	status	OK
select variable_value into @a from information_schema.global_status where variable_name='xengine_block_cache_add';
select case when variable_value - @a > 20 then 'true' else 'false' end from information_schema.global_status where variable_name='xengine_block_cache_add';
case when variable_value - @a > 20 then 'true' else 'false' end
false
select count(*) from t1;
count(*)
50000
select case when variable_value - @a > 100 then 'true' else 'false' end from information_schema.global_status where variable_name='xengine_block_cache_add';
case when variable_value - @a > 100 then 'true' else 'false' end
true
DROP TABLE t1;