# # Run subselect.test without semi-join optimization (test materialize) # select @@optimizer_switch like '%subquery_cache=on%'; set optimizer_switch='subquery_cache=off'; set join_cache_level=1; set @join_cache_level_for_subselect_test=@@join_cache_level; --source subselect.test set optimizer_switch=default; select @@optimizer_switch like '%subquery_cache=on%'; set @join_cache_level_for_subselect_test=NULL;