select @@session.engine_condition_pushdown,
@@global.engine_condition_pushdown,
@@session.optimizer_switch, @@global.optimizer_switch;
@@session.engine_condition_pushdown	@@global.engine_condition_pushdown	@@session.optimizer_switch	@@global.optimizer_switch
0	0	index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=off	index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=off