use test;
drop table if exists t;
create table t (a int);

explain select * from t where a < 1;

insert into mysql.opt_rule_blacklist values('predicate_push_down');

admin reload opt_rule_blacklist;

explain select * from t where a < 1;

delete from mysql.opt_rule_blacklist where name='predicate_push_down';

admin reload opt_rule_blacklist;

explain select * from t where a < 1;

insert into mysql.expr_pushdown_blacklist values('<');

admin reload expr_pushdown_blacklist;

explain select * from t where a < 1;

delete from mysql.expr_pushdown_blacklist where name='<';

admin reload expr_pushdown_blacklist;

explain select * from t where a < 1;

insert into mysql.expr_pushdown_blacklist values('lt');

admin reload expr_pushdown_blacklist;

explain select * from t where a < 1;

delete from mysql.expr_pushdown_blacklist where name='lt';

admin reload expr_pushdown_blacklist;

explain select * from t where a < 1;
