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('<', 'tikv,tiflash,tidb', 'for test'); admin reload expr_pushdown_blacklist; explain select * from t where a < 1; delete from mysql.expr_pushdown_blacklist where name='<' and store_type = 'tikv,tiflash,tidb' and reason = 'for test'; admin reload expr_pushdown_blacklist; explain select * from t where a < 1; insert into mysql.expr_pushdown_blacklist values('lt', 'tikv,tiflash,tidb', 'for test'); admin reload expr_pushdown_blacklist; explain select * from t where a < 1; delete from mysql.expr_pushdown_blacklist where name='lt' and store_type = 'tikv,tiflash,tidb' and reason = 'for test'; admin reload expr_pushdown_blacklist; explain select * from t where a < 1;