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use test;
drop table if exists t;
create table t (a int);
explain select * from t where a < 1;
id estRows task access object operator info
TableReader_7 3323.33 root data:Selection_6
└─Selection_6 3323.33 cop[tikv] lt(test.t.a, 1)
└─TableFullScan_5 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
insert into mysql.opt_rule_blacklist values('predicate_push_down');
admin reload opt_rule_blacklist;
explain select * from t where a < 1;
id estRows task access object operator info
Selection_5 8000.00 root lt(test.t.a, 1)
└─TableReader_7 10000.00 root data:TableFullScan_6
└─TableFullScan_6 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
delete from mysql.opt_rule_blacklist where name='predicate_push_down';
admin reload opt_rule_blacklist;
explain select * from t where a < 1;
id estRows task access object operator info
TableReader_7 3323.33 root data:Selection_6
└─Selection_6 3323.33 cop[tikv] lt(test.t.a, 1)
└─TableFullScan_5 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
insert into mysql.expr_pushdown_blacklist values('<', 'tikv,tiflash,tidb', 'for test');
admin reload expr_pushdown_blacklist;
explain select * from t where a < 1;
id estRows task access object operator info
Selection_5 8000.00 root lt(test.t.a, 1)
└─TableReader_7 10000.00 root data:TableFullScan_6
└─TableFullScan_6 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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;
id estRows task access object operator info
TableReader_7 3323.33 root data:Selection_6
└─Selection_6 3323.33 cop[tikv] lt(test.t.a, 1)
└─TableFullScan_5 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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;
id estRows task access object operator info
Selection_5 8000.00 root lt(test.t.a, 1)
└─TableReader_7 10000.00 root data:TableFullScan_6
└─TableFullScan_6 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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;
id estRows task access object operator info
TableReader_7 3323.33 root data:Selection_6
└─Selection_6 3323.33 cop[tikv] lt(test.t.a, 1)
└─TableFullScan_5 10000.00 cop[tikv] table:t keep order:false, stats:pseudo