⚝
One Hat Cyber Team
⚝
Your IP:
216.73.216.124
Server IP:
50.28.103.30
Server:
Linux host.jcukjv-lwsites.com 4.18.0-553.22.1.el8_10.x86_64 #1 SMP Tue Sep 24 05:16:59 EDT 2024 x86_64
Server Software:
nginx/1.28.0
PHP Version:
8.3.12
Buat File
|
Buat Folder
Eksekusi
Dir :
~
/
www
/
server
/
mysql
/
mysql-test
/
r
/
View File Name :
null_key_icp.result
set optimizer_switch='index_condition_pushdown=on'; drop table if exists t1,t2; SET sql_mode = 'NO_ENGINE_SUBSTITUTION'; Warnings: Warning 3090 Changing sql mode 'NO_AUTO_CREATE_USER' is deprecated. It will be removed in a future release. create table t1 (a int, b int not null,unique key (a,b),index(b)) engine=myisam; insert ignore into t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(null,7),(9,9),(8,8),(7,7),(null,9),(null,9),(6,6); Warnings: Warning 1062 Duplicate entry '6-6' for key 'a' explain select * from t1 where a is null; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref a a 5 const 3 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where isnull(`test`.`t1`.`a`) explain select * from t1 where a is null and b = 2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref a,b a 9 const,const 1 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 2) and isnull(`test`.`t1`.`a`)) explain select * from t1 where a is null and b = 7; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref a,b a 9 const,const 1 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 7) and isnull(`test`.`t1`.`a`)) explain select * from t1 where a=2 and b = 2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL const a,b a 9 const,const 1 100.00 Using index Warnings: Note 1003 /* select#1 */ select '2' AS `a`,'2' AS `b` from `test`.`t1` where 1 explain select * from t1 where a<=>b limit 2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL index NULL a 9 NULL 12 10.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (`test`.`t1`.`a` <=> `test`.`t1`.`b`) limit 2 explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL range a,b a 9 NULL 3 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((isnull(`test`.`t1`.`a`) or ((`test`.`t1`.`a` > 0) and (`test`.`t1`.`a` < 3))) and (`test`.`t1`.`b` < 5)) limit 3 explain select * from t1 where (a is null or a = 7) and b=7; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref_or_null a,b a 9 const,const 2 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 7) and (isnull(`test`.`t1`.`a`) or (`test`.`t1`.`a` = 7))) explain select * from t1 where (a is null or a = 7) and b=7 order by a; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref_or_null a,b a 9 const,const 2 100.00 Using where; Using index; Using filesort Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 7) and (isnull(`test`.`t1`.`a`) or (`test`.`t1`.`a` = 7))) order by `test`.`t1`.`a` explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref a,b a 5 const 3 40.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((isnull(`test`.`t1`.`a`) and (`test`.`t1`.`b` > `test`.`t1`.`a`)) or ((`test`.`t1`.`b` = 7) and isnull(`test`.`t1`.`a`))) limit 2 explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL range a,b a 9 NULL 3 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (((`test`.`t1`.`b` = 9) and isnull(`test`.`t1`.`a`)) or ((`test`.`t1`.`b` = 7) and isnull(`test`.`t1`.`a`))) limit 3 explain select * from t1 where a > 1 and a < 3 limit 1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL range a a 5 NULL 1 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`a` > 1) and (`test`.`t1`.`a` < 3)) limit 1 explain select * from t1 where a > 8 and a < 9; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL range a a 5 NULL 1 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`a` > 8) and (`test`.`t1`.`a` < 9)) select * from t1 where a is null; a b NULL 7 NULL 9 NULL 9 select * from t1 where a is null and b = 7; a b NULL 7 select * from t1 where a<=>b limit 2; a b 1 1 2 2 select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3; a b 1 1 2 2 select * from t1 where (a is null or a > 0 and a < 3) and b > 7 limit 3; a b NULL 9 NULL 9 select * from t1 where (a is null or a = 7) and b=7; a b 7 7 NULL 7 select * from t1 where a is null and b=9 or a is null and b=7 limit 3; a b NULL 7 NULL 9 NULL 9 select * from t1 where a > 1 and a < 3 limit 1; a b 2 2 select * from t1 where a > 8 and a < 9; a b create table t2 like t1; insert into t2 select * from t1; alter table t1 modify b blob not null, add c int not null, drop key a, add unique key (a,b(20),c), drop key b, add key (b(10)); explain select * from t1 where a is null and b = 2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref a,b a 5 const 3 10.00 Using where Warnings: Warning 1739 Cannot use ref access on index 'b' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'a' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'b' due to type or collation conversion on field 'b' Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (isnull(`test`.`t1`.`a`) and (`test`.`t1`.`b` = 2)) explain select * from t1 where a is null and b = 2 and c=0; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref a,b a 5 const 3 8.33 Using where Warnings: Warning 1739 Cannot use ref access on index 'b' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'a' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'b' due to type or collation conversion on field 'b' Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((`test`.`t1`.`c` = 0) and isnull(`test`.`t1`.`a`) and (`test`.`t1`.`b` = 2)) explain select * from t1 where a is null and b = 7 and c=0; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref a,b a 5 const 3 8.33 Using where Warnings: Warning 1739 Cannot use ref access on index 'b' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'a' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'b' due to type or collation conversion on field 'b' Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((`test`.`t1`.`c` = 0) and isnull(`test`.`t1`.`a`) and (`test`.`t1`.`b` = 7)) explain select * from t1 where a=2 and b = 2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref a,b a 5 const 1 10.00 Using where Warnings: Warning 1739 Cannot use ref access on index 'b' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'a' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'b' due to type or collation conversion on field 'b' Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((`test`.`t1`.`a` = 2) and (`test`.`t1`.`b` = 2)) explain select * from t1 where a<=>b limit 2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 12 10.00 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a` <=> `test`.`t1`.`b`) limit 2 explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 and c=0 limit 3; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL range a,b a 5 NULL 5 8.33 Using where Warnings: Warning 1739 Cannot use range access on index 'a' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'b' due to type or collation conversion on field 'b' Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((`test`.`t1`.`c` = 0) and (isnull(`test`.`t1`.`a`) or ((`test`.`t1`.`a` > 0) and (`test`.`t1`.`a` < 3))) and (`test`.`t1`.`b` < 5)) limit 3 explain select * from t1 where (a is null or a = 7) and b=7 and c=0; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref_or_null a,b a 5 const 4 8.33 Using where Warnings: Warning 1739 Cannot use ref access on index 'b' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'a' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'b' due to type or collation conversion on field 'b' Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((`test`.`t1`.`c` = 0) and (isnull(`test`.`t1`.`a`) or (`test`.`t1`.`a` = 7)) and (`test`.`t1`.`b` = 7)) explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref a,b a 5 const 3 40.00 Using where Warnings: Warning 1739 Cannot use ref access on index 'b' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'a' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'b' due to type or collation conversion on field 'b' Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((isnull(`test`.`t1`.`a`) and (`test`.`t1`.`b` > `test`.`t1`.`a`)) or (isnull(`test`.`t1`.`a`) and (`test`.`t1`.`b` = 7))) limit 2 explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref a,b a 5 const 3 19.00 Using where Warnings: Warning 1739 Cannot use ref access on index 'b' due to type or collation conversion on field 'b' Warning 1739 Cannot use ref access on index 'b' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'a' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'b' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'a' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'b' due to type or collation conversion on field 'b' Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((isnull(`test`.`t1`.`a`) and (`test`.`t1`.`b` = 9)) or (isnull(`test`.`t1`.`a`) and (`test`.`t1`.`b` = 7))) limit 3 explain select * from t1 where a > 1 and a < 3 limit 1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL range a a 5 NULL 1 100.00 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((`test`.`t1`.`a` > 1) and (`test`.`t1`.`a` < 3)) limit 1 explain select * from t1 where a is null and b=7 or a > 1 and a < 3 limit 1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL range a,b a 5 NULL 4 100.00 Using where Warnings: Warning 1739 Cannot use ref access on index 'b' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'a' due to type or collation conversion on field 'b' Warning 1739 Cannot use range access on index 'b' due to type or collation conversion on field 'b' Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((isnull(`test`.`t1`.`a`) and (`test`.`t1`.`b` = 7)) or ((`test`.`t1`.`a` > 1) and (`test`.`t1`.`a` < 3))) limit 1 explain select * from t1 where a > 8 and a < 9; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL range a a 5 NULL 1 100.00 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((`test`.`t1`.`a` > 8) and (`test`.`t1`.`a` < 9)) explain select * from t1 where b like "6%"; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL range b b 12 NULL 1 100.00 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`b` like '6%') select * from t1 where a is null; a b c NULL 7 0 NULL 9 0 NULL 9 0 select * from t1 where a is null and b = 7 and c=0; a b c NULL 7 0 select * from t1 where a<=>b limit 2; a b c 1 1 0 2 2 0 select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3; a b c 1 1 0 2 2 0 select * from t1 where (a is null or a > 0 and a < 3) and b > 7 limit 3; a b c NULL 9 0 NULL 9 0 select * from t1 where (a is null or a = 7) and b=7 and c=0; a b c 7 7 0 NULL 7 0 select * from t1 where a is null and b=9 or a is null and b=7 limit 3; a b c NULL 7 0 NULL 9 0 NULL 9 0 select * from t1 where b like "6%"; a b c 6 6 0 drop table t1; rename table t2 to t1; alter table t1 modify b int null; insert into t1 values (7,null), (8,null), (8,7); explain select * from t1 where a = 7 and (b=7 or b is null); id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref_or_null a,b a 10 const,const 2 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`a` = 7) and ((`test`.`t1`.`b` = 7) or isnull(`test`.`t1`.`b`))) select * from t1 where a = 7 and (b=7 or b is null); a b 7 7 7 NULL explain select * from t1 where (a = 7 or a is null) and (b=7 or b is null); id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref_or_null a,b a 5 const 4 33.33 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (((`test`.`t1`.`a` = 7) or isnull(`test`.`t1`.`a`)) and ((`test`.`t1`.`b` = 7) or isnull(`test`.`t1`.`b`))) select * from t1 where (a = 7 or a is null) and (b=7 or b is null); a b 7 NULL 7 7 NULL 7 explain select * from t1 where (a = 7 or a is null) and (a = 7 or a is null); id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref_or_null a a 5 const 5 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (((`test`.`t1`.`a` = 7) or isnull(`test`.`t1`.`a`)) and ((`test`.`t1`.`a` = 7) or isnull(`test`.`t1`.`a`))) select * from t1 where (a = 7 or a is null) and (a = 7 or a is null); a b 7 NULL 7 7 NULL 7 NULL 9 NULL 9 create table t2 (a int); insert into t2 values (7),(8); explain select * from t2 straight_join t1 where t1.a=t2.a and b is null; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t1 NULL ref a,b a 10 test.t2.a,const 2 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t2` straight_join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and isnull(`test`.`t1`.`b`)) drop index b on t1; explain select * from t2,t1 where t1.a=t2.a and b is null; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t1 NULL ref a a 10 test.t2.a,const 2 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t2` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and isnull(`test`.`t1`.`b`)) select * from t2,t1 where t1.a=t2.a and b is null; a a b 7 7 NULL 8 8 NULL explain select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null); id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t1 NULL ref_or_null a a 10 test.t2.a,const 4 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t2` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and ((`test`.`t1`.`b` = 7) or isnull(`test`.`t1`.`b`))) select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null); a a b 7 7 7 7 7 NULL 8 8 7 8 8 NULL explain select * from t2,t1 where (t1.a=t2.a or t1.a is null) and b= 7; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t1 NULL ref_or_null a a 10 test.t2.a,const 4 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t2` join `test`.`t1` where ((`test`.`t1`.`b` = 7) and ((`test`.`t1`.`a` = `test`.`t2`.`a`) or isnull(`test`.`t1`.`a`))) select * from t2,t1 where (t1.a=t2.a or t1.a is null) and b= 7; a a b 7 7 7 7 NULL 7 8 8 7 8 NULL 7 explain select * from t2,t1 where (t1.a=t2.a or t1.a is null) and (b= 7 or b is null); id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t1 NULL ref_or_null a a 5 test.t2.a 4 19.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t2` join `test`.`t1` where (((`test`.`t1`.`a` = `test`.`t2`.`a`) or isnull(`test`.`t1`.`a`)) and ((`test`.`t1`.`b` = 7) or isnull(`test`.`t1`.`b`))) select * from t2,t1 where (t1.a=t2.a or t1.a is null) and (b= 7 or b is null); a a b 7 7 NULL 7 7 7 7 NULL 7 8 8 NULL 8 8 7 8 NULL 7 insert into t2 values (null),(6); delete from t1 where a=8; explain select * from t2,t1 where t1.a=t2.a or t1.a is null; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 4 100.00 NULL 1 SIMPLE t1 NULL ref_or_null a a 5 test.t2.a 4 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t2` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) or isnull(`test`.`t1`.`a`)) explain select * from t2,t1 where t1.a<=>t2.a or (t1.a is null and t1.b <> 9); id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 4 100.00 NULL 1 SIMPLE t1 NULL ref_or_null a a 5 test.t2.a 4 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t2` join `test`.`t1` where ((`test`.`t1`.`a` <=> `test`.`t2`.`a`) or (isnull(`test`.`t1`.`a`) and (`test`.`t1`.`b` <> 9))) select * from t2,t1 where t1.a<=>t2.a or (t1.a is null and t1.b <> 9); a a b 7 7 NULL 7 7 7 7 NULL 7 8 NULL 7 NULL NULL 7 NULL NULL 9 NULL NULL 9 6 6 6 6 NULL 7 drop table t1,t2; CREATE TABLE t1 ( id int(10) unsigned NOT NULL auto_increment, uniq_id int(10) unsigned default NULL, PRIMARY KEY (id), UNIQUE KEY idx1 (uniq_id) ) ENGINE=MyISAM; CREATE TABLE t2 ( id int(10) unsigned NOT NULL auto_increment, uniq_id int(10) unsigned default NULL, PRIMARY KEY (id) ) ENGINE=MyISAM; INSERT INTO t1 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL); INSERT INTO t2 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL); explain select id from t1 where uniq_id is null; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref idx1 idx1 5 const 5 100.00 Using index condition Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id` from `test`.`t1` where isnull(`test`.`t1`.`uniq_id`) explain select id from t1 where uniq_id =1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL const idx1 idx1 5 const 1 100.00 NULL Warnings: Note 1003 /* select#1 */ select '3' AS `id` from `test`.`t1` where 1 UPDATE t1 SET id=id+100 where uniq_id is null; UPDATE t2 SET id=id+100 where uniq_id is null; select id from t1 where uniq_id is null; id 101 102 105 106 109 110 select id from t2 where uniq_id is null; id 101 102 105 106 109 110 DELETE FROM t1 WHERE uniq_id IS NULL; DELETE FROM t2 WHERE uniq_id IS NULL; SELECT * FROM t1 ORDER BY uniq_id, id; id uniq_id 3 1 4 2 7 3 8 4 SELECT * FROM t2 ORDER BY uniq_id, id; id uniq_id 3 1 4 2 7 3 8 4 DROP table t1,t2; CREATE TABLE `t1` ( `order_id` char(32) NOT NULL default '', `product_id` char(32) NOT NULL default '', `product_type` int(11) NOT NULL default '0', PRIMARY KEY (`order_id`,`product_id`,`product_type`) ) ENGINE=MyISAM; CREATE TABLE `t2` ( `order_id` char(32) NOT NULL default '', `product_id` char(32) NOT NULL default '', `product_type` int(11) NOT NULL default '0', PRIMARY KEY (`order_id`,`product_id`,`product_type`) ) ENGINE=MyISAM; INSERT INTO t1 (order_id, product_id, product_type) VALUES ('3d7ce39b5d4b3e3d22aaafe9b633de51',1206029, 3), ('3d7ce39b5d4b3e3d22aaafe9b633de51',5880836, 3), ('9d9aad7764b5b2c53004348ef8d34500',2315652, 3); INSERT INTO t2 (order_id, product_id, product_type) VALUES ('9d9aad7764b5b2c53004348ef8d34500',2315652, 3); select t1.* from t1 left join t2 using(order_id, product_id, product_type) where t2.order_id=NULL; order_id product_id product_type select t1.* from t1 left join t2 using(order_id, product_id, product_type) where t2.order_id is NULL; order_id product_id product_type 3d7ce39b5d4b3e3d22aaafe9b633de51 1206029 3 3d7ce39b5d4b3e3d22aaafe9b633de51 5880836 3 drop table t1,t2; create table t1 (id int); insert into t1 values (null), (0); create table t2 (id int); insert into t2 values (null); select * from t1, t2 where t1.id = t2.id; id id alter table t1 add key id (id); select * from t1, t2 where t1.id = t2.id; id id drop table t1,t2; create table t1 ( id integer, id2 integer not null, index (id), index (id2) ); insert into t1 values(null,null),(1,1); Warnings: Warning 1048 Column 'id2' cannot be null select * from t1; id id2 NULL 0 1 1 select * from t1 where id <=> null; id id2 NULL 0 select * from t1 where id <=> null or id > 0; id id2 NULL 0 1 1 select * from t1 where id is null or id > 0; id id2 NULL 0 1 1 select * from t1 where id2 <=> null or id2 > 0; id id2 1 1 select * from t1 where id2 is null or id2 > 0; id id2 1 1 delete from t1 where id <=> NULL; select * from t1; id id2 1 1 drop table t1; CREATE TABLE t1 (a int); CREATE TABLE t2 (a int, b int, INDEX idx(a)); CREATE TABLE t3 (b int, INDEX idx(b)); CREATE TABLE t4 (b int, INDEX idx(b)); INSERT INTO t1 VALUES (1), (2), (3), (4); INSERT INTO t2 VALUES (1, 1), (3, 1); INSERT INTO t3 VALUES (NULL), (NULL), (NULL), (NULL), (NULL), (NULL), (NULL), (NULL), (NULL), (NULL); INSERT INTO t4 SELECT * FROM t3; INSERT INTO t3 SELECT * FROM t4; INSERT INTO t4 SELECT * FROM t3; INSERT INTO t3 SELECT * FROM t4; INSERT INTO t4 SELECT * FROM t3; INSERT INTO t3 SELECT * FROM t4; INSERT INTO t4 SELECT * FROM t3; INSERT INTO t3 SELECT * FROM t4; INSERT INTO t4 SELECT * FROM t3; INSERT INTO t3 SELECT * FROM t4; INSERT INTO t4 SELECT * FROM t3; INSERT INTO t3 SELECT * FROM t4; INSERT INTO t4 SELECT * FROM t3; INSERT INTO t3 SELECT * FROM t4; INSERT INTO t4 SELECT * FROM t3; INSERT INTO t3 SELECT * FROM t4; INSERT INTO t3 VALUES (2), (3); ANALYZE table t1, t2, t3; Table Op Msg_type Msg_text test.t1 analyze status OK test.t2 analyze status OK test.t3 analyze status OK SELECT COUNT(*) FROM t3; COUNT(*) 15972 EXPLAIN SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.b=t3.b; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 4 100.00 NULL 1 SIMPLE t2 NULL ALL idx NULL NULL NULL 2 100.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 NULL ref idx idx 5 test.t2.b 1 100.00 Using index Warnings: Note 1003 /* select#1 */ select sql_calc_found_rows `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`b` AS `b` from `test`.`t1` left join `test`.`t2` on((`test`.`t2`.`a` = `test`.`t1`.`a`)) left join `test`.`t3` on((`test`.`t3`.`b` = `test`.`t2`.`b`)) where 1 FLUSH STATUS ; SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.b=t3.b; a a b b 1 1 1 NULL 3 3 1 NULL 2 NULL NULL NULL 4 NULL NULL NULL SELECT FOUND_ROWS(); FOUND_ROWS() 4 SHOW STATUS LIKE "handler_read%"; Variable_name Value Handler_read_first 0 Handler_read_key 2 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_rnd 0 Handler_read_rnd_next 8 DROP TABLE t1,t2,t3,t4; CREATE TABLE t1 ( a int(11) default NULL, b int(11) default NULL, KEY a (a,b) ); INSERT INTO t1 VALUES (0,10),(0,11),(0,12); CREATE TABLE t2 ( a int(11) default NULL, b int(11) default NULL, KEY a (a) ); INSERT INTO t2 VALUES (3,NULL),(3,11),(3,12); SELECT * FROM t2 inner join t1 WHERE ( t1.a = 0 OR t1.a IS NULL) AND t2.a = 3 AND t2.b = t1.b; a b a b 3 11 0 11 3 12 0 12 drop table t1, t2; End of 5.0 tests # # Bug#54608 Query using IN + OR + IS TRUE and IS NULL returns # NULL when should be empty # CREATE TABLE t1 (a INT, KEY (a)); INSERT INTO t1 VALUES (1), (2), (NULL); explain SELECT a FROM t1 WHERE a IN (42) OR (a IS TRUE AND a IS NULL); id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref_or_null a a 5 const 2 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where ((`test`.`t1`.`a` = 42) or ((`test`.`t1`.`a` is true) and isnull(`test`.`t1`.`a`))) SELECT a FROM t1 WHERE a IN (42) OR (a IS TRUE AND a IS NULL); a explain SELECT a FROM t1 WHERE a IN (42) OR (a=NULL); id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ref_or_null a a 5 const 4 100.00 Using where; Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where ((`test`.`t1`.`a` = 42) or (`test`.`t1`.`a` = NULL)) SELECT a FROM t1 WHERE a IN (42) OR (a=NULL); a drop table t1; SET sql_mode = default; set optimizer_switch=default;