|
|
CALL mtr.add_suppression("==[0-9]*== Warning: set address range perms: large range");
|
|
|
drop table if exists t1;
|
|
|
create table t1 (id int not null, str char(10), unique(str)) charset utf8mb4;
|
|
|
explain select * from t1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select NULL AS `id`,NULL AS `str` from `test`.`t1`
|
|
|
insert into t1 values (1, null),(2, null),(3, "foo"),(4, "bar");
|
|
|
select * from t1 where str is null;
|
|
|
id str
|
|
|
1 NULL
|
|
|
2 NULL
|
|
|
select * from t1 where str="foo";
|
|
|
id str
|
|
|
3 foo
|
|
|
explain select * from t1 where str is null;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL ref str str 41 const 1 100.00 Using index condition
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`str` AS `str` from `test`.`t1` where (`test`.`t1`.`str` is null)
|
|
|
explain format=json select * from t1 where str is null;
|
|
|
EXPLAIN
|
|
|
{
|
|
|
"query_block": {
|
|
|
"select_id": 1,
|
|
|
"cost_info": {
|
|
|
"query_cost": "0.35"
|
|
|
},
|
|
|
"table": {
|
|
|
"table_name": "t1",
|
|
|
"access_type": "ref",
|
|
|
"possible_keys": [
|
|
|
"str"
|
|
|
],
|
|
|
"key": "str",
|
|
|
"used_key_parts": [
|
|
|
"str"
|
|
|
],
|
|
|
"key_length": "41",
|
|
|
"ref": [
|
|
|
"const"
|
|
|
],
|
|
|
"rows_examined_per_scan": 1,
|
|
|
"rows_produced_per_join": 1,
|
|
|
"filtered": "100.00",
|
|
|
"index_condition": "(`test`.`t1`.`str` is null)",
|
|
|
"cost_info": {
|
|
|
"read_cost": "0.25",
|
|
|
"eval_cost": "0.10",
|
|
|
"prefix_cost": "0.35",
|
|
|
"data_read_per_join": "48"
|
|
|
},
|
|
|
"used_columns": [
|
|
|
"id",
|
|
|
"str"
|
|
|
]
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`str` AS `str` from `test`.`t1` where (`test`.`t1`.`str` is null)
|
|
|
explain select * from t1 where str="foo";
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL const str str 41 const 1 100.00 NULL
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select '3' AS `id`,'foo' AS `str` from `test`.`t1` where true
|
|
|
explain select * from t1 ignore key (str) where str="foo";
|
|
|
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 25.00 Using where
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`str` AS `str` from `test`.`t1` IGNORE INDEX (`str`) where (`test`.`t1`.`str` = 'foo')
|
|
|
explain select * from t1 use key (str,str) where str="foo";
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL const str str 41 const 1 100.00 NULL
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select '3' AS `id`,'foo' AS `str` from `test`.`t1` USE INDEX (`str`) USE INDEX (`str`) where true
|
|
|
explain select * from t1 use key (str,str,foo) where str="foo";
|
|
|
ERROR 42000: Key 'foo' doesn't exist in table 't1'
|
|
|
explain select * from t1 ignore key (str,str,foo) where str="foo";
|
|
|
ERROR 42000: Key 'foo' doesn't exist in table 't1'
|
|
|
drop table t1;
|
|
|
explain select 1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1`
|
|
|
create table t1 (a int not null);
|
|
|
explain select count(*) from t1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select count(0) AS `count(*)` from `test`.`t1`
|
|
|
insert into t1 values(1);
|
|
|
explain select count(*) from t1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select count(0) AS `count(*)` from `test`.`t1`
|
|
|
insert into t1 values(1);
|
|
|
explain select count(*) from t1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select count(0) AS `count(*)` from `test`.`t1`
|
|
|
drop table t1;
|
|
|
set names koi8r;
|
|
|
create table <EFBFBD><EFBFBD><EFBFBD> (<EFBFBD><EFBFBD><EFBFBD>0 int, <EFBFBD><EFBFBD><EFBFBD>1 int, key <EFBFBD><EFBFBD><EFBFBD>0 (<EFBFBD><EFBFBD><EFBFBD>0), key <EFBFBD><EFBFBD><EFBFBD>01 (<EFBFBD><EFBFBD><EFBFBD>0,<EFBFBD><EFBFBD><EFBFBD>1));
|
|
|
insert into <EFBFBD><EFBFBD><EFBFBD> (<EFBFBD><EFBFBD><EFBFBD>0) values (1);
|
|
|
insert into <EFBFBD><EFBFBD><EFBFBD> (<EFBFBD><EFBFBD><EFBFBD>0) values (2);
|
|
|
explain select <EFBFBD><EFBFBD><EFBFBD>0 from <EFBFBD><EFBFBD><EFBFBD> where <EFBFBD><EFBFBD><EFBFBD>0=1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE <EFBFBD><EFBFBD><EFBFBD> NULL ref <EFBFBD><EFBFBD><EFBFBD>0,<EFBFBD><EFBFBD><EFBFBD>01 <EFBFBD><EFBFBD><EFBFBD>0 5 const 1 100.00 Using index
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select `test`.`<EFBFBD><EFBFBD><EFBFBD>`.`<EFBFBD><EFBFBD><EFBFBD>0` AS `<EFBFBD><EFBFBD><EFBFBD>0` from `test`.`<EFBFBD><EFBFBD><EFBFBD>` where (`test`.`<EFBFBD><EFBFBD><EFBFBD>`.`<EFBFBD><EFBFBD><EFBFBD>0` = 1)
|
|
|
drop table <EFBFBD><EFBFBD><EFBFBD>;
|
|
|
set names latin1;
|
|
|
select 3 into @v1;
|
|
|
explain select 3 into @v1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 3 AS `3`
|
|
|
create table t1(f1 int, f2 int);
|
|
|
insert into t1 values (1,1);
|
|
|
create view v1 as select * from t1 where f1=1;
|
|
|
explain select * from v1 where f2=1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select '1' AS `f1`,'1' AS `f2` from dual where true
|
|
|
explain select * from t1 where 0;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2` from `test`.`t1` where false
|
|
|
explain select * from t1 where 1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select '1' AS `f1`,'1' AS `f2` from dual
|
|
|
explain select * from t1 having 0;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL Impossible HAVING
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2` from `test`.`t1` having false
|
|
|
explain select * from t1 having 1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select '1' AS `f1`,'1' AS `f2` from dual
|
|
|
drop view v1;
|
|
|
drop table t1;
|
|
|
CREATE TABLE t1(c INT);
|
|
|
INSERT INTO t1 VALUES (),();
|
|
|
CREATE TABLE t2 (b INT,
|
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
|
|
|
KEY(b),KEY(b),KEY(b),KEY(b),KEY(b));
|
|
|
Warnings:
|
|
|
Warning 1831 Duplicate index 'b_2' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_3' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_4' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_5' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_6' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_7' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_8' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_9' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_10' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_11' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_12' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_13' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_14' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_15' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_16' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_17' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_18' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_19' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_20' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_21' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_22' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_23' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_24' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_25' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_26' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_27' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_28' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_29' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_30' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_31' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_32' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_33' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_34' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_35' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_36' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_37' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_38' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_39' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
Warning 1831 Duplicate index 'b_40' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
|
|
|
INSERT INTO t2 VALUES (),(),();
|
|
|
EXPLAIN SELECT 1 FROM
|
|
|
(SELECT 1 FROM t2,t1 WHERE b < c GROUP BY 1 LIMIT 1) AS d2;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
X X X NULL X X X X X X NULL no matching row in const table
|
|
|
X X X NULL X X X X X X 100.00 NULL
|
|
|
X X X NULL X X X X X X 33.33 Range checked for each record (index map: 0xFFFFFFFFFF)
|
|
|
Warnings:
|
|
|
X X X
|
|
|
DROP TABLE t2;
|
|
|
DROP TABLE t1;
|
|
|
CREATE TABLE t1(a INT);
|
|
|
CREATE TABLE t2(a INT);
|
|
|
INSERT INTO t1 VALUES (1),(2);
|
|
|
INSERT INTO t2 VALUES (1),(2);
|
|
|
EXPLAIN SELECT 1
|
|
|
FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 4 100.00 NULL
|
|
|
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
|
|
|
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop)
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from (/* select#2 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
|
|
|
EXPLAIN SELECT 1
|
|
|
FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 4 100.00 NULL
|
|
|
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
|
|
|
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop)
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from (/* select#2 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
|
|
|
prepare s1 from
|
|
|
'EXPLAIN SELECT 1
|
|
|
FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1';
|
|
|
execute s1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 4 100.00 NULL
|
|
|
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
|
|
|
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop)
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from (/* select#2 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
|
|
|
prepare s1 from
|
|
|
'EXPLAIN FORMAT=JSON SELECT 1
|
|
|
FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1';
|
|
|
execute s1;
|
|
|
EXPLAIN
|
|
|
{
|
|
|
"query_block": {
|
|
|
"select_id": 1,
|
|
|
"cost_info": {
|
|
|
"query_cost": "2.95"
|
|
|
},
|
|
|
"table": {
|
|
|
"table_name": "s1",
|
|
|
"access_type": "ALL",
|
|
|
"rows_examined_per_scan": 4,
|
|
|
"rows_produced_per_join": 4,
|
|
|
"filtered": "100.00",
|
|
|
"cost_info": {
|
|
|
"read_cost": "2.55",
|
|
|
"eval_cost": "0.40",
|
|
|
"prefix_cost": "2.95",
|
|
|
"data_read_per_join": "64"
|
|
|
},
|
|
|
"used_columns": [
|
|
|
"COUNT(DISTINCT t1.a)"
|
|
|
],
|
|
|
"materialized_from_subquery": {
|
|
|
"using_temporary_table": true,
|
|
|
"dependent": false,
|
|
|
"cacheable": true,
|
|
|
"query_block": {
|
|
|
"select_id": 2,
|
|
|
"cost_info": {
|
|
|
"query_cost": "5.60"
|
|
|
},
|
|
|
"grouping_operation": {
|
|
|
"using_temporary_table": true,
|
|
|
"using_filesort": true,
|
|
|
"cost_info": {
|
|
|
"sort_cost": "4.00"
|
|
|
},
|
|
|
"nested_loop": [
|
|
|
{
|
|
|
"table": {
|
|
|
"table_name": "t1",
|
|
|
"access_type": "ALL",
|
|
|
"rows_examined_per_scan": 2,
|
|
|
"rows_produced_per_join": 2,
|
|
|
"filtered": "100.00",
|
|
|
"cost_info": {
|
|
|
"read_cost": "0.50",
|
|
|
"eval_cost": "0.20",
|
|
|
"prefix_cost": "0.70",
|
|
|
"data_read_per_join": "16"
|
|
|
},
|
|
|
"used_columns": [
|
|
|
"a"
|
|
|
]
|
|
|
}
|
|
|
},
|
|
|
{
|
|
|
"table": {
|
|
|
"table_name": "t2",
|
|
|
"access_type": "ALL",
|
|
|
"rows_examined_per_scan": 2,
|
|
|
"rows_produced_per_join": 4,
|
|
|
"filtered": "100.00",
|
|
|
"using_join_buffer": "Block Nested Loop",
|
|
|
"cost_info": {
|
|
|
"read_cost": "0.50",
|
|
|
"eval_cost": "0.40",
|
|
|
"prefix_cost": "1.60",
|
|
|
"data_read_per_join": "32"
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
]
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from (/* select#2 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
|
|
|
prepare s1 from
|
|
|
'EXPLAIN SELECT 1
|
|
|
FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1';
|
|
|
execute s1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 4 100.00 NULL
|
|
|
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
|
|
|
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop)
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from (/* select#2 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
|
|
|
execute s1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 4 100.00 NULL
|
|
|
2 DERIVED t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
|
|
|
2 DERIVED t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop)
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from (/* select#2 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
|
|
|
DROP TABLE t1,t2;
|
|
|
CREATE TABLE t1 (a INT PRIMARY KEY);
|
|
|
EXPLAIN SELECT COUNT(a) FROM t1 USE KEY(a);
|
|
|
ERROR 42000: Key 'a' doesn't exist in table 't1'
|
|
|
DROP TABLE t1;
|
|
|
CREATE TABLE t1(a LONGTEXT);
|
|
|
INSERT INTO t1 VALUES (repeat('a',@@global.max_allowed_packet));
|
|
|
INSERT INTO t1 VALUES (repeat('b',@@global.max_allowed_packet));
|
|
|
EXPLAIN SELECT DISTINCT 1 FROM t1,
|
|
|
(SELECT a AS away FROM t1 GROUP BY a WITH ROLLUP) as d1
|
|
|
WHERE t1.a = d1.a;
|
|
|
ERROR 42S22: Unknown column 'd1.a' in 'where clause'
|
|
|
EXPLAIN SELECT DISTINCT 1 FROM t1,
|
|
|
(SELECT DISTINCTROW a AS away FROM t1 GROUP BY a WITH ROLLUP) as d1
|
|
|
WHERE t1.a = d1.a;
|
|
|
ERROR 42S22: Unknown column 'd1.a' in 'where clause'
|
|
|
DROP TABLE t1;
|
|
|
#
|
|
|
# Bug#48295:
|
|
|
# explain crash with subquery and ONLY_FULL_GROUP_BY sql_mode
|
|
|
#
|
|
|
CREATE TABLE t1 (f1 INT);
|
|
|
SELECT @@session.sql_mode INTO @old_sql_mode;
|
|
|
SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
|
|
|
EXPLAIN SELECT 1 FROM t1
|
|
|
WHERE f1 > ALL( SELECT t.f1 FROM t1,t1 AS t );
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
|
|
|
2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL NULL Not optimized, outer query is empty
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` where <not>((NULL <= <max>(/* select#2 */ select `test`.`t`.`f1` from `test`.`t1` join `test`.`t1` `t`)))
|
|
|
SET SESSION sql_mode=@old_sql_mode;
|
|
|
DROP TABLE t1;
|
|
|
End of 5.0 tests.
|
|
|
#
|
|
|
# Bug#37870: Usage of uninitialized value caused failed assertion.
|
|
|
#
|
|
|
set @opt_sw_save= @@optimizer_switch;
|
|
|
create table t1 (dt datetime not null, t time not null);
|
|
|
create table t2 (dt datetime not null);
|
|
|
insert into t1 values ('2001-01-01 1:1:1', '1:1:1'),
|
|
|
('2001-01-01 1:1:1', '1:1:1');
|
|
|
insert into t2 values ('2001-01-01 1:1:1'), ('2001-01-01 1:1:1');
|
|
|
flush tables;
|
|
|
EXPLAIN SELECT outr.dt FROM t1 AS outr WHERE outr.dt IN (SELECT innr.dt FROM t2 AS innr WHERE outr.dt IS NULL );
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY outr NULL ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
|
2 DEPENDENT SUBQUERY innr NULL ALL NULL NULL NULL NULL 2 50.00 Using where
|
|
|
Warnings:
|
|
|
Note 1276 Field or reference 'test.outr.dt' of SELECT #2 was resolved in SELECT #1
|
|
|
Note 1003 /* select#1 */ select `test`.`outr`.`dt` AS `dt` from `test`.`t1` `outr` where <in_optimizer>(`test`.`outr`.`dt`,<exists>(/* select#2 */ select 1 from `test`.`t2` `innr` where ((`test`.`outr`.`dt` = TIMESTAMP'0000-00-00 00:00:00') and (<cache>(`test`.`outr`.`dt`) = `test`.`innr`.`dt`))))
|
|
|
flush tables;
|
|
|
SELECT outr.dt FROM t1 AS outr WHERE outr.dt IN (SELECT innr.dt FROM t2 AS innr WHERE outr.dt IS NULL );
|
|
|
dt
|
|
|
flush tables;
|
|
|
EXPLAIN SELECT outr.dt FROM t1 AS outr WHERE outr.dt IN ( SELECT innr.dt FROM t2 AS innr WHERE outr.t < '2005-11-13 7:41:31' );
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY outr NULL ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
|
2 DEPENDENT SUBQUERY innr NULL ALL NULL NULL NULL NULL 2 50.00 Using where
|
|
|
Warnings:
|
|
|
Note 1276 Field or reference 'test.outr.t' of SELECT #2 was resolved in SELECT #1
|
|
|
Note 1292 Incorrect time value: '2005-11-13 7:41:31' for column 't' at row 1
|
|
|
Note 1003 /* select#1 */ select `test`.`outr`.`dt` AS `dt` from `test`.`t1` `outr` where <in_optimizer>(`test`.`outr`.`dt`,<exists>(/* select#2 */ select 1 from `test`.`t2` `innr` where ((`test`.`outr`.`t` < TIME'07:41:31') and (<cache>(`test`.`outr`.`dt`) = `test`.`innr`.`dt`))))
|
|
|
flush tables;
|
|
|
SELECT outr.dt FROM t1 AS outr WHERE outr.dt IN ( SELECT innr.dt FROM t2 AS innr WHERE outr.t < '2005-11-13 7:41:31' );
|
|
|
dt
|
|
|
2001-01-01 01:01:01
|
|
|
2001-01-01 01:01:01
|
|
|
Warnings:
|
|
|
Note 1292 Incorrect time value: '2005-11-13 7:41:31' for column 't' at row 1
|
|
|
drop tables t1, t2;
|
|
|
set optimizer_switch= @opt_sw_save;
|
|
|
#
|
|
|
# Bug#47669: Query showed by EXPLAIN gives different result from original query
|
|
|
#
|
|
|
CREATE TABLE t1 (c int);
|
|
|
INSERT INTO t1 VALUES (NULL);
|
|
|
CREATE TABLE t2 (d int);
|
|
|
INSERT INTO t2 VALUES (NULL), (0);
|
|
|
EXPLAIN SELECT (SELECT 1 FROM t2 WHERE d = c) FROM t1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
2 DEPENDENT SUBQUERY t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where
|
|
|
Warnings:
|
|
|
Note 1276 Field or reference 'test.t1.c' of SELECT #2 was resolved in SELECT #1
|
|
|
Note 1003 /* select#1 */ select (/* select#2 */ select 1 from `test`.`t2` where (`test`.`t2`.`d` = NULL)) AS `(SELECT 1 FROM t2 WHERE d = c)` from dual
|
|
|
DROP TABLE t1, t2;
|
|
|
#
|
|
|
# Bug#30302: Tables that were optimized away are printed in the
|
|
|
# EXPLAIN warning.
|
|
|
#
|
|
|
create table t1(f1 int);
|
|
|
create table t2(f2 int);
|
|
|
insert into t1 values(1);
|
|
|
insert into t2 values(1),(2);
|
|
|
explain select * from t1 where f1=1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select '1' AS `f1` from dual where true
|
|
|
explain select * from t1 join t2 on f1=f2 where f1=1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 50.00 Using where
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select '1' AS `f1`,`test`.`t2`.`f2` AS `f2` from `test`.`t2` where (`test`.`t2`.`f2` = 1)
|
|
|
drop table t1,t2;
|
|
|
#
|
|
|
# Bug #48419: another explain crash..
|
|
|
#
|
|
|
CREATE TABLE t1 (a INT);
|
|
|
CREATE TABLE t2 (b BLOB, KEY b(b(100)));
|
|
|
INSERT INTO t2 VALUES ('1'), ('2'), ('3');
|
|
|
FLUSH TABLES;
|
|
|
EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT 1 FROM t1 t JOIN t2 WHERE b <= 1 AND t.a);
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table
|
|
|
2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL NULL Not optimized, outer query is empty
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` where multiple equal((/* select#2 */ select 1 from `test`.`t1` `t` join `test`.`t2` where ((`test`.`t2`.`b` <= 1) and (0 <> `test`.`t`.`a`))), NULL)
|
|
|
DROP TABLE t1, t2;
|
|
|
#
|
|
|
# Bug #48573: difference of index selection between rpm binary and
|
|
|
# .tar.gz, windows vs linux..
|
|
|
#
|
|
|
CREATE TABLE t1(c1 INT, c2 INT, c4 INT, c5 INT, KEY(c2, c5), KEY(c2, c4, c5));
|
|
|
INSERT INTO t1 VALUES(4, 1, 1, 1);
|
|
|
INSERT INTO t1 VALUES(3, 1, 1, 1);
|
|
|
INSERT INTO t1 VALUES(2, 1, 1, 1);
|
|
|
INSERT INTO t1 VALUES(1, 1, 1, 1);
|
|
|
EXPLAIN SELECT c1 FROM t1 WHERE c2 = 1 AND c4 = 1 AND c5 = 1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL ref c2,c2_2 c2 10 const,const 3 25.00 Using where
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`c1` AS `c1` from `test`.`t1` where ((`test`.`t1`.`c5` = 1) and (`test`.`t1`.`c4` = 1) and (`test`.`t1`.`c2` = 1))
|
|
|
DROP TABLE t1;
|
|
|
#
|
|
|
# Bug#56814 Explain + subselect + fulltext crashes server
|
|
|
#
|
|
|
CREATE TABLE t1(f1 VARCHAR(6) NOT NULL,
|
|
|
FULLTEXT KEY(f1),UNIQUE(f1));
|
|
|
INSERT INTO t1 VALUES ('test');
|
|
|
EXPLAIN SELECT 1 FROM t1
|
|
|
WHERE 1 > ALL((SELECT 1 FROM t1 JOIN t1 a ON (MATCH(t1.f1) AGAINST (""))
|
|
|
WHERE t1.f1 GROUP BY t1.f1));
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
2 SUBQUERY a NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
2 SUBQUERY t1 NULL fulltext f1 f1 0 const 1 100.00 Using where
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from dual where true
|
|
|
PREPARE stmt FROM
|
|
|
'EXPLAIN SELECT 1 FROM t1
|
|
|
WHERE 1 > ALL((SELECT 1 FROM t1 RIGHT OUTER JOIN t1 a
|
|
|
ON (MATCH(t1.f1) AGAINST (""))
|
|
|
WHERE t1.f1 GROUP BY t1.f1))';
|
|
|
EXECUTE stmt;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
2 SUBQUERY a NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
2 SUBQUERY t1 NULL fulltext f1 f1 0 const 1 100.00 Using where
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from dual where true
|
|
|
EXECUTE stmt;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
2 SUBQUERY a NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
2 SUBQUERY t1 NULL fulltext f1 f1 0 const 1 100.00 Using where
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from dual where true
|
|
|
DEALLOCATE PREPARE stmt;
|
|
|
PREPARE stmt FROM
|
|
|
'EXPLAIN SELECT 1 FROM t1
|
|
|
WHERE 1 > ALL((SELECT 1 FROM t1 JOIN t1 a
|
|
|
ON (MATCH(t1.f1) AGAINST (""))
|
|
|
WHERE t1.f1 GROUP BY t1.f1))';
|
|
|
EXECUTE stmt;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
2 SUBQUERY a NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
2 SUBQUERY t1 NULL fulltext f1 f1 0 const 1 100.00 Using where
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from dual where true
|
|
|
EXECUTE stmt;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY t1 NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
2 SUBQUERY a NULL system NULL NULL NULL NULL 1 100.00 NULL
|
|
|
2 SUBQUERY t1 NULL fulltext f1 f1 0 const 1 100.00 Using where
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` from dual where true
|
|
|
DEALLOCATE PREPARE stmt;
|
|
|
DROP TABLE t1;
|
|
|
End of 5.1 tests.
|
|
|
#
|
|
|
# Bug#46860:
|
|
|
# Crash/segfault using EXPLAIN on query using UNION in subquery.
|
|
|
#
|
|
|
drop table if exists t1;
|
|
|
create table `t1` (`a` int);
|
|
|
explain select 1 from `t1`, `t1` as `t2`
|
|
|
where `t1`.`a` > all ( (select `a` from `t1` ) union (select `a`) );
|
|
|
ERROR 23000: Column 'a' in field list is ambiguous
|
|
|
drop table t1;
|
|
|
#
|
|
|
# BUG#30597: Change EXPLAIN output to include extrema of
|
|
|
# UNION components
|
|
|
#
|
|
|
EXPLAIN
|
|
|
SELECT 1
|
|
|
UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
|
|
|
UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
|
|
|
UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
|
|
|
UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
|
|
|
UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
|
|
|
UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
|
|
|
;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
2 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
3 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
4 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
5 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
6 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
7 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
8 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
9 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
10 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
11 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
12 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
13 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
14 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
15 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
16 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
17 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
18 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
19 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
20 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
21 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
22 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
23 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
24 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
25 UNION NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select 1 AS `1` union all /* select#2 */ select 1 AS `1` union all /* select#3 */ select 1 AS `1` union all /* select#4 */ select 1 AS `1` union all /* select#5 */ select 1 AS `1` union all /* select#6 */ select 1 AS `1` union all /* select#7 */ select 1 AS `1` union all /* select#8 */ select 1 AS `1` union all /* select#9 */ select 1 AS `1` union all /* select#10 */ select 1 AS `1` union all /* select#11 */ select 1 AS `1` union all /* select#12 */ select 1 AS `1` union all /* select#13 */ select 1 AS `1` union all /* select#14 */ select 1 AS `1` union all /* select#15 */ select 1 AS `1` union all /* select#16 */ select 1 AS `1` union all /* select#17 */ select 1 AS `1` union all /* select#18 */ select 1 AS `1` union all /* select#19 */ select 1 AS `1` union all /* select#20 */ select 1 AS `1` union all /* select#21 */ select 1 AS `1` union all /* select#22 */ select 1 AS `1` union all /* select#23 */ select 1 AS `1` union all /* select#24 */ select 1 AS `1` union all /* select#25 */ select 1 AS `1`
|
|
|
# End BUG#30597
|
|
|
#
|
|
|
# BUG#53562: EXPLAIN statement should hint when
|
|
|
# index is not used due to type conversion
|
|
|
#
|
|
|
CREATE TABLE t1 (url char(1) PRIMARY KEY) charset latin1;
|
|
|
INSERT INTO t1 VALUES ('1'),('2'),('3'),('4'),('5');
|
|
|
|
|
|
# Normally, lookup access on primary key is done
|
|
|
EXPLAIN SELECT * FROM t1 WHERE url='1';
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL const PRIMARY PRIMARY 1 const 1 100.00 Using index
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select '1' AS `url` from `test`.`t1` where true
|
|
|
|
|
|
# Test that index can't be used for lookup due to type conversion
|
|
|
# (comparing char and int)
|
|
|
SELECT * FROM t1 WHERE url=1;
|
|
|
url
|
|
|
1
|
|
|
EXPLAIN SELECT * FROM t1 WHERE url=1;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL index PRIMARY PRIMARY 1 NULL 5 20.00 Using where; Using index
|
|
|
Warnings:
|
|
|
Warning 1739 Cannot use ref access on index 'PRIMARY' due to type or collation conversion on field 'url'
|
|
|
Warning 1739 Cannot use range access on index 'PRIMARY' due to type or collation conversion on field 'url'
|
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`url` AS `url` from `test`.`t1` where (`test`.`t1`.`url` = 1)
|
|
|
|
|
|
# Test that index can't be used for lookup due to collation mismatch
|
|
|
SELECT * FROM t1 WHERE url='1' collate latin1_german2_ci;
|
|
|
url
|
|
|
1
|
|
|
EXPLAIN SELECT * FROM t1 WHERE url='1' collate latin1_german2_ci;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL index PRIMARY PRIMARY 1 NULL 5 20.00 Using where; Using index
|
|
|
Warnings:
|
|
|
Warning 1739 Cannot use ref access on index 'PRIMARY' due to type or collation conversion on field 'url'
|
|
|
Warning 1739 Cannot use range access on index 'PRIMARY' due to type or collation conversion on field 'url'
|
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`url` AS `url` from `test`.`t1` where (`test`.`t1`.`url` = <cache>(('1' collate latin1_german2_ci)))
|
|
|
|
|
|
# Normally, range access on primary key is done
|
|
|
EXPLAIN SELECT * FROM t1 WHERE url>'3';
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL range PRIMARY PRIMARY 1 NULL 3 100.00 Using where; Using index
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`url` AS `url` from `test`.`t1` where (`test`.`t1`.`url` > '3')
|
|
|
|
|
|
# Test that range access on index can't be done due to type conversion
|
|
|
# (comparing char and int)
|
|
|
SELECT * FROM t1 WHERE url>3;
|
|
|
url
|
|
|
4
|
|
|
5
|
|
|
EXPLAIN SELECT * FROM t1 WHERE url>3;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL index PRIMARY PRIMARY 1 NULL 5 33.33 Using where; Using index
|
|
|
Warnings:
|
|
|
Warning 1739 Cannot use range access on index 'PRIMARY' due to type or collation conversion on field 'url'
|
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`url` AS `url` from `test`.`t1` where (`test`.`t1`.`url` > 3)
|
|
|
|
|
|
# Test that range access on index can't be done due to collation mismatch
|
|
|
SELECT * FROM t1 WHERE url>'3' collate latin1_german2_ci;
|
|
|
url
|
|
|
4
|
|
|
5
|
|
|
EXPLAIN SELECT * FROM t1 WHERE url>'3' collate latin1_german2_ci;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL index PRIMARY PRIMARY 1 NULL 5 33.33 Using where; Using index
|
|
|
Warnings:
|
|
|
Warning 1739 Cannot use range access on index 'PRIMARY' due to type or collation conversion on field 'url'
|
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`url` AS `url` from `test`.`t1` where (`test`.`t1`.`url` > <cache>(('3' collate latin1_german2_ci)))
|
|
|
|
|
|
DROP TABLE t1;
|
|
|
# End BUG#53562
|
|
|
#
|
|
|
# Bug#11829785 EXPLAIN CRASH WITH RIGHT OUTER JOIN, SUBQUERIES
|
|
|
#
|
|
|
CREATE TABLE t1(a INT);
|
|
|
INSERT INTO t1 VALUES (0), (0);
|
|
|
PREPARE s FROM
|
|
|
'EXPLAIN
|
|
|
SELECT SUBSTRING(1, (SELECT 1 FROM t1 a1 RIGHT OUTER JOIN t1 ON 0)) AS d
|
|
|
FROM t1 WHERE 0 > ANY (SELECT @a FROM t1)';
|
|
|
# After WL#4443 we don't evaluate subqueries during prepare, so no error.
|
|
|
EXECUTE s;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
|
3 UNCACHEABLE SUBQUERY t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
|
|
|
2 SUBQUERY t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
|
|
|
2 SUBQUERY a1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (Block Nested Loop)
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select substr(1,(/* select#2 */ select 1 from `test`.`t1` left join `test`.`t1` `a1` on(false) where true)) AS `d` from `test`.`t1` where <nop>(<in_optimizer>(0,<exists>(/* select#3 */ select (@`a`) from `test`.`t1` where true having <is_not_null_test>(<cache>((@`a`))))))
|
|
|
DEALLOCATE PREPARE s;
|
|
|
DROP TABLE t1;
|
|
|
#
|
|
|
# WL#4897: Add EXPLAIN INSERT/UPDATE/DELETE
|
|
|
#
|
|
|
# Coverage tests after code refactoring
|
|
|
#
|
|
|
CREATE TABLE t1 (a INT);
|
|
|
INSERT INTO t1 VALUES (1),(2),(3);
|
|
|
CREATE TABLE t2 (a INT);
|
|
|
INSERT INTO t2 VALUES (3),(4),(5);
|
|
|
# EXPLAIN must return 3 rows:
|
|
|
EXPLAIN SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 2,2;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
|
|
|
2 UNION t2 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
|
|
|
NULL UNION RESULT <union1,2> NULL ALL NULL NULL NULL NULL NULL NULL Using temporary
|
|
|
Warnings:
|
|
|
Warning 1287 SQL_CALC_FOUND_ROWS is deprecated and will be removed in a future release. Consider using two separate queries instead.
|
|
|
Note 1003 /* select#1 */ select sql_calc_found_rows `test`.`t1`.`a` AS `a` from `test`.`t1` union /* select#2 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` limit 2,2
|
|
|
EXPLAIN REPLACE INTO t1 VALUES (10);
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 REPLACE t1 NULL ALL NULL NULL NULL NULL NULL NULL NULL
|
|
|
Warnings:
|
|
|
Note 1003 replace into `test`.`t1` values (10)
|
|
|
EXPLAIN REPLACE INTO t1 SELECT * FROM t2;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 REPLACE t1 NULL ALL NULL NULL NULL NULL NULL NULL NULL
|
|
|
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
|
|
|
Warnings:
|
|
|
Note 1003 replace into `test`.`t1` /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2`
|
|
|
DROP TABLE t1, t2;
|
|
|
# End WL#4897
|
|
|
#
|
|
|
# Bug#21139522 PREPARED STATEMENT EXPLAIN DELETE .. WITH STRICT
|
|
|
# MODE VIOLATION FLATLINES
|
|
|
#
|
|
|
CREATE TABLE t1(a INT);
|
|
|
PREPARE s FROM "EXPLAIN DELETE FROM t1 WHERE a || 'a' LIMIT 1";
|
|
|
ERROR 22007: Truncated incorrect DOUBLE value: 'a'
|
|
|
DROP TABLE t1;
|
|
|
# End of test Bug#21139522
|
|
|
End of 6.0 tests.
|
|
|
#
|
|
|
# Bug #18899860: EXPLAIN .. SELECT .. FOR UPDATE TAKES LOCKS
|
|
|
#
|
|
|
CREATE TABLE t1(c1 INT PRIMARY KEY) ENGINE=INNODB;
|
|
|
INSERT INTO t1 VALUES (1),(2),(3);
|
|
|
START TRANSACTION;
|
|
|
EXPLAIN SELECT * FROM t1 WHERE c1 = 1 FOR UPDATE;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL const PRIMARY PRIMARY 4 const 1 100.00 Using index
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select '1' AS `c1` from `test`.`t1` where true
|
|
|
START TRANSACTION;
|
|
|
EXPLAIN SELECT * FROM t1 WHERE c1 = 1 FOR UPDATE;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 SIMPLE t1 NULL const PRIMARY PRIMARY 4 const 1 100.00 Using index
|
|
|
Warnings:
|
|
|
Note 1003 /* select#1 */ select '1' AS `c1` from `test`.`t1` where true
|
|
|
DROP TABLE t1;
|
|
|
# End of test for Bug#18899860
|
|
|
#
|
|
|
# Bug #23209903: ASSERTION: SELECT_LEX->LEAF_TABLE_COUNT == 0 ||
|
|
|
# THD->LEX->IS_QUERY_TABLES_LOCKED
|
|
|
#
|
|
|
CREATE TABLE t1 (a INT, b INT) ENGINE=INNODB PARTITION BY KEY (b) PARTITIONS 2;
|
|
|
CREATE TABLE t2 (c INT) ENGINE=INNODB;
|
|
|
|
|
|
# Test single-table update with subquery and empty outer query block
|
|
|
UPDATE t1 SET a=(SELECT c from t2) WHERE 0;
|
|
|
EXPLAIN UPDATE t1 SET a=(SELECT c from t2) WHERE 0;
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 UPDATE NULL NULL NULL NULL NULL NULL NULL NULL NULL No matching rows after partition pruning
|
|
|
Warnings:
|
|
|
Note 1003 update `test`.`t1` set `test`.`t1`.`a` = (/* select#2 */ select `test`.`t2`.`c` from `test`.`t2`) where false
|
|
|
|
|
|
# Test delete from single-table with subquery and empty outer query block
|
|
|
DELETE FROM t1 WHERE 0 AND a IN (SELECT c from t2);
|
|
|
EXPLAIN DELETE FROM t1 WHERE 0 AND a IN (SELECT c from t2);
|
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
|
1 DELETE NULL NULL NULL NULL NULL NULL NULL NULL NULL No matching rows after partition pruning
|
|
|
Warnings:
|
|
|
Note 1003 delete from `test`.`t1` where false
|
|
|
DROP TABLE t1, t2;
|
|
|
# End of test for Bug#23209903
|
|
|
|
