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mariadb/mysql-test/main/join_outer_reorder.result
Sergei Petrunia 5bcc115d77 MDEV-36055 Allow left join reordering 
(Based on a patch by Yuchen Pei)
When computing table dependencies in simplify_joins(), do not make
LEFT JOIN-ed table (or join nest) to be dependent on all preceding tables.

For queries in form

  t1
  LEFT JOIN t2 ON t2.col=t1.col
  LEFT JOIN t3 ON t3.col=t1.col

this allows the optimizer to construct join order of t1-t3-t2. Before
this patch, t1-t2-t3 was the only possible order.

Note that queries that use Oracle's Outer Join syntax (col1(+)=col2) are
converted into chained independent LEFT JOINs like the above.

The optimization is controlled by optimizer_switch='reorder_outer_joins=ON'

It is NOT enabled by default as it is known to expose problems with
join pruning. It is advised to set optimizer_prune_level=0 when setting
reorder_outer_joins=on.

Co-authored-by: Yuchen Pei <ycp@mariadb.com>
2026-01-28 14:11:44 +02:00

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set @join_outer_reorder_tmp=@@optimizer_switch;
set optimizer_switch='reorder_outer_joins=on';
create table t1 (a int);
insert into t1 select seq from seq_1_to_10000;
create table t2 (
a int,
b int,
index(a)
);
insert into t2
select
A.seq,
B.seq
from
seq_1_to_1000 A,
seq_1_to_10 B;
create table t3 (
a int,
b int,
index(a)
);
insert into t3
select
A.seq,
A.seq
from
seq_1_to_1000 A;
analyze table t1,t2,t3;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
test.t2 analyze status Engine-independent statistics collected
test.t2 analyze status Table is already up to date
test.t3 analyze status Engine-independent statistics collected
test.t3 analyze status Table is already up to date
set optimizer_trace=1;
explain
select *
from
t1
left join t3 on t3.a=t1.a
left join t2 on t2.a=t1.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10000
1 SIMPLE t3 ref a a 5 test.t1.a 1 Using where
1 SIMPLE t2 ref a a 5 test.t1.a 10 Using where
# This will show that t2 and t3 only depend on t1:
select json_pretty(json_extract(trace, '$**.table_dependencies')) as DEPS
from information_schema.optimizer_trace;
DEPS
[
[
{
"table": "t1",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits":
[]
},
{
"table": "t3",
"row_may_be_null": true,
"map_bit": 1,
"depends_on_map_bits":
["0"]
},
{
"table": "t2",
"row_may_be_null": true,
"map_bit": 2,
"depends_on_map_bits":
["0"]
}
]
]
# This will have same join order like previous EXPLAIN
# as the optimizer considers the queries identical
explain
select *
from
t1
left join t2 on t2.a=t1.a
left join t3 on t3.a=t1.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10000
1 SIMPLE t3 ref a a 5 test.t1.a 1 Using where
1 SIMPLE t2 ref a a 5 test.t1.a 10 Using where
# This will show that t2 and t3 only depend on t1:
select json_pretty(json_extract(trace, '$**.table_dependencies')) as DEPS
from information_schema.optimizer_trace;
DEPS
[
[
{
"table": "t1",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits":
[]
},
{
"table": "t2",
"row_may_be_null": true,
"map_bit": 1,
"depends_on_map_bits":
["0"]
},
{
"table": "t3",
"row_may_be_null": true,
"map_bit": 2,
"depends_on_map_bits":
["0"]
}
]
]
# Make t3's ON expression depend on t2:
explain
select *
from
t1
left join t2 on t2.a=t1.a
left join t3 on t3.a=t1.a and t3.b=t2.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10000
1 SIMPLE t2 ref a a 5 test.t1.a 10 Using where
1 SIMPLE t3 ref a a 5 test.t1.a 1 Using where
select json_pretty(json_extract(trace, '$**.table_dependencies')) as DEPS
from information_schema.optimizer_trace;
DEPS
[
[
{
"table": "t1",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits":
[]
},
{
"table": "t2",
"row_may_be_null": true,
"map_bit": 1,
"depends_on_map_bits":
["0"]
},
{
"table": "t3",
"row_may_be_null": true,
"map_bit": 2,
"depends_on_map_bits":
[
"0",
"1"
]
}
]
]
#
# Now, try a nested join:
#
create table t4 (
a int,
b int
);
insert into t4 values (1,1);
explain
select *
from
t1
left join (t2 join t4 as t4_2 on t2.b=t4_2.b) on t2.a=t1.a
left join (t3 join t4 as t4_3 on t3.b=t4_3.b) on t3.a=t1.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10000
1 SIMPLE t3 ref a a 5 test.t1.a 1 Using where
1 SIMPLE t4_3 ALL NULL NULL NULL NULL 1 Using where
1 SIMPLE t4_2 ALL NULL NULL NULL NULL 1 Using where
1 SIMPLE t2 ref a a 5 test.t1.a 10 Using where
select json_pretty(json_extract(trace, '$**.table_dependencies')) as DEPS
from information_schema.optimizer_trace;
DEPS
[
[
{
"table": "t1",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits":
[]
},
{
"table": "t2",
"row_may_be_null": true,
"map_bit": 1,
"depends_on_map_bits":
["0"]
},
{
"table": "t4_2",
"row_may_be_null": true,
"map_bit": 2,
"depends_on_map_bits":
["0"]
},
{
"table": "t3",
"row_may_be_null": true,
"map_bit": 3,
"depends_on_map_bits":
["0"]
},
{
"table": "t4_3",
"row_may_be_null": true,
"map_bit": 4,
"depends_on_map_bits":
["0"]
}
]
]
drop table t1,t2,t3,t4;
DROP TABLE IF EXISTS t0,t1,t2,t3,t4,t5,t6,t7,t8,t9;
SET @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch=ifnull(@optimizer_switch_for_join_nested_test,'outer_join_with_cache=off');
set join_cache_level=1;
CREATE TABLE t0 (a int, b int, c int);
CREATE TABLE t1 (a int, b int, c int);
CREATE TABLE t2 (a int, b int, c int);
CREATE TABLE t3 (a int, b int, c int);
CREATE TABLE t4 (a int, b int, c int);
CREATE TABLE t5 (a int, b int, c int);
CREATE TABLE t6 (a int, b int, c int);
CREATE TABLE t7 (a int, b int, c int);
CREATE TABLE t8 (a int, b int, c int);
CREATE TABLE t9 (a int, b int, c int);
INSERT INTO t0 VALUES (1,1,0), (1,2,0), (2,2,0);
INSERT INTO t1 VALUES (1,3,0), (2,2,0), (3,2,0);
INSERT INTO t2 VALUES (3,3,0), (4,2,0), (5,3,0);
INSERT INTO t3 VALUES (1,2,0), (2,2,0);
INSERT INTO t4 VALUES (3,2,0), (4,2,0);
INSERT INTO t5 VALUES (3,1,0), (2,2,0), (3,3,0);
INSERT INTO t6 VALUES (3,2,0), (6,2,0), (6,1,0);
INSERT INTO t7 VALUES (1,1,0), (2,2,0);
INSERT INTO t8 VALUES (0,2,0), (1,2,0);
INSERT INTO t9 VALUES (1,1,0), (1,2,0), (3,3,0);
SELECT t2.a,t2.b
FROM t2;
a b
3 3
4 2
5 3
SELECT t3.a,t3.b
FROM t3;
a b
1 2
2 2
SELECT t4.a,t4.b
FROM t4;
a b
3 2
4 2
SELECT t3.a,t3.b,t4.a,t4.b
FROM t3,t4;
a b a b
1 2 3 2
2 2 3 2
1 2 4 2
2 2 4 2
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t2.b=t4.b;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
4 2 2 2 3 2
4 2 2 2 4 2
5 3 NULL NULL NULL NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
5 3 NULL NULL NULL NULL
EXPLAIN EXTENDED
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t2.b=t4.b
WHERE t3.a=1 OR t3.c IS NULL;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t4`.`b` = `test`.`t2`.`b`) where `test`.`t3`.`a` = 1 or `test`.`t3`.`c` is null
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t2.b=t4.b
WHERE t3.a=1 OR t3.c IS NULL;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
5 3 NULL NULL NULL NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t2.b=t4.b
WHERE t3.a>1 OR t3.c IS NULL;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 2 2 3 2
4 2 2 2 4 2
5 3 NULL NULL NULL NULL
SELECT t5.a,t5.b
FROM t5;
a b
3 1
2 2
3 3
SELECT t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t3,t4,t5;
a b a b a b
1 2 3 2 3 1
2 2 3 2 3 1
1 2 4 2 3 1
2 2 4 2 3 1
1 2 3 2 2 2
2 2 3 2 2 2
1 2 4 2 2 2
2 2 4 2 2 2
1 2 3 2 3 3
2 2 3 2 3 3
1 2 4 2 3 3
2 2 4 2 3 3
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN
(t3, t4, t5)
ON t2.b=t4.b;
a b a b a b a b
3 3 NULL NULL NULL NULL NULL NULL
4 2 1 2 3 2 3 1
4 2 1 2 3 2 2 2
4 2 1 2 3 2 3 3
4 2 1 2 4 2 3 1
4 2 1 2 4 2 2 2
4 2 1 2 4 2 3 3
4 2 2 2 3 2 3 1
4 2 2 2 3 2 2 2
4 2 2 2 3 2 3 3
4 2 2 2 4 2 3 1
4 2 2 2 4 2 2 2
4 2 2 2 4 2 3 3
5 3 NULL NULL NULL NULL NULL NULL
EXPLAIN EXTENDED
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN
(t3, t4, t5)
ON t2.b=t4.b
WHERE t3.a>1 OR t3.c IS NULL;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on(`test`.`t4`.`b` = `test`.`t2`.`b`) where `test`.`t3`.`a` > 1 or `test`.`t3`.`c` is null
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN
(t3, t4, t5)
ON t2.b=t4.b
WHERE t3.a>1 OR t3.c IS NULL;
a b a b a b a b
3 3 NULL NULL NULL NULL NULL NULL
4 2 2 2 3 2 3 1
4 2 2 2 3 2 2 2
4 2 2 2 3 2 3 3
4 2 2 2 4 2 3 1
4 2 2 2 4 2 2 2
4 2 2 2 4 2 3 3
5 3 NULL NULL NULL NULL NULL NULL
EXPLAIN EXTENDED
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN
(t3, t4, t5)
ON t2.b=t4.b
WHERE (t3.a>1 OR t3.c IS NULL) AND
(t5.a<3 OR t5.c IS NULL);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on(`test`.`t4`.`b` = `test`.`t2`.`b`) where (`test`.`t3`.`a` > 1 or `test`.`t3`.`c` is null) and (`test`.`t5`.`a` < 3 or `test`.`t5`.`c` is null)
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN
(t3, t4, t5)
ON t2.b=t4.b
WHERE (t3.a>1 OR t3.c IS NULL) AND
(t5.a<3 OR t5.c IS NULL);
a b a b a b a b
3 3 NULL NULL NULL NULL NULL NULL
4 2 2 2 3 2 2 2
4 2 2 2 4 2 2 2
5 3 NULL NULL NULL NULL NULL NULL
SELECT t6.a,t6.b
FROM t6;
a b
3 2
6 2
6 1
SELECT t7.a,t7.b
FROM t7;
a b
1 1
2 2
SELECT t6.a,t6.b,t7.a,t7.b
FROM t6,t7;
a b a b
3 2 1 1
3 2 2 2
6 2 1 1
6 2 2 2
6 1 1 1
6 1 2 2
SELECT t8.a,t8.b
FROM t8;
a b
0 2
1 2
EXPLAIN EXTENDED
SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM (t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t7`.`b` and `test`.`t6`.`b` < 10) where 1
SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM (t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10;
a b a b a b
3 2 1 1 NULL NULL
3 2 2 2 0 2
3 2 2 2 1 2
6 2 1 1 NULL NULL
6 2 2 2 0 2
6 2 2 2 1 2
6 1 1 1 NULL NULL
6 1 2 2 0 2
6 1 2 2 1 2
SELECT t5.a,t5.b
FROM t5;
a b
3 1
2 2
3 3
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b;
a b a b a b a b
3 1 3 2 1 1 NULL NULL
3 1 6 2 1 1 NULL NULL
2 2 3 2 2 2 0 2
2 2 3 2 2 2 1 2
2 2 6 2 2 2 0 2
2 2 6 2 2 2 1 2
3 3 NULL NULL NULL NULL NULL NULL
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b AND
(t8.a < 1 OR t8.c IS NULL);
a b a b a b a b
3 1 3 2 1 1 NULL NULL
3 1 6 2 1 1 NULL NULL
2 2 3 2 2 2 0 2
2 2 6 2 2 2 0 2
3 3 NULL NULL NULL NULL NULL NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
5 3 NULL NULL NULL NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b;
a b a b a b a b a b a b a b
3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
4 2 1 2 3 2 2 2 3 2 2 2 0 2
4 2 1 2 3 2 2 2 3 2 2 2 1 2
4 2 1 2 3 2 2 2 6 2 2 2 0 2
4 2 1 2 3 2 2 2 6 2 2 2 1 2
4 2 1 2 4 2 2 2 3 2 2 2 0 2
4 2 1 2 4 2 2 2 3 2 2 2 1 2
4 2 1 2 4 2 2 2 6 2 2 2 0 2
4 2 1 2 4 2 2 2 6 2 2 2 1 2
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
WHERE t2.a > 3 AND
(t6.a < 6 OR t6.c IS NULL);
a b a b a b a b a b a b a b
4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
4 2 1 2 3 2 2 2 3 2 2 2 0 2
4 2 1 2 3 2 2 2 3 2 2 2 1 2
4 2 1 2 4 2 2 2 3 2 2 2 0 2
4 2 1 2 4 2 2 2 3 2 2 2 1 2
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
SELECT t1.a,t1.b
FROM t1;
a b
1 3
2 2
3 2
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2);
a b a b a b a b a b a b a b a b
1 3 3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
1 3 3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
1 3 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
1 3 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
1 3 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
1 3 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
1 3 3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
1 3 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
1 3 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
1 3 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
1 3 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
1 3 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
1 3 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
1 3 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
1 3 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
1 3 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
3 2 3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
3 2 3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
3 2 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
3 2 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
3 2 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
3 2 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
3 2 3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2
3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2
3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2
3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2
3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2
3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2
3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2
3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2
3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2)
WHERE (t2.a >= 4 OR t2.c IS NULL);
a b a b a b a b a b a b a b a b
1 3 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
1 3 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
1 3 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
1 3 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
1 3 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
1 3 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
1 3 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
1 3 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
1 3 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2
3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2
3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2
3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2
3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2
3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2
3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2
3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2
3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
SELECT t0.a,t0.b
FROM t0;
a b
1 1
1 2
2 2
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2)
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b`) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null)
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2)
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL);
a b a b a b a b a b a b a b a b a b
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
1 2 3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
1 2 3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2
1 2 3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2
1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2
1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
1 2 3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
1 2 3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2
1 2 3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2
1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2
1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b`) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t4`.`b` = `test`.`t3`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t9`.`b` = `test`.`t8`.`b` or `test`.`t8`.`c` is null)
SELECT t9.a,t9.b
FROM t9;
a b
1 1
1 2
3 3
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
a b a b a b a b a b a b a b a b a b a b
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 1 2
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 1 2
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 2
SELECT t1.a,t1.b
FROM t1;
a b
1 3
2 2
3 2
SELECT t2.a,t2.b
FROM t2;
a b
3 3
4 2
5 3
SELECT t3.a,t3.b
FROM t3;
a b
1 2
2 2
SELECT t2.a,t2.b,t3.a,t3.b
FROM t2
LEFT JOIN
t3
ON t2.b=t3.b;
a b a b
3 3 NULL NULL
4 2 1 2
4 2 2 2
5 3 NULL NULL
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b
FROM t1, t2
LEFT JOIN
t3
ON t2.b=t3.b
WHERE t1.a <= 2;
a b a b a b
1 3 3 3 NULL NULL
2 2 3 3 NULL NULL
1 3 4 2 1 2
1 3 4 2 2 2
2 2 4 2 1 2
2 2 4 2 2 2
1 3 5 3 NULL NULL
2 2 5 3 NULL NULL
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b
FROM t1, t3
RIGHT JOIN
t2
ON t2.b=t3.b
WHERE t1.a <= 2;
a b a b a b
1 3 3 3 NULL NULL
2 2 3 3 NULL NULL
1 3 4 2 1 2
1 3 4 2 2 2
2 2 4 2 1 2
2 2 4 2 2 2
1 3 5 3 NULL NULL
2 2 5 3 NULL NULL
SELECT t3.a,t3.b,t4.a,t4.b
FROM t3,t4;
a b a b
1 2 3 2
2 2 3 2
1 2 4 2
2 2 4 2
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
5 3 NULL NULL NULL NULL
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t1, t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b
WHERE t1.a <= 2;
a b a b a b a b
1 3 3 3 NULL NULL NULL NULL
2 2 3 3 NULL NULL NULL NULL
1 3 4 2 1 2 3 2
1 3 4 2 1 2 4 2
2 2 4 2 1 2 3 2
2 2 4 2 1 2 4 2
1 3 5 3 NULL NULL NULL NULL
2 2 5 3 NULL NULL NULL NULL
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t1, (t3, t4)
RIGHT JOIN
t2
ON t3.a=1 AND t2.b=t4.b
WHERE t1.a <= 2;
a b a b a b a b
1 3 3 3 NULL NULL NULL NULL
2 2 3 3 NULL NULL NULL NULL
1 3 4 2 1 2 3 2
1 3 4 2 1 2 4 2
2 2 4 2 1 2 3 2
2 2 4 2 1 2 4 2
1 3 5 3 NULL NULL NULL NULL
2 2 5 3 NULL NULL NULL NULL
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t1, (t3, t4)
RIGHT JOIN
t2
ON t3.a=1 AND t2.b=t4.b
WHERE t1.a <= 2;
a b a b a b a b
1 3 3 3 NULL NULL NULL NULL
2 2 3 3 NULL NULL NULL NULL
1 3 4 2 1 2 3 2
1 3 4 2 1 2 4 2
2 2 4 2 1 2 3 2
2 2 4 2 1 2 4 2
1 3 5 3 NULL NULL NULL NULL
2 2 5 3 NULL NULL NULL NULL
EXPLAIN EXTENDED
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t1, (t3, t4)
RIGHT JOIN
t2
ON t3.a=1 AND t2.b=t4.b
WHERE t1.a <= 2;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b`) where `test`.`t1`.`a` <= 2
INSERT INTO t2 VALUES (-1,9,0), (-3,10,0), (-2,8,0), (-4,11,0), (-5,15,0);
CREATE INDEX idx_b ON t2(b);
EXPLAIN EXTENDED
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM (t3,t4)
LEFT JOIN
(t1,t2)
ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b AND t2.a>0;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 1 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t3`.`b` and `test`.`t2`.`b` = `test`.`t3`.`b` and `test`.`t2`.`a` > 0 and `test`.`t3`.`b` is not null) where 1
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM (t3,t4)
LEFT JOIN
(t1,t2)
ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b AND t2.a>0;
a b a b a b
4 2 1 2 3 2
4 2 1 2 3 2
4 2 1 2 3 2
NULL NULL 2 2 3 2
4 2 1 2 4 2
4 2 1 2 4 2
4 2 1 2 4 2
NULL NULL 2 2 4 2
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b AND t2.a>0,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t4`.`b` = `test`.`t3`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t9`.`b` = `test`.`t8`.`b` or `test`.`t8`.`c` is null)
INSERT INTO t4 VALUES (-3,12,0), (-4,13,0), (-1,11,0), (-3,11,0), (-5,15,0);
INSERT INTO t5 VALUES (-3,11,0), (-2,12,0), (-3,13,0), (-4,12,0);
CREATE INDEX idx_b ON t4(b);
CREATE INDEX idx_b ON t5(b);
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b AND t2.a>0 AND t4.a>0,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b AND t5.a>0
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t5 ALL idx_b NULL NULL NULL 7 100.00 Using where
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 100.00 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t4`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`a` > 0)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t3`.`b` = `test`.`t4`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
INSERT INTO t8 VALUES (-3,12,0), (-1,14,0), (-5,15,0), (-1,11,0), (-4,13,0);
CREATE INDEX idx_b ON t8(b);
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b AND t2.a>0 AND t4.a>0,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10 AND t8.a>=0
)
ON t6.b >= 2 AND t5.b=t7.b AND t5.a>0
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t5 ALL idx_b NULL NULL NULL 7 100.00 Using where
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 1 100.00 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 100.00 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t4`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t8`.`a` >= 0 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`a` > 0)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t3`.`b` = `test`.`t4`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
INSERT INTO t1 VALUES (-1,133,0), (-2,12,0), (-3,11,0), (-5,15,0);
CREATE INDEX idx_b ON t1(b);
CREATE INDEX idx_a ON t0(a);
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2) AND t1.a>0,
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ref idx_a idx_a 5 const 2 100.00 Using where
1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 1 100.00
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t5 ALL idx_b NULL NULL NULL 7 100.00 Using where
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 1 100.00 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 100.00 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2 and `test`.`t1`.`a` > 0) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t3`.`b` = `test`.`t4`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2) AND t1.a>0,
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
a b a b a b a b a b a b a b a b a b a b
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 1 2
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 1 2
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 2
SELECT t2.a,t2.b
FROM t2;
a b
3 3
4 2
5 3
-1 9
-3 10
-2 8
-4 11
-5 15
SELECT t3.a,t3.b
FROM t3;
a b
1 2
2 2
SELECT t2.a,t2.b,t3.a,t3.b
FROM t2 LEFT JOIN t3 ON t2.b=t3.b
WHERE t2.a = 4 OR (t2.a > 4 AND t3.a IS NULL);
a b a b
4 2 1 2
4 2 2 2
5 3 NULL NULL
SELECT t2.a,t2.b,t3.a,t3.b
FROM t2 LEFT JOIN t3 ON t2.b=t3.b
WHERE t2.a = 4 OR (t2.a > 4 AND t3.a IS NULL);
a b a b
4 2 1 2
4 2 2 2
5 3 NULL NULL
ALTER TABLE t3
CHANGE COLUMN a a1 int,
CHANGE COLUMN c c1 int;
SELECT t2.a,t2.b,t3.a1,t3.b
FROM t2 LEFT JOIN t3 ON t2.b=t3.b
WHERE t2.a = 4 OR (t2.a > 4 AND t3.a1 IS NULL);
a b a1 b
4 2 1 2
4 2 2 2
5 3 NULL NULL
SELECT t2.a,t2.b,t3.a1,t3.b
FROM t2 NATURAL LEFT JOIN t3
WHERE t2.a = 4 OR (t2.a > 4 AND t3.a1 IS NULL);
a b a1 b
4 2 1 2
4 2 2 2
5 3 NULL NULL
DROP TABLE t0,t1,t2,t3,t4,t5,t6,t7,t8,t9;
CREATE TABLE t1 (a int);
CREATE TABLE t2 (a int);
CREATE TABLE t3 (a int);
INSERT INTO t1 VALUES (1);
INSERT INTO t2 VALUES (2);
INSERT INTO t3 VALUES (2);
INSERT INTO t1 VALUES (2);
SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t2.a=t3.a) ON t1.a=t3.a;
a a a
1 NULL NULL
2 2 2
SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON t2.a=t3.a ON t1.a=t3.a;
a a a
1 NULL NULL
2 2 2
DELETE FROM t1 WHERE a=2;
SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON t2.a=t3.a ON t1.a=t3.a;
a a a
1 NULL NULL
DELETE FROM t2;
SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON t2.a=t3.a ON t1.a=t3.a;
a a a
1 NULL NULL
DROP TABLE t1,t2,t3;
CREATE TABLE t1(a int, key (a));
CREATE TABLE t2(b int, key (b));
CREATE TABLE t3(c int, key (c));
INSERT INTO t1 VALUES (NULL), (0), (1), (2), (3), (4), (5), (6), (7), (8), (9),
(10), (11), (12), (13), (14), (15), (16), (17), (18), (19);
INSERT INTO t2 VALUES (NULL), (0), (1), (2), (3), (4), (5), (6), (7), (8), (9),
(10), (11), (12), (13), (14), (15), (16), (17), (18), (19);
INSERT INTO t3 VALUES (0), (1), (2), (3), (4), (5);
EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON c < 3 and b = c;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL a 5 NULL 21 Using index
1 SIMPLE t2 range b b 5 NULL 3 Using where; Using index
1 SIMPLE t3 ref c c 5 test.t2.b 1 Using index
EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL a 5 NULL 21 Using index
1 SIMPLE t2 range b b 5 NULL 3 Using where; Using index
1 SIMPLE t3 ref c c 5 test.t2.b 1 Using index
SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
a b c
NULL 0 0
NULL 1 1
NULL 2 2
0 0 0
0 1 1
0 2 2
1 0 0
1 1 1
1 2 2
2 0 0
2 1 1
2 2 2
3 0 0
3 1 1
3 2 2
4 0 0
4 1 1
4 2 2
5 0 0
5 1 1
5 2 2
6 0 0
6 1 1
6 2 2
7 0 0
7 1 1
7 2 2
8 0 0
8 1 1
8 2 2
9 0 0
9 1 1
9 2 2
10 0 0
10 1 1
10 2 2
11 0 0
11 1 1
11 2 2
12 0 0
12 1 1
12 2 2
13 0 0
13 1 1
13 2 2
14 0 0
14 1 1
14 2 2
15 0 0
15 1 1
15 2 2
16 0 0
16 1 1
16 2 2
17 0 0
17 1 1
17 2 2
18 0 0
18 1 1
18 2 2
19 0 0
19 1 1
19 2 2
DELETE FROM t3;
EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 const c NULL NULL NULL 0 Impossible ON condition
1 SIMPLE t2 const b NULL NULL NULL 0 Impossible ON condition
1 SIMPLE t1 index NULL a 5 NULL 21 Using index
SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
a b c
NULL NULL NULL
0 NULL NULL
1 NULL NULL
2 NULL NULL
3 NULL NULL
4 NULL NULL
5 NULL NULL
6 NULL NULL
7 NULL NULL
8 NULL NULL
9 NULL NULL
10 NULL NULL
11 NULL NULL
12 NULL NULL
13 NULL NULL
14 NULL NULL
15 NULL NULL
16 NULL NULL
17 NULL NULL
18 NULL NULL
19 NULL NULL
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (c11 int);
CREATE TABLE t2 (c21 int);
CREATE TABLE t3 (c31 int);
INSERT INTO t1 VALUES (4), (5);
SELECT * FROM t1 LEFT JOIN t2 ON c11=c21;
c11 c21
4 NULL
5 NULL
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON c11=c21;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 system NULL NULL NULL NULL 0 Const row not found
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21;
c11 c21 c31
4 NULL NULL
5 NULL NULL
EXPLAIN SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (goods int(12) NOT NULL, price varchar(128) NOT NULL);
INSERT INTO t1 VALUES (23, 2340), (26, 9900);
CREATE TABLE t2 (goods int(12), name varchar(50), shop char(2));
INSERT INTO t2 VALUES (23, 'as300', 'fr'), (26, 'as600', 'fr');
create table t3 (groupid int(12) NOT NULL, goodsid int(12) NOT NULL);
INSERT INTO t3 VALUES (3,23), (6,26);
CREATE TABLE t4 (groupid int(12));
INSERT INTO t4 VALUES (1), (2), (3), (4), (5), (6);
SELECT * FROM
(SELECT DISTINCT gl.groupid, gp.price
FROM t4 gl
LEFT JOIN
(t3 g INNER JOIN t2 p ON g.goodsid = p.goods
INNER JOIN t1 gp ON p.goods = gp.goods)
ON gl.groupid = g.groupid and p.shop = 'fr') t;
groupid price
1 NULL
2 NULL
3 2340
4 NULL
5 NULL
6 9900
CREATE VIEW v1 AS
SELECT g.groupid groupid, p.goods goods,
p.name name, p.shop shop,
gp.price price
FROM t3 g INNER JOIN t2 p ON g.goodsid = p.goods
INNER JOIN t1 gp on p.goods = gp.goods;
CREATE VIEW v2 AS
SELECT DISTINCT g.groupid, fr.price
FROM t4 g
LEFT JOIN
v1 fr on g.groupid = fr.groupid and fr.shop = 'fr';
SELECT * FROM v2;
groupid price
1 NULL
2 NULL
3 2340
4 NULL
5 NULL
6 9900
SELECT * FROM
(SELECT DISTINCT g.groupid, fr.price
FROM t4 g
LEFT JOIN
v1 fr on g.groupid = fr.groupid and fr.shop = 'fr') t;
groupid price
1 NULL
2 NULL
3 2340
4 NULL
5 NULL
6 9900
DROP VIEW v1,v2;
DROP TABLE t1,t2,t3,t4;
CREATE TABLE t1(a int);
CREATE TABLE t2(b int);
CREATE TABLE t3(c int, d int);
CREATE TABLE t4(d int);
CREATE TABLE t5(e int, f int);
CREATE TABLE t6(f int);
CREATE VIEW v1 AS
SELECT e FROM t5 JOIN t6 ON t5.e=t6.f;
CREATE VIEW v2 AS
SELECT e FROM t5 NATURAL JOIN t6;
SELECT t1.a FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c JOIN t4 USING(d);
a
SELECT t1.x FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c JOIN t4 USING(d);
ERROR 42S22: Unknown column 't1.x' in 'SELECT'
SELECT t1.a FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c NATURAL JOIN t4;
a
SELECT t1.x FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c NATURAL JOIN t4;
ERROR 42S22: Unknown column 't1.x' in 'SELECT'
SELECT v1.e FROM v1 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d);
e
SELECT v1.x FROM v1 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d);
ERROR 42S22: Unknown column 'v1.x' in 'SELECT'
SELECT v2.e FROM v2 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d);
e
SELECT v2.x FROM v2 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d);
ERROR 42S22: Unknown column 'v2.x' in 'SELECT'
DROP VIEW v1, v2;
DROP TABLE t1, t2, t3, t4, t5, t6;
create table t1 (id1 int(11) not null);
insert into t1 values (1),(2);
create table t2 (id2 int(11) not null);
insert into t2 values (1),(2),(3),(4);
create table t3 (id3 char(16) not null);
insert into t3 values ('100');
create table t4 (id2 int(11) not null, id3 char(16));
create table t5 (id1 int(11) not null, key (id1));
insert into t5 values (1),(2),(1);
create view v1 as
select t4.id3 from t4 join t2 on t4.id2 = t2.id2;
select t1.id1 from t1 inner join (t3 left join v1 on t3.id3 = v1.id3);
id1
1
2
drop view v1;
drop table t1, t2, t3, t4, t5;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3);
create table t1(a int);
insert into t1 select A.a + 10*(B.a) from t0 A, t0 B;
create table t2 (a int, b int);
insert into t2 values (1,1), (2,2), (3,3);
create table t3(a int, b int, filler char(200), key(a));
insert into t3 select a,a,'filler' from t1;
insert into t3 select a,a,'filler' from t1;
create table t4 like t3;
insert into t4 select * from t3;
insert into t4 select * from t3;
create table t5 like t4;
insert into t5 select * from t4;
insert into t5 select * from t4;
create table t6 like t5;
insert into t6 select * from t5;
insert into t6 select * from t5;
create table t7 like t6;
insert into t7 select * from t6;
insert into t7 select * from t6;
explain select * from t4 join
t2 left join (t3 join t5 on t5.a=t3.b) on t3.a=t2.b where t4.a<=>t3.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL X
1 SIMPLE t3 ref a a 5 test.t2.b X Using where
1 SIMPLE t5 ref a a 5 test.t3.b X
1 SIMPLE t4 ref a a 5 test.t3.b X Using index condition
explain select * from (t4 join t6 on t6.a=t4.b) right join t3 on t4.a=t3.b
join t2 left join (t5 join t7 on t7.a=t5.b) on t5.a=t2.b where t3.a<=>t2.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL X
1 SIMPLE t3 ref a a 5 test.t2.b X Using index condition
1 SIMPLE t4 ref a a 5 test.t3.b X Using where
1 SIMPLE t6 ref a a 5 test.t4.b X
1 SIMPLE t5 ref a a 5 test.t2.b X Using where
1 SIMPLE t7 ref a a 5 test.t5.b X
explain select * from t2 left join
(t3 left join (t4 join t6 on t6.a=t4.b) on t4.a=t3.b
join t5 on t5.a=t3.b) on t3.a=t2.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL X
1 SIMPLE t3 ref a a 5 test.t2.b X Using where
1 SIMPLE t4 ref a a 5 test.t3.b X Using where
1 SIMPLE t6 ref a a 5 test.t4.b X
1 SIMPLE t5 ref a a 5 test.t3.b X
drop table t0, t1, t2, t3, t4, t5, t6, t7;
create table t1 (a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a int, filler char(100), key(a));
insert into t2 select A.a + 10*B.a, '' from t1 A, t1 B;
create table t3 like t2;
insert into t3 select * from t2;
explain select * from t1 left join
(t2 left join t3 on (t2.a = t3.a))
on (t1.a = t2.a);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10
1 SIMPLE t2 ref a a 5 test.t1.a 1 Using where
1 SIMPLE t3 ref a a 5 test.t1.a 1 Using where
drop table t1, t2, t3;
CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, type varchar(10));
CREATE TABLE t2 (pid int NOT NULL PRIMARY KEY, type varchar(10));
CREATE TABLE t3 (cid int NOT NULL PRIMARY KEY,
id int NOT NULL,
pid int NOT NULL);
INSERT INTO t1 VALUES (1, 'A'), (3, 'C');
INSERT INTO t2 VALUES (1, 'A'), (3, 'C');
INSERT INTO t3 VALUES (1, 1, 1), (3, 3, 3);
SELECT * FROM t1 p LEFT JOIN (t3 JOIN t1)
ON (t1.id=t3.id AND t1.type='B' AND p.id=t3.id)
LEFT JOIN t2 ON (t3.pid=t2.pid)
WHERE p.id=1;
id type cid id pid id type pid type
1 A NULL NULL NULL NULL NULL NULL NULL
CREATE VIEW v1 AS
SELECT t3.* FROM t3 JOIN t1 ON t1.id=t3.id AND t1.type='B';
SELECT * FROM t1 p LEFT JOIN v1 ON p.id=v1.id
LEFT JOIN t2 ON v1.pid=t2.pid
WHERE p.id=1;
id type cid id pid pid type
1 A NULL NULL NULL NULL NULL
DROP VIEW v1;
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (id1 int PRIMARY KEY, id2 int);
CREATE TABLE t2 (id1 int PRIMARY KEY, id2 int);
CREATE TABLE t3 (id1 int PRIMARY KEY, id2 int);
CREATE TABLE t4 (id1 int PRIMARY KEY, id2 int);
CREATE TABLE t5 (id1 int PRIMARY KEY, id2 int);
SELECT t1.id1 AS id, t5.id1 AS ngroupbynsa
FROM t1 INNER JOIN t2 ON t2.id2 = t1.id1
LEFT OUTER JOIN
(t3 INNER JOIN t4 ON t4.id1 = t3.id2 INNER JOIN t5 ON t4.id2 = t5.id1)
ON t3.id2 IS NOT NULL
WHERE t1.id1=2;
id ngroupbynsa
PREPARE stmt FROM
"SELECT t1.id1 AS id, t5.id1 AS ngroupbynsa
FROM t1 INNER JOIN t2 ON t2.id2 = t1.id1
LEFT OUTER JOIN
(t3 INNER JOIN t4 ON t4.id1 = t3.id2 INNER JOIN t5 ON t4.id2 = t5.id1)
ON t3.id2 IS NOT NULL
WHERE t1.id1=2";
EXECUTE stmt;
id ngroupbynsa
EXECUTE stmt;
id ngroupbynsa
EXECUTE stmt;
id ngroupbynsa
EXECUTE stmt;
id ngroupbynsa
INSERT INTO t1 VALUES (1,1), (2,1), (3,2);
INSERT INTO t2 VALUES (2,1), (3,2), (4,3);
INSERT INTO t3 VALUES (1,1), (3,2), (2,NULL);
INSERT INTO t4 VALUES (1,1), (2,1), (3,3);
INSERT INTO t5 VALUES (1,1), (2,2), (3,3), (4,3);
EXECUTE stmt;
id ngroupbynsa
2 1
2 1
EXECUTE stmt;
id ngroupbynsa
2 1
2 1
EXECUTE stmt;
id ngroupbynsa
2 1
2 1
EXECUTE stmt;
id ngroupbynsa
2 1
2 1
SELECT t1.id1 AS id, t5.id1 AS ngroupbynsa
FROM t1 INNER JOIN t2 ON t2.id2 = t1.id1
LEFT OUTER JOIN
(t3 INNER JOIN t4 ON t4.id1 = t3.id2 INNER JOIN t5 ON t4.id2 = t5.id1)
ON t3.id2 IS NOT NULL
WHERE t1.id1=2;
id ngroupbynsa
2 1
2 1
DROP TABLE t1,t2,t3,t4,t5;
CREATE TABLE t1 (
id int NOT NULL PRIMARY KEY,
ct int DEFAULT NULL,
pc int DEFAULT NULL,
INDEX idx_ct (ct),
INDEX idx_pc (pc)
);
INSERT INTO t1 VALUES
(1,NULL,NULL),(2,NULL,NULL),(3,NULL,NULL),(4,NULL,NULL),(5,NULL,NULL);
CREATE TABLE t2 (
id int NOT NULL PRIMARY KEY,
sr int NOT NULL,
nm varchar(255) NOT NULL,
INDEX idx_sr (sr)
);
INSERT INTO t2 VALUES
(2441905,4308,'LesAbymes'),(2441906,4308,'Anse-Bertrand');
CREATE TABLE t3 (
id int NOT NULL PRIMARY KEY,
ct int NOT NULL,
ln int NOT NULL,
INDEX idx_ct (ct),
INDEX idx_ln (ln)
);
CREATE TABLE t4 (
id int NOT NULL PRIMARY KEY,
nm varchar(255) NOT NULL
);
INSERT INTO t4 VALUES (4308,'Guadeloupe'),(4309,'Martinique');
SELECT t1.*
FROM t1 LEFT JOIN
(t2 LEFT JOIN t3 ON t3.ct=t2.id AND t3.ln='5') ON t1.ct=t2.id
WHERE t1.id='5';
id ct pc
5 NULL NULL
SELECT t1.*, t4.nm
FROM t1 LEFT JOIN
(t2 LEFT JOIN t3 ON t3.ct=t2.id AND t3.ln='5') ON t1.ct=t2.id
LEFT JOIN t4 ON t2.sr=t4.id
WHERE t1.id='5';
id ct pc nm
5 NULL NULL NULL
DROP TABLE t1,t2,t3,t4;
CREATE TABLE t1 (a INT, b INT);
CREATE TABLE t2 (a INT);
CREATE TABLE t3 (a INT, c INT);
CREATE TABLE t4 (a INT, c INT);
CREATE TABLE t5 (a INT, c INT);
SELECT b FROM t1 JOIN (t2 LEFT JOIN t3 USING (a) LEFT JOIN t4 USING (a)
LEFT JOIN t5 USING (a)) USING (a);
b
SELECT c FROM t1 JOIN (t2 LEFT JOIN t3 USING (a) LEFT JOIN t4 USING (a)
LEFT JOIN t5 USING (a)) USING (a);
ERROR 23000: Column 'c' in SELECT is ambiguous
SELECT b FROM t1 JOIN (t2 JOIN t3 USING (a) JOIN t4 USING (a)
JOIN t5 USING (a)) USING (a);
b
SELECT c FROM t1 JOIN (t2 JOIN t3 USING (a) JOIN t4 USING (a)
JOIN t5 USING (a)) USING (a);
ERROR 23000: Column 'c' in SELECT is ambiguous
DROP TABLE t1,t2,t3,t4,t5;
CREATE TABLE t1 (a INT, b INT);
CREATE TABLE t2 (a INT, b INT);
CREATE TABLE t3 (a INT, b INT);
INSERT INTO t1 VALUES (1,1);
INSERT INTO t2 VALUES (1,1);
INSERT INTO t3 VALUES (1,1);
SELECT * FROM t1 JOIN (t2 JOIN t3 USING (b)) USING (a);
ERROR 23000: Column 'a' in FROM is ambiguous
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (
carrier char(2) default NULL,
id int NOT NULL auto_increment PRIMARY KEY
);
INSERT INTO t1 VALUES
('CO',235371754),('CO',235376554),('CO',235376884),('CO',235377874),
('CO',231060394),('CO',231059224),('CO',231059314),('CO',231060484),
('CO',231060274),('CO',231060124),('CO',231060244),('CO',231058594),
('CO',231058924),('CO',231058504),('CO',231059344),('CO',231060424),
('CO',231059554),('CO',231060304),('CO',231059644),('CO',231059464),
('CO',231059764),('CO',231058294),('CO',231058624),('CO',231058864),
('CO',231059374),('CO',231059584),('CO',231059734),('CO',231059014),
('CO',231059854),('CO',231059494),('CO',231059794),('CO',231058534),
('CO',231058324),('CO',231058684),('CO',231059524),('CO',231059974);
CREATE TABLE t2 (
scan_date date default NULL,
package_id int default NULL,
INDEX scan_date(scan_date),
INDEX package_id(package_id)
);
INSERT INTO t2 VALUES
('2008-12-29',231062944),('2008-12-29',231065764),('2008-12-29',231066124),
('2008-12-29',231060094),('2008-12-29',231061054),('2008-12-29',231065644),
('2008-12-29',231064384),('2008-12-29',231064444),('2008-12-29',231073774),
('2008-12-29',231058594),('2008-12-29',231059374),('2008-12-29',231066004),
('2008-12-29',231068494),('2008-12-29',231070174),('2008-12-29',231071884),
('2008-12-29',231063274),('2008-12-29',231063754),('2008-12-29',231064144),
('2008-12-29',231069424),('2008-12-29',231073714),('2008-12-29',231058414),
('2008-12-29',231060994),('2008-12-29',231069154),('2008-12-29',231068614),
('2008-12-29',231071464),('2008-12-29',231074014),('2008-12-29',231059614),
('2008-12-29',231059074),('2008-12-29',231059464),('2008-12-29',231069094),
('2008-12-29',231067294),('2008-12-29',231070144),('2008-12-29',231073804),
('2008-12-29',231072634),('2008-12-29',231058294),('2008-12-29',231065344),
('2008-12-29',231066094),('2008-12-29',231069034),('2008-12-29',231058594),
('2008-12-29',231059854),('2008-12-29',231059884),('2008-12-29',231059914),
('2008-12-29',231063664),('2008-12-29',231063814),('2008-12-29',231063904);
CREATE TABLE t3 (
package_id int default NULL,
INDEX package_id(package_id)
);
INSERT INTO t3 VALUES
(231058294),(231058324),(231058354),(231058384),(231058414),(231058444),
(231058474),(231058504),(231058534),(231058564),(231058594),(231058624),
(231058684),(231058744),(231058804),(231058864),(231058924),(231058954),
(231059014),(231059074),(231059104),(231059134),(231059164),(231059194),
(231059224),(231059254),(231059284),(231059314),(231059344),(231059374),
(231059404),(231059434),(231059464),(231059494),(231059524),(231059554),
(231059584),(231059614),(231059644),(231059674),(231059704),(231059734),
(231059764),(231059794),(231059824),(231059854),(231059884),(231059914),
(231059944),(231059974),(231060004),(231060034),(231060064),(231060094),
(231060124),(231060154),(231060184),(231060214),(231060244),(231060274),
(231060304),(231060334),(231060364),(231060394),(231060424),(231060454),
(231060484),(231060514),(231060544),(231060574),(231060604),(231060634),
(231060664),(231060694),(231060724),(231060754),(231060784),(231060814),
(231060844),(231060874),(231060904),(231060934),(231060964),(231060994),
(231061024),(231061054),(231061084),(231061144),(231061174),(231061204),
(231061234),(231061294),(231061354),(231061384),(231061414),(231061474),
(231061564),(231061594),(231061624),(231061684),(231061714),(231061774),
(231061804),(231061894),(231061984),(231062074),(231062134),(231062224),
(231062254),(231062314),(231062374),(231062434),(231062494),(231062554),
(231062584),(231062614),(231062644),(231062704),(231062734),(231062794),
(231062854),(231062884),(231062944),(231063004),(231063034),(231063064),
(231063124),(231063154),(231063184),(231063214),(231063274),(231063334),
(231063394),(231063424),(231063454),(231063514),(231063574),(231063664);
CREATE TABLE t4 (
carrier char(2) NOT NULL default '' PRIMARY KEY,
id int(11) default NULL,
INDEX id(id)
);
INSERT INTO t4 VALUES
('99',6),('SK',456),('UA',486),('AI',1081),('OS',1111),('VS',1510);
CREATE TABLE t5 (
carrier_id int default NULL,
INDEX carrier_id(carrier_id)
);
INSERT INTO t5 VALUES
(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),
(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),
(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),
(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),
(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),
(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(456),(456),(456),
(456),(456),(456),(456),(456),(456),(456),(456),(456),(456),(456),(456),
(456),(486),(1081),(1111),(1111),(1111),(1111),(1510);
SELECT COUNT(*)
FROM((t2 JOIN t1 ON t2.package_id = t1.id)
JOIN t3 ON t3.package_id = t1.id);
COUNT(*)
6
EXPLAIN
SELECT COUNT(*)
FROM ((t2 JOIN t1 ON t2.package_id = t1.id)
JOIN t3 ON t3.package_id = t1.id)
LEFT JOIN
(t5 JOIN t4 ON t5.carrier_id = t4.id)
ON t4.carrier = t1.carrier;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index package_id package_id 5 NULL 45 Using where; Using index
1 SIMPLE t3 ref package_id package_id 5 test.t2.package_id 1 Using index
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.package_id 1
1 SIMPLE t4 eq_ref PRIMARY,id PRIMARY 8 test.t1.carrier 1 Using where
1 SIMPLE t5 ref carrier_id carrier_id 5 test.t4.id 22 Using index
SELECT COUNT(*)
FROM ((t2 JOIN t1 ON t2.package_id = t1.id)
JOIN t3 ON t3.package_id = t1.id)
LEFT JOIN
(t5 JOIN t4 ON t5.carrier_id = t4.id)
ON t4.carrier = t1.carrier;
COUNT(*)
6
DROP TABLE t1,t2,t3,t4,t5;
CREATE TABLE t1 (
pk int NOT NULL AUTO_INCREMENT PRIMARY KEY,
a int DEFAULT NULL,
KEY idx(a)
);
CREATE TABLE t2 (
pk int NOT NULL AUTO_INCREMENT PRIMARY KEY,
a int DEFAULT NULL,
KEY idx(a)
);
CREATE TABLE t3 (
pk int NOT NULL AUTO_INCREMENT PRIMARY KEY,
a int DEFAULT NULL,
KEY idx(a)
);
INSERT INTO t1 VALUES
(1,2), (2,7), (3,5), (4,7), (5,5), (6,NULL), (7,NULL), (8,9);
INSERT INTO t2 VALUES
(1,NULL), (4,2), (5,2), (3,4), (2,8);
INSERT INTO t3 VALUES
(1,9), (2,2), (3,5), (4,2), (5,7), (6,0), (7,5);
SELECT t1.pk, t1.a, t2.pk, t2.a,t3.pk, t3.a
FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t3.a=t2.a) ON t2.a=t1.a;
pk a pk a pk a
1 2 4 2 2 2
1 2 4 2 4 2
1 2 5 2 2 2
1 2 5 2 4 2
2 7 NULL NULL NULL NULL
3 5 NULL NULL NULL NULL
4 7 NULL NULL NULL NULL
5 5 NULL NULL NULL NULL
6 NULL NULL NULL NULL NULL
7 NULL NULL NULL NULL NULL
8 9 NULL NULL NULL NULL
SELECT t1.pk, t1.a, t2.pk, t2.a,t3.pk, t3.a
FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t3.a=t2.a) ON t2.a=t1.a
WHERE t2.pk IS NULL;
pk a pk a pk a
2 7 NULL NULL NULL NULL
3 5 NULL NULL NULL NULL
4 7 NULL NULL NULL NULL
5 5 NULL NULL NULL NULL
6 NULL NULL NULL NULL NULL
7 NULL NULL NULL NULL NULL
8 9 NULL NULL NULL NULL
SELECT t1.pk, t1.a, t2.pk, t2.a,t3.pk, t3.a
FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t3.a=t2.a) ON t2.a=t1.a
WHERE t3.pk IS NULL;
pk a pk a pk a
2 7 NULL NULL NULL NULL
3 5 NULL NULL NULL NULL
4 7 NULL NULL NULL NULL
5 5 NULL NULL NULL NULL
6 NULL NULL NULL NULL NULL
7 NULL NULL NULL NULL NULL
8 9 NULL NULL NULL NULL
DROP TABLE t1, t2, t3;
CREATE TABLE t1 (a int NOT NULL );
INSERT INTO t1 VALUES (9), (9);
CREATE TABLE t2 (a int NOT NULL );
INSERT INTO t2 VALUES (9);
CREATE TABLE t3 (a int NOT NULL, b int);
INSERT INTO t3 VALUES (19,9);
CREATE TABLE t4 (b int) ;
SELECT * FROM t1 LEFT JOIN
((t2 LEFT JOIN t3 ON t2.a=t3.b) LEFT JOIN t4 ON t3.a=t4.b)
ON t1.a=t2.a;
a a a b b
9 9 19 9 NULL
9 9 19 9 NULL
SELECT * FROM t1 LEFT JOIN
((t2 LEFT JOIN t3 ON t2.a=t3.b) LEFT JOIN t4 ON t3.a=t4.b)
ON t1.a=t2.a
WHERE t3.a IS NULL;
a a a b b
EXPLAIN EXTENDED
SELECT * FROM t1 LEFT JOIN
((t2 LEFT JOIN t3 ON t2.a=t3.b) LEFT JOIN t4 ON t3.a=t4.b)
ON t1.a=t2.a
WHERE t3.a IS NULL;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 1 100.00 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 1 100.00 Using where; Not exists
1 SIMPLE t4 ALL NULL NULL NULL NULL 0 0.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`b` AS `b` from `test`.`t1` left join (`test`.`t2` left join `test`.`t3` on(`test`.`t3`.`b` = `test`.`t1`.`a`) left join `test`.`t4` on(`test`.`t4`.`b` = `test`.`t3`.`a`)) on(`test`.`t2`.`a` = `test`.`t1`.`a`) where `test`.`t3`.`a` is null
DROP TABLE t1,t2,t3,t4;
SET optimizer_switch=@save_optimizer_switch;
End of 5.0 tests
#
# MDEV-621: LP:693329 - Assertion `!is_interleave_error' failed on low optimizer_search_depth
#
set @tmp_mdev621= @@optimizer_search_depth;
SET SESSION optimizer_search_depth = 4;
CREATE TABLE t1 (f1 int,f2 int,f3 int,f4 int) ;
INSERT IGNORE INTO t1 VALUES (0,0,2,0),(NULL,0,2,0);
CREATE TABLE t2 (f1 int) ;
CREATE TABLE t3 (f3 int,PRIMARY KEY (f3)) ;
CREATE TABLE t4 (f5 int) ;
CREATE TABLE t5 (f2 int) ;
SELECT alias2.f4 FROM t1 AS alias1
LEFT JOIN t1 AS alias2
LEFT JOIN t2 AS alias3
LEFT JOIN t3 AS alias4 ON alias3.f1 = alias4.f3
ON alias2.f1
LEFT JOIN t4 AS alias5
JOIN t5 ON alias5.f5
ON alias2.f3 ON alias1.f2;
f4
NULL
NULL
DROP TABLE t1,t2,t3,t4,t5;
#
# MDEV-7992: Nested left joins + 'not exists' optimization
#
CREATE TABLE t1(
K1 INT PRIMARY KEY,
Name VARCHAR(15)
);
INSERT INTO t1 VALUES
(1,'T1Row1'), (2,'T1Row2');
CREATE TABLE t2(
K2 INT PRIMARY KEY,
K1r INT,
rowTimestamp DATETIME,
Event VARCHAR(15)
);
INSERT INTO t2 VALUES
(1, 1, '2015-04-13 10:42:11' ,'T1Row1Event1'),
(2, 1, '2015-04-13 10:42:12' ,'T1Row1Event2'),
(3, 1, '2015-04-13 10:42:12' ,'T1Row1Event3');
SELECT t1a.*, t2a.*,
t2i.K2 AS K2B, t2i.K1r AS K1rB,
t2i.rowTimestamp AS rowTimestampB, t2i.Event AS EventB
FROM
t1 t1a JOIN t2 t2a ON t2a.K1r = t1a.K1
LEFT JOIN
( t1 t1i LEFT JOIN t2 t2i ON t2i.K1r = t1i.K1)
ON (t1i.K1 = 1) AND
(((t2i.K1r = t1a.K1 AND t2i.rowTimestamp > t2a.rowTimestamp ) OR
(t2i.rowTimestamp = t2a.rowTimestamp AND t2i.K2 > t2a.K2))
OR (t2i.K2 IS NULL))
WHERE
t2a.K1r = 1 AND t2i.K2 IS NULL;
K1 Name K2 K1r rowTimestamp Event K2B K1rB rowTimestampB EventB
1 T1Row1 3 1 2015-04-13 10:42:12 T1Row1Event3 NULL NULL NULL NULL
EXPLAIN EXTENDED SELECT t1a.*, t2a.*,
t2i.K2 AS K2B, t2i.K1r AS K1rB,
t2i.rowTimestamp AS rowTimestampB, t2i.Event AS EventB
FROM
t1 t1a JOIN t2 t2a ON t2a.K1r = t1a.K1
LEFT JOIN
( t1 t1i LEFT JOIN t2 t2i ON t2i.K1r = t1i.K1)
ON (t1i.K1 = 1) AND
(((t2i.K1r = t1a.K1 AND t2i.rowTimestamp > t2a.rowTimestamp ) OR
(t2i.rowTimestamp = t2a.rowTimestamp AND t2i.K2 > t2a.K2))
OR (t2i.K2 IS NULL))
WHERE
t2a.K1r = 1 AND t2i.K2 IS NULL;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1a const PRIMARY PRIMARY 4 const 1 100.00
1 SIMPLE t2a ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1i const PRIMARY PRIMARY 4 const 1 100.00 Using index
1 SIMPLE t2i ALL NULL NULL NULL NULL 3 100.00 Using where; Not exists
Warnings:
Note 1003 select 1 AS `K1`,'T1Row1' AS `Name`,`test`.`t2a`.`K2` AS `K2`,`test`.`t2a`.`K1r` AS `K1r`,`test`.`t2a`.`rowTimestamp` AS `rowTimestamp`,`test`.`t2a`.`Event` AS `Event`,`test`.`t2i`.`K2` AS `K2B`,`test`.`t2i`.`K1r` AS `K1rB`,`test`.`t2i`.`rowTimestamp` AS `rowTimestampB`,`test`.`t2i`.`Event` AS `EventB` from `test`.`t1` `t1a` join `test`.`t2` `t2a` left join (`test`.`t1` `t1i` left join `test`.`t2` `t2i` on(`test`.`t2i`.`K1r` = 1)) on(`test`.`t1i`.`K1` = 1 and (`test`.`t2i`.`K1r` = 1 and `test`.`t2i`.`rowTimestamp` > `test`.`t2a`.`rowTimestamp` or `test`.`t2i`.`rowTimestamp` = `test`.`t2a`.`rowTimestamp` and `test`.`t2i`.`K2` > `test`.`t2a`.`K2` or `test`.`t2i`.`K2` is null)) where `test`.`t2a`.`K1r` = 1 and `test`.`t2i`.`K2` is null
CREATE VIEW v1 AS
SELECT t2i.*
FROM t1 as t1i LEFT JOIN t2 as t2i ON t2i.K1r = t1i.K1
WHERE t1i.K1 = 1 ;
SELECT
t1a.*, t2a.*, t2b.K2 as K2B, t2b.K1r as K1rB,
t2b.rowTimestamp as rowTimestampB, t2b.Event as EventB
FROM
t1 as t1a JOIN t2 as t2a ON t2a.K1r = t1a.K1
LEFT JOIN
v1 as t2b
ON ((t2b.K1r = t1a.K1 AND t2b.rowTimestamp > t2a.rowTimestamp) OR
(t2b.rowTimestamp = t2a.rowTimestamp AND t2b.K2 > t2a.K2))
OR (t2b.K2 IS NULL)
WHERE
t1a.K1 = 1 AND
t2b.K2 IS NULL;
K1 Name K2 K1r rowTimestamp Event K2B K1rB rowTimestampB EventB
1 T1Row1 3 1 2015-04-13 10:42:12 T1Row1Event3 NULL NULL NULL NULL
EXPLAIN EXTENDED SELECT
t1a.*, t2a.*, t2b.K2 as K2B, t2b.K1r as K1rB,
t2b.rowTimestamp as rowTimestampB, t2b.Event as EventB
FROM
t1 as t1a JOIN t2 as t2a ON t2a.K1r = t1a.K1
LEFT JOIN
v1 as t2b
ON ((t2b.K1r = t1a.K1 AND t2b.rowTimestamp > t2a.rowTimestamp) OR
(t2b.rowTimestamp = t2a.rowTimestamp AND t2b.K2 > t2a.K2))
OR (t2b.K2 IS NULL)
WHERE
t1a.K1 = 1 AND
t2b.K2 IS NULL;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1a const PRIMARY PRIMARY 4 const 1 100.00
1 SIMPLE t2a ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1i const PRIMARY PRIMARY 4 const 1 100.00 Using index
1 SIMPLE t2i ALL NULL NULL NULL NULL 3 100.00 Using where; Not exists
Warnings:
Note 1003 select 1 AS `K1`,'T1Row1' AS `Name`,`t2a`.`K2` AS `K2`,`t2a`.`K1r` AS `K1r`,`t2a`.`rowTimestamp` AS `rowTimestamp`,`t2a`.`Event` AS `Event`,`test`.`t2i`.`K2` AS `K2B`,`test`.`t2i`.`K1r` AS `K1rB`,`test`.`t2i`.`rowTimestamp` AS `rowTimestampB`,`test`.`t2i`.`Event` AS `EventB` from `test`.`t1` `t1a` join `test`.`t2` `t2a` left join (`test`.`t1` `t1i` left join `test`.`t2` `t2i` on(`test`.`t2i`.`K1r` = 1)) on(`test`.`t1i`.`K1` = 1 and (`test`.`t2i`.`K1r` = 1 and `test`.`t2i`.`rowTimestamp` > `t2a`.`rowTimestamp` or `test`.`t2i`.`rowTimestamp` = `t2a`.`rowTimestamp` and `test`.`t2i`.`K2` > `t2a`.`K2` or `test`.`t2i`.`K2` is null)) where `t2a`.`K1r` = 1 and `test`.`t2i`.`K2` is null
DROP VIEW v1;
DROP TABLE t1,t2;
set optimizer_search_depth= @tmp_mdev621;
#
# MDEV-19588: Nested left joins using optimized join cache
#
set optimizer_switch='optimize_join_buffer_size=on';
set @save_join_cache_level= @@join_cache_level;
set join_cache_level=2;
CREATE TABLE t1 (i1 int, c1 varchar(20), pk int) engine=myisam;
CREATE TABLE t2 (pk int, c1 varchar(20), i1 int) engine=myisam;
INSERT INTO t2 VALUES (7,'a',-912),(8,'a',5);
CREATE TABLE t3 (pk int, c1 varchar(20), i1 int) engine=myisam;
INSERT INTO t3 VALUES
(1,'a',-145),(2,'a',6),(3,'a',1),(7,'a',NULL),(8,'a',889),(9,'a',146),
(10,'a',177),(16,'a',-433),(17,'a',NULL),(18,'a',2),(19,'a',3),(20,'a',5),
(21,'a',-484),(22,'a',369),(23,'a',-192),(24,'a',-163),(25,'a',5),(26,'a',NULL);
SELECT t3.*
FROM t3 LEFT JOIN t1 LEFT JOIN t2 ON t1.i1 = t2.i1 ON t3.i1 = t1.i1
WHERE t2.pk < 13 OR t3.i1 IS NULL;
pk c1 i1
7 a NULL
17 a NULL
26 a NULL
explain extended SELECT t3.*
FROM t3 LEFT JOIN t1 LEFT JOIN t2 ON t1.i1 = t2.i1 ON t3.i1 = t1.i1
WHERE t2.pk < 13 OR t3.i1 IS NULL;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t3 ALL NULL NULL NULL NULL 18 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 0 0.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings:
Note 1003 select `test`.`t3`.`pk` AS `pk`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`i1` AS `i1` from `test`.`t3` left join (`test`.`t1` left join `test`.`t2` on(`test`.`t2`.`i1` = `test`.`t3`.`i1`)) on(`test`.`t1`.`i1` = `test`.`t3`.`i1`) where `test`.`t2`.`pk` < 13 or `test`.`t3`.`i1` is null
DROP TABLE t1,t2,t3;
set join_cache_level= @save_join_cache_level;
set optimizer_switch=@save_optimizer_switch;
#
# MDEV-27624: Nested left joins with not_exists optimization
# for most inner left join
#
set @save_join_cache_level= @@join_cache_level;
CREATE TABLE t1 (a INT NOT NULL, b INT, c INT);
INSERT INTO t1 VALUES (1,1,1), (1,2,1), (1,3,1);
CREATE TABLE t2(a INT NOT NULL);
INSERT INTO t2 VALUES (1), (2);
CREATE TABLE t3(a INT not null, b INT);
INSERT INTO t3 VALUES (1, 1), (2, 1), (3, 1);
set join_cache_level = 0;
EXPLAIN SELECT *
FROM t1
LEFT JOIN
( t2 LEFT JOIN t3 ON t2.a = t3.b )
ON t2.a = 1 AND (t3.b = t1.a AND t3.a > t1.b OR t3.a is NULL)
WHERE t1.c = 1 AND t3.a is NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where; Not exists
SELECT *
FROM t1
LEFT JOIN
( t2 LEFT JOIN t3 ON t2.a = t3.b )
ON t2.a = 1 AND (t3.b = t1.a AND t3.a > t1.b OR t3.a is NULL)
WHERE t1.c = 1 AND t3.a is NULL;
a b c a a b
1 3 1 NULL NULL NULL
set join_cache_level = 2;
EXPLAIN SELECT *
FROM t1
LEFT JOIN
( t2 LEFT JOIN t3 ON t2.a = t3.b )
ON t2.a = 1 AND (t3.b = t1.a AND t3.a > t1.b OR t3.a is NULL)
WHERE t1.c = 1 AND t3.a is NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where; Not exists; Using join buffer (incremental, BNL join)
SELECT *
FROM t1
LEFT JOIN
( t2 LEFT JOIN t3 ON t2.a = t3.b )
ON t2.a = 1 AND (t3.b = t1.a AND t3.a > t1.b OR t3.a is NULL)
WHERE t1.c = 1 AND t3.a is NULL;
a b c a a b
1 3 1 NULL NULL NULL
DROP TABLE t1, t2, t3;
set join_cache_level= @save_join_cache_level;
# end of 10.3 tests
#
# MDEV-32084: Assertion in best_extension_by_limited_search(), or crash elsewhere in release
#
CREATE TABLE t1 (i int);
INSERT INTO t1 values (1),(2);
SELECT 1 FROM t1 WHERE i IN
(SELECT 1 FROM t1 c
LEFT JOIN (t1 a LEFT JOIN t1 b ON t1.i = b.i) ON c.i = t1.i);
1
1
DROP TABLE t1;
#
# MDEV-35206: Assertion in JOIN::dbug_verify_sj_inner_tables
#
SET @save_optimizer_join_limit_pref_ratio= @@optimizer_join_limit_pref_ratio;
SET @save_optimizer_search_depth= @@optimizer_search_depth;
CREATE TABLE t1 (c1 VARCHAR(64) DEFAULT NULL, c2 VARCHAR(8) DEFAULT NULL);
INSERT INTO t1 (c1) values ('one');
INSERT INTO t1 (c2) values ('2');
SET optimizer_join_limit_pref_ratio=10;
SET optimizer_search_depth=1;
SELECT
c1
FROM
t1
WHERE
c2 IN (SELECT c2
FROM t1
WHERE c1 IN (SELECT c1
FROM t1
WHERE c1 IN (NULL)
)
)
ORDER BY c1 LIMIT 1;
c1
DROP TABLE t1;
#
# similar issue with join::cur_embedding_map
#
CREATE TABLE t10 (a int, b int, index(b));
INSERT INTO t10 SELECT seq, seq FROM seq_1_to_10;
CREATE TABLE t11(a int, b int);
CREATE TABLE t12(a int, b int, index(b));
INSERT INTO t11 select seq, seq FROM seq_1_to_20;
INSERT INTO t12 select seq, seq FROM seq_1_to_40;
CREATE TABLE t13(a int, b int);
CREATE TABLE t14(a int, b int, index(b));
INSERT INTO t13 select seq, seq FROM seq_1_to_20;
INSERT INTO t14 select seq, seq FROM seq_1_to_40;
ANALYZE TABLE t10, t11, t12;
Table Op Msg_type Msg_text
test.t10 analyze status Engine-independent statistics collected
test.t10 analyze status Table is already up to date
test.t11 analyze status Engine-independent statistics collected
test.t11 analyze status OK
test.t12 analyze status Engine-independent statistics collected
test.t12 analyze status Table is already up to date
EXPLAIN SELECT *
FROM
t10 LEFT JOIN
(
t11 JOIN t12 ON t11.b=t12.b
left join (t13 join t14 on t13.b=t14.b) on t13.a=t11.a
) ON t10.a=t11.a
ORDER BY t10.b LIMIT 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t10 ALL NULL NULL NULL NULL 10 Using temporary; Using filesort
1 SIMPLE t11 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t12 ref b b 5 test.t11.b 1
1 SIMPLE t13 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE t14 ref b b 5 test.t13.b 1
DROP TABLE t10, t11, t12, t13, t14;
SET optimizer_join_limit_pref_ratio= @save_optimizer_join_limit_pref_ratio;
SET optimizer_search_depth= @save_optimizer_search_depth;
# end of 10.11 tests
drop table if exists t0,t1,t2,t3,t4,t5;
drop view if exists v0,v1,v2,v3;
SET @org_optimizer_switch=@@optimizer_switch;
SET optimizer_switch=ifnull(@optimizer_switch_for_join_outer_test,'outer_join_with_cache=off');
set join_cache_level=1;
CREATE TABLE t1 (
grp int(11) default NULL,
a bigint(20) unsigned default NULL,
c char(10) NOT NULL default ''
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,1,'a'),(2,2,'b'),(2,3,'c'),(3,4,'E'),(3,5,'C'),(3,6,'D'),(NULL,NULL,'');
create table t2 (id int, a bigint unsigned not null, c char(10), d int, primary key (a));
insert into t2 values (1,1,"a",1),(3,4,"A",4),(3,5,"B",5),(3,6,"C",6),(4,7,"D",7);
select t1.*,t2.* from t1 JOIN t2 where t1.a=t2.a;
grp a c id a c d
1 1 a 1 1 a 1
3 4 E 3 4 A 4
3 5 C 3 5 B 5
3 6 D 3 6 C 6
select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) order by t1.grp,t1.a,t2.c;
grp a c id a c d
NULL NULL NULL NULL NULL NULL
1 1 a 1 1 a 1
2 2 b NULL NULL NULL NULL
2 3 c NULL NULL NULL NULL
3 4 E 3 4 A 4
3 5 C 3 5 B 5
3 6 D 3 6 C 6
select t1.*,t2.* from { oj t2 left outer join t1 on (t1.a=t2.a) };
grp a c id a c d
1 1 a 1 1 a 1
3 4 E 3 4 A 4
3 5 C 3 5 B 5
3 6 D 3 6 C 6
NULL NULL NULL 4 7 D 7
select t1.*,t2.* from t1 as t0,{ oj t2 left outer join t1 on (t1.a=t2.a) } WHERE t0.a=2;
grp a c id a c d
1 1 a 1 1 a 1
3 4 E 3 4 A 4
3 5 C 3 5 B 5
3 6 D 3 6 C 6
NULL NULL NULL 4 7 D 7
select t1.*,t2.* from t1 left join t2 using (a);
grp a c id a c d
1 1 a 1 1 a 1
2 2 b NULL NULL NULL NULL
2 3 c NULL NULL NULL NULL
3 4 E 3 4 A 4
3 5 C 3 5 B 5
3 6 D 3 6 C 6
NULL NULL NULL NULL NULL NULL
select t1.*,t2.* from t1 left join t2 using (a) where t1.a=t2.a;
grp a c id a c d
1 1 a 1 1 a 1
3 4 E 3 4 A 4
3 5 C 3 5 B 5
3 6 D 3 6 C 6
select t1.*,t2.* from t1 left join t2 using (a,c);
grp a c id a c d
1 1 a 1 1 a 1
2 2 b NULL NULL NULL NULL
2 3 c NULL NULL NULL NULL
3 4 E NULL NULL NULL NULL
3 5 C NULL NULL NULL NULL
3 6 D NULL NULL NULL NULL
NULL NULL NULL NULL NULL NULL
select t1.*,t2.* from t1 left join t2 using (c);
grp a c id a c d
1 1 a 1 1 a 1
1 1 a 3 4 A 4
2 2 b 3 5 B 5
2 3 c 3 6 C 6
3 4 E NULL NULL NULL NULL
3 5 C 3 6 C 6
3 6 D 4 7 D 7
NULL NULL NULL NULL NULL NULL
select t1.*,t2.* from t1 natural left outer join t2;
grp a c id a c d
1 1 a 1 1 a 1
2 2 b NULL NULL NULL NULL
2 3 c NULL NULL NULL NULL
3 4 E NULL NULL NULL NULL
3 5 C NULL NULL NULL NULL
3 6 D NULL NULL NULL NULL
NULL NULL NULL NULL NULL NULL
select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) where t2.id=3;
grp a c id a c d
3 4 E 3 4 A 4
3 5 C 3 5 B 5
3 6 D 3 6 C 6
select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) where t2.id is null;
grp a c id a c d
2 2 b NULL NULL NULL NULL
2 3 c NULL NULL NULL NULL
NULL NULL NULL NULL NULL NULL
explain select t1.*,t2.* from t1,t2 where t1.a=t2.a and isnull(t2.a)=1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
explain select t1.*,t2.* from t1 left join t2 on t1.a=t2.a where isnull(t2.a)=1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 8 test.t1.a 1 Using where
select t1.*,t2.*,t3.a from t1 left join t2 on (t1.a=t2.a) left join t1 as t3 on (t2.a=t3.a);
grp a c id a c d a
1 1 a 1 1 a 1 1
2 2 b NULL NULL NULL NULL NULL
2 3 c NULL NULL NULL NULL NULL
3 4 E 3 4 A 4 4
3 5 C 3 5 B 5 5
3 6 D 3 6 C 6 6
NULL NULL NULL NULL NULL NULL NULL
explain select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on (t1.a=t3.a);
ERROR 42S22: Unknown column 't3.a' in 'ON'
select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on (t1.a=t3.a);
ERROR 42S22: Unknown column 't3.a' in 'ON'
select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on (t2.a=t3.a);
ERROR 42S22: Unknown column 't3.a' in 'ON'
select t1.*,t2.* from t1 inner join t2 using (a);
grp a c id a c d
1 1 a 1 1 a 1
3 4 E 3 4 A 4
3 5 C 3 5 B 5
3 6 D 3 6 C 6
select t1.*,t2.* from t1 inner join t2 on (t1.a=t2.a);
grp a c id a c d
1 1 a 1 1 a 1
3 4 E 3 4 A 4
3 5 C 3 5 B 5
3 6 D 3 6 C 6
select t1.*,t2.* from t1 natural join t2;
grp a c id a c d
1 1 a 1 1 a 1
drop table t1,t2;
CREATE TABLE t1 (
usr_id INT unsigned NOT NULL,
uniq_id INT unsigned NOT NULL AUTO_INCREMENT,
start_num INT unsigned NOT NULL DEFAULT 1,
increment INT unsigned NOT NULL DEFAULT 1,
PRIMARY KEY (uniq_id),
INDEX usr_uniq_idx (usr_id, uniq_id),
INDEX uniq_usr_idx (uniq_id, usr_id)
);
CREATE TABLE t2 (
id INT unsigned NOT NULL DEFAULT 0,
usr2_id INT unsigned NOT NULL DEFAULT 0,
max INT unsigned NOT NULL DEFAULT 0,
c_amount INT unsigned NOT NULL DEFAULT 0,
d_max INT unsigned NOT NULL DEFAULT 0,
d_num INT unsigned NOT NULL DEFAULT 0,
orig_time INT unsigned NOT NULL DEFAULT 0,
c_time INT unsigned NOT NULL DEFAULT 0,
active ENUM ("no","yes") NOT NULL,
PRIMARY KEY (id,usr2_id),
INDEX id_idx (id),
INDEX usr2_idx (usr2_id)
);
INSERT INTO t1 VALUES (3,NULL,0,50),(3,NULL,0,200),(3,NULL,0,25),(3,NULL,0,84676),(3,NULL,0,235),(3,NULL,0,10),(3,NULL,0,3098),(3,NULL,0,2947),(3,NULL,0,8987),(3,NULL,0,8347654),(3,NULL,0,20398),(3,NULL,0,8976),(3,NULL,0,500),(3,NULL,0,198);
SELECT t1.usr_id,t1.uniq_id,t1.increment,
t2.usr2_id,t2.c_amount,t2.max
FROM t1
LEFT JOIN t2 ON t2.id = t1.uniq_id
WHERE t1.uniq_id = 4
ORDER BY t2.c_amount;
usr_id uniq_id increment usr2_id c_amount max
3 4 84676 NULL NULL NULL
SELECT t1.usr_id,t1.uniq_id,t1.increment,
t2.usr2_id,t2.c_amount,t2.max
FROM t2
RIGHT JOIN t1 ON t2.id = t1.uniq_id
WHERE t1.uniq_id = 4
ORDER BY t2.c_amount;
usr_id uniq_id increment usr2_id c_amount max
3 4 84676 NULL NULL NULL
INSERT INTO t2 VALUES (2,3,3000,6000,0,0,746584,837484,'yes');
INSERT INTO t2 VALUES (2,3,3000,6000,0,0,746584,837484,'yes');
ERROR 23000: Duplicate entry '2-3' for key 'PRIMARY'
INSERT INTO t2 VALUES (7,3,1000,2000,0,0,746294,937484,'yes');
SELECT t1.usr_id,t1.uniq_id,t1.increment,t2.usr2_id,t2.c_amount,t2.max FROM t1 LEFT JOIN t2 ON t2.id = t1.uniq_id WHERE t1.uniq_id = 4 ORDER BY t2.c_amount;
usr_id uniq_id increment usr2_id c_amount max
3 4 84676 NULL NULL NULL
SELECT t1.usr_id,t1.uniq_id,t1.increment,t2.usr2_id,t2.c_amount,t2.max FROM t1 LEFT JOIN t2 ON t2.id = t1.uniq_id WHERE t1.uniq_id = 4 GROUP BY t2.c_amount;
usr_id uniq_id increment usr2_id c_amount max
3 4 84676 NULL NULL NULL
SELECT t1.usr_id,t1.uniq_id,t1.increment,t2.usr2_id,t2.c_amount,t2.max FROM t1 LEFT JOIN t2 ON t2.id = t1.uniq_id WHERE t1.uniq_id = 4;
usr_id uniq_id increment usr2_id c_amount max
3 4 84676 NULL NULL NULL
drop table t1,t2;
CREATE TABLE t1 (
cod_asig int(11) DEFAULT '0' NOT NULL,
desc_larga_cat varchar(80) DEFAULT '' NOT NULL,
desc_larga_cas varchar(80) DEFAULT '' NOT NULL,
desc_corta_cat varchar(40) DEFAULT '' NOT NULL,
desc_corta_cas varchar(40) DEFAULT '' NOT NULL,
cred_total double(3,1) DEFAULT '0.0' NOT NULL,
pre_requisit int(11),
co_requisit int(11),
preco_requisit int(11),
PRIMARY KEY (cod_asig)
);
INSERT INTO t1 VALUES (10360,'asdfggfg','Introduccion a los Ordenadores I','asdfggfg','Introduccio Ordinadors I',6.0,NULL,NULL,NULL);
INSERT INTO t1 VALUES (10361,'Components i Circuits Electronics I','Componentes y Circuitos Electronicos I','Components i Circuits Electronics I','Comp. i Circ. Electr. I',6.0,NULL,NULL,NULL);
INSERT INTO t1 VALUES (10362,'Laboratori d`Ordinadors','Laboratorio de Ordenadores','Laboratori d`Ordinadors','Laboratori Ordinadors',4.5,NULL,NULL,NULL);
INSERT INTO t1 VALUES (10363,'Tecniques de Comunicacio Oral i Escrita','Tecnicas de Comunicacion Oral y Escrita','Tecniques de Comunicacio Oral i Escrita','Tec. Com. Oral i Escrita',4.5,NULL,NULL,NULL);
INSERT INTO t1 VALUES (11403,'Projecte Fi de Carrera','Proyecto Fin de Carrera','Projecte Fi de Carrera','PFC',9.0,NULL,NULL,NULL);
INSERT INTO t1 VALUES (11404,'+lgebra lineal','Algebra lineal','+lgebra lineal','+lgebra lineal',15.0,NULL,NULL,NULL);
INSERT INTO t1 VALUES (11405,'+lgebra lineal','Algebra lineal','+lgebra lineal','+lgebra lineal',18.0,NULL,NULL,NULL);
INSERT INTO t1 VALUES (11406,'Calcul Infinitesimal','Cßlculo Infinitesimal','Calcul Infinitesimal','Calcul Infinitesimal',15.0,NULL,NULL,NULL);
CREATE TABLE t2 (
idAssignatura int(11) DEFAULT '0' NOT NULL,
Grup int(11) DEFAULT '0' NOT NULL,
Places smallint(6) DEFAULT '0' NOT NULL,
PlacesOcupades int(11) DEFAULT '0',
PRIMARY KEY (idAssignatura,Grup)
);
INSERT INTO t2 VALUES (10360,12,333,0);
INSERT INTO t2 VALUES (10361,30,2,0);
INSERT INTO t2 VALUES (10361,40,3,0);
INSERT INTO t2 VALUES (10360,45,10,0);
INSERT INTO t2 VALUES (10362,10,12,0);
INSERT INTO t2 VALUES (10360,55,2,0);
INSERT INTO t2 VALUES (10360,70,0,0);
INSERT INTO t2 VALUES (10360,565656,0,0);
INSERT INTO t2 VALUES (10360,32767,7,0);
INSERT INTO t2 VALUES (10360,33,8,0);
INSERT INTO t2 VALUES (10360,7887,85,0);
INSERT INTO t2 VALUES (11405,88,8,0);
INSERT INTO t2 VALUES (10360,0,55,0);
INSERT INTO t2 VALUES (10360,99,0,0);
INSERT INTO t2 VALUES (11411,30,10,0);
INSERT INTO t2 VALUES (11404,0,0,0);
INSERT INTO t2 VALUES (10362,11,111,0);
INSERT INTO t2 VALUES (10363,33,333,0);
INSERT INTO t2 VALUES (11412,55,0,0);
INSERT INTO t2 VALUES (50003,66,6,0);
INSERT INTO t2 VALUES (11403,5,0,0);
INSERT INTO t2 VALUES (11406,11,11,0);
INSERT INTO t2 VALUES (11410,11410,131,0);
INSERT INTO t2 VALUES (11416,11416,32767,0);
INSERT INTO t2 VALUES (11409,0,0,0);
CREATE TABLE t3 (
id int(11) NOT NULL auto_increment,
dni_pasaporte char(16) DEFAULT '' NOT NULL,
idPla int(11) DEFAULT '0' NOT NULL,
cod_asig int(11) DEFAULT '0' NOT NULL,
any smallint(6) DEFAULT '0' NOT NULL,
quatrimestre smallint(6) DEFAULT '0' NOT NULL,
estat char(1) DEFAULT 'M' NOT NULL,
PRIMARY KEY (id),
UNIQUE dni_pasaporte (dni_pasaporte,idPla),
UNIQUE dni_pasaporte_2 (dni_pasaporte,idPla,cod_asig,any,quatrimestre)
);
INSERT INTO t3 VALUES (1,'11111111',1,10362,98,1,'M');
CREATE TABLE t4 (
id int(11) NOT NULL auto_increment,
papa int(11) DEFAULT '0' NOT NULL,
fill int(11) DEFAULT '0' NOT NULL,
idPla int(11) DEFAULT '0' NOT NULL,
PRIMARY KEY (id),
KEY papa (idPla,papa),
UNIQUE papa_2 (idPla,papa,fill)
);
INSERT INTO t4 VALUES (1,-1,10360,1);
INSERT INTO t4 VALUES (2,-1,10361,1);
INSERT INTO t4 VALUES (3,-1,10362,1);
SELECT DISTINCT fill,desc_larga_cat,cred_total,Grup,Places,PlacesOcupades FROM t4 LEFT JOIN t3 ON t3.cod_asig=fill AND estat='S' AND dni_pasaporte='11111111' AND t3.idPla=1 , t2,t1 WHERE fill=t1.cod_asig AND Places>PlacesOcupades AND fill=idAssignatura AND t4.idPla=1 AND papa=-1;
fill desc_larga_cat cred_total Grup Places PlacesOcupades
10360 asdfggfg 6.0 0 55 0
10360 asdfggfg 6.0 12 333 0
10360 asdfggfg 6.0 32767 7 0
10360 asdfggfg 6.0 33 8 0
10360 asdfggfg 6.0 45 10 0
10360 asdfggfg 6.0 55 2 0
10360 asdfggfg 6.0 7887 85 0
10361 Components i Circuits Electronics I 6.0 30 2 0
10361 Components i Circuits Electronics I 6.0 40 3 0
10362 Laboratori d`Ordinadors 4.5 10 12 0
10362 Laboratori d`Ordinadors 4.5 11 111 0
SELECT DISTINCT fill,t3.idPla FROM t4 LEFT JOIN t3 ON t3.cod_asig=t4.fill AND t3.estat='S' AND t3.dni_pasaporte='1234' AND t3.idPla=1 ;
fill idPla
10360 NULL
10361 NULL
10362 NULL
INSERT INTO t3 VALUES (3,'1234',1,10360,98,1,'S');
SELECT DISTINCT fill,t3.idPla FROM t4 LEFT JOIN t3 ON t3.cod_asig=t4.fill AND t3.estat='S' AND t3.dni_pasaporte='1234' AND t3.idPla=1 ;
fill idPla
10360 1
10361 NULL
10362 NULL
drop table t1,t2,t3,test.t4;
CREATE TABLE t1 (
id smallint(5) unsigned NOT NULL auto_increment,
name char(60) DEFAULT '' NOT NULL,
PRIMARY KEY (id)
);
INSERT INTO t1 VALUES (1,'Antonio Paz');
INSERT INTO t1 VALUES (2,'Lilliana Angelovska');
INSERT INTO t1 VALUES (3,'Thimble Smith');
CREATE TABLE t2 (
id smallint(5) unsigned NOT NULL auto_increment,
owner smallint(5) unsigned DEFAULT '0' NOT NULL,
name char(60),
PRIMARY KEY (id)
);
INSERT INTO t2 VALUES (1,1,'El Gato');
INSERT INTO t2 VALUES (2,1,'Perrito');
INSERT INTO t2 VALUES (3,3,'Happy');
select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner);
name name id
Antonio Paz El Gato 1
Antonio Paz Perrito 2
Lilliana Angelovska NULL NULL
Thimble Smith Happy 3
select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null;
name name id
Lilliana Angelovska NULL NULL
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Not exists
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.name is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
select count(*) from t1 left join t2 on (t1.id = t2.owner);
count(*)
4
select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner);
name name id
Antonio Paz El Gato 1
Antonio Paz Perrito 2
Lilliana Angelovska NULL NULL
Thimble Smith Happy 3
select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null;
name name id
Lilliana Angelovska NULL NULL
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Not exists
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.name is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
select count(*) from t2 right join t1 on (t1.id = t2.owner);
count(*)
4
select t1.name, t2.name, t2.id,t3.id from t2 right join t1 on (t1.id = t2.owner) left join t1 as t3 on t3.id=t2.owner;
name name id id
Antonio Paz El Gato 1 1
Antonio Paz Perrito 2 1
Lilliana Angelovska NULL NULL NULL
Thimble Smith Happy 3 3
select t1.name, t2.name, t2.id,t3.id from t1 right join t2 on (t1.id = t2.owner) right join t1 as t3 on t3.id=t2.owner;
name name id id
Antonio Paz El Gato 1 1
Antonio Paz Perrito 2 1
NULL NULL NULL 2
Thimble Smith Happy 3 3
select t1.name, t2.name, t2.id, t2.owner, t3.id from t1 left join t2 on (t1.id = t2.owner) right join t1 as t3 on t3.id=t2.owner;
name name id owner id
Antonio Paz El Gato 1 1 1
Antonio Paz Perrito 2 1 1
NULL NULL NULL NULL 2
Thimble Smith Happy 3 3 3
drop table t1,t2;
create table t1 (id int not null, str char(10), index(str));
insert into t1 values (1, null), (2, null), (3, "foo"), (4, "bar");
select * from t1 where str is not null order by id;
id str
3 foo
4 bar
select * from t1 where str is null;
id str
1 NULL
2 NULL
drop table t1;
CREATE TABLE t1 (
t1_id bigint(21) NOT NULL auto_increment,
PRIMARY KEY (t1_id)
);
CREATE TABLE t2 (
t2_id bigint(21) NOT NULL auto_increment,
PRIMARY KEY (t2_id)
);
CREATE TABLE t3 (
t3_id bigint(21) NOT NULL auto_increment,
PRIMARY KEY (t3_id)
);
CREATE TABLE t4 (
seq_0_id bigint(21) DEFAULT '0' NOT NULL,
seq_1_id bigint(21) DEFAULT '0' NOT NULL,
KEY seq_0_id (seq_0_id),
KEY seq_1_id (seq_1_id)
);
CREATE TABLE t5 (
seq_0_id bigint(21) DEFAULT '0' NOT NULL,
seq_1_id bigint(21) DEFAULT '0' NOT NULL,
KEY seq_1_id (seq_1_id),
KEY seq_0_id (seq_0_id)
);
insert into t1 values (1);
insert into t2 values (1);
insert into t3 values (1);
insert into t4 values (1,1);
insert into t5 values (1,1);
explain select * from t3 left join t4 on t4.seq_1_id = t2.t2_id left join t1 on t1.t1_id = t4.seq_0_id left join t5 on t5.seq_0_id = t1.t1_id left join t2 on t2.t2_id = t5.seq_1_id where t3.t3_id = 23;
ERROR 42S22: Unknown column 't2.t2_id' in 'ON'
drop table t1,t2,t3,t4,t5;
create table t1 (n int, m int, o int, key(n));
create table t2 (n int not null, m int, o int, primary key(n));
insert into t1 values (1, 2, 11), (1, 2, 7), (2, 2, 8), (1,2,9),(1,3,9);
insert into t2 values (1, 2, 3),(2, 2, 8), (4,3,9),(3,2,10);
select t1.*, t2.* from t1 left join t2 on t1.n = t2.n and
t1.m = t2.m where t1.n = 1;
n m o n m o
1 2 11 1 2 3
1 2 7 1 2 3
1 2 9 1 2 3
1 3 9 NULL NULL NULL
select t1.*, t2.* from t1 left join t2 on t1.n = t2.n and
t1.m = t2.m where t1.n = 1 order by t1.o;
n m o n m o
1 2 11 1 2 3
1 2 7 1 2 3
1 2 9 1 2 3
1 3 9 NULL NULL NULL
drop table t1,t2;
CREATE TABLE t1 (id1 INT NOT NULL PRIMARY KEY, dat1 CHAR(1), id2 INT);
INSERT INTO t1 VALUES (1,'a',1);
INSERT INTO t1 VALUES (2,'b',1);
INSERT INTO t1 VALUES (3,'c',2);
CREATE TABLE t2 (id2 INT NOT NULL PRIMARY KEY, dat2 CHAR(1));
INSERT INTO t2 VALUES (1,'x');
INSERT INTO t2 VALUES (2,'y');
INSERT INTO t2 VALUES (3,'z');
SELECT t2.id2 FROM t2 LEFT OUTER JOIN t1 ON t1.id2 = t2.id2 WHERE id1 IS NULL;
id2
3
SELECT t2.id2 FROM t2 NATURAL LEFT OUTER JOIN t1 WHERE id1 IS NULL;
id2
3
drop table t1,t2;
create table t1 ( color varchar(20), name varchar(20) );
insert into t1 values ( 'red', 'apple' );
insert into t1 values ( 'yellow', 'banana' );
insert into t1 values ( 'green', 'lime' );
insert into t1 values ( 'black', 'grape' );
insert into t1 values ( 'blue', 'blueberry' );
create table t2 ( count int, color varchar(20) );
insert into t2 values (10, 'green');
insert into t2 values (5, 'black');
insert into t2 values (15, 'white');
insert into t2 values (7, 'green');
select * from t1;
color name
red apple
yellow banana
green lime
black grape
blue blueberry
select * from t2;
count color
10 green
5 black
15 white
7 green
select * from t2 natural join t1;
color count name
green 10 lime
green 7 lime
black 5 grape
select t2.count, t1.name from t2 natural join t1;
count name
10 lime
7 lime
5 grape
select t2.count, t1.name from t2 inner join t1 using (color);
count name
10 lime
7 lime
5 grape
drop table t1;
drop table t2;
CREATE TABLE t1 (
pcode varchar(8) DEFAULT '' NOT NULL
);
INSERT INTO t1 VALUES ('kvw2000'),('kvw2001'),('kvw3000'),('kvw3001'),('kvw3002'),('kvw3500'),('kvw3501'),('kvw3502'),('kvw3800'),('kvw3801'),('kvw3802'),('kvw3900'),('kvw3901'),('kvw3902'),('kvw4000'),('kvw4001'),('kvw4002'),('kvw4200'),('kvw4500'),('kvw5000'),('kvw5001'),('kvw5500'),('kvw5510'),('kvw5600'),('kvw5601'),('kvw6000'),('klw1000'),('klw1020'),('klw1500'),('klw2000'),('klw2001'),('klw2002'),('kld2000'),('klw2500'),('kmw1000'),('kmw1500'),('kmw2000'),('kmw2001'),('kmw2100'),('kmw3000'),('kmw3200');
CREATE TABLE t2 (
pcode varchar(8) DEFAULT '' NOT NULL,
KEY pcode (pcode)
);
INSERT INTO t2 VALUES ('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw6000'),('kvw6000'),('kld2000');
SELECT t1.pcode, IF(ISNULL(t2.pcode), 0, COUNT(*)) AS count FROM t1
LEFT JOIN t2 ON t1.pcode = t2.pcode GROUP BY t1.pcode;
pcode count
kld2000 1
klw1000 0
klw1020 0
klw1500 0
klw2000 0
klw2001 0
klw2002 0
klw2500 0
kmw1000 0
kmw1500 0
kmw2000 0
kmw2001 0
kmw2100 0
kmw3000 0
kmw3200 0
kvw2000 26
kvw2001 0
kvw3000 36
kvw3001 0
kvw3002 0
kvw3500 26
kvw3501 0
kvw3502 0
kvw3800 0
kvw3801 0
kvw3802 0
kvw3900 0
kvw3901 0
kvw3902 0
kvw4000 0
kvw4001 0
kvw4002 0
kvw4200 0
kvw4500 0
kvw5000 0
kvw5001 0
kvw5500 0
kvw5510 0
kvw5600 0
kvw5601 0
kvw6000 2
SELECT SQL_BIG_RESULT t1.pcode, IF(ISNULL(t2.pcode), 0, COUNT(*)) AS count FROM t1 LEFT JOIN t2 ON t1.pcode = t2.pcode GROUP BY t1.pcode;
pcode count
kld2000 1
klw1000 0
klw1020 0
klw1500 0
klw2000 0
klw2001 0
klw2002 0
klw2500 0
kmw1000 0
kmw1500 0
kmw2000 0
kmw2001 0
kmw2100 0
kmw3000 0
kmw3200 0
kvw2000 26
kvw2001 0
kvw3000 36
kvw3001 0
kvw3002 0
kvw3500 26
kvw3501 0
kvw3502 0
kvw3800 0
kvw3801 0
kvw3802 0
kvw3900 0
kvw3901 0
kvw3902 0
kvw4000 0
kvw4001 0
kvw4002 0
kvw4200 0
kvw4500 0
kvw5000 0
kvw5001 0
kvw5500 0
kvw5510 0
kvw5600 0
kvw5601 0
kvw6000 2
drop table t1,t2;
CREATE TABLE t1 (
id int(11),
pid int(11),
rep_del tinyint(4),
KEY id (id),
KEY pid (pid)
);
INSERT INTO t1 VALUES (1,NULL,NULL);
INSERT INTO t1 VALUES (2,1,NULL);
select * from t1 LEFT JOIN t1 t2 ON (t1.id=t2.pid) AND t2.rep_del IS NULL;
id pid rep_del id pid rep_del
1 NULL NULL 2 1 NULL
2 1 NULL NULL NULL NULL
create index rep_del ON t1(rep_del);
select * from t1 LEFT JOIN t1 t2 ON (t1.id=t2.pid) AND t2.rep_del IS NULL;
id pid rep_del id pid rep_del
1 NULL NULL 2 1 NULL
2 1 NULL NULL NULL NULL
drop table t1;
CREATE TABLE t1 (
id int(11) DEFAULT '0' NOT NULL,
name tinytext DEFAULT '' NOT NULL,
UNIQUE id (id)
);
INSERT INTO t1 VALUES (1,'yes'),(2,'no');
CREATE TABLE t2 (
id int(11) DEFAULT '0' NOT NULL,
idx int(11) DEFAULT '0' NOT NULL,
UNIQUE id (id,idx)
);
INSERT INTO t2 VALUES (1,1);
explain SELECT * from t1 left join t2 on t1.id=t2.id where t2.id IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
1 SIMPLE t2 ref id id 4 test.t1.id 1 Using where; Using index; Not exists
SELECT * from t1 left join t2 on t1.id=t2.id where t2.id IS NULL;
id name id idx
2 no NULL NULL
drop table t1,t2;
create table t1 (bug_id mediumint, reporter mediumint);
create table t2 (bug_id mediumint, who mediumint, index(who));
insert into t2 values (1,1),(1,2);
insert into t1 values (1,1),(2,1);
SELECT * FROM t1 LEFT JOIN t2 ON (t1.bug_id = t2.bug_id AND t2.who = 2) WHERE (t1.reporter = 2 OR t2.who = 2);
bug_id reporter bug_id who
1 1 1 2
drop table t1,t2;
create table t1 (fooID smallint unsigned auto_increment, primary key (fooID));
create table t2 (fooID smallint unsigned not null, barID smallint unsigned not null, primary key (fooID,barID));
insert into t1 (fooID) values (10),(20),(30);
insert into t2 values (10,1),(20,2),(30,3);
explain select * from t2 left join t1 on t1.fooID = t2.fooID and t1.fooID = 30;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index NULL PRIMARY 4 NULL 3 Using index
1 SIMPLE t1 const PRIMARY PRIMARY 2 const 1 Using where; Using index
select * from t2 left join t1 on t1.fooID = t2.fooID and t1.fooID = 30;
fooID barID fooID
10 1 NULL
20 2 NULL
30 3 30
select * from t2 left join t1 ignore index(primary) on t1.fooID = t2.fooID and t1.fooID = 30;
fooID barID fooID
10 1 NULL
20 2 NULL
30 3 30
drop table t1,t2;
create table t1 (i int);
create table t2 (i int);
create table t3 (i int);
insert into t1 values(1),(2);
insert into t2 values(2),(3);
insert into t3 values(2),(4);
select * from t1 natural left join t2 natural left join t3;
i
1
2
select * from t1 natural left join t2 where (t2.i is not null)=0;
i
1
select * from t1 natural left join t2 where (t2.i is not null) is not null;
i
1
2
select * from t1 natural left join t2 where (i is not null)=0;
i
select * from t1 natural left join t2 where (i is not null) is not null;
i
1
2
drop table t1,t2,t3;
create table t1 (f1 integer,f2 integer,f3 integer);
create table t2 (f2 integer,f4 integer);
create table t3 (f3 integer,f5 integer);
select * from t1
left outer join t2 using (f2)
left outer join t3 using (f3);
f3 f2 f1 f4 f5
drop table t1,t2,t3;
create table t1 (a1 int, a2 int);
create table t2 (b1 int not null, b2 int);
create table t3 (c1 int, c2 int);
insert into t1 values (1,2), (2,2), (3,2);
insert into t2 values (1,3), (2,3);
insert into t3 values (2,4), (3,4);
select * from t1 left join t2 on b1 = a1 left join t3 on c1 = a1 and b1 is null;
a1 a2 b1 b2 c1 c2
1 2 1 3 NULL NULL
2 2 2 3 NULL NULL
3 2 NULL NULL 3 4
explain select * from t1 left join t2 on b1 = a1 left join t3 on c1 = a1 and b1 is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where
drop table t1, t2, t3;
create table t1 (
a int(11),
b char(10),
key (a)
);
insert into t1 (a) values (1),(2),(3),(4);
create table t2 (a int);
select * from t1 left join t2 on t1.a=t2.a where not (t2.a <=> t1.a);
a b a
1 NULL NULL
2 NULL NULL
3 NULL NULL
4 NULL NULL
select * from t1 left join t2 on t1.a=t2.a having not (t2.a <=> t1.a);
a b a
1 NULL NULL
2 NULL NULL
3 NULL NULL
4 NULL NULL
drop table t1,t2;
create table t1 (
match_id tinyint(3) unsigned not null auto_increment,
home tinyint(3) unsigned default '0',
unique key match_id (match_id),
key match_id_2 (match_id)
);
insert into t1 values("1", "2");
create table t2 (
player_id tinyint(3) unsigned default '0',
match_1_h tinyint(3) unsigned default '0',
key player_id (player_id)
);
insert into t2 values("1", "5");
insert into t2 values("2", "9");
insert into t2 values("3", "3");
insert into t2 values("4", "7");
insert into t2 values("5", "6");
insert into t2 values("6", "8");
insert into t2 values("7", "4");
insert into t2 values("8", "12");
insert into t2 values("9", "11");
insert into t2 values("10", "10");
explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
(t2 s left join t1 m on m.match_id = 1)
order by m.match_id desc;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE s ALL NULL NULL NULL NULL 10 Using temporary; Using filesort
1 SIMPLE m const match_id,match_id_2 match_id 1 const 1
explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
(t2 s left join t1 m on m.match_id = 1)
order by UUX desc;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE s ALL NULL NULL NULL NULL 10 Using temporary; Using filesort
1 SIMPLE m const match_id,match_id_2 match_id 1 const 1
select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
(t2 s left join t1 m on m.match_id = 1)
order by UUX desc;
player_id match_1_h * match_id home UUX
8 12 * 1 2 10
9 11 * 1 2 9
10 10 * 1 2 8
2 9 * 1 2 7
6 8 * 1 2 6
4 7 * 1 2 5
5 6 * 1 2 4
1 5 * 1 2 3
7 4 * 1 2 2
3 3 * 1 2 1
explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
t2 s straight_join t1 m where m.match_id = 1
order by UUX desc;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE s ALL NULL NULL NULL NULL 10 Using temporary; Using filesort
1 SIMPLE m const match_id,match_id_2 match_id 1 const 1
select s.*, '*', m.*, (s.match_1_h - m.home) UUX from
t2 s straight_join t1 m where m.match_id = 1
order by UUX desc;
player_id match_1_h * match_id home UUX
8 12 * 1 2 10
9 11 * 1 2 9
10 10 * 1 2 8
2 9 * 1 2 7
6 8 * 1 2 6
4 7 * 1 2 5
5 6 * 1 2 4
1 5 * 1 2 3
7 4 * 1 2 2
3 3 * 1 2 1
drop table t1, t2;
create table t1 (a int, b int, unique index idx (a, b));
create table t2 (a int, b int, c int, unique index idx (a, b));
insert into t1 values (1, 10), (1,11), (2,10), (2,11);
insert into t2 values (1,10,3);
select t1.a, t1.b, t2.c from t1 left join t2
on t1.a=t2.a and t1.b=t2.b and t2.c=3
where t1.a=1 and t2.c is null;
a b c
1 11 NULL
drop table t1, t2;
CREATE TABLE t1 (
ts_id bigint(20) default NULL,
inst_id tinyint(4) default NULL,
flag_name varchar(64) default NULL,
flag_value text,
UNIQUE KEY ts_id (ts_id,inst_id,flag_name)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
CREATE TABLE t2 (
ts_id bigint(20) default NULL,
inst_id tinyint(4) default NULL,
flag_name varchar(64) default NULL,
flag_value text,
UNIQUE KEY ts_id (ts_id,inst_id,flag_name)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
INSERT INTO t1 VALUES
(111056548820001, 0, 'flag1', NULL),
(111056548820001, 0, 'flag2', NULL),
(2, 0, 'other_flag', NULL);
INSERT INTO t2 VALUES
(111056548820001, 3, 'flag1', 'sss');
SELECT t1.flag_name,t2.flag_value
FROM t1 LEFT JOIN t2
ON (t1.ts_id = t2.ts_id AND t1.flag_name = t2.flag_name AND
t2.inst_id = 3)
WHERE t1.inst_id = 0 AND t1.ts_id=111056548820001 AND
t2.flag_value IS NULL;
flag_name flag_value
flag2 NULL
DROP TABLE t1,t2;
CREATE TABLE t1 (
id int(11) unsigned NOT NULL auto_increment,
text_id int(10) unsigned default NULL,
PRIMARY KEY (id)
);
INSERT INTO t1 VALUES("1", "0");
INSERT INTO t1 VALUES("2", "10");
CREATE TABLE t2 (
text_id char(3) NOT NULL default '',
language_id char(3) NOT NULL default '',
text_data text,
PRIMARY KEY (text_id,language_id)
);
INSERT INTO t2 VALUES("0", "EN", "0-EN");
INSERT INTO t2 VALUES("0", "SV", "0-SV");
INSERT INTO t2 VALUES("10", "EN", "10-EN");
INSERT INTO t2 VALUES("10", "SV", "10-SV");
SELECT t1.id, t1.text_id, t2.text_data
FROM t1 LEFT JOIN t2
ON t1.text_id = t2.text_id
AND t2.language_id = 'SV'
WHERE (t1.id LIKE '%' OR t2.text_data LIKE '%');
id text_id text_data
1 0 0-SV
2 10 10-SV
DROP TABLE t1, t2;
CREATE TABLE t0 (a0 int PRIMARY KEY);
CREATE TABLE t1 (a1 int PRIMARY KEY);
CREATE TABLE t2 (a2 int);
CREATE TABLE t3 (a3 int);
INSERT INTO t0 VALUES (1);
INSERT INTO t1 VALUES (1);
INSERT INTO t2 VALUES (1), (2);
INSERT INTO t3 VALUES (1), (2);
SELECT * FROM t1 LEFT JOIN t2 ON a1=0;
a1 a2
1 NULL
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON a1=0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
SELECT * FROM t1 LEFT JOIN (t2,t3) ON a1=0;
a1 a2 a3
1 NULL NULL
EXPLAIN SELECT * FROM t1 LEFT JOIN (t2,t3) ON a1=0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2
SELECT * FROM t0, t1 LEFT JOIN (t2,t3) ON a1=0 WHERE a0=a1;
a0 a1 a2 a3
1 1 NULL NULL
EXPLAIN SELECT * FROM t0, t1 LEFT JOIN (t2,t3) ON a1=0 WHERE a0=a1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t0 system PRIMARY NULL NULL NULL 1
1 SIMPLE t1 system PRIMARY NULL NULL NULL 1
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2
INSERT INTO t0 VALUES (0);
INSERT INTO t1 VALUES (0);
SELECT * FROM t0, t1 LEFT JOIN (t2,t3) ON a1=5 WHERE a0=a1 AND a0=1;
a0 a1 a2 a3
1 1 NULL NULL
EXPLAIN SELECT * FROM t0, t1 LEFT JOIN (t2,t3) ON a1=5 WHERE a0=a1 AND a0=1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t0 const PRIMARY PRIMARY 4 const 1 Using index
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2
drop table t1,t2;
create table t1 (a int, b int);
insert into t1 values (1,1),(2,2),(3,3);
create table t2 (a int, b int);
insert into t2 values (1,1), (2,2);
select * from t2 right join t1 on t2.a=t1.a;
a b a b
1 1 1 1
2 2 2 2
NULL NULL 3 3
select straight_join * from t2 right join t1 on t2.a=t1.a;
a b a b
1 1 1 1
2 2 2 2
NULL NULL 3 3
DROP TABLE t0,t1,t2,t3;
CREATE TABLE t1 (a int PRIMARY KEY, b int);
CREATE TABLE t2 (a int PRIMARY KEY, b int);
INSERT INTO t1 VALUES (1,1), (2,1), (3,1), (4,2);
INSERT INTO t2 VALUES (1,2), (2,2);
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a;
a b a b
1 1 1 2
2 1 2 2
3 1 NULL NULL
4 2 NULL NULL
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t1.b=1;
a b a b
1 1 1 2
2 1 2 2
3 1 NULL NULL
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
WHERE t1.b=1 XOR (NOT ISNULL(t2.a) AND t2.b=1);
a b a b
1 1 1 2
2 1 2 2
3 1 NULL NULL
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE not(0+(t1.a=30 and t2.b=1));
a b a b
1 1 1 2
2 1 2 2
3 1 NULL NULL
4 2 NULL NULL
DROP TABLE t1,t2;
set group_concat_max_len=5;
create table t1 (a int, b varchar(20));
create table t2 (a int, c varchar(20));
insert into t1 values (1,"aaaaaaaaaa"),(2,"bbbbbbbbbb");
insert into t2 values (1,"cccccccccc"),(2,"dddddddddd");
select group_concat(t1.b,t2.c) from t1 left join t2 using(a) group by t1.a;
group_concat(t1.b,t2.c)
aaaaa
bbbbb
Warnings:
Warning 1260 Row 1 was cut by group_concat()
Warning 1260 Row 2 was cut by group_concat()
select group_concat(t1.b,t2.c) from t1 inner join t2 using(a) group by t1.a;
group_concat(t1.b,t2.c)
aaaaa
bbbbb
Warnings:
Warning 1260 Row 1 was cut by group_concat()
Warning 1260 Row 2 was cut by group_concat()
select group_concat(t1.b,t2.c) from t1 left join t2 using(a) group by a;
group_concat(t1.b,t2.c)
aaaaa
bbbbb
Warnings:
Warning 1260 Row 1 was cut by group_concat()
Warning 1260 Row 2 was cut by group_concat()
select group_concat(t1.b,t2.c) from t1 inner join t2 using(a) group by a;
group_concat(t1.b,t2.c)
aaaaa
bbbbb
Warnings:
Warning 1260 Row 1 was cut by group_concat()
Warning 1260 Row 2 was cut by group_concat()
drop table t1, t2;
set group_concat_max_len=default;
create table t1 (gid smallint(5) unsigned not null, x int(11) not null, y int(11) not null, art int(11) not null, primary key (gid,x,y));
insert t1 values (1, -5, -8, 2), (1, 2, 2, 1), (1, 1, 1, 1);
create table t2 (gid smallint(5) unsigned not null, x int(11) not null, y int(11) not null, id int(11) not null, primary key (gid,id,x,y), key id (id));
insert t2 values (1, -5, -8, 1), (1, 1, 1, 1), (1, 2, 2, 1);
create table t3 ( set_id smallint(5) unsigned not null, id tinyint(4) unsigned not null, name char(12) not null, primary key (id,set_id));
insert t3 values (0, 1, 'a'), (1, 1, 'b'), (0, 2, 'c'), (1, 2, 'd'), (1, 3, 'e'), (1, 4, 'f'), (1, 5, 'g'), (1, 6, 'h');
explain select name from t1 left join t2 on t1.x = t2.x and t1.y = t2.y
left join t3 on t1.art = t3.id where t2.id =1 and t2.x = -5 and t2.y =-8
and t1.gid =1 and t2.gid =1 and t3.set_id =1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const PRIMARY PRIMARY 10 const,const,const 1
1 SIMPLE t2 const PRIMARY,id PRIMARY 14 const,const,const,const 1 Using index
1 SIMPLE t3 const PRIMARY PRIMARY 3 const,const 1
drop tables t1,t2,t3;
CREATE TABLE t1 (EMPNUM INT, GRP INT);
INSERT INTO t1 VALUES (0, 10);
INSERT INTO t1 VALUES (2, 30);
CREATE TABLE t2 (EMPNUM INT, NAME CHAR(5));
INSERT INTO t2 VALUES (0, 'KERI');
INSERT INTO t2 VALUES (9, 'BARRY');
CREATE VIEW v1 AS
SELECT COALESCE(t2.EMPNUM,t1.EMPNUM) AS EMPNUM, NAME, GRP
FROM t2 LEFT OUTER JOIN t1 ON t2.EMPNUM=t1.EMPNUM;
SELECT * FROM v1;
EMPNUM NAME GRP
0 KERI 10
9 BARRY NULL
SELECT * FROM v1 WHERE EMPNUM < 10;
EMPNUM NAME GRP
0 KERI 10
9 BARRY NULL
DROP VIEW v1;
DROP TABLE t1,t2;
CREATE TABLE t1 (c11 int);
CREATE TABLE t2 (c21 int);
INSERT INTO t1 VALUES (30), (40), (50);
INSERT INTO t2 VALUES (300), (400), (500);
SELECT * FROM t1 LEFT JOIN t2 ON (c11=c21 AND c21=30) WHERE c11=40;
c11 c21
40 NULL
DROP TABLE t1, t2;
CREATE TABLE t1 (a int PRIMARY KEY, b int);
CREATE TABLE t2 (a int PRIMARY KEY, b int);
INSERT INTO t1 VALUES (1,2), (2,1), (3,2), (4,3), (5,6), (6,5), (7,8), (8,7), (9,10);
INSERT INTO t2 VALUES (3,0), (4,1), (6,4), (7,5);
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t2.b <= t1.a AND t1.a <= t1.b;
a b a b
7 8 7 5
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a BETWEEN t2.b AND t1.b;
a b a b
7 8 7 5
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t1.a NOT BETWEEN t2.b AND t1.b);
a b a b
7 8 7 5
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t2.b > t1.a OR t1.a > t1.b;
a b a b
2 1 NULL NULL
3 2 3 0
4 3 4 1
6 5 6 4
8 7 NULL NULL
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a NOT BETWEEN t2.b AND t1.b;
a b a b
2 1 NULL NULL
3 2 3 0
4 3 4 1
6 5 6 4
8 7 NULL NULL
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t1.a BETWEEN t2.b AND t1.b);
a b a b
2 1 NULL NULL
3 2 3 0
4 3 4 1
6 5 6 4
8 7 NULL NULL
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a OR t2.b > t1.a OR t1.a > t1.b;
a b a b
2 1 NULL NULL
3 2 3 0
4 3 4 1
6 5 6 4
7 8 7 5
8 7 NULL NULL
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t1.a != t2.a AND t1.a BETWEEN t2.b AND t1.b);
a b a b
2 1 NULL NULL
3 2 3 0
4 3 4 1
6 5 6 4
7 8 7 5
8 7 NULL NULL
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a AND (t2.b > t1.a OR t1.a > t1.b);
a b a b
3 2 3 0
4 3 4 1
6 5 6 4
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t1.a != t2.a OR t1.a BETWEEN t2.b AND t1.b);
a b a b
3 2 3 0
4 3 4 1
6 5 6 4
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a OR t1.a = t2.b;
a b a b
3 2 3 0
4 3 4 1
6 5 6 4
7 8 7 5
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a IN(t2.a, t2.b);
a b a b
3 2 3 0
4 3 4 1
6 5 6 4
7 8 7 5
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t1.a NOT IN(t2.a, t2.b));
a b a b
3 2 3 0
4 3 4 1
6 5 6 4
7 8 7 5
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a != t1.b AND t1.a != t2.b;
a b a b
3 2 3 0
4 3 4 1
6 5 6 4
7 8 7 5
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a NOT IN(t1.b, t2.b);
a b a b
3 2 3 0
4 3 4 1
6 5 6 4
7 8 7 5
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t1.a IN(t1.b, t2.b));
a b a b
3 2 3 0
4 3 4 1
6 5 6 4
7 8 7 5
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t2.a != t2.b OR (t1.a != t2.a AND t1.a != t2.b);
a b a b
3 2 3 0
4 3 4 1
6 5 6 4
7 8 7 5
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t2.a = t2.b AND t1.a IN(t2.a, t2.b));
a b a b
3 2 3 0
4 3 4 1
6 5 6 4
7 8 7 5
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t2.a != t2.b AND t1.a != t1.b AND t1.a != t2.b;
a b a b
3 2 3 0
4 3 4 1
6 5 6 4
7 8 7 5
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE NOT(t2.a = t2.b OR t1.a IN(t1.b, t2.b));
a b a b
3 2 3 0
4 3 4 1
6 5 6 4
7 8 7 5
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a OR t1.a = t2.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a IN(t2.a, t2.b);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a > IF(t1.a = t2.b-2, t2.b, t2.b-1);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1
DROP TABLE t1,t2;
DROP VIEW IF EXISTS v1,v2;
DROP TABLE IF EXISTS t1,t2;
CREATE TABLE t1 (a int);
CREATE table t2 (b int);
INSERT INTO t1 VALUES (1), (2), (3), (4), (1), (1), (3);
INSERT INTO t2 VALUES (2), (3);
CREATE VIEW v1 AS SELECT a FROM t1 JOIN t2 ON t1.a=t2.b;
CREATE VIEW v2 AS SELECT b FROM t2 JOIN t1 ON t2.b=t1.a;
SELECT v1.a, v2. b
FROM v1 LEFT OUTER JOIN v2 ON (v1.a=v2.b) AND (v1.a >= 3)
GROUP BY v1.a;
a b
2 NULL
3 3
SELECT v1.a, v2. b
FROM { OJ v1 LEFT OUTER JOIN v2 ON (v1.a=v2.b) AND (v1.a >= 3) }
GROUP BY v1.a;
a b
2 NULL
3 3
DROP VIEW v1,v2;
DROP TABLE t1,t2;
CREATE TABLE t1 (a int);
CREATE TABLE t2 (b int);
INSERT INTO t1 VALUES (1), (2), (3), (4);
INSERT INTO t2 VALUES (2), (3);
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.b WHERE (1=1);
a b
1 NULL
2 2
3 3
4 NULL
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.b WHERE (1 OR 1);
a b
1 NULL
2 2
3 3
4 NULL
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.b WHERE (0 OR 1);
a b
1 NULL
2 2
3 3
4 NULL
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.b WHERE (1=1 OR 2=2);
a b
1 NULL
2 2
3 3
4 NULL
SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.b WHERE (1=1 OR 1=0);
a b
1 NULL
2 2
3 3
4 NULL
DROP TABLE t1,t2;
CREATE TABLE t1 (
f1 varchar(16) collate latin1_swedish_ci PRIMARY KEY,
f2 varchar(16) collate latin1_swedish_ci
);
CREATE TABLE t2 (
f1 varchar(16) collate latin1_swedish_ci PRIMARY KEY,
f3 varchar(16) collate latin1_swedish_ci
);
INSERT INTO t1 VALUES ('bla','blah');
INSERT INTO t2 VALUES ('bla','sheep');
SELECT * FROM t1 JOIN t2 USING(f1) WHERE f1='Bla';
f1 f2 f3
bla blah sheep
SELECT * FROM t1 LEFT JOIN t2 USING(f1) WHERE f1='bla';
f1 f2 f3
bla blah sheep
SELECT * FROM t1 LEFT JOIN t2 USING(f1) WHERE f1='Bla';
f1 f2 f3
bla blah sheep
DROP TABLE t1,t2;
CREATE TABLE t1 (id int PRIMARY KEY, a varchar(8));
CREATE TABLE t2 (id int NOT NULL, b int NOT NULL, INDEX idx(id));
INSERT INTO t1 VALUES
(1,'aaaaaaa'), (5,'eeeeeee'), (4,'ddddddd'), (2,'bbbbbbb'), (3,'ccccccc');
INSERT INTO t2 VALUES
(3,10), (2,20), (5,30), (3,20), (5,10), (3,40), (3,30), (2,10), (2,40);
EXPLAIN
SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
1 SIMPLE t2 ref idx idx 4 test.t1.id 1 Using where; Not exists
flush status;
SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL;
id a
1 aaaaaaa
4 ddddddd
show status like 'Handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 5
Handler_read_last 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 6
DROP TABLE t1,t2;
CREATE TABLE t1 (c int PRIMARY KEY, e int NOT NULL);
INSERT INTO t1 VALUES (1,0), (2,1);
CREATE TABLE t2 (d int PRIMARY KEY);
INSERT INTO t2 VALUES (1), (2), (3);
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON e<>0 WHERE c=1 AND d IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1
1 SIMPLE t2 index NULL PRIMARY 4 NULL 3 Using where; Using index; Not exists
SELECT * FROM t1 LEFT JOIN t2 ON e<>0 WHERE c=1 AND d IS NULL;
c e d
1 0 NULL
SELECT * FROM t1 LEFT JOIN t2 ON e<>0 WHERE c=1 AND d<=>NULL;
c e d
1 0 NULL
DROP TABLE t1,t2;
#
# Bug#47650: using group by with rollup without indexes returns incorrect
# results with where
#
CREATE TABLE t1 ( a INT );
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 ( a INT, b INT );
INSERT INTO t2 VALUES (1, 1),(1, 2),(1, 3),(2, 4),(2, 5);
EXPLAIN
SELECT t1.a, COUNT( t2.b ), SUM( t2.b ), MAX( t2.b )
FROM t1 LEFT JOIN t2 USING( a )
GROUP BY t1.a WITH ROLLUP;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1 Using temporary; Using filesort
1 SIMPLE t2 ALL NULL NULL NULL NULL 5 Using where
SELECT t1.a, COUNT( t2.b ), SUM( t2.b ), MAX( t2.b )
FROM t1 LEFT JOIN t2 USING( a )
GROUP BY t1.a WITH ROLLUP;
a COUNT( t2.b ) SUM( t2.b ) MAX( t2.b )
1 3 6 3
NULL 3 6 3
EXPLAIN
SELECT t1.a, COUNT( t2.b ), SUM( t2.b ), MAX( t2.b )
FROM t1 JOIN t2 USING( a )
GROUP BY t1.a WITH ROLLUP;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1
1 SIMPLE t2 ALL NULL NULL NULL NULL 5 Using where; Using filesort
SELECT t1.a, COUNT( t2.b ), SUM( t2.b ), MAX( t2.b )
FROM t1 JOIN t2 USING( a )
GROUP BY t1.a WITH ROLLUP;
a COUNT( t2.b ) SUM( t2.b ) MAX( t2.b )
1 3 6 3
NULL 3 6 3
DROP TABLE t1, t2;
#
# Bug#51598 Inconsistent behaviour with a COALESCE statement inside an IN comparison
#
CREATE TABLE t1(f1 INT, f2 INT, f3 INT);
INSERT INTO t1 VALUES (1, NULL, 3);
CREATE TABLE t2(f1 INT, f2 INT);
INSERT INTO t2 VALUES (2, 1);
EXPLAIN EXTENDED SELECT * FROM t1 LEFT JOIN t2 ON t1.f2 = t2.f2
WHERE (COALESCE(t1.f1, t2.f1), f3) IN ((1, 3), (2, 2));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00
1 SIMPLE t2 system NULL NULL NULL NULL 1 100.00
Warnings:
Note 1003 select 1 AS `f1`,NULL AS `f2`,3 AS `f3`,NULL AS `f1`,NULL AS `f2` from `test`.`t2` where 1
SELECT * FROM t1 LEFT JOIN t2 ON t1.f2 = t2.f2
WHERE (COALESCE(t1.f1, t2.f1), f3) IN ((1, 3), (2, 2));
f1 f2 f3 f1 f2
1 NULL 3 NULL NULL
DROP TABLE t1, t2;
#
# Bug#52357: Assertion failed: join->best_read in greedy_search
# optimizer_search_depth=0
#
CREATE TABLE t1( a INT );
INSERT INTO t1 VALUES (1),(2);
SET optimizer_search_depth = 0;
# Should not core dump on query preparation
EXPLAIN
SELECT 1
FROM t1 tt3 LEFT OUTER JOIN t1 tt4 ON 1
LEFT OUTER JOIN t1 tt5 ON 1
LEFT OUTER JOIN t1 tt6 ON 1
LEFT OUTER JOIN t1 tt7 ON 1
LEFT OUTER JOIN t1 tt8 ON 1
RIGHT OUTER JOIN t1 tt2 ON 1
RIGHT OUTER JOIN t1 tt1 ON 1
STRAIGHT_JOIN t1 tt9 ON 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE tt1 ALL NULL NULL NULL NULL 2
1 SIMPLE tt2 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE tt3 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE tt4 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE tt5 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE tt6 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE tt7 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE tt8 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE tt9 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
SET optimizer_search_depth = DEFAULT;
DROP TABLE t1;
#
# Bug#46091 STRAIGHT_JOIN + RIGHT JOIN returns different result
#
CREATE TABLE t1 (f1 INT NOT NULL);
INSERT INTO t1 VALUES (9),(0);
CREATE TABLE t2 (f1 INT NOT NULL);
INSERT INTO t2 VALUES
(5),(3),(0),(3),(1),(0),(1),(7),(1),(0),(0),(8),(4),(9),(0),(2),(0),(8),(5),(1);
SELECT STRAIGHT_JOIN COUNT(*) FROM t1 TA1
RIGHT JOIN t2 TA2 JOIN t2 TA3 ON TA2.f1 ON TA3.f1;
COUNT(*)
476
EXPLAIN SELECT STRAIGHT_JOIN COUNT(*) FROM t1 TA1
RIGHT JOIN t2 TA2 JOIN t2 TA3 ON TA2.f1 ON TA3.f1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE TA2 ALL NULL NULL NULL NULL 20 Using where
1 SIMPLE TA3 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)
1 SIMPLE TA1 ALL NULL NULL NULL NULL 2 Using where
DROP TABLE t1, t2;
#
# Bug#48971 Segfault in add_found_match_trig_cond () at sql_select.cc:5990
#
CREATE TABLE t1(f1 INT, PRIMARY KEY (f1));
INSERT INTO t1 VALUES (1),(2);
EXPLAIN EXTENDED SELECT STRAIGHT_JOIN jt1.f1 FROM t1 AS jt1
LEFT JOIN t1 AS jt2
RIGHT JOIN t1 AS jt3
JOIN t1 AS jt4 ON 1
LEFT JOIN t1 AS jt5 ON 1
ON 1
RIGHT JOIN t1 AS jt6 ON jt6.f1
ON 1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE jt1 index NULL PRIMARY 4 NULL 2 100.00 Using index
1 SIMPLE jt6 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index
1 SIMPLE jt3 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index
1 SIMPLE jt4 index NULL PRIMARY 4 NULL 2 100.00 Using index
1 SIMPLE jt5 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index
1 SIMPLE jt2 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index
Warnings:
Note 1003 select straight_join `test`.`jt1`.`f1` AS `f1` from `test`.`t1` `jt1` left join (`test`.`t1` `jt6` left join (`test`.`t1` `jt3` join `test`.`t1` `jt4` left join `test`.`t1` `jt5` on(1) left join `test`.`t1` `jt2` on(1)) on(`test`.`jt6`.`f1` is true and 1)) on(1) where 1
EXPLAIN EXTENDED SELECT STRAIGHT_JOIN jt1.f1 FROM t1 AS jt1
RIGHT JOIN t1 AS jt2
RIGHT JOIN t1 AS jt3
JOIN t1 AS jt4 ON 1
LEFT JOIN t1 AS jt5 ON 1
ON 1
RIGHT JOIN t1 AS jt6 ON jt6.f1
ON 1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE jt6 index NULL PRIMARY 4 NULL 2 100.00 Using index
1 SIMPLE jt3 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index
1 SIMPLE jt4 index NULL PRIMARY 4 NULL 2 100.00 Using index
1 SIMPLE jt5 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index
1 SIMPLE jt2 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index
1 SIMPLE jt1 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index
Warnings:
Note 1003 select straight_join `test`.`jt1`.`f1` AS `f1` from `test`.`t1` `jt6` left join (`test`.`t1` `jt3` join `test`.`t1` `jt4` left join `test`.`t1` `jt5` on(1) left join `test`.`t1` `jt2` on(1)) on(`test`.`jt6`.`f1` is true and 1) left join `test`.`t1` `jt1` on(1) where 1
DROP TABLE t1;
#
# Bug#57688 Assertion `!table || (!table->write_set || bitmap_is_set(table->write_set, field
#
CREATE TABLE t1 (f1 INT NOT NULL, PRIMARY KEY (f1));
CREATE TABLE t2 (f1 INT NOT NULL, f2 INT NOT NULL, PRIMARY KEY (f1, f2));
INSERT INTO t1 VALUES (4);
INSERT INTO t2 VALUES (3, 3);
INSERT INTO t2 VALUES (7, 7);
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
WHERE t1.f1 = 4
GROUP BY t2.f1, t2.f2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system PRIMARY NULL NULL NULL 1 Using temporary; Using filesort
1 SIMPLE t2 ref PRIMARY PRIMARY 4 const 1 Using index
SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
WHERE t1.f1 = 4
GROUP BY t2.f1, t2.f2;
f1 f1 f2
4 NULL NULL
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
WHERE t1.f1 = 4 AND t2.f1 IS NOT NULL AND t2.f2 IS NOT NULL
GROUP BY t2.f1, t2.f2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system PRIMARY NULL NULL NULL 1
1 SIMPLE t2 ref PRIMARY PRIMARY 4 const 1 Using where; Using index
SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
WHERE t1.f1 = 4 AND t2.f1 IS NOT NULL AND t2.f2 IS NOT NULL
GROUP BY t2.f1, t2.f2;
f1 f1 f2
DROP TABLE t1,t2;
#
# Bug#57034 incorrect OUTER JOIN result when joined on unique key
#
CREATE TABLE t1 (pk INT PRIMARY KEY,
col_int INT,
col_int_unique INT UNIQUE KEY);
INSERT INTO t1 VALUES (1,NULL,2), (2,0,0);
CREATE TABLE t2 (pk INT PRIMARY KEY,
col_int INT,
col_int_unique INT UNIQUE KEY);
INSERT INTO t2 VALUES (1,0,1), (2,0,2);
EXPLAIN
SELECT * FROM t1 LEFT JOIN t2
ON t1.col_int_unique = t2.col_int_unique AND t1.col_int = t2.col_int
WHERE t1.pk=1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1
1 SIMPLE t2 const col_int_unique col_int_unique 5 const 1
SELECT * FROM t1 LEFT JOIN t2
ON t1.col_int_unique = t2.col_int_unique AND t1.col_int = t2.col_int
WHERE t1.pk=1;
pk col_int col_int_unique pk col_int col_int_unique
1 NULL 2 NULL NULL NULL
DROP TABLE t1,t2;
#
# Bug#48046 Server incorrectly processing JOINs on NULL values
#
CREATE TABLE `BB` (
`pk` int(11) NOT NULL AUTO_INCREMENT,
`time_key` time DEFAULT NULL,
`varchar_key` varchar(1) DEFAULT NULL,
`varchar_nokey` varchar(1) DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `time_key` (`time_key`),
KEY `varchar_key` (`varchar_key`)
) ENGINE=MyISAM AUTO_INCREMENT=11 DEFAULT CHARSET=latin1;
INSERT INTO `BB` VALUES (10,'18:27:58',NULL,NULL);
SELECT table1.time_key AS field1, table2.pk
FROM BB table1 LEFT JOIN BB table2
ON table2.varchar_nokey = table1.varchar_key
HAVING field1;
field1 pk
18:27:58 NULL
DROP TABLE BB;
#
# Bug#49600 Server incorrectly processing RIGHT JOIN with
# constant WHERE clause and no index
#
CREATE TABLE `BB` (
`col_datetime_key` datetime DEFAULT NULL,
`col_varchar_key` varchar(1) DEFAULT NULL,
`col_varchar_nokey` varchar(1) DEFAULT NULL,
KEY `col_datetime_key` (`col_datetime_key`),
KEY `col_varchar_key` (`col_varchar_key`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO `BB` VALUES ('1900-01-01 00:00:00',NULL,NULL);
SELECT table1.col_datetime_key
FROM BB table1 RIGHT JOIN BB table2
ON table2 .col_varchar_nokey = table1.col_varchar_key
WHERE 7;
col_datetime_key
NULL
ALTER TABLE BB DISABLE KEYS;
SELECT table1.col_datetime_key
FROM BB table1 RIGHT JOIN BB table2
ON table2 .col_varchar_nokey = table1.col_varchar_key
WHERE 7;
col_datetime_key
NULL
DROP TABLE BB;
#
# Bug#58490: Incorrect result in multi level OUTER JOIN
# in combination with IS NULL
#
CREATE TABLE t1 (i INT NOT NULL);
INSERT INTO t1 VALUES (0), (2),(3),(4);
CREATE TABLE t2 (i INT NOT NULL);
INSERT INTO t2 VALUES (0),(1), (3),(4);
CREATE TABLE t3 (i INT NOT NULL);
INSERT INTO t3 VALUES (0),(1),(2), (4);
CREATE TABLE t4 (i INT NOT NULL);
INSERT INTO t4 VALUES (0),(1),(2),(3) ;
SELECT * FROM
t1 LEFT JOIN
( t2 LEFT JOIN
( t3 LEFT JOIN
t4
ON t4.i = t3.i
)
ON t3.i = t2.i
)
ON t2.i = t1.i
;
i i i i
0 0 0 0
2 NULL NULL NULL
3 3 NULL NULL
4 4 4 NULL
SELECT * FROM
t1 LEFT JOIN
( t2 LEFT JOIN
( t3 LEFT JOIN
t4
ON t4.i = t3.i
)
ON t3.i = t2.i
)
ON t2.i = t1.i
WHERE t4.i IS NULL;
i i i i
2 NULL NULL NULL
3 3 NULL NULL
4 4 4 NULL
SELECT * FROM
t1 LEFT JOIN
( ( t2 LEFT JOIN
t3
ON t3.i = t2.i
)
)
ON t2.i = t1.i
WHERE t3.i IS NULL;
i i i
2 NULL NULL
3 3 NULL
SELECT * FROM
t1 LEFT JOIN
( ( t2 LEFT JOIN
t3
ON t3.i = t2.i
)
JOIN t4
ON t4.i=t2.i
)
ON t2.i = t1.i
WHERE t3.i IS NULL;
i i i i
2 NULL NULL NULL
3 3 NULL 3
4 NULL NULL NULL
SELECT * FROM
t1 LEFT JOIN
( ( t2 LEFT JOIN
t3
ON t3.i = t2.i
)
JOIN (t4 AS t4a JOIN t4 AS t4b ON t4a.i=t4b.i)
ON t4a.i=t2.i
)
ON t2.i = t1.i
WHERE t3.i IS NULL;
i i i i i
2 NULL NULL NULL NULL
3 3 NULL 3 3
4 NULL NULL NULL NULL
SELECT * FROM
t1 LEFT JOIN
( ( t2 LEFT JOIN
t3
ON t3.i = t2.i
)
JOIN (t4 AS t4a, t4 AS t4b)
ON t4a.i=t2.i
)
ON t2.i = t1.i
WHERE t3.i IS NULL;
i i i i i
2 NULL NULL NULL NULL
3 3 NULL 3 0
3 3 NULL 3 1
3 3 NULL 3 2
3 3 NULL 3 3
4 NULL NULL NULL NULL
DROP TABLE t1,t2,t3,t4;
#
# Bug#49322(Duplicate): Server is adding extra NULL row
# on processing a WHERE clause
#
CREATE TABLE h (pk INT NOT NULL, col_int_key INT);
INSERT INTO h VALUES (1,NULL),(4,2),(5,2),(3,4),(2,8);
CREATE TABLE m (pk INT NOT NULL, col_int_key INT);
INSERT INTO m VALUES (1,2),(2,7),(3,5),(4,7),(5,5),(6,NULL),(7,NULL),(8,9);
CREATE TABLE k (pk INT NOT NULL, col_int_key INT);
INSERT INTO k VALUES (1,9),(2,2),(3,5),(4,2),(5,7),(6,0),(7,5);
SELECT TABLE1.pk FROM k TABLE1
RIGHT JOIN h TABLE2 ON TABLE1.col_int_key=TABLE2.col_int_key
RIGHT JOIN m TABLE4 ON TABLE2.col_int_key=TABLE4.col_int_key;
pk
2
2
4
4
NULL
NULL
NULL
NULL
NULL
NULL
NULL
SELECT TABLE1.pk FROM k TABLE1
RIGHT JOIN h TABLE2 ON TABLE1.col_int_key=TABLE2.col_int_key
RIGHT JOIN m TABLE4 ON TABLE2.col_int_key=TABLE4.col_int_key
WHERE TABLE1.pk IS NULL;
pk
NULL
NULL
NULL
NULL
NULL
NULL
NULL
DROP TABLE h,m,k;
# BUG#12567331 - INFINITE LOOP WHEN RESOLVING AN ALIASED COLUMN
# USED IN GROUP BY
CREATE TABLE t1 (
col_varchar_1024_latin1_key varchar(1024),
col_varchar_10_latin1 varchar(10),
col_int int(11),
pk int(11)
);
CREATE TABLE t2 (
col_int_key int(11),
col_int int(11),
pk int(11)
);
PREPARE prep_stmt_9846 FROM '
SELECT alias1.pk AS field1 FROM
t1 AS alias1
LEFT JOIN
(
t2 AS alias2
RIGHT JOIN
(
t2 AS alias3
JOIN t1 AS alias4
ON 1
)
ON 1
)
ON 1
GROUP BY field1';
execute prep_stmt_9846;
field1
execute prep_stmt_9846;
field1
drop table t1,t2;
#
# Bug #11765810 58813: SERVER THREAD HANGS WHEN JOIN + WHERE + GROUP BY
# IS EXECUTED TWICE FROM P
#
CREATE TABLE t1 ( a INT ) ENGINE = MYISAM;
INSERT INTO t1 VALUES (1);
PREPARE prep_stmt FROM '
SELECT 1 AS f FROM t1
LEFT JOIN t1 t2
RIGHT JOIN t1 t3
JOIN t1 t4
ON 1
ON 1
ON 1
GROUP BY f';
EXECUTE prep_stmt;
f
1
EXECUTE prep_stmt;
f
1
DROP TABLE t1;
#
# Bug#49600: outer join of two single-row tables with joining attributes
# evaluated to nulls
create table t1 (a int, b int);
create table t2 (a int, b int);
insert into t1 values (1, NULL);
insert into t2 values (2, NULL);
select * from t1 left join t2 on t1.b=t2.b;
a b a b
1 NULL NULL NULL
select * from t1 left join t2 on t1.b=t2.b where 1=1;
a b a b
1 NULL NULL NULL
drop table t1,t2;
#
# Bug#53161: outer join in the derived table is erroneously converted
# into an inner join for a query with a group by clause
#
create table t1 (pk int not null primary key, a int not null);
create table t2 like t1;
create table t3 like t1;
create table t4 (pk int not null primary key);
insert into t1 values (1000, 1), (1001, 1);
insert into t2 values (2000, 2), (2001, 2);
insert into t3 values (3000, 3), (3001, 2);
insert into t4 values (4000), (4001);
explain extended
select t2.pk,
(select t3.pk+if(isnull(t4.pk),0,t4.pk)
from t3 left join t4 on t4.pk=t3.pk
where t3.pk=t2.pk+1000 limit 1 ) as t
from t1,t2
where t2.pk=t1.pk+1000 and t1.pk>1000
group by t2.pk;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 range PRIMARY PRIMARY 4 NULL 1 100.00 Using where; Using index; Using temporary; Using filesort
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 func 1 100.00 Using where; Using index
2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 func 1 100.00 Using where; Using index
2 DEPENDENT SUBQUERY t4 eq_ref PRIMARY PRIMARY 4 test.t3.pk 1 100.00 Using index
Warnings:
Note 1276 Field or reference 'test.t2.pk' of SELECT #2 was resolved in SELECT #1
Note 1003 /* select#1 */ select `test`.`t2`.`pk` AS `pk`,<expr_cache><`test`.`t2`.`pk`>((/* select#2 */ select `test`.`t3`.`pk` + if(`test`.`t4`.`pk` is null,0,`test`.`t4`.`pk`) from `test`.`t3` left join `test`.`t4` on(`test`.`t4`.`pk` = `test`.`t3`.`pk`) where `test`.`t3`.`pk` = `test`.`t2`.`pk` + 1000 limit 1)) AS `t` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`pk` = `test`.`t1`.`pk` + 1000 and `test`.`t1`.`pk` > 1000 group by `test`.`t2`.`pk`
select t2.pk,
(select t3.pk+if(isnull(t4.pk),0,t4.pk)
from t3 left join t4 on t4.pk=t3.pk
where t3.pk=t2.pk+1000 limit 1 ) as t
from t1,t2
where t2.pk=t1.pk+1000 and t1.pk>1000
group by t2.pk;
pk t
2001 3001
drop table t1,t2,t3,t4;
#
# Bug#57024: Poor performance when conjunctive condition over the outer
# table is used in the on condition of an outer join
#
create table t1 (a int);
insert into t1 values (NULL), (NULL), (NULL), (NULL);
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 values (4), (2), (1), (3);
create table t2 like t1;
insert into t2 select if(t1.a is null, 10, t1.a) from t1;
create table t3 (a int, b int, index idx(a));
insert into t3 values (1, 100), (3, 301), (4, 402), (1, 102), (1, 101);
insert into t3 values (11, 100), (33, 301), (44, 402), (11, 102), (11, 101);
insert into t3 values (22, 100), (53, 301), (64, 402), (22, 102), (22, 101);
analyze table t1,t2,t3;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
test.t2 analyze status Engine-independent statistics collected
test.t2 analyze status OK
test.t3 analyze status Engine-independent statistics collected
test.t3 analyze status OK
flush status;
select sum(t3.b) from t1 left join t3 on t3.a=t1.a and t1.a is not null;
sum(t3.b)
1006
show status like "handler_read%";
Variable_name Value
Handler_read_first 0
Handler_read_key 4
Handler_read_last 0
Handler_read_next 5
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 1048581
flush status;
select sum(t3.b) from t2 left join t3 on t3.a=t2.a and t2.a <> 10;
sum(t3.b)
1006
show status like "handler_read%";
Variable_name Value
Handler_read_first 0
Handler_read_key 4
Handler_read_last 0
Handler_read_next 5
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 1048581
drop table t1,t2,t3;
#
# Bug#57688 Assertion `!table || (!table->write_set || bitmap_is_set(table->write_set, field
#
CREATE TABLE t1 (f1 INT NOT NULL, PRIMARY KEY (f1));
CREATE TABLE t2 (f1 INT NOT NULL, f2 INT NOT NULL, PRIMARY KEY (f1, f2));
INSERT INTO t1 VALUES (4);
INSERT INTO t2 VALUES (3, 3);
INSERT INTO t2 VALUES (7, 7);
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
WHERE t1.f1 = 4
GROUP BY t2.f1, t2.f2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system PRIMARY NULL NULL NULL 1 Using temporary; Using filesort
1 SIMPLE t2 ref PRIMARY PRIMARY 4 const 1 Using index
SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
WHERE t1.f1 = 4
GROUP BY t2.f1, t2.f2;
f1 f1 f2
4 NULL NULL
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
WHERE t1.f1 = 4 AND t2.f1 IS NOT NULL AND t2.f2 IS NOT NULL
GROUP BY t2.f1, t2.f2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system PRIMARY NULL NULL NULL 1
1 SIMPLE t2 ref PRIMARY PRIMARY 4 const 1 Using where; Using index
SELECT * FROM t1 LEFT JOIN t2 ON t2.f1 = t1.f1
WHERE t1.f1 = 4 AND t2.f1 IS NOT NULL AND t2.f2 IS NOT NULL
GROUP BY t2.f1, t2.f2;
f1 f1 f2
DROP TABLE t1,t2;
#
# Bug#13068506 - QUERY WITH GROUP BY ON NON-AGGR COLUMN RETURNS
# WRONG RESULT
#
CREATE TABLE t1 (i1 int);
INSERT INTO t1 VALUES (100), (101);
CREATE TABLE t2 (i2 int, i3 int);
INSERT INTO t2 VALUES (20,1),(10,2);
CREATE TABLE t3 (i4 int(11));
INSERT INTO t3 VALUES (1),(2);
SELECT (
SELECT MAX( t2.i2 )
FROM t3 RIGHT JOIN t2 ON ( t2.i3 = 2 )
WHERE t2.i3 <> t1.i1
) AS field1
FROM t1;;
field1
20
20
SELECT (
SELECT MAX( t2.i2 )
FROM t3 RIGHT JOIN t2 ON ( t2.i3 = 2 )
WHERE t2.i3 <> t1.i1
) AS field1
FROM t1 GROUP BY field1;;
field1
20
drop table t1,t2,t3;
# End of test for Bug#13068506
End of 5.1 tests
#
# LP BUG#994392: Wrong result with RIGHT/LEFT JOIN and ALL subquery
# predicate in WHERE condition.
#
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES(9);
CREATE TABLE t2(b INT);
INSERT INTO t2 VALUES(8);
CREATE TABLE t3(c INT);
INSERT INTO t3 VALUES(3);
SELECT * FROM t2 RIGHT JOIN t3 ON(c = b) WHERE b < ALL(SELECT a FROM t1 WHERE a <= 7);
b c
NULL 3
SELECT * FROM t3 LEFT JOIN t2 ON(c = b) WHERE b < ALL(SELECT a FROM t1 WHERE a <= 7);
c b
3 NULL
SELECT * FROM t2 RIGHT JOIN t3 ON(c = b) WHERE b not in (SELECT a FROM t1 WHERE a <= 7);
b c
NULL 3
SELECT * FROM t3 LEFT JOIN t2 ON(c = b) WHERE b not in (SELECT a FROM t1 WHERE a <= 7);
c b
3 NULL
drop table t1,t2,t3;
End of 5.2 tests
#
# LP bug #813447: LEFT JOIN with single-row inner table and
# a subquery in ON expression
#
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (0);
CREATE TABLE t2 (a int);
INSERT INTO t2 VALUES (0);
CREATE TABLE t3 (a int);
INSERT INTO t3 VALUES (0), (0);
SELECT t2.a FROM t1 LEFT JOIN t2 ON (6) IN (SELECT a FROM t3);
a
NULL
EXPLAIN EXTENDED
SELECT t2.a FROM t1 LEFT JOIN t2 ON (6) IN (SELECT a FROM t3);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00
1 PRIMARY t2 system NULL NULL NULL NULL 1 100.00
2 SUBQUERY t3 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 /* select#1 */ select NULL AS `a` from `test`.`t2` where 1
DROP TABLE t1,t2,t3;
#
# LP bug #817384 Wrong result with outer join + subquery in ON
# clause +unique key
#
CREATE TABLE t1 ( c int NOT NULL , b char(1) NOT NULL ) ;
INSERT INTO t1 VALUES (1,'b');
CREATE TABLE t2 ( a int NOT NULL , b char(1) NOT NULL , PRIMARY KEY (a)) ;
INSERT INTO t2 VALUES (1,'a');
create table t3 (c1 char(1), c2 char(2));
insert into t3 values ('c','d');
insert into t3 values ('c','d');
EXPLAIN SELECT t2.b
FROM t1 LEFT JOIN t2 ON t1.c = t2.a AND ( t2.b , t1.b ) IN (SELECT * from t3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 const 1 Using where
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 Using where
SELECT t2.b
FROM t1 LEFT JOIN t2 ON t1.c = t2.a AND ( t2.b , t1.b ) IN (SELECT * from t3);
b
NULL
EXPLAIN SELECT t2.b
FROM t1 LEFT JOIN t2 ON (t2.b) IN (SELECT c2 from t3) AND t2.a = 1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system NULL NULL NULL NULL 1
1 PRIMARY t2 const PRIMARY PRIMARY 4 const 1 Using where
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 Using where
SELECT t2.b
FROM t1 LEFT JOIN t2 ON (t2.b) IN (SELECT c2 from t3) AND t2.a = 1;
b
NULL
DROP TABLE t1,t2,t3;
#
# lp:825035 second execution of PS with outer join
#
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (1),(2),(3),(4);
CREATE TABLE t2 (a int);
PREPARE stmt FROM
"SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a";
EXECUTE stmt;
a a
1 NULL
2 NULL
3 NULL
4 NULL
EXECUTE stmt;
a a
1 NULL
2 NULL
3 NULL
4 NULL
DEALLOCATE PREPARE stmt;
DROP TABLE t1,t2;
#
# lp:838633 second execution of PS with outer join
# converted to inner join
#
CREATE TABLE t1 ( b int NOT NULL ) ;
INSERT INTO t1 VALUES (9),(10);
CREATE TABLE t2 ( b int NOT NULL, PRIMARY KEY (b)) ;
INSERT INTO t2 VALUES
(75),(76),(77),(78),(79),(80),(81),(82),(83),(84),(85),(86),(87),(88),(89),
(10), (90),(91),(92),(93),(94),(95),(96),(97),(98),(99),(100);
CREATE TABLE t3 ( a int, b int NOT NULL , PRIMARY KEY (b)) ;
INSERT INTO t3 VALUES
(0,6),(0,7),(0,8),(2,9),(0,10),(2,21),(0,22),(2,23),(2,24),(2,25);
set @save_join_cache_level= @@join_cache_level;
SET SESSION join_cache_level=4;
EXPLAIN EXTENDED
SELECT * FROM (t2 LEFT JOIN t1 ON t1.b = t2.b) JOIN t3 ON t1.b = t3.b;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t2 hash_index PRIMARY #hash#PRIMARY:PRIMARY 4:4 test.t1.b 27 3.70 Using index; Using join buffer (flat, BNLH join)
1 SIMPLE t3 hash_ALL PRIMARY #hash#PRIMARY 4 test.t1.b 10 10.00 Using join buffer (incremental, BNLH join)
Warnings:
Note 1003 select `test`.`t2`.`b` AS `b`,`test`.`t1`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t2` join `test`.`t1` join `test`.`t3` where `test`.`t2`.`b` = `test`.`t1`.`b` and `test`.`t3`.`b` = `test`.`t1`.`b`
PREPARE stmt FROM
'SELECT * FROM (t2 LEFT JOIN t1 ON t1.b = t2.b) JOIN t3 ON t1.b = t3.b';
EXECUTE stmt;
b b a b
10 10 0 10
EXECUTE stmt;
b b a b
10 10 0 10
DEALLOCATE PREPARE stmt;
SET SESSION join_cache_level=@save_join_cache_level;
DROP TABLE t1,t2,t3;
#
# LP bug #943543: LEFT JOIN converted to JOIN with
# ORed IS NULL(primary key) in WHERE clause
#
CREATE TABLE t1 (
a int, b int NOT NULL, pk int NOT NULL,
PRIMARY KEY (pk), INDEX idx(b)
);
INSERT INTO t1 VALUES
(NULL,1,1), (6,2,2), (5,3,3), (NULL,4,4),
(1,9,6), (8,5,7), (NULL,8,8), (8,1,5);
CREATE TABLE t2 (pk int PRIMARY KEY);
INSERT INTO t2 VALUES (3), (8), (5);
EXPLAIN EXTENDED
SELECT t1.pk FROM t2 JOIN t1 ON t2.pk = t1.a
WHERE t1.b BETWEEN 5 AND 6 AND t1.pk IS NULL OR t1.pk = 5
ORDER BY t1.pk;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 100.00
1 SIMPLE t2 const PRIMARY PRIMARY 4 const 1 100.00 Using index
Warnings:
Note 1003 select 5 AS `pk` from `test`.`t2` join `test`.`t1` where 1 order by 5
SELECT t1.pk FROM t2 JOIN t1 ON t2.pk = t1.a
WHERE t1.b BETWEEN 5 AND 6 AND t1.pk IS NULL OR t1.pk = 5
ORDER BY t1.pk;
pk
5
EXPLAIN EXTENDED
SELECT t1.pk FROM t2 LEFT JOIN t1 ON t2.pk = t1.a
WHERE t1.b BETWEEN 5 AND 6 AND t1.pk IS NULL OR t1.pk = 5
ORDER BY t1.pk;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 const PRIMARY,idx PRIMARY 4 const 1 100.00
1 SIMPLE t2 const PRIMARY PRIMARY 4 const 1 100.00 Using index
Warnings:
Note 1003 select 5 AS `pk` from `test`.`t2` join `test`.`t1` where 1 order by 5
SELECT t1.pk FROM t2 LEFT JOIN t1 ON t2.pk = t1.a
WHERE t1.b BETWEEN 5 AND 6 AND t1.pk IS NULL OR t1.pk = 5
ORDER BY t1.pk;
pk
5
DROP TABLE t2;
CREATE TABLE t2 (c int, d int, KEY (c));
INSERT INTO t2 VALUES
(3,30), (8,88), (5,50), (8,81),
(4,40), (9,90), (7,70), (9,90),
(13,130), (18,188), (15,150), (18,181),
(14,140), (19,190), (17,170), (19,190);
INSERT INTO t1 VALUES (8,5,9);
EXPLAIN EXTENDED
SELECT t1.b, t2.c, t2.d FROM t2 JOIN t1 ON t2.c = t1.a
WHERE t1.pk BETWEEN 5 AND 6 AND t1.b IS NULL OR t1.b = 5
ORDER BY t1.b;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ref idx idx 4 const 2 100.00 Using where
1 SIMPLE t2 ref c c 5 test.t1.a 1 100.00
Warnings:
Note 1003 select `test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` join `test`.`t1` where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t1`.`b` = 5 order by `test`.`t1`.`b`
SELECT t1.b, t2.c, t2.d FROM t2 JOIN t1 ON t2.c = t1.a
WHERE t1.pk BETWEEN 5 AND 6 AND t1.b IS NULL OR t1.b = 5
ORDER BY t1.b;
b c d
5 8 88
5 8 81
5 8 88
5 8 81
EXPLAIN EXTENDED
SELECT t1.b, t2.c, t2.d FROM t2 LEFT JOIN t1 ON t2.c = t1.a
WHERE t1.pk BETWEEN 5 AND 6 AND t1.b IS NULL OR t1.b = 5
ORDER BY t1.b;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ref PRIMARY,idx idx 4 const 2 100.00 Using where
1 SIMPLE t2 ref c c 5 test.t1.a 1 100.00
Warnings:
Note 1003 select `test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` join `test`.`t1` where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t1`.`b` = 5 order by `test`.`t1`.`b`
SELECT t1.b, t2.c, t2.d FROM t2 LEFT JOIN t1 ON t2.c = t1.a
WHERE t1.pk BETWEEN 5 AND 6 AND t1.b IS NULL OR t1.b = 5
ORDER BY t1.b;
b c d
5 8 88
5 8 81
5 8 88
5 8 81
DROP TABLE t1,t2;
#
# Bug mdev-4336: LEFT JOIN with disjunctive
# <non-nullable datetime field> IS NULL in WHERE
# causes a hang and eventual crash
#
CREATE TABLE t1 (
id int(11) NOT NULL,
modified datetime NOT NULL,
PRIMARY KEY (id)
);
SELECT a.* FROM t1 a LEFT JOIN t1 b ON a.id = b.id
WHERE a.modified > b.modified or b.modified IS NULL;
id modified
DROP TABLE t1;
#
# MDEV-4817: Optimizer fails to optimize expression of the form 'FOO' IS NULL
#
create table t0 (a int not null);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
alter table t0 add person_id varchar(255) not null;
create table t1 (pk int not null primary key);
insert into t1 select A.a + 10*B.a from t0 A, t0 B;
explain select * from t1 left join t0 on t0.a=t1.pk where t0.person_id='fooo' or 'xyz' IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 Using index
explain select * from t1 left join t0 on t0.a=t1.pk where t0.person_id='fooo';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 Using index
explain select * from t1 left join t0 on t0.a=t1.pk where t0.person_id='fooo' or t0.person_id='bar';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 Using where
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 Using index
drop table t0, t1;
#
# MDEV-4836: Wrong result on <not null date column> IS NULL (old documented hack stopped working)
# (this is a regression after fix for MDEV-4817)
#
CREATE TABLE t1 (id INT, d DATE NOT NULL);
INSERT INTO t1 VALUES (1,'0000-00-00'),(2,'0000-00-00');
CREATE TABLE t2 (i INT);
SELECT * FROM t1 LEFT JOIN t2 ON (id=i) WHERE NULL OR d IS NULL;
id d i
1 0000-00-00 NULL
2 0000-00-00 NULL
DROP TABLE t1,t2;
CREATE TABLE t1 (i1 INT, d1 DATE NOT NULL);
INSERT INTO t1 VALUES (1,'2012-12-21'),(2,'0000-00-00');
CREATE TABLE t2 (i2 INT, j2 INT);
INSERT INTO t2 VALUES (1,10),(2,20);
SELECT * FROM t1 LEFT JOIN t2 ON i1 = j2 WHERE d1 IS NULL AND 1 OR i1 = i2;
i1 d1 i2 j2
2 0000-00-00 NULL NULL
DROP TABLE t1,t2;
# Another testcase
CREATE TABLE t1 (i1 INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (NULL);
CREATE TABLE t2 (i2 INT, a INT, b INT) ENGINE=MyISAM;
CREATE ALGORITHM=TEMPTABLE VIEW v2 AS SELECT * FROM t2;
INSERT INTO t2 VALUES (NULL,1,2),(NULL,2,3);
SELECT * FROM t1 LEFT JOIN v2 ON i1 = i2 WHERE a < b;
i1 i2 a b
SELECT * FROM t1 LEFT JOIN t2 ON i1 = i2 WHERE a < b;
i1 i2 a b
drop view v2;
drop table t1,t2;
#
# Bug mdev-4942: LEFT JOIN with conjunctive
# <non-nullable datetime field> IS NULL in WHERE
# causes an assert failure
#
CREATE TABLE t1 ( i1 int, d1 date );
INSERT INTO t1 VALUES (1,'2001-06-26'), (2,'2000-11-16');
CREATE TABLE t2 ( i2 int, d2 date NOT NULL );
INSERT INTO t2 VALUES (3,'2000-03-06'), (4,'2007-09-25');
SELECT * FROM t1 LEFT JOIN t2 ON i1 = i2 WHERE d1 IS NULL AND d2 IS NULL;
i1 d1 i2 d2
DROP TABLE t1,t2;
#
# Bug mdev-4952: LEFT JOIN with disjunctive
# <non-nullable datetime field> IS NULL in WHERE
# causes an assert failure
#
CREATE TABLE t1 (a1 int, b1 int NOT NULL) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1, 10), (2, 11);
CREATE TABLE t2 (dt datetime NOT NULL, a2 int, b2 int) ENGINE=MyISAM;
INSERT INTO t2 VALUES
('2006-10-08 09:34:54', 1, 100), ('2001-01-19 01:04:43', 2, 200);
SELECT * FROM t1 LEFT JOIN t2 ON a1 = a2
WHERE ( dt IS NULL OR FALSE ) AND b2 IS NULL;
a1 b1 dt a2 b2
DROP TABLE t1,t2;
#
# Bug mdev-4962: nested outer join with
# <non-nullable datetime field> IS NULL in WHERE
# causes an assert failure
#
CREATE TABLE t1 (i1 int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (i2 int) ENGINE=MyISAM;
INSERT INTO t2 VALUES (10),(20);
CREATE TABLE t3 (i3 int, d3 datetime NOT NULL) ENGINE=MyISAM;
INSERT INTO t3 VALUES (8,'2008-12-04 17:53:42'),(9,'2012-12-21 12:12:12');
SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON i2 = i3 ON i1 = i3
WHERE d3 IS NULL;
i1 i2 i3 d3
1 NULL NULL NULL
2 NULL NULL NULL
EXPLAIN EXTENDED
SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON i2 = i3 ON i1 = i3
WHERE d3 IS NULL;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`i1` AS `i1`,`test`.`t2`.`i2` AS `i2`,`test`.`t3`.`i3` AS `i3`,`test`.`t3`.`d3` AS `d3` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(`test`.`t2`.`i2` = `test`.`t1`.`i1` and `test`.`t3`.`i3` = `test`.`t1`.`i1`) where `test`.`t3`.`d3` = 0 or `test`.`t3`.`d3` is null
DROP TABLE t1,t2,t3;
#
# Bug mdev-6705: wrong on expression after constant row substitution
# that triggers a simplification of WHERE condition
#
CREATE TABLE t1 (a int, b int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (10,8);
CREATE TABLE t2 (c int) ENGINE=MyISAM;
INSERT INTO t2 VALUES (8),(9);
CREATE TABLE t3 (d int) ENGINE=MyISAM;
INSERT INTO t3 VALUES (3),(8);
EXPLAIN EXTENDED
SELECT * FROM t1 INNER JOIN t2 ON c = b LEFT JOIN t3 ON d = a
WHERE b IN (1,2,3) OR b = d;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select 10 AS `a`,8 AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t3`.`d` AS `d` from `test`.`t2` left join `test`.`t3` on(`test`.`t3`.`d` = 10) where `test`.`t2`.`c` = 8 and `test`.`t3`.`d` = 8
SELECT * FROM t1 INNER JOIN t2 ON c = b LEFT JOIN t3 ON d = a
WHERE b IN (1,2,3) OR b = d;
a b c d
DROP TABLE t1,t2,t3;
#
# MDEV-6634: Wrong estimates for ref(const) and key IS NULL predicate
#
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a int, b int, c int, key(b), key(c));
insert into t2 select
@a:=A.a + 10*B.a+100*C.a,
IF(@a<900, NULL, @a),
IF(@a<400, NULL, @a)
from t1 A, t1 B, t1 C;
delete from t1 where a=0;
# Check that there are different #rows of NULLs for b and c, both !=10:
explain select * from t2 force index (b) where b is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ref b b 5 const 780 Using index condition
explain select * from t2 force index (c) where c is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ref c c 5 const 282 Using index condition
explain select * from t1 left join t2 on t2.b is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 9
1 SIMPLE t2 ALL b NULL NULL NULL 1000 Using where
explain select * from t1 left join t2 on t2.c is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 9
1 SIMPLE t2 ALL c NULL NULL NULL 1000 Using where
drop table t1,t2;
#
# MDEV-10006: optimizer doesn't convert outer join to inner on views with WHERE clause
#
CREATE TABLE t1(i1 int primary key, v1 int, key(v1));
INSERT INTO t1 VALUES (1, 1);
INSERT INTO t1 VALUES (2, 2);
INSERT INTO t1 VALUES (3, 3);
INSERT INTO t1 VALUES (4, 4);
INSERT INTO t1 VALUES (5, 3);
INSERT INTO t1 VALUES (6, 6);
INSERT INTO t1 VALUES (7, 7);
INSERT INTO t1 VALUES (8, 8);
INSERT INTO t1 VALUES (9, 9);
CREATE TABLE t2(i2 int primary key, v2 int, key(v2));
INSERT INTO t2 VALUES (1, 1);
INSERT INTO t2 VALUES (2, 2);
INSERT INTO t2 VALUES (3, 3);
INSERT INTO t2 VALUES (4, 4);
INSERT INTO t2 VALUES (5, 3);
INSERT INTO t2 VALUES (6, 6);
INSERT INTO t2 VALUES (7, 7);
INSERT INTO t2 VALUES (8, 8);
INSERT INTO t2 VALUES (9, 9);
CREATE TABLE t3(i3 int primary key, v3 int, key(v3));
INSERT INTO t3 VALUES (2, 2);
INSERT INTO t3 VALUES (4, 4);
INSERT INTO t3 VALUES (6, 6);
INSERT INTO t3 VALUES (8, 8);
# This should have a join order of t3,t1,t2 (or t3,t2,t1, the idea is that t3 is the first one)
EXPLAIN EXTENDED
SELECT * FROM
(SELECT t1.i1 as i1, t1.v1 as v1,
t2.i2 as i2, t2.v2 as v2,
t3.i3 as i3, t3.v3 as v3
FROM t1 JOIN t2 on t1.i1 = t2.i2
LEFT JOIN t3 on t2.i2 = t3.i3
) as w1
WHERE v3 = 4;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t3 ref PRIMARY,v3 v3 5 const 1 100.00
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t3.i3 1 100.00
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t3.i3 1 100.00
Warnings:
Note 1003 select `test`.`t1`.`i1` AS `i1`,`test`.`t1`.`v1` AS `v1`,`test`.`t2`.`i2` AS `i2`,`test`.`t2`.`v2` AS `v2`,`test`.`t3`.`i3` AS `i3`,`test`.`t3`.`v3` AS `v3` from `test`.`t1` join `test`.`t2` join `test`.`t3` where `test`.`t3`.`v3` = 4 and `test`.`t1`.`i1` = `test`.`t3`.`i3` and `test`.`t2`.`i2` = `test`.`t3`.`i3`
# This should have the same join order like the query above:
EXPLAIN EXTENDED
SELECT * FROM
(SELECT t1.i1 as i1, t1.v1 as v1,
t2.i2 as i2, t2.v2 as v2,
t3.i3 as i3, t3.v3 as v3
FROM t1 JOIN t2 on t1.i1 = t2.i2
LEFT JOIN t3 on t2.i2 = t3.i3
WHERE t1.i1 = t2.i2
AND 1 = 1
) as w2
WHERE v3 = 4;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t3 ref PRIMARY,v3 v3 5 const 1 100.00
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t3.i3 1 100.00
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t3.i3 1 100.00
Warnings:
Note 1003 select `test`.`t1`.`i1` AS `i1`,`test`.`t1`.`v1` AS `v1`,`test`.`t2`.`i2` AS `i2`,`test`.`t2`.`v2` AS `v2`,`test`.`t3`.`i3` AS `i3`,`test`.`t3`.`v3` AS `v3` from `test`.`t1` join `test`.`t2` join `test`.`t3` where `test`.`t3`.`v3` = 4 and `test`.`t1`.`i1` = `test`.`t3`.`i3` and `test`.`t2`.`i2` = `test`.`t3`.`i3`
drop table t1,t2,t3;
#
# MDEV-11958: LEFT JOIN with stored routine produces incorrect result
#
CREATE TABLE t (x INT);
INSERT INTO t VALUES(1),(NULL);
CREATE FUNCTION f (val INT, ret INT) RETURNS INT DETERMINISTIC RETURN IFNULL(val, ret);
SELECT t1.x, t2.x, IFNULL(t2.x,0), f(t2.x,0)
FROM t t1 LEFT JOIN t t2
ON t1.x = t2.x
WHERE IFNULL(t2.x,0)=0;
x x IFNULL(t2.x,0) f(t2.x,0)
NULL NULL 0 0
explain extended
SELECT t1.x, t2.x, IFNULL(t2.x,0), f(t2.x,0)
FROM t t1 LEFT JOIN t t2
ON t1.x = t2.x
WHERE IFNULL(t2.x,0)=0;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`x` AS `x`,`test`.`t2`.`x` AS `x`,ifnull(`test`.`t2`.`x`,0) AS `IFNULL(t2.x,0)`,`f`(`test`.`t2`.`x`,0) AS `f(t2.x,0)` from `test`.`t` `t1` left join `test`.`t` `t2` on(`test`.`t2`.`x` = `test`.`t1`.`x`) where ifnull(`test`.`t2`.`x`,0) = 0
SELECT t1.x, t2.x, IFNULL(t2.x,0), f(t2.x,0)
FROM t t1 LEFT JOIN t t2
ON t1.x = t2.x
WHERE f(t2.x,0)=0;
x x IFNULL(t2.x,0) f(t2.x,0)
NULL NULL 0 0
explain extended
SELECT t1.x, t2.x, IFNULL(t2.x,0), f(t2.x,0)
FROM t t1 LEFT JOIN t t2
ON t1.x = t2.x
WHERE f(t2.x,0)=0;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`x` AS `x`,`test`.`t2`.`x` AS `x`,ifnull(`test`.`t2`.`x`,0) AS `IFNULL(t2.x,0)`,`f`(`test`.`t2`.`x`,0) AS `f(t2.x,0)` from `test`.`t` `t1` left join `test`.`t` `t2` on(`test`.`t2`.`x` = `test`.`t1`.`x`) where `f`(`test`.`t2`.`x`,0) = 0
drop function f;
drop table t;
CREATE TABLE t1 (
col1 DECIMAL(33,5) NULL DEFAULT NULL,
col2 DECIMAL(33,5) NULL DEFAULT NULL
);
CREATE TABLE t2 (
col1 DECIMAL(33,5) NULL DEFAULT NULL,
col2 DECIMAL(33,5) NULL DEFAULT NULL,
col3 DECIMAL(33,5) NULL DEFAULT NULL
);
INSERT INTO t1 VALUES (2, 1.1), (2, 2.1);
INSERT INTO t2 VALUES (3, 3.1, 4), (1, 1, NULL);
CREATE FUNCTION f1 ( p_num DECIMAL(45,15), p_return DECIMAL(45,15))
RETURNS decimal(33,5)
LANGUAGE SQL
DETERMINISTIC
CONTAINS SQL
SQL SECURITY INVOKER
BEGIN
IF p_num IS NULL THEN
RETURN p_return;
ELSE
RETURN p_num;
END IF;
END |
SELECT t1.col1, t2.col1, t2.col3
FROM t1 LEFT OUTER JOIN t2 ON t1.col1 = t2.col2
WHERE IFNULL(t2.col3,0) = 0;
col1 col1 col3
2.00000 NULL NULL
2.00000 NULL NULL
EXPLAIN EXTENDED SELECT t1.col1, t2.col1, t2.col3
FROM t1 LEFT OUTER JOIN t2 ON t1.col1 = t2.col2
WHERE IFNULL(t2.col3,0) = 0;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`col1` AS `col1`,`test`.`t2`.`col1` AS `col1`,`test`.`t2`.`col3` AS `col3` from `test`.`t1` left join `test`.`t2` on(`test`.`t2`.`col2` = `test`.`t1`.`col1`) where ifnull(`test`.`t2`.`col3`,0) = 0
SELECT t1.col1, t2.col1, t2.col3
FROM t1 LEFT OUTER JOIN t2 ON t1.col1 = t2.col2
WHERE f1(t2.col3,0) = 0;
col1 col1 col3
2.00000 NULL NULL
2.00000 NULL NULL
EXPLAIN EXTENDED SELECT t1.col1, t2.col1, t2.col3
FROM t1 LEFT OUTER JOIN t2 ON t1.col1 = t2.col2
WHERE f1(t2.col3,0) = 0;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`col1` AS `col1`,`test`.`t2`.`col1` AS `col1`,`test`.`t2`.`col3` AS `col3` from `test`.`t1` left join `test`.`t2` on(`test`.`t2`.`col2` = `test`.`t1`.`col1`) where `f1`(`test`.`t2`.`col3`,0) = 0
DROP FUNCTION f1;
DROP TABLE t1,t2;
#
# MDEV-10397: Server crashes in key_copy with join_cache_level > 2 and join on BIT fields
#
CREATE TABLE t1 (b1 BIT NOT NULL);
INSERT INTO t1 VALUES (0),(1);
CREATE TABLE t2 (b2 BIT NOT NULL);
INSERT INTO t2 VALUES (0),(1);
set @save_join_cache_level= @@join_cache_level;
SET @@join_cache_level = 3;
SELECT t1.b1+'0' , t2.b2 + '0' FROM t1 LEFT JOIN t2 ON b1 = b2;
t1.b1+'0' t2.b2 + '0'
0 0
1 1
DROP TABLE t1, t2;
set @@join_cache_level= @save_join_cache_level;
#
# MDEV-14779: using left join causes incorrect results with materialization and derived tables
#
create table t1(id int);
insert into t1 values (1),(2);
create table t2(sid int, id int);
insert into t2 values (1,1),(2,2);
select * from t1 t
left join (select * from t2 where sid in (select max(sid) from t2 where 0=1 group by id)) r
on t.id=r.id ;
id sid id
1 NULL NULL
2 NULL NULL
drop table t1, t2;
#
# MDEV-16726: SELECT with STRAGHT JOIN containing NESTED RIGHT JOIN
# converted to INNER JOIN with first constant inner table
#
CREATE TABLE t1 (
pk int PRIMARY KEY, i1 int, v1 varchar(1), v2 varchar(1), KEY v1 (v1,i1)
) engine=MyISAM;
INSERT INTO t1 VALUES
(8,3,'c','c'),(9,4,'z','z'),(10,3,'i','i'),(11,186,'x','x'),
(14,226,'m','m'),(15,133,'p','p');
CREATE TABLE t2 (
pk int PRIMARY KEY, i1 int, v1 varchar(1), v2 varchar(1)
) engine=MyISAM;
INSERT INTO t2 VALUES (10,6,'p','p');
EXPLAIN EXTENDED
SELECT STRAIGHT_JOIN t2.v2
FROM
(t1 as tb1 LEFT JOIN t1 AS tb2 ON tb2.v1 = tb1.v2)
RIGHT JOIN
(t2,t1)
ON t1.pk = t2.pk AND t2.v2 = tb1.v1
WHERE tb1.pk = 40
ORDER BY tb1.i1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
Warnings:
Note 1003 select straight_join 'p' AS `v2` from `test`.`t1` join `test`.`t1` `tb1` left join `test`.`t1` `tb2` on(multiple equal(NULL, NULL)) where 0 order by NULL
EXPLAIN EXTENDED
SELECT STRAIGHT_JOIN t2.v2
FROM
(t2,t1)
LEFT JOIN
(t1 as tb1 LEFT JOIN t1 AS tb2 ON tb2.v1 = tb1.v2)
ON t1.pk = t2.pk AND t2.v2 = tb1.v1
WHERE tb1.pk = 40
ORDER BY tb1.i1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
Warnings:
Note 1003 select straight_join 'p' AS `v2` from `test`.`t1` join `test`.`t1` `tb1` left join `test`.`t1` `tb2` on(multiple equal(NULL, NULL)) where 0 order by NULL
SELECT STRAIGHT_JOIN DISTINCT t2.v2
FROM
(t1 as tb1 LEFT JOIN t1 AS tb2 ON tb2.v1 = tb1.v2)
RIGHT JOIN
(t2,t1)
ON t1.pk = t2.pk AND t2.v2 = tb1.v1
WHERE tb1.pk = 40
ORDER BY tb1.i1;
v2
DROP TABLE t1,t2;
#
# MDEV-19790 : IS NOT TRUE / IS NOT FALSE predicates over
# inner tables of outer joins
#
create table t1 (a int);
create table t2 (b int);
insert into t1 values (3), (7), (1);
insert into t2 values (7), (4), (3);
select * from t1 left join t2 on a=b;
a b
3 3
7 7
1 NULL
select * from t1 left join t2 on a=b where (b > 3) is not true;
a b
3 3
1 NULL
explain extended select * from t1 left join t2 on a=b where (b > 3) is not true;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` left join `test`.`t2` on(`test`.`t2`.`b` = `test`.`t1`.`a`) where `test`.`t2`.`b` > 3 is not true
select * from t1 left join t2 on a=b where (b > 3) is not false;
a b
7 7
1 NULL
explain extended select * from t1 left join t2 on a=b where (b > 3) is not false;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` left join `test`.`t2` on(`test`.`t2`.`b` = `test`.`t1`.`a`) where `test`.`t2`.`b` > 3 is not false
drop table t1,t2;
# end of 5.5 tests
#
# MDEV-19258: chained right joins all converted to inner joins
#
CREATE TABLE t1 (
id int NOT NULL AUTO_INCREMENT,
timestamp bigint NOT NULL,
modifiedBy varchar(255) DEFAULT NULL,
PRIMARY KEY (id)
);
CREATE TABLE t2 (
id int NOT NULL,
REV int NOT NULL,
REVTYPE tinyint DEFAULT NULL,
profile_id int DEFAULT NULL,
PRIMARY KEY (id,REV)
);
CREATE TABLE t3 (
id int NOT NULL,
REV int NOT NULL,
person_id int DEFAULT NULL,
PRIMARY KEY (id,REV)
);
CREATE TABLE t4 (
id int NOT NULL,
REV int NOT NULL,
PRIMARY KEY (id,REV)
);
INSERT INTO t1 VALUES
(1,1294391193890,'Cxqy$*9.kKeE'),(2,1294643906883,'rE4wqGV0gif@'),
(3,1294643927456,'L?3yt(%dY$Br'),(4,1294644343525,'WH&ObiZ$#2S4'),
(5,1294644616416,'YXnCbt?olUZ0'),(6,1294644954537,'8Npe4!(#lU@k'),
(7,1294645046659,'knc0GhXB1#ib'),(8,1294645183829,'w*oPpVfuS8^m'),
(9,1294645386701,'hwXR@3qVzrbU'),(10,1294645525982,'BeLW*Y9ndP0l'),
(11,1294645627723,'nTegib^)qZ$I'),(12,1294650860266,'u62C^Kzx3wH8'),
(13,1294657613745,'4&BkFjGa!qLg'),(14,1294660627161,')anpt312SCoh'),
(15,1294661023336,'LtJ2PX?*kTmx'),(16,1294662838066,'POGRr@?#ofpl'),
(17,1294663020989,'o.)1EOT2jnF7'),(18,1294663308065,'&TZ0F0LHE6.h'),
(19,1294664900039,'j)kSC%^In$9d'),(20,1294668904556,'97glN50)cAo.'),
(21,1294728056853,'lrKZxmw?I.Ek'),(22,1294728157174,'@P*SRg!pT.q?'),
(23,1294728327099,'W9gPrptF.)8n'),(24,1294728418481,'$q*c^sM&URd#'),
(25,1294728729620,'9*f4&bTPRtHo'),(26,1294728906014,')4VtTEnS7$oI'),
(27,1294732190003,'8dkNSPq2u3AQ'),(28,1294733205065,'SV2N6IoEf438'),
(29,1294741984927,'rBKj.0S^Ey%*'),(30,1294751748352,'j$2DvlBqk)Fw'),
(31,1294753902212,'C$N6OrEw8elz'),(32,1294758120598,'DCSVZw!rnxXq'),
(33,1294761769556,'OTS@QU8a6s5c'),(34,1294816845305,'IUE2stG0D3L5'),
(35,1294816966909,'Xd16yka.9nHe'),(36,1294817116302,'lOQHZpm%!8qb'),
(37,1294817374775,'^&pE3IhNf7ey'),(38,1294817538907,'oEn4#7C0Vhfp'),
(39,1294818482950,'bx54J*O0Va&?'),(40,1294819047024,'J%@a&1.qgdb?'),
(41,1294821826077,'C9kojr$L3Phz'),(42,1294825454458,'gG#BOnM80ZPi'),
(43,1294904129918,'F^!TrjM#zdvc'),(44,1294904254166,'Va&Tb)k0RvlM'),
(45,1294904414964,'dJjq0M6HvhR#'),(46,1294904505784,'nJmxg)ELqY(b'),
(47,1294904602835,'dhF#or$Vge!7'),(48,1294904684728,'?bIh5E3l!0em'),
(49,1294904877898,'Y*WflOdcxnk.'),(50,1294905002390,'*?H!lUgez5A.'),
(51,1294905096043,'wlEIY3n9uz!p'),(52,1294905404621,'T?qv3H6&hlQD'),
(53,1294905603922,'S@Bhys^Ti7bt'),(54,1294905788416,'KR?a5NVukz#l'),
(55,1294905993190,'A*&q4kWhED!o'),(56,1294906205254,'fT0%7z0DF6h*'),
(57,1294906319680,'LhzdW4?ivjR0'),(58,1294906424296,'h0KDlns%U*6T'),
(59,1294906623844,'b$CfB1noI6Ax'),(60,1294911258896,'#T1*LP!3$Oys');
INSERT INTO t2 VALUES
(1,1,0,10209),(1,42480,1,10209),(1,61612,1,10209),(1,257545,1,10209),
(1,385332,1,10209),(1,1687999,1,10209),(3,1,0,10210),(3,617411,2,10210),
(4,11,0,14),(4,95149,1,10211),(4,607890,2,10211),(5,1,0,10212),
(6,1,0,10213),(6,93344,1,10213),(6,295578,1,10213),(6,295579,1,10213),
(6,295644,1,10213),(7,1,0,10214),(7,12,1,7),(7,688796,1,10214),
(7,1140433,1,10214),(7,1715227,1,10214),(8,1,0,10215),(8,74253,1,10215),
(8,93345,1,10215),(8,12,2,2),(9,1,0,10216),(9,93342,1,10216),
(9,122354,1,10216),(9,301499,2,10216),(10,11,0,5),(10,93343,1,10217),
(10,122355,1,10217),(10,123050,1,10217),(10,301500,2,10217),(11,1,0,10218),
(11,87852,1,10218),(11,605499,2,10218),(12,1,0,10219),(12,88024,1,10219),
(12,605892,2,10219),(13,1,0,10220);
INSERT INTO t3 VALUES
(1,1,300003),(1,117548,NULL),(2,1,300003),(2,117548,300006),
(3,1,300153),(3,117548,NULL),(4,1,300153),(4,117548,NULL),
(5,1,300153),(5,117548,NULL),(6,1,300182),(6,117548,NULL),
(7,1,300205),(7,117548,NULL),(8,1,300217),(8,117548,NULL),
(9,1,300290),(9,117548,NULL),(10,1,300290),(10,117548,NULL),
(11,1,300405),(11,117548,NULL),(12,1,300670),(12,117548,NULL),
(13,1,300670),(13,117548,NULL),(14,1,300006),(14,117548,NULL),
(15,1,300671),(15,117548,NULL),(16,1,300732),(16,117548,NULL);
INSERT INTO t4 VALUES
(300000,1),(300001,1),(300003,1),(300004,1),
(300005,1),(300005,688796),(300006,1),(300006,97697),
(300009,1),(300010,1),(300011,1),(300012,1),(300013,1),
(300014,1),(300015,1),(300016,1),(300017,1),(300018,1),
(300019,1),(300020,1),(300021,1),(300022,1),(300023,1),
(300024,1),(300025,1),(300026,1),(300027,1),(300028,1);
# This should have join order of t2,t3,t4,t1
EXPLAIN EXTENDED SELECT *
FROM t1 INNER JOIN t2 ON t2.REV=t1.id
INNER JOIN t3 ON t3.id=t2.profile_id
INNER JOIN t4 ON t4.id=t3.person_id
WHERE t1.timestamp < 1294664900039 AND t1.timestamp > 1294644616416 AND
t2.REVTYPE=2;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 42 100.00 Using where
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.REV 1 100.00 Using where
1 SIMPLE t3 ref PRIMARY PRIMARY 4 test.t2.profile_id 1 100.00 Using where
1 SIMPLE t4 ref PRIMARY PRIMARY 4 test.t3.person_id 1 100.00 Using index
Warnings:
Note 1003 select `test`.`t1`.`id` AS `id`,`test`.`t1`.`timestamp` AS `timestamp`,`test`.`t1`.`modifiedBy` AS `modifiedBy`,`test`.`t2`.`id` AS `id`,`test`.`t2`.`REV` AS `REV`,`test`.`t2`.`REVTYPE` AS `REVTYPE`,`test`.`t2`.`profile_id` AS `profile_id`,`test`.`t3`.`id` AS `id`,`test`.`t3`.`REV` AS `REV`,`test`.`t3`.`person_id` AS `person_id`,`test`.`t4`.`id` AS `id`,`test`.`t4`.`REV` AS `REV` from `test`.`t1` join `test`.`t2` join `test`.`t3` join `test`.`t4` where `test`.`t2`.`REVTYPE` = 2 and `test`.`t4`.`id` = `test`.`t3`.`person_id` and `test`.`t3`.`id` = `test`.`t2`.`profile_id` and `test`.`t1`.`id` = `test`.`t2`.`REV` and `test`.`t1`.`timestamp` < 1294664900039 and `test`.`t1`.`timestamp` > 1294644616416
SELECT *
FROM t1 INNER JOIN t2 ON t2.REV=t1.id
INNER JOIN t3 ON t3.id=t2.profile_id
INNER JOIN t4 ON t4.id=t3.person_id
WHERE t1.timestamp < 1294664900039 AND t1.timestamp > 1294644616416 AND
t2.REVTYPE=2;
id timestamp modifiedBy id REV REVTYPE profile_id id REV person_id id REV
12 1294650860266 u62C^Kzx3wH8 8 12 2 2 2 1 300003 300003 1
12 1294650860266 u62C^Kzx3wH8 8 12 2 2 2 117548 300006 300006 1
12 1294650860266 u62C^Kzx3wH8 8 12 2 2 2 117548 300006 300006 97697
# This should have join order of t2,t3,t4,t1 with the same plan as above
# because all RIGHT JOIN operations are converted into INNER JOIN
EXPLAIN EXTENDED SELECT *
FROM t1 RIGHT JOIN t2 ON t2.REV=t1.id
RIGHT JOIN t3 ON t3.id=t2.profile_id
RIGHT JOIN t4 ON t4.id=t3.person_id
WHERE t1.timestamp < 1294664900039 AND t1.timestamp > 1294644616416
AND t2.REVTYPE=2;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 42 100.00 Using where
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.REV 1 100.00 Using where
1 SIMPLE t3 ref PRIMARY PRIMARY 4 test.t2.profile_id 1 100.00 Using where
1 SIMPLE t4 ref PRIMARY PRIMARY 4 test.t3.person_id 1 100.00 Using index
Warnings:
Note 1003 select `test`.`t1`.`id` AS `id`,`test`.`t1`.`timestamp` AS `timestamp`,`test`.`t1`.`modifiedBy` AS `modifiedBy`,`test`.`t2`.`id` AS `id`,`test`.`t2`.`REV` AS `REV`,`test`.`t2`.`REVTYPE` AS `REVTYPE`,`test`.`t2`.`profile_id` AS `profile_id`,`test`.`t3`.`id` AS `id`,`test`.`t3`.`REV` AS `REV`,`test`.`t3`.`person_id` AS `person_id`,`test`.`t4`.`id` AS `id`,`test`.`t4`.`REV` AS `REV` from `test`.`t4` join `test`.`t3` join `test`.`t2` join `test`.`t1` where `test`.`t2`.`REVTYPE` = 2 and `test`.`t1`.`id` = `test`.`t2`.`REV` and `test`.`t3`.`id` = `test`.`t2`.`profile_id` and `test`.`t4`.`id` = `test`.`t3`.`person_id` and `test`.`t1`.`timestamp` < 1294664900039 and `test`.`t1`.`timestamp` > 1294644616416
SELECT *
FROM t1 RIGHT JOIN t2 ON t2.REV=t1.id
RIGHT JOIN t3 ON t3.id=t2.profile_id
RIGHT JOIN t4 ON t4.id=t3.person_id
WHERE t1.timestamp < 1294664900039 AND t1.timestamp > 1294644616416
AND t2.REVTYPE=2;
id timestamp modifiedBy id REV REVTYPE profile_id id REV person_id id REV
12 1294650860266 u62C^Kzx3wH8 8 12 2 2 2 1 300003 300003 1
12 1294650860266 u62C^Kzx3wH8 8 12 2 2 2 117548 300006 300006 1
12 1294650860266 u62C^Kzx3wH8 8 12 2 2 2 117548 300006 300006 97697
DROP TABLE t1,t2,t3,t4;
# end of 10.1 tests
#
# MDEV-25362: name resolution for subqueries in ON expressions
#
create table t1 (a int, b int);
create table t2 (c int, d int);
create table t3 (e int, f int);
create table t4 (g int, h int);
explain
select *
from
t1 left join
(t2
join
t3 on
(t3.f=t1.a)
) on (t2.c=t1.a );
ERROR 42S22: Unknown column 't1.a' in 'ON'
explain
select *
from
t1 left join
(t2
join
t3 on
(t3.f=(select max(g) from t4 where t4.h=t1.a))
) on (t2.c=t1.a );
ERROR 42S22: Unknown column 't1.a' in 'WHERE'
drop table t1,t2,t3,t4;
create table t1 (a int);
insert into t1 values (1),(2);
create table t2 (b int);
insert into t2 values (1),(2);
create table t3 (c int);
insert into t3 values (1),(2);
select * from ( select * from t1 left join t2
on b in (select x from t3 as sq1)
) as sq2;
ERROR 42S22: Unknown column 'x' in 'SELECT'
drop table t1,t2,t3;
# end of 10.2 tests
#
# MDEV-22866: Crash in join optimizer with constant outer join nest
#
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (3),(4);
CREATE TABLE t3 (c INT, KEY(c)) ENGINE=MyISAM;
CREATE TABLE t4 (d INT, KEY(d)) ENGINE=MyISAM;
INSERT INTO t4 VALUES (5),(6);
CREATE TABLE t5 (e INT) ENGINE=MyISAM;
INSERT INTO t5 VALUES (7),(8);
CREATE TABLE t6 (f INT) ENGINE=MyISAM;
INSERT INTO t6 VALUES (9),(10);
SELECT *
FROM
t1
LEFT JOIN (
t2 LEFT JOIN (
t3 JOIN
t4 ON t3.c = t4.d and t3.c >2 and t3.c<0
) ON t2.b >= t4.d
) ON t1.a <= t2.b
LEFT JOIN t5 ON t2.b = t5.e
LEFT JOIN t6 ON t3.c = t6.f;
a b c d e f
1 3 NULL NULL NULL NULL
1 4 NULL NULL NULL NULL
2 3 NULL NULL NULL NULL
2 4 NULL NULL NULL NULL
drop table t1,t2,t3,t4,t5,t6;
#
# MDEV-17518: Range optimization doesn't use ON expressions from nested outer joins
#
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2(a int);
insert into t2 values (0),(1);
create table t3 (a int, b int, key(a));
insert into t3 select A.a + B.a* 10 + C.a * 100, 12345 from t1 A, t1 B, t1 C;
# Uses range for table t3:
explain select * from t1 left join t3 on t1.a=t3.b and t3.a<5;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10
1 SIMPLE t3 range a a 5 NULL 5 Using where
# This must use range for table t3, too:
explain select * from t1 left join (t3 join t2) on t1.a=t3.b and t3.a<5;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10
1 SIMPLE t2 ALL NULL NULL NULL NULL 2
1 SIMPLE t3 range a a 5 NULL 5 Using where
#
# .. part 2: make sure condition selectivity can use the condition too.
#
alter table t3 drop key a;
set @tmp1=@@optimizer_use_condition_selectivity;
set @tmp2=@@use_stat_tables;
set @tmp3=@@histogram_size;
set use_stat_tables=preferably;
set optimizer_use_condition_selectivity=4;
set histogram_size=100;
analyze table t3 persistent for all;
Table Op Msg_type Msg_text
test.t3 analyze status Engine-independent statistics collected
test.t3 analyze status OK
# t3.filtered is less than 100%:
explain extended select * from t1 left join t3 on t1.a=t3.b and t3.a<5;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 100.00
1 SIMPLE t3 ALL NULL NULL NULL NULL 1000 0.50 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t1` left join `test`.`t3` on(`test`.`t3`.`b` = `test`.`t1`.`a` and `test`.`t3`.`a` < 5) where 1
# t3.filtered must less than 100%, too:
explain extended select * from t1 left join (t3 join t2) on t1.a=t3.b and t3.a<5;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t3 ALL NULL NULL NULL NULL 1000 0.50 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t2`.`a` AS `a` from `test`.`t1` left join (`test`.`t3` join `test`.`t2`) on(`test`.`t3`.`b` = `test`.`t1`.`a` and `test`.`t3`.`a` < 5) where 1
drop table t1,t2,t3;
set optimizer_use_condition_selectivity= @tmp1;
set use_stat_tables= @tmp2;
set histogram_size= @tmp3;
# Another test
CREATE TABLE t1 (i1 int) ;
CREATE TABLE t2 (pk int NOT NULL PRIMARY KEY) ;
CREATE TABLE t3 (pk int NOT NULL, i1 int, PRIMARY KEY (pk)) ;
INSERT INTO t3 VALUES (2, NULL);
CREATE TABLE t4 (pk int NOT NULL, i1 int, PRIMARY KEY (pk), KEY i1 (i1)) ;
CREATE VIEW v4 AS SELECT * FROM t4;
SELECT 1
FROM t3 RIGHT JOIN t1 ON t3.i1 = t1.i1
LEFT JOIN v4
RIGHT JOIN t2 ON v4.i1 = t2.pk ON t1.i1 = t2.pk
WHERE t3.pk IN (2);
1
drop view v4;
drop table t1,t2,t3,t4;
#
# MDEV-28602 Wrong result with outer join, merged derived table and view
#
create table t1 (
Election int(10) unsigned NOT NULL
);
insert into t1 (Election) values (1);
create table t2 (
VoteID int(10),
ElectionID int(10),
UserID int(10)
);
insert into t2 (ElectionID, UserID) values (2, 30), (3, 30);
create view v1 as select * from t1
left join ( select 'Y' AS Voted, ElectionID from t2 ) AS T
on T.ElectionID = t1.Election
limit 9;
select * from v1;
Election Voted ElectionID
1 NULL NULL
drop table t1, t2;
drop view v1;
#
# and another contrived example showing a bit of hierarchy
#
create table t10 (a int);
create table t20 (b int);
insert into t10 values (1),(2);
insert into t20 values (1),(3);
create view v10 as select *, 'U' as u from t10 left join (select 'Y' as y, t20.b from t20) dt1 on t10.a= dt1.b limit 3;
create table t30 (c int);
insert into t30 values (1),(3);
create view v20 as select * from t30 left join (select 'X' as x, v10.u, v10.y, v10.b from v10) dt2 on t30.c=dt2.b limit 6;
select * from v20 limit 9;
c x u y b
1 X U Y 1
3 NULL NULL NULL NULL
drop view v10, v20;
drop table t10, t20, t30;
#
# More complex testcase
#
create table t2 (b int);
insert into t2 values (3),(7),(1);
create table t3 (c int);
insert into t3 values (3),(1);
create table t1 (a int);
insert into t1 values (1),(2),(7),(1);
select * from
(
select * from
(select 'Z' as z, t1.a from t1) dt1
left join
(select 'Y' as y, t2.b from t2) dt2
left join
(select 'X' as x, t3.c from t3) dt3
on dt2.b=dt3.c
on dt1.a=dt2.b
limit 9
) dt;
z a y b x c
Z 1 Y 1 X 1
Z 2 NULL NULL NULL NULL
Z 7 Y 7 NULL NULL
Z 1 Y 1 X 1
create view v3(x,c) as select * from (select 'X' as x, t3.c from t3) dt3;
create view v2(y,b) as select * from (select 'Y' as y, t2.b from t2) dt2;
create view v0(y,b,x,c) as select * from v2 left join v3 on v2.b=v3.c;
create view v1 as select 'Z' as z, t1.a, v0.* from t1 left join v0 on t1.a=v0.b limit 9;
select * from v1;
z a y b x c
Z 1 Y 1 X 1
Z 2 NULL NULL NULL NULL
Z 7 Y 7 NULL NULL
Z 1 Y 1 X 1
set statement join_cache_level=0 for
select * from v1;
z a y b x c
Z 1 Y 1 X 1
Z 2 NULL NULL NULL NULL
Z 7 Y 7 NULL NULL
Z 1 Y 1 X 1
drop view v0, v1, v2, v3;
drop table t1, t2, t3;
# end of 10.3 tests
#
# MDEV-37653 Unexpected result of prepared statement when use boolean value as parameters
#
create table t0(c0 real);
create table t1 like t0;
insert into t1 values (1);
insert into t0 values (1);
select t1.c0, t0.c0 from t1 left join t0 on 0 where not (t0.c0 is true);
c0 c0
1 NULL
select t1.c0, t0.c0 from t1 left join t0 on 0 where not (t0.c0 is false);
c0 c0
1 NULL
select t1.c0, t0.c0 from t1 left join t0 on false where (false or ((t0.c0 is true) in (false)));
c0 c0
1 NULL
drop table t0, t1;
# end of 10.11 tests
SET optimizer_switch=@org_optimizer_switch;
set SQL_MODE= oracle;
create table t1 (a int);
insert into t1 values (1),(2),(3);
create table t2 (b int);
insert into t2 values (2),(1),(20);
create table t3 (c int, e int);
insert into t3 values (3,2),(10,3),(2,20);
create table t4 (d int);
insert into t4 values (3),(1),(20);
select t1.a, t4.d, t2.b, t3.c
from t1, t2, t3, t4
where
t1.a = t2.b(+) and
t1.a = t3.c(+) and
t4.d = t2.b(+) and
t4.d = t3.c(+);
a d b c
3 3 NULL 3
1 1 1 NULL
1 3 NULL NULL
2 3 NULL NULL
2 1 NULL NULL
3 1 NULL NULL
1 20 NULL NULL
2 20 NULL NULL
3 20 NULL NULL
explain extended
select t1.a, t4.d, t2.b, t3.c
from t1, t2, t3, t4
where
t1.a = t2.b(+) and
t1.a = t3.c(+) and
t4.d = t2.b(+) and
t4.d = t3.c(+);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t4 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t4"."d" AS "d","test"."t2"."b" AS "b","test"."t3"."c" AS "c" from "test"."t1" join "test"."t4" left join "test"."t2" on("test"."t4"."d" = "test"."t1"."a" and "test"."t2"."b" = "test"."t1"."a") left join "test"."t3" on("test"."t4"."d" = "test"."t1"."a" and "test"."t3"."c" = "test"."t1"."a") where 1
select t1.a, t4.d, t2.b, t3.c
from t4, t3, t2, t1
where
t1.a = t2.b(+) and
t1.a = t3.c(+) and
t4.d = t2.b(+) and
t4.d = t3.c(+);
a d b c
1 1 1 NULL
3 3 NULL 3
1 3 NULL NULL
1 20 NULL NULL
2 3 NULL NULL
2 1 NULL NULL
2 20 NULL NULL
3 1 NULL NULL
3 20 NULL NULL
explain extended
select t1.a, t4.d, t2.b, t3.c
from t4, t3, t2, t1
where
t1.a = t2.b(+) and
t1.a = t3.c(+) and
t4.d = t2.b(+) and
t4.d = t3.c(+);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t4 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t4"."d" AS "d","test"."t2"."b" AS "b","test"."t3"."c" AS "c" from "test"."t4" join "test"."t1" left join "test"."t3" on("test"."t1"."a" = "test"."t4"."d" and "test"."t3"."c" = "test"."t4"."d") left join "test"."t2" on("test"."t1"."a" = "test"."t4"."d" and "test"."t2"."b" = "test"."t4"."d") where 1
select t1.a, t4.d, t2.b, t3.c
from t2, t1, t4, t3
where
t1.a = t2.b(+) and
t1.a = t3.c(+) and
t4.d = t2.b(+) and
t4.d = t3.c(+);
a d b c
3 3 NULL 3
1 1 1 NULL
1 3 NULL NULL
2 3 NULL NULL
2 1 NULL NULL
3 1 NULL NULL
1 20 NULL NULL
2 20 NULL NULL
3 20 NULL NULL
explain extended
select t1.a, t4.d, t2.b, t3.c
from t2, t1, t4, t3
where
t1.a = t2.b(+) and
t1.a = t3.c(+) and
t4.d = t2.b(+) and
t4.d = t3.c(+);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t4 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t4"."d" AS "d","test"."t2"."b" AS "b","test"."t3"."c" AS "c" from "test"."t1" join "test"."t4" left join "test"."t2" on("test"."t4"."d" = "test"."t1"."a" and "test"."t2"."b" = "test"."t1"."a") left join "test"."t3" on("test"."t4"."d" = "test"."t1"."a" and "test"."t3"."c" = "test"."t1"."a") where 1
select t1.a, t4.d, t2.b, t3.c
from t3, t4, t1, t2
where
t1.a = t2.b(+) and
t1.a = t3.c(+) and
t4.d = t2.b(+) and
t4.d = t3.c(+);
a d b c
1 1 1 NULL
3 3 NULL 3
1 3 NULL NULL
1 20 NULL NULL
2 3 NULL NULL
2 1 NULL NULL
2 20 NULL NULL
3 1 NULL NULL
3 20 NULL NULL
explain extended
select t1.a, t4.d, t2.b, t3.c
from t3, t4, t1, t2
where
t1.a = t2.b(+) and
t1.a = t3.c(+) and
t4.d = t2.b(+) and
t4.d = t3.c(+);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t4 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t4"."d" AS "d","test"."t2"."b" AS "b","test"."t3"."c" AS "c" from "test"."t4" join "test"."t1" left join "test"."t3" on("test"."t1"."a" = "test"."t4"."d" and "test"."t3"."c" = "test"."t4"."d") left join "test"."t2" on("test"."t1"."a" = "test"."t4"."d" and "test"."t2"."b" = "test"."t4"."d") where 1
drop table t1, t2, t3, t4;
#
# tests of Iqbal Hassan <iqbal@hasprime.com>
# (with 2 fixes)
#
CREATE TABLE tj1(a int, b int);
CREATE TABLE tj2(c int, d int);
CREATE TABLE tj3(e int, f int);
CREATE TABLE tj4(b int, c int);
INSERT INTO tj1 VALUES (1, 1);
INSERT INTO tj1 VALUES (2, 2);
INSERT INTO tj2 VALUES (2, 3);
INSERT INTO tj3 VALUES (1, 4);
#
# Basic test
#
SELECT * FROM tj1,tj2 WHERE tj1.a = tj2.c(+);
a b c d
2 2 2 3
1 1 NULL NULL
#
# Compare marked with literal
#
SELECT * FROM tj1,tj2 WHERE tj1.a = tj2.c(+) AND tj2.d(+) > 4;
a b c d
1 1 NULL NULL
2 2 NULL NULL
explain extended
SELECT * FROM tj1,tj2 WHERE tj1.a = tj2.c(+) AND tj2.d(+) > 4;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE tj1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE tj2 ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."tj1"."a" AS "a","test"."tj1"."b" AS "b","test"."tj2"."c" AS "c","test"."tj2"."d" AS "d" from "test"."tj1" left join "test"."tj2" on("test"."tj2"."c" = "test"."tj1"."a" and "test"."tj2"."d" > 4) where 1
#
# Use both marked and unmarked field in the same condition
#
SELECT * FROM tj1,tj2 WHERE tj1.a = tj2.c(+) AND tj2.d = 3;
a b c d
2 2 2 3
#
# Use both marked and unmarked field in OR condition
#
SELECT * FROM tj2,tj1 WHERE tj1.a = tj2.c(+) OR tj2.d=4;
ERROR HY000: Invalid usage of (+) operator: cycle dependencies
SELECT * FROM tj1,tj2,tj3 WHERE tj1.a = tj3.e(+) AND (tj1.a = tj2.c(+) OR tj2.d=4);
ERROR HY000: Invalid usage of (+) operator: cycle dependencies
#
# Use unmarked fields in OR condition
#
SELECT * FROM tj2,tj1 WHERE tj1.a = tj2.c(+) AND (tj2.d=3 OR tj2.d * 2=3);
c d a b
2 3 2 2
#
# Use marked fields in OR condition when all fields are marked
#
SELECT * FROM tj1,tj2 WHERE tj1.a = tj2.c(+) AND (tj2.d(+)=3 OR tj2.c(+)=1);
a b c d
2 2 2 3
1 1 NULL NULL
#
# Use more than one marked table per condition
#
SELECT * FROM tj1,tj2,tj3 WHERE tj1.a = tj2.c(+) + tj3.e(+);
ERROR HY000: Invalid usage of (+) operator: both tables tj2 and tj3 are of INNER type in the relation
#
# Use different tables per `AND` operand
#
SELECT * FROM tj1,tj2,tj3 WHERE tj1.a = tj2.c(+) AND tj1.a = tj3.e(+);
a b c d e f
1 1 NULL NULL 1 4
2 2 2 3 NULL NULL
#
# Ensure table dependencies are properly resolved
#
SELECT * FROM tj1,tj2,tj3 WHERE tj1.a = tj3.e AND tj1.a + 1 = tj2.c(+);
a b c d e f
1 1 2 3 1 4
SELECT * FROM tj1,tj2,tj3 WHERE tj1.a = tj2.c(+) AND tj2.c = tj3.e(+) + 1;
a b c d e f
2 2 2 3 1 4
1 1 NULL NULL NULL NULL
SELECT * FROM tj1, tj2, tj3 WHERE tj1.a + tj3.e = tj2.c(+);
a b c d e f
1 1 2 3 1 4
2 2 NULL NULL 1 4
#
# Cyclic dependency of tables
# ORA-01416 two tables cannot be outer-joined to each other
#
SELECT * FROM tj1,tj2,tj3 WHERE tj1.a = tj2.c(+) AND tj2.c = tj3.e(+) + 1 AND tj3.e = tj1.a(+);
ERROR HY000: Invalid usage of (+) operator: cycle dependencies
#
# Table not referenced in where condition (must be cross-joined)
#
SELECT * FROM tj1, tj2, tj3 WHERE tj1.a + 1 = tj2.c(+);
a b c d e f
1 1 2 3 1 4
2 2 NULL NULL 1 4
#
# Alias
#
SELECT * FROM tj1, tj2 b WHERE tj1.a + 1 = b.c(+);
a b c d
1 1 2 3
2 2 NULL NULL
#
# Subselect
#
SELECT * FROM tj1, (SELECT * from tj2) b WHERE tj1.a + 1 = b.c(+);
a b c d
1 1 2 3
2 2 NULL NULL
SELECT * FROM tj1, (SELECT * FROM tj1, tj2 d WHERE tj1.a = d.c(+)) b WHERE tj1.a + 1 = b.c(+);
a b a b c d
1 1 2 2 2 3
2 2 NULL NULL NULL NULL
#
# Single table
#
SELECT * FROM tj1 WHERE tj1.a(+) = 1;
a b
1 1
Warnings:
Warning 4237 Oracle outer join operator (+) ignored in '"test"."tj1"."a" = 1'
#
# Self outer join
#
SELECT * FROM tj1 a, tj1 b WHERE a.a + 1 = b.a(+);
a b a b
1 1 2 2
2 2 NULL NULL
#
# Self outer join without alias
#
SELECT * FROM tj1, tj2 WHERE tj1.a + 1 = tj1.a(+);
ERROR HY000: Invalid usage of (+) operator: cycle dependencies
#
# Outer join condition is independent of other tables
# In this case we need to restrict the marked table(s) to appear
# after the unmarked table(s) during topological sort. This test
# ensures that the topological sort is working correctly.
#
# correct result in is empty result set (tj2.c = 1 filters all out)
SELECT * FROM tj1, tj2 WHERE tj2.c(+) = 1;
a b c d
Warnings:
Warning 4237 Oracle outer join operator (+) ignored in '"test"."tj2"."c" = 1'
# one row (there is tj1.a = 1)
SELECT * FROM tj1, tj2 WHERE tj1.a(+) = 1;
a b c d
1 1 2 3
Warnings:
Warning 4237 Oracle outer join operator (+) ignored in '"test"."tj1"."a" = 1'
#
# Outer join in 'IN' condition
# ORA-01719
#
SELECT * FROM tj1, tj2 WHERE tj1.a IN (tj2.c(+), tj2.d(+));
ERROR HY000: Invalid usage of (+) operator: used in OR, IN or ROW operation
SELECT * FROM tj1, tj2 WHERE tj1.a NOT IN (tj2.c(+), tj2.d(+));
ERROR HY000: Invalid usage of (+) operator: used in OR, IN or ROW operation
#
# Outer join in 'IN' condition with a single expression
# This is also allowed in oracle since the expression is
# can be simplified to 'equal' or 'not equal' condition
#
SELECT * FROM tj1, tj2 WHERE tj1.a IN (tj2.c(+));
a b c d
2 2 2 3
1 1 NULL NULL
SELECT * FROM tj1, tj2 WHERE tj1.a NOT IN (tj2.c(+));
a b c d
1 1 2 3
2 2 NULL NULL
#
# Oracle outer join not in WHERE clause
#
SELECT * FROM tj1, tj2 WHERE tj1.a = tj2.c GROUP BY tj2.c(+);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')' at line 1
SELECT * FROM tj1, tj2 WHERE tj1.a = tj2.c GROUP BY tj2.c HAVING tj2.c(+) > 1;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ') > 1' at line 1
SELECT * FROM tj1, tj2 WHERE tj1.a = tj2.c ORDER BY tj2.c(+);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')' at line 1
SELECT tj2.c(+) FROM tj2;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ') FROM tj2' at line 1
#
# Mix ANSI and Oracle outer join
# ORA-25156
SELECT * FROM tj1 LEFT JOIN tj2 ON tj2.c = 1 WHERE tj1.a = tj2.c(+);
ERROR HY000: Invalid usage of (+) operator: mixed with other type of join
SELECT * FROM tj1 INNER JOIN tj2 ON tj2.c = 1 WHERE tj1.a = tj2.c(+);
ERROR HY000: Invalid usage of (+) operator: mixed with other type of join
SELECT * FROM tj1 NATURAL JOIN tj2 WHERE tj1.a = tj2.c(+);
ERROR HY000: Invalid usage of (+) operator: mixed with other type of join
#
# View with oracle outer join
#
CREATE VIEW v1 AS SELECT * FROM tj1, tj2 WHERE tj1.a = tj2.c(+);
SELECT * FROM v1;
a b c d
2 2 2 3
1 1 NULL NULL
#
# Cursor with oracle outer join
#
DECLARE
CURSOR c1 IS SELECT * FROM tj1, tj2 WHERE tj1.a = tj2.c(+);
BEGIN
FOR r1 IN c1 LOOP
SELECT r1.a || ' ' || r1.c;
END LOOP;
END
$$
r1.a || ' ' || r1.c
2 2
r1.a || ' ' || r1.c
1
#
# Marking ROW type
#
DECLARE
v1 ROW (a INT, b INT);
BEGIN
SELECT * FROM tj1 WHERE tj1.a = v1.a(+);
END
$$
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ');
END' at line 4
#
# Unspecified table used in WHERE clause that contains (+)
#
SELECT * FROM tj1, tj2 WHERE tj1.a = tj3.c(+);
ERROR 42S22: Unknown column 'tj3.c' in 'WHERE'
#
# '.' prefixed table name
#
SELECT * FROM tj1, tj2 WHERE tj1.a = .tj2.c(+);
a b c d
2 2 2 3
1 1 NULL NULL
CREATE DATABASE db1;
USE db1;
CREATE TABLE tj1(a int, b int);
INSERT INTO tj1 VALUES (3, 3);
INSERT INTO tj1 VALUES (4, 4);
#
# DB qualifed ident with oracle outer join (aliased)
#
SELECT * FROM test.tj2 a, tj1 WHERE a.c(+) = tj1.a - 1;
c d a b
2 3 3 3
NULL NULL 4 4
#
# DB qualifed ident with oracle outer join (non-aliased)
#
SELECT * FROM test.tj2, tj1 WHERE test.tj2.c(+) = tj1.a - 1;
c d a b
2 3 3 3
NULL NULL 4 4
#
# DB qualifed ident with oracle outer join (aliased but use table name)
#
SELECT * FROM test.tj2 a, tj1 WHERE test.tj2.c(+) = tj1.a - 1;
ERROR 42S22: Unknown column 'test.tj2.c' in 'WHERE'
USE test;
#
# UPDATE with oracle outer join
#
UPDATE tj1, tj2 SET tj1.a = tj2.c WHERE tj1.a = tj2.c(+);
SELECT * FROM tj1;
a b
NULL 1
2 2
#
# DELETE with oracle outer join
#
DELETE tj1 FROM tj1, tj2 WHERE tj1.b(+) = tj2.c;
SELECT * FROM tj1;
a b
NULL 1
DROP DATABASE db1;
DROP VIEW v1;
DROP TABLE tj4;
DROP TABLE tj3;
DROP TABLE tj2;
DROP TABLE tj1;
#
# End of iqbal-rsec tests
#
#
# Test from the MDEV comments
#
create table t1 (a int);
insert into t1 values (1),(2),(3);
create table t2 (b int);
insert into t2 values (2),(1),(20);
create table t3 (c int, e int);
insert into t3 values (3,2),(10,3),(2,20);
create table t4 (d int);
insert into t4 values (3),(1),(20);
select t1.a, t4.d, t2.b, t3.c from t1, t2, t3, t4 where t1.a = t2.b(+) and t1.a = t3.c(+) and t4.d = t2.b(+) and t4.d = t3.c(+);
a d b c
3 3 NULL 3
1 1 1 NULL
1 3 NULL NULL
2 3 NULL NULL
2 1 NULL NULL
3 1 NULL NULL
1 20 NULL NULL
2 20 NULL NULL
3 20 NULL NULL
select t1.a, t4.d, t2.b, t3.c from t1, t2, t3, t4 where t1.a + t3.c = t2.b(+) and t1.a = t3.c(+) and t4.d = t2.b(+) and t4.d = t3.c(+);
a d b c
3 3 NULL 3
1 3 NULL NULL
2 3 NULL NULL
1 1 NULL NULL
2 1 NULL NULL
3 1 NULL NULL
1 20 NULL NULL
2 20 NULL NULL
3 20 NULL NULL
select t1.a, t4.d, t2.b, t3.c from t1, t2, t3, t4 where (t2.b(+) in (t1.a, t1.a+1)) and t1.a = t3.c(+) and t4.d = t2.b(+) and t4.d = t3.c(+);
a d b c
3 3 NULL 3
1 1 1 NULL
1 3 NULL NULL
2 3 NULL NULL
2 1 NULL NULL
3 1 NULL NULL
1 20 NULL NULL
2 20 NULL NULL
3 20 NULL NULL
drop tables t1, t2, t3, t4;
create table t1 (a int);
insert into t1 values (1),(2),(3);
create table t2 (b int);
insert into t2 values (2),(1),(20);
create table t3 (c int, f int);
insert into t3 values (3,2),(10,3),(2,20);
create table t4 (d int);
insert into t4 values (3),(1),(20);
create table t5 (e int);
insert into t5 values (3),(2),(20);
select t1.a, t2.b, t3.c, t4.d, t5.e from t1, t2, t3, t4, t5 where t1.a = t2.b(+) and t2.b = t3.c(+) and t1.a = t4.d(+) and t4.d=t5.e(+) and t3.c=t5.e(+);
a b c d e
1 1 NULL 1 NULL
2 2 2 NULL NULL
3 NULL NULL 3 NULL
select t1.a, t2.b, t3.c, t4.d, t5.e from t1, t2, t3, t4, t5 where t1.a = t2.b(+) and t2.b = t3.c(+) and t1.a = t4.d(+) and t4.d=t5.e(+) and 1=t5.e(+);
a b c d e
3 NULL NULL 3 NULL
1 1 NULL 1 NULL
2 2 2 NULL NULL
select t1.a, t2.b, t3.c, t4.d, t5.e from t1, t2, t3, t4, t5 where t1.a = t2.b(+) and t2.b = t3.c(+) and t1.a = t4.d(+) and t4.d=t5.e(+) and 3=t5.e(+);
a b c d e
3 NULL NULL 3 3
1 1 NULL 1 NULL
2 2 2 NULL NULL
select t1.a, t2.b, t3.c, t4.d, t5.e from t1, (t2, t3), t4, t5 where t1.a = t2.b(+) and t2.b = t3.c(+) and t1.a = t4.d(+) and t4.d=t5.e(+) and 3=t5.e(+);
ERROR HY000: Invalid usage of (+) operator: mixed with other type of join
drop tables t1, t2, t3, t4, t5;
create table t1 (a int);
insert into t1 values (1),(2),(3);
create table t2 (b int);
insert into t2 values (2),(1),(20);
select t1.a, t2.b from t1, t2 where 1 = t2.b(+);
a b
1 1
2 1
3 1
Warnings:
Warning 4237 Oracle outer join operator (+) ignored in '1 = "test"."t2"."b"'
select t1.a, t2.b from t2, t1 where 1 = t2.b(+);
a b
1 1
2 1
3 1
Warnings:
Warning 4237 Oracle outer join operator (+) ignored in '1 = "test"."t2"."b"'
select t1.a,t2.b from t2,t1 where t2.b(+) in (1,2);
a b
1 2
1 1
2 2
2 1
3 2
3 1
Warnings:
Warning 4237 Oracle outer join operator (+) ignored in '"test"."t2"."b" in (1,2)'
select t2.b from t2 where 1 = t2.b(+);
b
1
Warnings:
Warning 4237 Oracle outer join operator (+) ignored in '1 = "test"."t2"."b"'
drop tables t1, t2;
create table t1 (a int);
insert into t1 values (1),(2),(4),(5),(20),(21),(23);
create table t2 (b int);
insert into t2 values (1),(4),(6),(7),(8),(23);
create table t3 (c int);
insert into t3 values (4),(7),(9),(4),(6),(10),(11),(1);
create table t4 (d int);
insert into t4 values (1),(4),(10),(12),(20),(21),(23);
SELECT * FROM t1,t2,t3,t4 WHERE t1.a = t2.b(+) AND t1.a = t3.c(+) AND t2.b=t4.d(+) AND t3.c=t4.d(+);
a b c d
1 1 1 1
4 4 4 4
4 4 4 4
23 23 NULL NULL
2 NULL NULL NULL
5 NULL NULL NULL
20 NULL NULL NULL
21 NULL NULL NULL
select * from t1, t2, t3 where (t1.a + t2.b = t3.c(+));
a b c
1 6 7
1 8 9
2 7 9
5 4 9
2 4 6
5 1 6
2 8 10
4 6 10
4 7 11
5 6 11
1 1 NULL
1 4 NULL
1 7 NULL
1 23 NULL
2 1 NULL
2 6 NULL
2 23 NULL
4 1 NULL
4 4 NULL
4 8 NULL
4 23 NULL
5 7 NULL
5 8 NULL
5 23 NULL
20 1 NULL
20 4 NULL
20 6 NULL
20 7 NULL
20 8 NULL
20 23 NULL
21 1 NULL
21 4 NULL
21 6 NULL
21 7 NULL
21 8 NULL
21 23 NULL
23 1 NULL
23 4 NULL
23 6 NULL
23 7 NULL
23 8 NULL
23 23 NULL
# no tables mentioned
select * from t2, t3 where b = c(+);
b c
4 4
7 7
4 4
6 6
1 1
8 NULL
23 NULL
# should be the same as above
select * from t2, t3 where t2.b = t3.c(+);
b c
4 4
7 7
4 4
6 6
1 1
8 NULL
23 NULL
drop tables t1, t2, t3, t4;
#
# View creation and usage
#
create table t1 (a int);
insert into t1 values (1),(2),(3);
create table t2 (b int);
insert into t2 values (2),(1),(20);
create view v1 as
select t1.a, t2.b from t1, t2 where t1.a = t2.b(+);
show create view v1;
View Create View character_set_client collation_connection
v1 CREATE VIEW "v1" AS select "t1"."a" AS "a","t2"."b" AS "b" from ("t1" left join "t2" on("t1"."a" = "t2"."b")) latin1 latin1_swedish_ci
select * from v1;
a b
2 2
1 1
3 NULL
select t1.a, t2.b from t1, t2 where t1.a = t2.b(+);
a b
2 2
1 1
3 NULL
usage without oracle sql mode
set SQL_MODE= '';
select * from v1;
a b
2 2
1 1
3 NULL
select t1.a, t2.b from t1, t2 where t1.a = t2.b(+);
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')' at line 1
set SQL_MODE= oracle;
drop view v1;
drop table t1,t2;
#
# MDEV-36830: Oracle outer join syntax (+): outer join not converted to inner
#
create table t1 (
a int not null,
b int not null
);
insert into t1 select seq,seq from seq_1_to_10;
create table t2 (
a int not null,
b int not null
);
insert into t2 select seq,seq from seq_1_to_3;
# Must be converted to inner join:
explain extended
select * from t1, t2
where
t1.a=1 and
t1.b=t2.b(+) and
t2.b=1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."b" AS "b","test"."t2"."a" AS "a","test"."t2"."b" AS "b" from "test"."t1" join "test"."t2" where "test"."t1"."a" = 1 and "test"."t2"."b" = 1 and "test"."t1"."b" = 1
drop table t1,t2;
#
# MDEV-36838: Oracle outer join syntax (+): server crash on derived tables
#
select a.a
from (select 1 as a) a,
(select 2 as b) b
where a.a=b.b(+);
a
1
#
# MDEV-36866: Oracle outer join syntax (+): query with checking for
# null of non-null column uses wrong query plan and returns wrong
# result
#
create table t1 (a int default NULL);
create table t2 (a int not null);
insert into t1 values (1), (2), (3), (4), (5), (6), (NULL);
insert into t2 values (1), (4), (5), (6), (7);
select t1.*,t2.* from t1,t2 where t1.a=t2.a and isnull(t2.a)=1;
a a
explain select t1.*,t2.* from t1,t2 where t1.a=t2.a and isnull(t2.a)=1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
select t1.*,t2.* from t1 left join t2 on t1.a=t2.a where isnull(t2.a)=1;
a a
2 NULL
3 NULL
NULL NULL
explain select t1.*,t2.* from t1 left join t2 on t1.a=t2.a where isnull(t2.a)=1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7
1 SIMPLE t2 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
select t1.*,t2.* from t1,t2 where t1.a=t2.a(+) and isnull(t2.a)=1;
a a
2 NULL
3 NULL
NULL NULL
explain extended select t1.*,t2.* from t1,t2 where t1.a=t2.a(+) and isnull(t2.a)=1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t2"."a" AS "a" from "test"."t1" left join "test"."t2" on("test"."t2"."a" = "test"."t1"."a") where "test"."t2"."a" is null = 1
drop table t1,t2;
#
# Correct nullability test
#
create table t1 (a int not null, s varchar(10) not null);
create table t2 (a int not null, s varchar(10) not null);
insert into t1 values (1, 'one');
insert into t1 values (2, 'two');
insert into t2 values (2, 'two');
insert into t2 values (3, 'three');
explain extended
select * from t1,t2 where t1.a = t2.a (+) and
isnull(t2.a);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Not exists; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."s" AS "s","test"."t2"."a" AS "a","test"."t2"."s" AS "s" from "test"."t1" left join "test"."t2" on("test"."t2"."a" = "test"."t1"."a") where "test"."t2"."a" is null
explain extended
select * from t1,t2 where t1.a = t2.a (+) and
isnull(t1.a+t2.a);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."s" AS "s","test"."t2"."a" AS "a","test"."t2"."s" AS "s" from "test"."t1" left join "test"."t2" on("test"."t2"."a" = "test"."t1"."a") where "test"."t1"."a" + "test"."t2"."a" is null
explain extended
select * from t1,t2 where t1.a = t2.a (+) and
isnull(coalesce(t2.s, 'null'));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."s" AS "s","test"."t2"."a" AS "a","test"."t2"."s" AS "s" from "test"."t1" left join "test"."t2" on(multiple equal("test"."t1"."a", "test"."t2"."a")) where 0
explain extended
select * from t1,t2 where t1.a = t2.a (+) and
isnull(ifnull(t2.s, 'null'));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."s" AS "s","test"."t2"."a" AS "a","test"."t2"."s" AS "s" from "test"."t1" left join "test"."t2" on(multiple equal("test"."t1"."a", "test"."t2"."a")) where 0
explain extended
select * from t1,t2 where t1.a = t2.a (+) and
isnull(coalesce(t2.s, null));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."s" AS "s","test"."t2"."a" AS "a","test"."t2"."s" AS "s" from "test"."t1" left join "test"."t2" on("test"."t2"."a" = "test"."t1"."a") where coalesce("test"."t2"."s",NULL) is null
explain extended
select * from t1,t2 where t1.a = t2.a (+) and
isnull(ifnull(t2.s, null));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."s" AS "s","test"."t2"."a" AS "a","test"."t2"."s" AS "s" from "test"."t1" left join "test"."t2" on("test"."t2"."a" = "test"."t1"."a") where ifnull("test"."t2"."s",NULL) is null
# Our optimizer does not optimize out never-null-subselects under
# isnull() so we do not test it. The following test is to make
# sure that nullable one stay in the WHERE.
explain extended
select * from t1,t2 where t1.a = t2.a (+) and
isnull(t2.a in (select a from t1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 2 100.00
Warnings:
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."s" AS "s","test"."t2"."a" AS "a","test"."t2"."s" AS "s" from "test"."t1" left join "test"."t2" on("test"."t2"."a" = "test"."t1"."a") where <expr_cache><"test"."t2"."a">(<in_optimizer>("test"."t2"."a","test"."t2"."a" in ( <materialize> (/* select#2 */ select "test"."t1"."a" from "test"."t1" ), <primary_index_lookup>("test"."t2"."a" in <temporary table> on distinct_key where "test"."t2"."a" = "<subquery2>"."a")))) is null
explain extended
select * from t1,t2 where t1.a = t2.a (+) and
isnull(t2.a in (1, 2, 3));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."s" AS "s","test"."t2"."a" AS "a","test"."t2"."s" AS "s" from "test"."t1" left join "test"."t2" on("test"."t2"."a" = "test"."t1"."a") where "test"."t2"."a" in (1,2,3) is null
explain extended
select * from t1,t2 where t1.a = t2.a (+) and
isnull(t1.a in (1, 2, 3));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."s" AS "s","test"."t2"."a" AS "a","test"."t2"."s" AS "s" from "test"."t1" left join "test"."t2" on(multiple equal("test"."t1"."a", "test"."t2"."a")) where 0
explain extended
select * from t1,t2 where t1.a = t2.a (+) and
isnull(isnull(t2.a));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."s" AS "s","test"."t2"."a" AS "a","test"."t2"."s" AS "s" from "test"."t1" left join "test"."t2" on(multiple equal("test"."t1"."a", "test"."t2"."a")) where 0
explain extended
select * from t1,t2 where t1.a = t2.a (+) and
isnull(field(t2.a, 2, 23));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."s" AS "s","test"."t2"."a" AS "a","test"."t2"."s" AS "s" from "test"."t1" left join "test"."t2" on(multiple equal("test"."t1"."a", "test"."t2"."a")) where 0
explain extended
select * from t1,t2 where t1.a = t2.a (+) and
isnull(benchmark(10, t2.a));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."s" AS "s","test"."t2"."a" AS "a","test"."t2"."s" AS "s" from "test"."t1" left join "test"."t2" on(multiple equal("test"."t1"."a", "test"."t2"."a")) where 0
drop table t1, t2;
#
# MDEV-36895: Oracle outer join syntax (+): some NULLs missing from
# result of the query with derived tables and limit
#
create table t2 (b int);
insert into t2 values (3),(7),(1);
create table t3 (c int);
insert into t3 values (3),(1);
create table t1 (a int);
insert into t1 values (1),(2),(7),(1);
select * from
(
select * from
(select 'Z' as z, t1.a from t1) dt1
left join
(select 'Y' as y, t2.b from t2) dt2
left join
(select 'X' as x, t3.c from t3) dt3
on dt2.b=dt3.c
on dt1.a=dt2.b
order by z, a, y, b, x, c
limit 9
) dt;
z a y b x c
Z 1 Y 1 X 1
Z 1 Y 1 X 1
Z 2 NULL NULL NULL NULL
Z 7 Y 7 NULL NULL
select * from
(
select * from
(select 'Z' as z, t1.a from t1) dt1
,(select * from
(select 'Y' as y, t2.b from t2) dt2
,
(select 'X' as x, t3.c from t3) dt3
where dt2.b=dt3.c(+)
) tdt2
where dt1.a=tdt2.b(+)
order by z, a, y, b, x, c
limit 9
) dt;
z a y b x c
Z 1 Y 1 X 1
Z 1 Y 1 X 1
Z 2 NULL NULL NULL NULL
Z 7 Y 7 NULL NULL
drop table t1, t2, t3;
#
# MDEV-37337: Oracle outer join syntax (+): IN equal to = allow (+) on right side
#
create table t1 (a int);
insert into t1 values (1),(2),(3);
create table t2 (b int);
insert into t2 values (2),(1),(20);
set SQL_MODE= oracle;
select t1.a, t2.b
from t1, t2
where
t1.a = t2.b(+);
a b
2 2
1 1
3 NULL
select t1.a, t2.b
from t1, t2
where
t1.a IN (t2.b(+));
a b
2 2
1 1
3 NULL
explain extended
select t1.a, t2.b
from t1, t2
where
t1.a IN (t2.b(+));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t2"."b" AS "b" from "test"."t1" left join "test"."t2" on("test"."t2"."b" = "test"."t1"."a") where 1
select t1.a, t2.b
from t1, t2
where
t1.a IN (t2.b(+), 29);
ERROR HY000: Invalid usage of (+) operator: used in OR, IN or ROW operation
DROP TABLE t1, t2;
create table t1 (a int);
insert into t1 values (1),(2),(3);
create table t2 (b int);
insert into t2 values (2),(1),(20);
set SQL_MODE= oracle;
select t1.a, t2.b
from t1, t2
where
t1.a = t2.b(+);
a b
2 2
1 1
3 NULL
select t1.a, t2.b
from t1, t2
where
t1.a IN (t2.b(+));
a b
2 2
1 1
3 NULL
explain extended
select t1.a, t2.b
from t1, t2
where
t1.a IN (t2.b(+));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t2"."b" AS "b" from "test"."t1" left join "test"."t2" on("test"."t2"."b" = "test"."t1"."a") where 1
select t1.a, t2.b
from t1, t2
where
t1.a IN (t2.b(+), 29);
ERROR HY000: Invalid usage of (+) operator: used in OR, IN or ROW operation
DROP TABLE t1, t2;
# End of 12.1 tests
set optimizer_switch=@join_outer_reorder_tmp;
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