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mariadb/mysql-test/r/join_nested.result

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join_nested.test, join_nested.result: new file Many files: Nested joins added.
2004-06-10 22:27:21 -07:00
DROP TABLE IF EXISTS t0,t1,t2,t3,t4,t5,t6,t7,t8,t9;
Warnings:
Note 1051 Unknown table 't0'
Note 1051 Unknown table 't1'
Note 1051 Unknown table 't2'
Note 1051 Unknown table 't3'
Note 1051 Unknown table 't4'
Note 1051 Unknown table 't5'
Note 1051 Unknown table 't6'
Note 1051 Unknown table 't7'
Note 1051 Unknown table 't8'
Note 1051 Unknown table 't9'
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
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 Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 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
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
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 Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 2
1 SIMPLE t5 ALL NULL NULL NULL NULL 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
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
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 Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 2
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 Using where
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
subselect2.result, select.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed. join_nested.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed sql_select.cc: Post-merge fixes for nested joins. Avoided re-execution of eliminate_not_funcs and simplify_joins in optimize_cond. Changed the join_tab_cmp function to take into account the dependent relation. sql_lex.cc, sql_lex.h: Added the first_cond_optimization flag to st_select_lex to avoid re-execution of some optimizations in optimize_cond. sql_base.cc: Post-merge fixes for nested joins. Fixed problems with a proper column list substituted for '*' in queries with natural joins.
2004-06-30 05:54:32 -07:00
6 2 1 1
join_nested.test, join_nested.result: new file Many files: Nested joins added.
2004-06-10 22:27:21 -07:00
6 2 2 2
subselect2.result, select.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed. join_nested.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed sql_select.cc: Post-merge fixes for nested joins. Avoided re-execution of eliminate_not_funcs and simplify_joins in optimize_cond. Changed the join_tab_cmp function to take into account the dependent relation. sql_lex.cc, sql_lex.h: Added the first_cond_optimization flag to st_select_lex to avoid re-execution of some optimizations in optimize_cond. sql_base.cc: Post-merge fixes for nested joins. Fixed problems with a proper column list substituted for '*' in queries with natural joins.
2004-06-30 05:54:32 -07:00
6 1 1 1
join_nested.test, join_nested.result: new file Many files: Nested joins added.
2004-06-10 22:27:21 -07:00
6 1 2 2
SELECT t8.a,t8.b
FROM t8;
a b
0 2
1 2
EXPLAIN
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 Extra
1 SIMPLE t7 ALL NULL NULL NULL NULL 2
subselect2.result, select.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed. join_nested.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed sql_select.cc: Post-merge fixes for nested joins. Avoided re-execution of eliminate_not_funcs and simplify_joins in optimize_cond. Changed the join_tab_cmp function to take into account the dependent relation. sql_lex.cc, sql_lex.h: Added the first_cond_optimization flag to st_select_lex to avoid re-execution of some optimizations in optimize_cond. sql_base.cc: Post-merge fixes for nested joins. Fixed problems with a proper column list substituted for '*' in queries with natural joins.
2004-06-30 05:54:32 -07:00
1 SIMPLE t6 ALL NULL NULL NULL NULL 3
join_nested.test, join_nested.result: new file Many files: Nested joins added.
2004-06-10 22:27:21 -07:00
1 SIMPLE t8 ALL NULL NULL NULL NULL 2
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
subselect2.result, select.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed. join_nested.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed sql_select.cc: Post-merge fixes for nested joins. Avoided re-execution of eliminate_not_funcs and simplify_joins in optimize_cond. Changed the join_tab_cmp function to take into account the dependent relation. sql_lex.cc, sql_lex.h: Added the first_cond_optimization flag to st_select_lex to avoid re-execution of some optimizations in optimize_cond. sql_base.cc: Post-merge fixes for nested joins. Fixed problems with a proper column list substituted for '*' in queries with natural joins.
2004-06-30 05:54:32 -07:00
6 2 1 1 NULL NULL
join_nested.test, join_nested.result: new file Many files: Nested joins added.
2004-06-10 22:27:21 -07:00
6 2 2 2 0 2
6 2 2 2 1 2
subselect2.result, select.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed. join_nested.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed sql_select.cc: Post-merge fixes for nested joins. Avoided re-execution of eliminate_not_funcs and simplify_joins in optimize_cond. Changed the join_tab_cmp function to take into account the dependent relation. sql_lex.cc, sql_lex.h: Added the first_cond_optimization flag to st_select_lex to avoid re-execution of some optimizations in optimize_cond. sql_base.cc: Post-merge fixes for nested joins. Fixed problems with a proper column list substituted for '*' in queries with natural joins.
2004-06-30 05:54:32 -07:00
6 1 1 1 NULL NULL
join_nested.test, join_nested.result: new file Many files: Nested joins added.
2004-06-10 22:27:21 -07:00
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
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 Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2
1 SIMPLE t4 ALL NULL NULL NULL NULL 2
1 SIMPLE t5 ALL NULL NULL NULL NULL 3
1 SIMPLE t7 ALL NULL NULL NULL NULL 2
1 SIMPLE t6 ALL NULL NULL NULL NULL 3
1 SIMPLE t8 ALL NULL NULL NULL NULL 2
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
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 Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using where
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 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 3 NULL NULL NULL NULL NULL NULL 1 1
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 3 NULL NULL NULL NULL NULL NULL 1 1
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 3 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 3 1 6 2 1 1 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 3 NULL NULL NULL NULL NULL NULL 1 2
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 2 2 6 2 2 2 0 2 1 2
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 3 1 6 2 1 1 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 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 1 2 NULL NULL
1 3 3 3 2 2 NULL NULL
subselect2.result, select.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed. join_nested.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed sql_select.cc: Post-merge fixes for nested joins. Avoided re-execution of eliminate_not_funcs and simplify_joins in optimize_cond. Changed the join_tab_cmp function to take into account the dependent relation. sql_lex.cc, sql_lex.h: Added the first_cond_optimization flag to st_select_lex to avoid re-execution of some optimizations in optimize_cond. sql_base.cc: Post-merge fixes for nested joins. Fixed problems with a proper column list substituted for '*' in queries with natural joins.
2004-06-30 05:54:32 -07:00
2 2 3 3 1 2 NULL NULL
join_nested.test, join_nested.result: new file Many files: Nested joins added.
2004-06-10 22:27:21 -07:00
2 2 3 3 2 2 NULL NULL
1 3 4 2 1 2 3 2
1 3 4 2 1 2 4 2
subselect2.result, select.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed. join_nested.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed sql_select.cc: Post-merge fixes for nested joins. Avoided re-execution of eliminate_not_funcs and simplify_joins in optimize_cond. Changed the join_tab_cmp function to take into account the dependent relation. sql_lex.cc, sql_lex.h: Added the first_cond_optimization flag to st_select_lex to avoid re-execution of some optimizations in optimize_cond. sql_base.cc: Post-merge fixes for nested joins. Fixed problems with a proper column list substituted for '*' in queries with natural joins.
2004-06-30 05:54:32 -07:00
1 3 4 2 2 2 NULL NULL
join_nested.test, join_nested.result: new file Many files: Nested joins added.
2004-06-10 22:27:21 -07:00
2 2 4 2 1 2 3 2
2 2 4 2 1 2 4 2
2 2 4 2 2 2 NULL NULL
1 3 5 3 1 2 NULL NULL
1 3 5 3 2 2 NULL NULL
subselect2.result, select.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed. join_nested.result: Post-merge fixes for nested joins. The join_tab_cmp function in sql_select has been changed sql_select.cc: Post-merge fixes for nested joins. Avoided re-execution of eliminate_not_funcs and simplify_joins in optimize_cond. Changed the join_tab_cmp function to take into account the dependent relation. sql_lex.cc, sql_lex.h: Added the first_cond_optimization flag to st_select_lex to avoid re-execution of some optimizations in optimize_cond. sql_base.cc: Post-merge fixes for nested joins. Fixed problems with a proper column list substituted for '*' in queries with natural joins.
2004-06-30 05:54:32 -07:00
2 2 5 3 1 2 NULL NULL
join_nested.test, join_nested.result: new file Many files: Nested joins added.
2004-06-10 22:27:21 -07:00
2 2 5 3 2 2 NULL NULL
CREATE INDEX idx_b ON t2(b);
EXPLAIN
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;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 ALL NULL NULL NULL NULL 2
1 SIMPLE t4 ALL NULL NULL NULL NULL 2
1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
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;
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
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 Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using where
CREATE INDEX idx_b ON t4(b);
CREATE INDEX idx_b ON t5(b);
EXPLAIN
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 Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 Using where
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using where
CREATE INDEX idx_b ON t8(b);
EXPLAIN
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 Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 Using where
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t8 ref idx_b idx_b 5 test.t7.b 2 Using where
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using where
CREATE INDEX idx_b ON t1(b);
CREATE INDEX idx_a ON t0(a);
EXPLAIN
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 Extra
1 SIMPLE t0 ref idx_a idx_a 5 const 1 Using where
1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 2 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 Using where
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t8 ref idx_b idx_b 5 test.t7.b 2 Using where
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using where
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 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 3 NULL NULL NULL NULL NULL NULL 1 1
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 3 NULL NULL NULL NULL NULL NULL 1 1
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 3 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 3 1 6 2 1 1 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 3 NULL NULL NULL NULL NULL NULL 1 2
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 2 2 6 2 2 2 0 2 1 2
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 3 1 6 2 1 1 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 3 NULL NULL NULL NULL NULL NULL 1 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
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;
Reference in a new issue Copy permalink