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Commit 6ae33523 authored by Sergey Petrunya's avatar Sergey Petrunya
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Subquery optimizations, backport to 5.3: 

- Fix valgrind failure
- Test result fixes (not finished)
parent fed6f229
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mysql-test/r/subselect.result
View file @ 6ae33523
......@@ -3645,7 +3645,7 @@ FROM t1 GROUP BY t1.a LIMIT 1)
2
2
DROP TABLE t1,t2;
CREATE TABLE t1 (a int, b int auto_increment, PRIMARY KEY (b));
CREATE TABLE t1 (a int, b int, PRIMARY KEY (b));
CREATE TABLE t2 (x int auto_increment, y int, z int,
PRIMARY KEY (x), FOREIGN KEY (y) REFERENCES t1 (b));
create table t3 (a int);
......@@ -4381,7 +4381,229 @@ WHERE a = 230;
MAX(b) (SELECT COUNT(*) FROM st1,st2 WHERE st2.b <= t1.b)
NULL 0
DROP TABLE t1, st1, st2;
#
# Bug #48709: Assertion failed in sql_select.cc:11782:
# int join_read_key(JOIN_TAB*)
#
CREATE TABLE t1 (pk int PRIMARY KEY, int_key int);
INSERT INTO t1 VALUES (10,1), (14,1);
CREATE TABLE t2 (pk int PRIMARY KEY, int_key int);
INSERT INTO t2 VALUES (3,3), (5,NULL), (7,3);
# should have eq_ref for t1
EXPLAIN
SELECT * FROM t2 outr
WHERE outr.int_key NOT IN (SELECT t1.pk FROM t1, t2)
ORDER BY outr.pk;
id select_type table type possible_keys key key_len ref rows Extra
x x outr ALL x x x x x x
x x t1 eq_ref x x x x x x
x x t2 index x x x x x x
# should not crash on debug binaries
SELECT * FROM t2 outr
WHERE outr.int_key NOT IN (SELECT t1.pk FROM t1, t2)
ORDER BY outr.pk;
pk int_key
3 3
7 3
DROP TABLE t1,t2;
End of 5.0 tests.
create table t_out (subcase char(3),
a1 char(2), b1 char(2), c1 char(2));
create table t_in (a2 char(2), b2 char(2), c2 char(2));
insert into t_out values ('A.1','2a', NULL, '2a');
insert into t_out values ('A.3', '2a', NULL, '2a');
insert into t_out values ('A.4', '2a', NULL, 'xx');
insert into t_out values ('B.1', '2a', '2a', '2a');
insert into t_out values ('B.2', '2a', '2a', '2a');
insert into t_out values ('B.3', '3a', 'xx', '3a');
insert into t_out values ('B.4', 'xx', '3a', '3a');
insert into t_in values ('1a', '1a', '1a');
insert into t_in values ('2a', '2a', '2a');
insert into t_in values (NULL, '2a', '2a');
insert into t_in values ('3a', NULL, '3a');
Test general IN semantics (not top-level)
case A.1
select subcase,
(a1, b1, c1) IN (select * from t_in where a2 = 'no_match') pred_in,
(a1, b1, c1) NOT IN (select * from t_in where a2 = 'no_match') pred_not_in
from t_out where subcase = 'A.1';
subcase pred_in pred_not_in
A.1 0 1
case A.2 - impossible
case A.3
select subcase,
(a1, b1, c1) IN (select * from t_in) pred_in,
(a1, b1, c1) NOT IN (select * from t_in) pred_not_in
from t_out where subcase = 'A.3';
subcase pred_in pred_not_in
A.3 NULL NULL
case A.4
select subcase,
(a1, b1, c1) IN (select * from t_in) pred_in,
(a1, b1, c1) NOT IN (select * from t_in) pred_not_in
from t_out where subcase = 'A.4';
subcase pred_in pred_not_in
A.4 0 1
case B.1
select subcase,
(a1, b1, c1) IN (select * from t_in where a2 = 'no_match') pred_in,
(a1, b1, c1) NOT IN (select * from t_in where a2 = 'no_match') pred_not_in
from t_out where subcase = 'B.1';
subcase pred_in pred_not_in
B.1 0 1
case B.2
select subcase,
(a1, b1, c1) IN (select * from t_in) pred_in,
(a1, b1, c1) NOT IN (select * from t_in) pred_not_in
from t_out where subcase = 'B.2';
subcase pred_in pred_not_in
B.2 1 0
case B.3
select subcase,
(a1, b1, c1) IN (select * from t_in) pred_in,
(a1, b1, c1) NOT IN (select * from t_in) pred_not_in
from t_out where subcase = 'B.3';
subcase pred_in pred_not_in
B.3 NULL NULL
case B.4
select subcase,
(a1, b1, c1) IN (select * from t_in) pred_in,
(a1, b1, c1) NOT IN (select * from t_in) pred_not_in
from t_out where subcase = 'B.4';
subcase pred_in pred_not_in
B.4 0 1
Test IN as top-level predicate, and
as non-top level for cases A.3, B.3 (the only cases with NULL result).
case A.1
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'A.1' and
(a1, b1, c1) IN (select * from t_in where a1 = 'no_match');
pred_in
F
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'A.1' and
(a1, b1, c1) NOT IN (select * from t_in where a1 = 'no_match');
pred_not_in
T
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'A.1' and
NOT((a1, b1, c1) IN (select * from t_in where a1 = 'no_match'));
not_pred_in
T
case A.3
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'A.3' and
(a1, b1, c1) IN (select * from t_in);
pred_in
F
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'A.3' and
(a1, b1, c1) NOT IN (select * from t_in);
pred_not_in
F
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'A.3' and
NOT((a1, b1, c1) IN (select * from t_in));
not_pred_in
F
select case when count(*) > 0 then 'N' else 'wrong result' end as pred_in from t_out
where subcase = 'A.3' and
((a1, b1, c1) IN (select * from t_in)) is NULL and
((a1, b1, c1) NOT IN (select * from t_in)) is NULL;
pred_in
N
case A.4
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'A.4' and
(a1, b1, c1) IN (select * from t_in);
pred_in
F
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'A.4' and
(a1, b1, c1) NOT IN (select * from t_in);
pred_not_in
T
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'A.4' and
NOT((a1, b1, c1) IN (select * from t_in));
not_pred_in
T
case B.1
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'B.1' and
(a1, b1, c1) IN (select * from t_in where a1 = 'no_match');
pred_in
F
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'B.1' and
(a1, b1, c1) NOT IN (select * from t_in where a1 = 'no_match');
pred_not_in
T
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'B.1' and
NOT((a1, b1, c1) IN (select * from t_in where a1 = 'no_match'));
not_pred_in
T
case B.2
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'B.2' and
(a1, b1, c1) IN (select * from t_in);
pred_in
T
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'B.2' and
(a1, b1, c1) NOT IN (select * from t_in);
pred_not_in
F
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'B.2' and
NOT((a1, b1, c1) IN (select * from t_in));
not_pred_in
F
case B.3
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'B.3' and
(a1, b1, c1) IN (select * from t_in);
pred_in
F
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'B.3' and
(a1, b1, c1) NOT IN (select * from t_in);
pred_not_in
F
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'B.3' and
NOT((a1, b1, c1) IN (select * from t_in));
not_pred_in
F
select case when count(*) > 0 then 'N' else 'wrong result' end as pred_in from t_out
where subcase = 'B.3' and
((a1, b1, c1) IN (select * from t_in)) is NULL and
((a1, b1, c1) NOT IN (select * from t_in)) is NULL;
pred_in
N
case B.4
select case when count(*) > 0 then 'T' else 'F' end as pred_in from t_out
where subcase = 'B.4' and
(a1, b1, c1) IN (select * from t_in);
pred_in
F
select case when count(*) > 0 then 'T' else 'F' end as pred_not_in from t_out
where subcase = 'B.4' and
(a1, b1, c1) NOT IN (select * from t_in);
pred_not_in
T
select case when count(*) > 0 then 'T' else 'F' end as not_pred_in from t_out
where subcase = 'B.4' and
NOT((a1, b1, c1) IN (select * from t_in));
not_pred_in
T
drop table t_out;
drop table t_in;
CREATE TABLE t1 (a INT, b INT);
INSERT INTO t1 VALUES (2,22),(1,11),(2,22);
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
......@@ -4496,6 +4718,42 @@ DELETE FROM v3;
DROP VIEW v1,v2,v3;
DROP TABLE t1,t2;
#
# BUG#37822 Correlated subquery with IN and IS UNKNOWN provides wrong result
#
create table t1(id integer primary key, g integer, v integer, s char(1));
create table t2(id integer primary key, g integer, v integer, s char(1));
insert into t1 values
(10, 10, 10, 'l'),
(20, 20, 20, 'l'),
(40, 40, 40, 'l'),
(41, 40, null, 'l'),
(50, 50, 50, 'l'),
(51, 50, null, 'l'),
(60, 60, 60, 'l'),
(61, 60, null, 'l'),
(70, 70, 70, 'l'),
(90, 90, null, 'l');
insert into t2 values
(10, 10, 10, 'r'),
(30, 30, 30, 'r'),
(50, 50, 50, 'r'),
(60, 60, 60, 'r'),
(61, 60, null, 'r'),
(70, 70, 70, 'r'),
(71, 70, null, 'r'),
(80, 80, 80, 'r'),
(81, 80, null, 'r'),
(100,100,null, 'r');
select *
from t1
where v in(select v
from t2
where t1.g=t2.g) is unknown;
id g v s
51 50 NULL l
61 60 NULL l
drop table t1, t2;
#
# Bug#37822 Correlated subquery with IN and IS UNKNOWN provides wrong result
#
create table t1(id integer primary key, g integer, v integer, s char(1));
......@@ -4531,4 +4789,18 @@ id g v s
51 50 NULL l
61 60 NULL l
drop table t1, t2;
CREATE TABLE t1 (a ENUM('rainbow'));
INSERT INTO t1 VALUES (),(),(),(),();
SELECT 1 FROM t1 GROUP BY (SELECT 1 FROM t1 ORDER BY AVG(LAST_INSERT_ID()));
1
1
DROP TABLE t1;
CREATE TABLE t1 (a LONGBLOB);
INSERT INTO t1 SET a = 'aaaa';
INSERT INTO t1 SET a = 'aaaa';
SELECT 1 FROM t1 GROUP BY
(SELECT LAST_INSERT_ID() FROM t1 ORDER BY MIN(a) ASC LIMIT 1);
1
1
DROP TABLE t1;
End of 5.1 tests.
mysql-test/r/subselect_no_mat.result
View file @ 6ae33523
......@@ -4643,7 +4643,6 @@ INSERT INTO t1 VALUES (1), (3);
SELECT * FROM t2 WHERE b NOT IN (SELECT max(t.c) FROM t1, t1 t WHERE t.c>10);
a b
DROP TABLE t1,t2;
End of 5.0 tests.
CREATE TABLE t1(pk INT PRIMARY KEY, a INT, INDEX idx(a));
INSERT INTO t1 VALUES (1, 10), (3, 30), (2, 20);
CREATE TABLE t2(pk INT PRIMARY KEY, a INT, b INT, INDEX idxa(a));
......@@ -4694,6 +4693,33 @@ SELECT t1.a, (SELECT 1 FROM t2 WHERE t2.b=t3.c AND t2.c=t1.a ORDER BY t2.d LIMIT
a incorrect
1 1
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (id int);
CREATE TABLE t2 (id int, c int);
INSERT INTO t1 (id) VALUES (1);
INSERT INTO t2 (id) VALUES (1);
INSERT INTO t1 (id) VALUES (1);
INSERT INTO t2 (id) VALUES (1);
CREATE VIEW v1 AS
SELECT t2.c AS c FROM t1, t2
WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
UPDATE v1 SET c=1;
CREATE VIEW v2 (a,b) AS
SELECT t2.id, t2.c AS c FROM t1, t2
WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
INSERT INTO v2(a,b) VALUES (2,2);
ERROR HY000: CHECK OPTION failed 'test.v2'
SELECT * FROM v1;
c
1
1
1
1
CREATE VIEW v3 AS
SELECT t2.c AS c FROM t2
WHERE 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
DELETE FROM v3;
DROP VIEW v1,v2,v3;
DROP TABLE t1,t2;
#
# BUG#37822 Correlated subquery with IN and IS UNKNOWN provides wrong result
#
......
mysql-test/r/subselect_no_opts.result
View file @ 6ae33523
......@@ -79,7 +79,7 @@ SELECT 1 FROM (SELECT 1 as a) b WHERE 1 IN (SELECT (SELECT a));
select (SELECT 1 FROM (SELECT 1) a PROCEDURE ANALYSE(1));
ERROR HY000: Incorrect usage of PROCEDURE and subquery
SELECT 1 FROM (SELECT 1) a PROCEDURE ANALYSE((SELECT 1));
ERROR HY000: Incorrect parameters to procedure 'ANALYSE'
ERROR HY000: Incorrect usage of PROCEDURE and subquery
SELECT (SELECT 1) as a FROM (SELECT 1) b WHERE (SELECT a) IS NULL;
ERROR 42S22: Unknown column 'a' in 'field list'
SELECT (SELECT 1) as a FROM (SELECT 1) b WHERE (SELECT a) IS NOT NULL;
......@@ -4643,7 +4643,6 @@ INSERT INTO t1 VALUES (1), (3);
SELECT * FROM t2 WHERE b NOT IN (SELECT max(t.c) FROM t1, t1 t WHERE t.c>10);
a b
DROP TABLE t1,t2;
End of 5.0 tests.
CREATE TABLE t1(pk INT PRIMARY KEY, a INT, INDEX idx(a));
INSERT INTO t1 VALUES (1, 10), (3, 30), (2, 20);
CREATE TABLE t2(pk INT PRIMARY KEY, a INT, b INT, INDEX idxa(a));
......@@ -4694,6 +4693,33 @@ SELECT t1.a, (SELECT 1 FROM t2 WHERE t2.b=t3.c AND t2.c=t1.a ORDER BY t2.d LIMIT
a incorrect
1 1
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (id int);
CREATE TABLE t2 (id int, c int);
INSERT INTO t1 (id) VALUES (1);
INSERT INTO t2 (id) VALUES (1);
INSERT INTO t1 (id) VALUES (1);
INSERT INTO t2 (id) VALUES (1);
CREATE VIEW v1 AS
SELECT t2.c AS c FROM t1, t2
WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
UPDATE v1 SET c=1;
CREATE VIEW v2 (a,b) AS
SELECT t2.id, t2.c AS c FROM t1, t2
WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
INSERT INTO v2(a,b) VALUES (2,2);
ERROR HY000: CHECK OPTION failed 'test.v2'
SELECT * FROM v1;
c
1
1
1
1
CREATE VIEW v3 AS
SELECT t2.c AS c FROM t2
WHERE 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
DELETE FROM v3;
DROP VIEW v1,v2,v3;
DROP TABLE t1,t2;
#
# BUG#37822 Correlated subquery with IN and IS UNKNOWN provides wrong result
#
......
mysql-test/r/subselect_no_semijoin.result
View file @ 6ae33523
......@@ -4643,7 +4643,6 @@ INSERT INTO t1 VALUES (1), (3);
SELECT * FROM t2 WHERE b NOT IN (SELECT max(t.c) FROM t1, t1 t WHERE t.c>10);
a b
DROP TABLE t1,t2;
End of 5.0 tests.
CREATE TABLE t1(pk INT PRIMARY KEY, a INT, INDEX idx(a));
INSERT INTO t1 VALUES (1, 10), (3, 30), (2, 20);
CREATE TABLE t2(pk INT PRIMARY KEY, a INT, b INT, INDEX idxa(a));
......@@ -4694,6 +4693,33 @@ SELECT t1.a, (SELECT 1 FROM t2 WHERE t2.b=t3.c AND t2.c=t1.a ORDER BY t2.d LIMIT
a incorrect
1 1
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (id int);
CREATE TABLE t2 (id int, c int);
INSERT INTO t1 (id) VALUES (1);
INSERT INTO t2 (id) VALUES (1);
INSERT INTO t1 (id) VALUES (1);
INSERT INTO t2 (id) VALUES (1);
CREATE VIEW v1 AS
SELECT t2.c AS c FROM t1, t2
WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
UPDATE v1 SET c=1;
CREATE VIEW v2 (a,b) AS
SELECT t2.id, t2.c AS c FROM t1, t2
WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
INSERT INTO v2(a,b) VALUES (2,2);
ERROR HY000: CHECK OPTION failed 'test.v2'
SELECT * FROM v1;
c
1
1
1
1
CREATE VIEW v3 AS
SELECT t2.c AS c FROM t2
WHERE 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
DELETE FROM v3;
DROP VIEW v1,v2,v3;
DROP TABLE t1,t2;
#
# BUG#37822 Correlated subquery with IN and IS UNKNOWN provides wrong result
#
......
mysql-test/t/subselect.test
View file @ 6ae33523
......@@ -3655,8 +3655,6 @@ SELECT * FROM t2 WHERE b NOT IN (SELECT max(t.c) FROM t1, t1 t WHERE t.c>10);
DROP TABLE t1,t2;
--echo End of 5.0 tests.
#
# Bug#38191 Server crash with subquery containing DISTINCT and ORDER BY
#
......@@ -3939,6 +3937,44 @@ DROP TABLE t1,t2,t3;
# --error ER_PARSE_ERROR
# SELECT * FROM t1 WHERE a IN ( SELECT 1 INTO @v );
# DROP TABLE t1, t2;
#
# Bug#37460 Assertion failed:
# !table->file || table->file->inited == handler::NONE
#
CREATE TABLE t1 (id int);
CREATE TABLE t2 (id int, c int);
INSERT INTO t1 (id) VALUES (1);
INSERT INTO t2 (id) VALUES (1);
INSERT INTO t1 (id) VALUES (1);
INSERT INTO t2 (id) VALUES (1);
CREATE VIEW v1 AS
SELECT t2.c AS c FROM t1, t2
WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
UPDATE v1 SET c=1;
CREATE VIEW v2 (a,b) AS
SELECT t2.id, t2.c AS c FROM t1, t2
WHERE t1.id=t2.id AND 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
--error ER_VIEW_CHECK_FAILED
INSERT INTO v2(a,b) VALUES (2,2);
# disabled for now as this refers to old content of t2
--disable_parsing
INSERT INTO v2(a,b) VALUES (1,2);
--enable_parsing
SELECT * FROM v1;
CREATE VIEW v3 AS
SELECT t2.c AS c FROM t2
WHERE 1 IN (SELECT id FROM t1) WITH CHECK OPTION;
DELETE FROM v3;
DROP VIEW v1,v2,v3;
DROP TABLE t1,t2;
--echo #
--echo # BUG#37822 Correlated subquery with IN and IS UNKNOWN provides wrong result
......
sql/sql_select.cc
View file @ 6ae33523
......@@ -4663,6 +4663,7 @@ typedef struct key_field_t {
*/
bool null_rejecting;
bool *cond_guard; /* See KEYUSE::cond_guard */
uint sj_pred_no; /* See KEYUSE::sj_pred_no */
} KEY_FIELD;
/**
......@@ -4828,6 +4829,52 @@ merge_key_fields(KEY_FIELD *start,KEY_FIELD *new_fields,KEY_FIELD *end,
}
/*
Given a field, return its index in semi-join's select list, or UINT_MAX
DESCRIPTION
Given a field, we find its table; then see if the table is within a
semi-join nest and if the field was in select list of the subselect.
If it was, we return field's index in the select list. The value is used
by LooseScan strategy.
*/
static uint get_semi_join_select_list_index(Field *field)
{
uint res= UINT_MAX;
TABLE_LIST *emb_sj_nest;
if ((emb_sj_nest= field->table->pos_in_table_list->embedding) &&
emb_sj_nest->sj_on_expr)
{
Item_in_subselect *subq_pred= emb_sj_nest->sj_subq_pred;
st_select_lex *subq_lex= subq_pred->unit->first_select();
if (subq_pred->left_expr->cols() == 1)
{
Item *sel_item= subq_lex->ref_pointer_array[0];
if (sel_item->type() == Item::FIELD_ITEM &&
((Item_field*)sel_item)->field->eq(field))
{
res= 0;
}
}
else
{
for (uint i= 0; i < subq_pred->left_expr->cols(); i++)
{
Item *sel_item= subq_lex->ref_pointer_array[i];
if (sel_item->type() == Item::FIELD_ITEM &&
((Item_field*)sel_item)->field->eq(field))
{
res= i;
break;
}
}
}
}
return res;
}
/**
Add a possible key to array of possible keys if it's usable as a key
......@@ -4998,6 +5045,8 @@ add_key_field(KEY_FIELD **key_fields,uint and_level, Item_func *cond,
(*key_fields)->null_rejecting= false;
}
(*key_fields)->cond_guard= NULL;
(*key_fields)->sj_pred_no= get_semi_join_select_list_index(field);
(*key_fields)++;
}
......@@ -5334,6 +5383,7 @@ add_key_part(DYNAMIC_ARRAY *keyuse_array,KEY_FIELD *key_field)
keyuse.optimize= key_field->optimize & KEY_OPTIMIZE_REF_OR_NULL;
keyuse.null_rejecting= key_field->null_rejecting;
keyuse.cond_guard= key_field->cond_guard;
keyuse.sj_pred_no= key_field->sj_pred_no;
if (insert_dynamic(keyuse_array,(uchar*) &keyuse))
return TRUE;
}
......@@ -5406,6 +5456,7 @@ add_ft_keys(DYNAMIC_ARRAY *keyuse_array,
keyuse.used_tables=cond_func->key_item()->used_tables();
keyuse.optimize= 0;
keyuse.keypart_map= 0;
keyuse.sj_pred_no= UINT_MAX;
return insert_dynamic(keyuse_array,(uchar*) &keyuse);
}
......
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