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Derived tables and union can now create distinct keys

Browse Source 
The idea is that instead of marking all select_lex's with DISTINCT, we
only mark those that really need distinct result.

Benefits of this change:
- Temporary tables used with derived tables, UNION, IN are now smaller
  as duplicates are removed already on the insert phase.
- The optimizer can now produce better plans with EQ_REF. This can be
  seen from the tests where several queries does not anymore materialize
  derived tables twice.
- Queries affected by 'in_predicate_conversion_threshold' where large IN
  lists are converted to sub query produces better plans.

Other things:
- Removed on duplicate call to sel->init_select() in
  LEX::add_primary_to_query_expression_body()
- I moved the testing of
  tab->table->pos_in_table_list->is_materialized_derived()
  in join_read_const_table() to the caller as it caused problems for
  derived tables that could be proven to be const tables.
  This also is likely to fix some bugs as if join_read_const_table()
  was aborted, the table was left marked as JT_CONST, which cannot
  be good.  I added an ASSERT there for now that can be removed when
  the code has been properly tested.
This commit is contained in:
Monty
2022-05-04 17:26:43 +03:00
committed by Sergei Petrunia
parent 868d577cb6
commit 5e5a8eda16
22 changed files with 534 additions and 210 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
mysql-test/main/cte_nonrecursive.result
View File

@ -183,7 +183,7 @@ where c in (select c from (select count(*) as c from t1
where b >= 'c' group by a) as t);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 4 Using where
1 PRIMARY <derived3> ref key0 key0 8 test.t2.c 2 Using where; FirstMatch(t2)
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 8 test.t2.c 1 Using where
3 DERIVED t1 ALL NULL NULL NULL NULL 8 Using where; Using temporary; Using filesort
# two references to t specified by a query
# selecting a field: both in main query
@ -369,7 +369,7 @@ select c as a from t2 where c < 4)
select * from t2,t where t2.c=t.a;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 4 Using where
1 PRIMARY <derived2> ref key0 key0 5 test.t2.c 1
1 PRIMARY <derived2> eq_ref distinct_key distinct_key 5 test.t2.c 1
2 DERIVED t1 ALL NULL NULL NULL NULL 8 Using where
3 UNION t2 ALL NULL NULL NULL NULL 4 Using where
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
@ -381,7 +381,7 @@ select c as a from t2 where c < 4) as t
where t2.c=t.a;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 4 Using where
1 PRIMARY <derived2> ref key0 key0 5 test.t2.c 1
1 PRIMARY <derived2> eq_ref distinct_key distinct_key 5 test.t2.c 1
2 DERIVED t1 ALL NULL NULL NULL NULL 8 Using where
3 UNION t2 ALL NULL NULL NULL NULL 4 Using where
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL

74
mysql-test/main/derived.result
View File

@ -370,6 +370,15 @@ a
2
3
3
set @save2_derived_optimizer_switch_bug=@@optimizer_switch;
set @@optimizer_switch=default;
select * from (select * from t1 union distinct select * from t2 union all select * from t3) X;
a
1
2
3
3
set @@optimizer_switch=@save2_derived_optimizer_switch_bug;
drop table t1, t2, t3;
create table t1 (a int);
create table t2 (a int);
@ -1290,7 +1299,7 @@ id select_type table type possible_keys key key_len ref rows r_rows filtered r_f
analyze select * from t1 , ( (select t2.a from t2 order by c) union (select t2.a from t2 order by c))q where t1.a=q.a;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 6.00 100.00 100.00 Using where
1 PRIMARY <derived2> ref key0 key0 5 test.t1.a 1 1.00 100.00 100.00
1 PRIMARY <derived2> eq_ref distinct_key distinct_key 5 test.t1.a 1 1.00 100.00 100.00
2 DERIVED t2 ALL NULL NULL NULL NULL 6 6.00 100.00 100.00
3 UNION t2 ALL NULL NULL NULL NULL 6 6.00 100.00 100.00
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL 6.00 NULL NULL
@ -1333,3 +1342,66 @@ DROP TABLE t1;
#
# End of 10.3 tests
#
#
# Test of "Derived tables and union can now create distinct keys"
#
create table t1 (a int);
insert into t1 values (100),(100);
create table duplicates_tbl (a int);
insert into duplicates_tbl select seq/100 from seq_1_to_10000;
explain
select
t1.a IN ( SELECT COUNT(*)
from (select a
from duplicates_tbl
limit 10000
) T
where T.a=5
) as 'A'
from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 10000 Using where
3 DERIVED duplicates_tbl ALL NULL NULL NULL NULL 10000
select
t1.a IN ( SELECT COUNT(*)
from (select a
from duplicates_tbl
limit 10000
) T
where T.a=5
) as 'A'
from t1;
A
1
1
explain
select
t1.a = all ( SELECT COUNT(*)
from (select a
from duplicates_tbl
limit 10000
) T
where T.a=5
) as 'A'
from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 DEPENDENT SUBQUERY <derived3> ALL NULL NULL NULL NULL 10000 Using where
3 DERIVED duplicates_tbl ALL NULL NULL NULL NULL 10000
select
t1.a = all ( SELECT COUNT(*)
from (select a
from duplicates_tbl
limit 10000
) T
where T.a=5
) as 'A'
from t1;
A
1
1
drop table t1, duplicates_tbl;
#
# End of 11.0 tests
#

63
mysql-test/main/derived.test
View File

@ -260,6 +260,10 @@ insert into t2 values(2),(2);
insert into t3 values(3),(3);
select * from t1 union distinct select * from t2 union all select * from t3;
select * from (select * from t1 union distinct select * from t2 union all select * from t3) X;
set @save2_derived_optimizer_switch_bug=@@optimizer_switch;
set @@optimizer_switch=default;
select * from (select * from t1 union distinct select * from t2 union all select * from t3) X;
set @@optimizer_switch=@save2_derived_optimizer_switch_bug;
drop table t1, t2, t3;
#
@ -1128,7 +1132,6 @@ select * from t1 , ( (select t2.a from t2 order by c) union all (select t2.a fr
drop table t1,t2,t3;
--echo #
--echo # MDEV-16549: Server crashes in Item_field::fix_fields on query with
--echo # view and subquery, Assertion `context' failed, Assertion `field' failed
@ -1147,3 +1150,61 @@ DROP TABLE t1;
--echo #
--echo # End of 10.3 tests
--echo #
--echo #
--echo # Test of "Derived tables and union can now create distinct keys"
--echo #
create table t1 (a int);
insert into t1 values (100),(100);
create table duplicates_tbl (a int);
insert into duplicates_tbl select seq/100 from seq_1_to_10000;
explain
select
t1.a IN ( SELECT COUNT(*)
from (select a
from duplicates_tbl
limit 10000
) T
where T.a=5
) as 'A'
from t1;
select
t1.a IN ( SELECT COUNT(*)
from (select a
from duplicates_tbl
limit 10000
) T
where T.a=5
) as 'A'
from t1;
explain
select
t1.a = all ( SELECT COUNT(*)
from (select a
from duplicates_tbl
limit 10000
) T
where T.a=5
) as 'A'
from t1;
select
t1.a = all ( SELECT COUNT(*)
from (select a
from duplicates_tbl
limit 10000
) T
where T.a=5
) as 'A'
from t1;
drop table t1, duplicates_tbl;
--echo #
--echo # End of 11.0 tests
--echo #

36
mysql-test/main/derived_cond_pushdown.result
View File

@ -10433,7 +10433,7 @@ WHERE d_tab.e>1
;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where
1 PRIMARY <derived3> ref key0 key0 10 test.t1.a,test.t1.b 2 FirstMatch(t1)
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 10 test.t1.a,test.t1.b 1
3 DERIVED t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.a,t1.b) IN
@ -10465,15 +10465,14 @@ EXPLAIN
{
"table": {
"table_name": "<derived3>",
"access_type": "ref",
"possible_keys": ["key0"],
"key": "key0",
"access_type": "eq_ref",
"possible_keys": ["distinct_key"],
"key": "distinct_key",
"key_length": "10",
"used_key_parts": ["e", "max_f"],
"ref": ["test.t1.a", "test.t1.b"],
"rows": 2,
"rows": 1,
"filtered": 100,
"first_match": "t1",
"materialized": {
"query_block": {
"select_id": 3,
@ -10532,7 +10531,7 @@ WHERE d_tab.max_f<25
;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where
1 PRIMARY <derived3> ref key0 key0 10 test.t1.a,test.t1.b 2 FirstMatch(t1)
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 10 test.t1.a,test.t1.b 1
3 DERIVED t2 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
EXPLAIN FORMAT=JSON SELECT * FROM t1
WHERE (t1.a,t1.b) IN
@ -10564,15 +10563,14 @@ EXPLAIN
{
"table": {
"table_name": "<derived3>",
"access_type": "ref",
"possible_keys": ["key0"],
"key": "key0",
"access_type": "eq_ref",
"possible_keys": ["distinct_key"],
"key": "distinct_key",
"key_length": "10",
"used_key_parts": ["e", "max_f"],
"ref": ["test.t1.a", "test.t1.b"],
"rows": 2,
"rows": 1,
"filtered": 100,
"first_match": "t1",
"materialized": {
"query_block": {
"select_id": 3,
@ -13399,7 +13397,7 @@ where
((d1.a<4) and (d1.c<200)));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
1 PRIMARY <derived2> ref key0 key0 5 test.t2.b 2 Using where
1 PRIMARY <derived2> ref key1 key1 5 test.t2.b 2 Using where
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
3 INTERSECT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL
@ -13432,8 +13430,8 @@ EXPLAIN
"table": {
"table_name": "<derived2>",
"access_type": "ref",
"possible_keys": ["key0"],
"key": "key0",
"possible_keys": ["key1"],
"key": "key1",
"key_length": "5",
"used_key_parts": ["b"],
"ref": ["test.t2.b"],
@ -14446,7 +14444,7 @@ where
((d1.a>4) and (d1.c>500)));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 9 Using where
1 PRIMARY <derived2> ref key0 key0 5 test.t2.b 2 Using where
1 PRIMARY <derived2> ref key1 key1 5 test.t2.b 2 Using where
2 DERIVED t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
3 EXCEPT t1 ALL NULL NULL NULL NULL 18 Using where; Using temporary; Using filesort
NULL EXCEPT RESULT <except2,3> ALL NULL NULL NULL NULL NULL
@ -14479,8 +14477,8 @@ EXPLAIN
"table": {
"table_name": "<derived2>",
"access_type": "ref",
"possible_keys": ["key0"],
"key": "key0",
"possible_keys": ["key1"],
"key": "key1",
"key_length": "5",
"used_key_parts": ["b"],
"ref": ["test.t2.b"],
@ -19543,7 +19541,7 @@ on (t1.id = t2.ro_id AND t2.flag = 1)
group by t1.id) dt);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 20 100.00
1 PRIMARY <derived3> ref key0 key0 4 test.t1.id 2 100.00 FirstMatch(t1)
1 PRIMARY <derived3> ref key1 key1 4 test.t1.id 2 100.00 FirstMatch(t1)
3 DERIVED t1 ALL PRIMARY NULL NULL NULL 20 100.00 Using temporary; Using filesort
3 DERIVED t2 ref ro_id ro_id 4 test.t1.id 1 100.00 Using where
Warnings:

3
mysql-test/main/derived_opt.result
View File

@ -323,10 +323,9 @@ JOIN t1 AS tc ON (tb.pk = tc.pk)
JOIN t4 AS td ON tc.a = td.a) tu)
limit 10;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL #
1 PRIMARY <derived3> ALL NULL NULL NULL NULL #
1 PRIMARY tx eq_ref PRIMARY PRIMARY 4 tu.pk # Using index
1 PRIMARY ty eq_ref PRIMARY PRIMARY 4 tu.pk # Using index
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL #
3 DERIVED td system PRIMARY NULL NULL NULL # Using temporary
3 DERIVED tc ref PRIMARY,a a 3 const #
3 DERIVED ta eq_ref PRIMARY PRIMARY 4 test.tc.pk # Using index

24
mysql-test/main/myisam_explain_non_select_all.result
View File

@ -3069,14 +3069,14 @@ Warning 1287 '<select expression> INTO <destination>;' is deprecated and will be
EXPLAIN UPDATE t1 SET a = 10 WHERE a IN (SELECT * FROM (SELECT b FROM t2 ORDER BY b LIMIT 2,2) x);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
2 DEPENDENT SUBQUERY <derived3> index_subquery key0 key0 5 func 2
2 DEPENDENT SUBQUERY <derived3> unique_subquery distinct_key distinct_key 5 func 1
3 DERIVED t2 ALL NULL NULL NULL NULL 3 Using filesort
FLUSH STATUS;
FLUSH TABLES;
EXPLAIN EXTENDED UPDATE t1 SET a = 10 WHERE a IN (SELECT * FROM (SELECT b FROM t2 ORDER BY b LIMIT 2,2) x);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> index_subquery key0 key0 5 func 2 100.00
2 DEPENDENT SUBQUERY <derived3> unique_subquery distinct_key distinct_key 5 func 1 100.00
3 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 Using filesort
# Status of EXPLAIN EXTENDED query
Variable_name Value
@ -3086,10 +3086,10 @@ FLUSH TABLES;
EXPLAIN EXTENDED SELECT * FROM t1 WHERE a IN (SELECT * FROM (SELECT b FROM t2 ORDER BY b LIMIT 2,2) x);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
1 PRIMARY <derived3> ref key0 key0 5 test.t1.a 2 100.00 FirstMatch(t1)
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 5 test.t1.a 1 100.00
3 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join ((/* select#3 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`b` limit 2,2) `x`) where `x`.`b` = `test`.`t1`.`a`
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from (/* select#3 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`b` limit 2,2) `x` join `test`.`t1` where `x`.`b` = `test`.`t1`.`a`
# Status of EXPLAIN EXTENDED "equivalent" SELECT query execution
Variable_name Value
Handler_read_key 4
@ -3120,7 +3120,7 @@ Warning 1287 '<select expression> INTO <destination>;' is deprecated and will be
EXPLAIN UPDATE t1, t2 SET a = 10 WHERE a IN (SELECT * FROM (SELECT b FROM t2 ORDER BY b LIMIT 2,2) x);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY <derived3> ref key0 key0 5 test.t1.a 2 FirstMatch(t1)
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 5 test.t1.a 1
1 PRIMARY t2 ALL NULL NULL NULL NULL 3
3 DERIVED t2 ALL NULL NULL NULL NULL 3 Using filesort
FLUSH STATUS;
@ -3128,7 +3128,7 @@ FLUSH TABLES;
EXPLAIN EXTENDED UPDATE t1, t2 SET a = 10 WHERE a IN (SELECT * FROM (SELECT b FROM t2 ORDER BY b LIMIT 2,2) x);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
1 PRIMARY <derived3> ref key0 key0 5 test.t1.a 2 100.00 FirstMatch(t1)
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 5 test.t1.a 1 100.00
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00
3 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 Using filesort
# Status of EXPLAIN EXTENDED query
@ -3139,11 +3139,11 @@ FLUSH TABLES;
EXPLAIN EXTENDED SELECT * FROM t1, t2 WHERE a IN (SELECT * FROM (SELECT b FROM t2 ORDER BY b LIMIT 2,2) x);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
1 PRIMARY <derived3> ref key0 key0 5 test.t1.a 2 100.00 FirstMatch(t1)
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 5 test.t1.a 1 100.00
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
3 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` semi join ((/* select#3 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`b` limit 2,2) `x`) join `test`.`t2` where `x`.`b` = `test`.`t1`.`a`
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b` from (/* select#3 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`b` limit 2,2) `x` join `test`.`t1` join `test`.`t2` where `x`.`b` = `test`.`t1`.`a`
# Status of EXPLAIN EXTENDED "equivalent" SELECT query execution
Variable_name Value
Handler_read_key 4
@ -3173,7 +3173,7 @@ Warning 1287 '<select expression> INTO <destination>;' is deprecated and will be
EXPLAIN UPDATE t1, (SELECT * FROM t2) y SET a = 10 WHERE a IN (SELECT * FROM (SELECT b FROM t2 ORDER BY b LIMIT 2,2) x);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY <derived4> ref key0 key0 5 test.t1.a 2 FirstMatch(t1)
1 PRIMARY <derived4> eq_ref distinct_key distinct_key 5 test.t1.a 1
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3
4 DERIVED t2 ALL NULL NULL NULL NULL 3 Using filesort
2 DERIVED t2 ALL NULL NULL NULL NULL 3
@ -3182,7 +3182,7 @@ FLUSH TABLES;
EXPLAIN EXTENDED UPDATE t1, (SELECT * FROM t2) y SET a = 10 WHERE a IN (SELECT * FROM (SELECT b FROM t2 ORDER BY b LIMIT 2,2) x);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
1 PRIMARY <derived4> ref key0 key0 5 test.t1.a 2 100.00 FirstMatch(t1)
1 PRIMARY <derived4> eq_ref distinct_key distinct_key 5 test.t1.a 1 100.00
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 100.00
4 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 Using filesort
2 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00
@ -3194,11 +3194,11 @@ FLUSH TABLES;
EXPLAIN EXTENDED SELECT * FROM t1, (SELECT * FROM t2) y WHERE a IN (SELECT * FROM (SELECT b FROM t2 ORDER BY b LIMIT 2,2) x);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
1 PRIMARY <derived4> ref key0 key0 5 test.t1.a 2 100.00 FirstMatch(t1)
1 PRIMARY <derived4> eq_ref distinct_key distinct_key 5 test.t1.a 1 100.00
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
4 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` semi join ((/* select#4 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`b` limit 2,2) `x`) join `test`.`t2` where `x`.`b` = `test`.`t1`.`a`
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b` from (/* select#4 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`b` limit 2,2) `x` join `test`.`t1` join `test`.`t2` where `x`.`b` = `test`.`t1`.`a`
# Status of EXPLAIN EXTENDED "equivalent" SELECT query execution
Variable_name Value
Handler_read_key 4

2
mysql-test/main/opt_trace.result
View File

@ -11406,7 +11406,7 @@ set in_predicate_conversion_threshold=3;
explain select * from t0 where a in (1,2,3,4,5,6);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t0 ALL NULL NULL NULL NULL 10 Using where
1 PRIMARY <derived3> ref key0 key0 4 test.t0.a 2 FirstMatch(t0)
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t0.a 1
3 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used
select json_detailed(json_extract(trace, '$**.in_to_subquery_conversion'))
from information_schema.optimizer_trace;

180
mysql-test/main/opt_tvc.result
View File

@ -46,12 +46,11 @@ a b
2 5
explain extended select * from t1 where a in (1,2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a`
explain extended select * from t1
where a in
(
@ -59,12 +58,49 @@ select *
from (values (1),(2)) as tvc_0
);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
select * from t1 where a in (1,2,2,2,3,4,5,6,7);
a b
1 2
4 6
1 1
2 5
7 8
select * from t1
where a in
(
select *
from (values (1),(2),(2),(2),(2),(3),(4),(5),(6),(7)) as tvc_0
);
a b
1 2
4 6
1 1
2 5
7 8
explain extended select * from t1 where a in (1,2,2,2,3,4,5,6,7);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2),(2),(2),(3),(4),(5),(6),(7)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a`
explain extended select * from t1
where a in
(
select *
from (values (1),(2),(2),(2),(2),(3),(4),(5),(6),(7)) as tvc_0
);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2),(2),(2),(2),(3),(4),(5),(6),(7)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
# AND-condition with IN-predicates in WHERE-part
select * from t1
where a in (1,2) and
@ -90,15 +126,13 @@ explain extended select * from t1
where a in (1,2) and
b in (1,5);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
4 MATERIALIZED <derived5> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
1 PRIMARY <derived5> eq_ref distinct_key distinct_key 4 test.t1.b 1 100.00
5 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) semi join ((values (1),(5)) `tvc_1`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(5)) `tvc_1` join (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a` and `tvc_1`.`_col_1` = `test`.`t1`.`b`
explain extended select * from t1
where a in
(
@ -111,15 +145,13 @@ select *
from (values (1),(5)) as tvc_1
);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
4 MATERIALIZED <derived5> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
1 PRIMARY <derived5> eq_ref distinct_key distinct_key 4 test.t1.b 1 100.00
5 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) semi join ((values (1),(5)) `tvc_1`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(5)) `tvc_1` join (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a` and `tvc_1`.`1` = `test`.`t1`.`b`
# subquery with IN-predicate
select * from t1
where a in
@ -150,8 +182,8 @@ from t2 where b in (3,4)
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 6 100.00
2 MATERIALIZED <derived4> ALL NULL NULL NULL NULL 2 75.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 6 100.00 Using where
2 MATERIALIZED <derived4> eq_ref distinct_key distinct_key 4 test.t2.b 1 100.00
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (3),(4)) `tvc_0` join `test`.`t2`) where `tvc_0`.`_col_1` = `test`.`t2`.`b`
@ -168,8 +200,8 @@ from (values (3),(4)) as tvc_0
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 6 100.00
2 MATERIALIZED <derived4> ALL NULL NULL NULL NULL 2 75.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 6 100.00 Using where
2 MATERIALIZED <derived4> eq_ref distinct_key distinct_key 4 test.t2.b 1 100.00
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (3),(4)) `tvc_0` join `test`.`t2`) where `tvc_0`.`3` = `test`.`t2`.`b`
@ -206,12 +238,11 @@ from t1
where a in (1,2)
) as dr_table;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 MATERIALIZED <derived4> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived4> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a`
explain extended select * from
(
select *
@ -224,12 +255,11 @@ as tvc_0
)
) as dr_table;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 MATERIALIZED <derived4> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived4> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
# non-recursive CTE with IN-predicate
with tvc_0 as
(
@ -265,12 +295,11 @@ where a in (1,2)
)
select * from tvc_0;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 MATERIALIZED <derived4> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived4> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 with tvc_0 as (/* select#2 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where `test`.`t1`.`a` in (1,2))/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1
Note 1003 with tvc_0 as (/* select#2 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (dual) join `test`.`t1` where `test`.`t1`.`a` in (1,2))/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a`
explain extended select * from
(
select *
@ -283,12 +312,11 @@ as tvc_0
)
) as dr_table;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 MATERIALIZED <derived4> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived4> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
# VIEW with IN-predicate
create view v1 as
select *
@ -316,20 +344,18 @@ a b
2 5
explain extended select * from v1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 MATERIALIZED <derived4> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived4> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a`
explain extended select * from v2;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 MATERIALIZED <derived4> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived4> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
drop view v1,v2;
# subselect defined by derived table with IN-predicate
select * from t1
@ -382,8 +408,8 @@ as dr_table
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 6 100.00
2 MATERIALIZED <derived5> ALL NULL NULL NULL NULL 2 75.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 MATERIALIZED <derived5> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
5 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0` join `test`.`t1`) where `test`.`t1`.`a` = 1 and `tvc_0`.`_col_1` = `test`.`t1`.`a`
@ -407,8 +433,8 @@ as dr_table
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 6 100.00
2 MATERIALIZED <derived5> ALL NULL NULL NULL NULL 2 75.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 MATERIALIZED <derived5> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
5 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0` join `test`.`t1`) where `test`.`t1`.`a` = 1 and `tvc_0`.`1` = `test`.`t1`.`a`
@ -444,13 +470,12 @@ where b in (3,5)
group by b
) as dr_table;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 9 100.00
2 DERIVED t1 ALL NULL NULL NULL NULL 6 100.00 Using temporary; Using filesort
2 DERIVED <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 MATERIALIZED <derived4> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 100.00
2 DERIVED t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort
2 DERIVED <derived4> eq_ref distinct_key distinct_key 4 test.t1.b 1 100.00
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `dr_table`.`max(a)` AS `max(a)`,`dr_table`.`b` AS `b` from (/* select#2 */ select max(`test`.`t1`.`a`) AS `max(a)`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (3),(5)) `tvc_0`) where 1 group by `test`.`t1`.`b`) `dr_table`
Note 1003 /* select#1 */ select `dr_table`.`max(a)` AS `max(a)`,`dr_table`.`b` AS `b` from (/* select#2 */ select max(`test`.`t1`.`a`) AS `max(a)`,`test`.`t1`.`b` AS `b` from (values (3),(5)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`b` group by `test`.`t1`.`b`) `dr_table`
explain extended select * from
(
select max(a),b
@ -464,13 +489,12 @@ as tvc_0
group by b
) as dr_table;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 9 100.00
2 DERIVED t1 ALL NULL NULL NULL NULL 6 100.00 Using temporary; Using filesort
2 DERIVED <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 MATERIALIZED <derived4> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 100.00
2 DERIVED t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort
2 DERIVED <derived4> eq_ref distinct_key distinct_key 4 test.t1.b 1 100.00
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `dr_table`.`max(a)` AS `max(a)`,`dr_table`.`b` AS `b` from (/* select#2 */ select max(`test`.`t1`.`a`) AS `max(a)`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (3),(5)) `tvc_0`) where 1 group by `test`.`t1`.`b`) `dr_table`
Note 1003 /* select#1 */ select `dr_table`.`max(a)` AS `max(a)`,`dr_table`.`b` AS `b` from (/* select#2 */ select max(`test`.`t1`.`a`) AS `max(a)`,`test`.`t1`.`b` AS `b` from (values (3),(5)) `tvc_0` join `test`.`t1` where `tvc_0`.`3` = `test`.`t1`.`b` group by `test`.`t1`.`b`) `dr_table`
# prepare statement
prepare stmt from "select * from t1 where a in (1,2)";
execute stmt;
@ -506,12 +530,11 @@ a b
4 yq
explain extended select * from t3 where a in (1,4);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY <derived3> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t3 ref idx idx 5 tvc_0._col_1 3 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t3` semi join ((values (1),(4)) `tvc_0`) where `test`.`t3`.`a` = `tvc_0`.`_col_1`
Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from (values (1),(4)) `tvc_0` join `test`.`t3` where `test`.`t3`.`a` = `tvc_0`.`_col_1`
# use vectors in IN predeicate
set @@in_predicate_conversion_threshold= 4;
select * from t1 where (a,b) in ((1,2),(3,4));
@ -519,12 +542,11 @@ a b
1 2
explain extended select * from t1 where (a,b) in ((1,2),(3,4));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.b 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1,2),(3,4)) `tvc_0`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1,2),(3,4)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a` and `tvc_0`.`_col_2` = `test`.`t1`.`b`
set @@in_predicate_conversion_threshold= 2;
# transformation works for the one IN predicate and doesn't work for the other
set @@in_predicate_conversion_threshold= 5;
@ -539,10 +561,10 @@ where (a,b) in ((1,2),(8,9)) and
(a,c) in ((1,3),(8,0),(5,1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived3> ref key0 key0 8 test.t2.a,test.t2.c 2 100.00 FirstMatch(t2)
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 8 test.t2.a,test.t2.c 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t2` semi join ((values (1,3),(8,0),(5,1)) `tvc_0`) where `tvc_0`.`_col_1` = `test`.`t2`.`a` and `tvc_0`.`_col_2` = `test`.`t2`.`c` and (`test`.`t2`.`a`,`test`.`t2`.`b`) in (<cache>((1,2)),<cache>((8,9)))
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c` from (values (1,3),(8,0),(5,1)) `tvc_0` join `test`.`t2` where `tvc_0`.`_col_1` = `test`.`t2`.`a` and `tvc_0`.`_col_2` = `test`.`t2`.`c` and (`test`.`t2`.`a`,`test`.`t2`.`b`) in (<cache>((1,2)),<cache>((8,9)))
set @@in_predicate_conversion_threshold= 2;
#
# mdev-14281: conversion of NOT IN predicate into subquery predicate
@ -567,18 +589,18 @@ explain extended select * from t1
where (a,b) not in ((1,2),(8,9), (5,1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> index_subquery key0 key0 8 func,func 2 100.00 Using where; Full scan on NULL key
2 DEPENDENT SUBQUERY <derived3> unique_subquery distinct_key distinct_key 8 func,func 1 100.00 Using where; Full scan on NULL key
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where !<expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`>(<in_optimizer>((`test`.`t1`.`a`,`test`.`t1`.`b`),<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in (temporary) on key0 where trigcond(<cache>(`test`.`t1`.`a`) = `tvc_0`.`_col_1`) and trigcond(<cache>(`test`.`t1`.`b`) = `tvc_0`.`_col_2`)))))
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where !<expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`>(<in_optimizer>((`test`.`t1`.`a`,`test`.`t1`.`b`),<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a`) in <temporary table> on distinct_key where trigcond(<cache>(`test`.`t1`.`a`) = `tvc_0`.`_col_1`) and trigcond(<cache>(`test`.`t1`.`b`) = `tvc_0`.`_col_2`)))))
explain extended select * from t1
where (a,b) not in (select * from (values (1,2),(8,9), (5,1)) as tvc_0);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> index_subquery key0 key0 8 func,func 2 100.00 Using where; Full scan on NULL key
2 DEPENDENT SUBQUERY <derived3> unique_subquery distinct_key distinct_key 8 func,func 1 100.00 Using where; Full scan on NULL key
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where !<expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`>(<in_optimizer>((`test`.`t1`.`a`,`test`.`t1`.`b`),<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in (temporary) on key0 where trigcond(<cache>(`test`.`t1`.`a`) = `tvc_0`.`1`) and trigcond(<cache>(`test`.`t1`.`b`) = `tvc_0`.`2`)))))
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where !<expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`>(<in_optimizer>((`test`.`t1`.`a`,`test`.`t1`.`b`),<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a`) in <temporary table> on distinct_key where trigcond(<cache>(`test`.`t1`.`a`) = `tvc_0`.`1`) and trigcond(<cache>(`test`.`t1`.`b`) = `tvc_0`.`2`)))))
select * from t1
where b < 7 and (a,b) not in ((1,2),(8,9), (5,1));
a b
@ -589,10 +611,10 @@ explain extended select * from t1
where b < 7 and (a,b) not in ((1,2),(8,9), (5,1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> index_subquery key0 key0 8 func,func 2 100.00 Using where; Full scan on NULL key
2 DEPENDENT SUBQUERY <derived3> unique_subquery distinct_key distinct_key 8 func,func 1 100.00 Using where; Full scan on NULL key
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where `test`.`t1`.`b` < 7 and !<expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`>(<in_optimizer>((`test`.`t1`.`a`,`test`.`t1`.`b`),<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in (temporary) on key0 where trigcond(<cache>(`test`.`t1`.`a`) = `tvc_0`.`_col_1`) and trigcond(<cache>(`test`.`t1`.`b`) = `tvc_0`.`_col_2`)))))
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where `test`.`t1`.`b` < 7 and !<expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`>(<in_optimizer>((`test`.`t1`.`a`,`test`.`t1`.`b`),<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a`) in <temporary table> on distinct_key where trigcond(<cache>(`test`.`t1`.`a`) = `tvc_0`.`_col_1`) and trigcond(<cache>(`test`.`t1`.`b`) = `tvc_0`.`_col_2`)))))
select * from t2
where (a,c) not in ((1,2),(8,9), (5,1));
a b c
@ -605,10 +627,10 @@ explain extended select * from t2
where (a,c) not in ((1,2),(8,9), (5,1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> index_subquery key0 key0 8 func,func 2 100.00 Using where; Full scan on NULL key
2 DEPENDENT SUBQUERY <derived3> unique_subquery distinct_key distinct_key 8 func,func 1 100.00 Using where; Full scan on NULL key
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t2` where !<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`c`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`c`),<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in (temporary) on key0 where trigcond(<cache>(`test`.`t2`.`a`) = `tvc_0`.`_col_1`) and trigcond(<cache>(`test`.`t2`.`c`) = `tvc_0`.`_col_2`)))))
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t2` where !<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`c`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`c`),<exists>(<primary_index_lookup>(<cache>(`test`.`t2`.`a`) in <temporary table> on distinct_key where trigcond(<cache>(`test`.`t2`.`a`) = `tvc_0`.`_col_1`) and trigcond(<cache>(`test`.`t2`.`c`) = `tvc_0`.`_col_2`)))))
drop table t1, t2, t3;
set @@in_predicate_conversion_threshold= default;
#

17
mysql-test/main/opt_tvc.test
View File

@ -54,6 +54,23 @@ eval $optimized_query;
eval explain extended $query;
eval explain extended $optimized_query;
let $query= select * from t1 where a in (1,2,2,2,3,4,5,6,7);
let $optimized_query=
select * from t1
where a in
(
select *
from (values (1),(2),(2),(2),(2),(3),(4),(5),(6),(7)) as tvc_0
);
eval $query;
eval $optimized_query;
eval explain extended $query;
eval explain extended $optimized_query;
--echo # AND-condition with IN-predicates in WHERE-part
let $query=

8
mysql-test/main/set_operation.result
View File

@ -221,7 +221,7 @@ NULL UNIT RESULT <unit8,9,12> ALL NULL NULL NULL NULL NULL NULL
16 EXCEPT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNIT RESULT <unit1,15,16> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 /* select#1 */ select `__14`.`1` AS `1` from (/* select#8 */ select `__7`.`1` AS `1` from (/* select#2 */ select 1 AS `1` except /* select#3 */ select 5 AS `5` union /* select#4 */ select 6 AS `6`) `__7` union /* select#9 */ select `__8`.`2` AS `2` from (/* select#5 */ select 2 AS `2` intersect /* select#6 */ select 3 AS `3` intersect /* select#7 */ select 4 AS `4`) `__8` except /* select#12 */ select `__11`.`7` AS `7` from (/* select#10 */ select 7 AS `7` intersect /* select#11 */ select 8 AS `8`) `__11`) `__14` union all /* select#15 */ select `__15`.`9` AS `9` from (/* select#13 */ select 9 AS `9` union all /* select#14 */ select 10 AS `10`) `__15` except all /* select#16 */ select 11 AS `11`
Note 1003 /* select#1 */ select `__14`.`1` AS `1` from (/* select#8 */ select `__7`.`1` AS `1` from (/* select#2 */ select 1 AS `1` except /* select#3 */ select 5 AS `5` union all /* select#4 */ select 6 AS `6`) `__7` union /* select#9 */ select `__8`.`2` AS `2` from (/* select#5 */ select 2 AS `2` intersect /* select#6 */ select 3 AS `3` intersect /* select#7 */ select 4 AS `4`) `__8` except /* select#12 */ select `__11`.`7` AS `7` from (/* select#10 */ select 7 AS `7` intersect /* select#11 */ select 8 AS `8`) `__11`) `__14` union all /* select#15 */ select `__15`.`9` AS `9` from (/* select#13 */ select 9 AS `9` union all /* select#14 */ select 10 AS `10`) `__15` except all /* select#16 */ select 11 AS `11`
(select 1 union all select 2)
union
(select 3 union all select 4);
@ -242,7 +242,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
5 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union1,6> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 /* select#1 */ select `__5`.`1` AS `1` from (/* select#2 */ select 1 AS `1` union /* select#3 */ select 2 AS `2`) `__5` union /* select#6 */ select `__6`.`3` AS `3` from (/* select#4 */ select 3 AS `3` union /* select#5 */ select 4 AS `4`) `__6`
Note 1003 /* select#1 */ select `__5`.`1` AS `1` from (/* select#2 */ select 1 AS `1` union all /* select#3 */ select 2 AS `2`) `__5` union /* select#6 */ select `__6`.`3` AS `3` from (/* select#4 */ select 3 AS `3` union /* select#5 */ select 4 AS `4`) `__6`
(select 1 intersect all select 2)
except
select 3;
@ -258,7 +258,7 @@ NULL INTERSECT RESULT <intersect2,3> ALL NULL NULL NULL NULL NULL NULL
4 EXCEPT NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL EXCEPT RESULT <except1,4> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 /* select#1 */ select `__4`.`1` AS `1` from (/* select#2 */ select 1 AS `1` intersect /* select#3 */ select 2 AS `2`) `__4` except /* select#4 */ select 3 AS `3`
Note 1003 /* select#1 */ select `__4`.`1` AS `1` from (/* select#2 */ select 1 AS `1` intersect all /* select#3 */ select 2 AS `2`) `__4` except /* select#4 */ select 3 AS `3`
(select 1 intersect all select 2 intersect all select 3)
intersect
(select 4 intersect all select 5);
@ -278,7 +278,7 @@ NULL INTERSECT RESULT <intersect2,3,4> ALL NULL NULL NULL NULL NULL NULL
NULL INTERSECT RESULT <intersect5,6> ALL NULL NULL NULL NULL NULL NULL
NULL INTERSECT RESULT <intersect1,7> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 /* select#1 */ select `__6`.`1` AS `1` from (/* select#2 */ select 1 AS `1` intersect /* select#3 */ select 2 AS `2` intersect /* select#4 */ select 3 AS `3`) `__6` intersect /* select#7 */ select `__7`.`4` AS `4` from (/* select#5 */ select 4 AS `4` intersect /* select#6 */ select 5 AS `5`) `__7`
Note 1003 /* select#1 */ select `__6`.`1` AS `1` from (/* select#2 */ select 1 AS `1` intersect all /* select#3 */ select 2 AS `2` intersect all /* select#4 */ select 3 AS `3`) `__6` intersect /* select#7 */ select `__7`.`4` AS `4` from (/* select#5 */ select 4 AS `4` intersect /* select#6 */ select 5 AS `5`) `__7`
# test set operations with table value constructor
(values (1,1),(1,1),(1,1),(2,2),(2,2),(3,3),(9,9))
INTERSECT ALL

60
mysql-test/main/table_value_constr.result
View File

@ -743,21 +743,19 @@ a b
explain extended select * from t1
where a in (values (1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 MATERIALIZED <derived2> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived2> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1)) `tvc_0`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
explain extended select * from t1
where a in (select * from (values (1)) as tvc_0);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1)) `tvc_0`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
# IN-subquery with VALUES structure(s) : UNION with VALUES on the first place
select * from t1
where a in (values (1) union select 2);
@ -776,7 +774,7 @@ explain extended select * from t1
where a in (values (1) union select 2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
4 DEPENDENT SUBQUERY <derived2> ref key0 key0 4 func 2 100.00
4 DEPENDENT SUBQUERY <derived2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union4,3> ALL NULL NULL NULL NULL NULL NULL
@ -787,7 +785,7 @@ where a in (select * from (values (1)) as tvc_0 union
select 2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> ref key0 key0 4 func 2 100.00
2 DEPENDENT SUBQUERY <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,4> ALL NULL NULL NULL NULL NULL NULL
@ -812,7 +810,7 @@ where a in (select 2 union values (1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 DEPENDENT UNION <derived3> ref key0 key0 4 func 2 100.00
4 DEPENDENT UNION <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,4> ALL NULL NULL NULL NULL NULL NULL
Warnings:
@ -848,7 +846,7 @@ explain extended select * from t1
where a in (values (1) union all select b from t1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
4 DEPENDENT SUBQUERY <derived2> ref key0 key0 4 func 2 100.00
4 DEPENDENT SUBQUERY <derived2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 DEPENDENT UNION t1 ALL NULL NULL NULL NULL 6 100.00 Using where
Warnings:
@ -858,7 +856,7 @@ where a in (select * from (values (1)) as tvc_0 union all
select b from t1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> ref key0 key0 4 func 2 100.00
2 DEPENDENT SUBQUERY <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 DEPENDENT UNION t1 ALL NULL NULL NULL NULL 6 100.00 Using where
Warnings:
@ -880,18 +878,18 @@ explain extended select * from t1
where a not in (values (1),(2));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
3 MATERIALIZED <derived2> ALL NULL NULL NULL NULL 2 100.00
3 DEPENDENT SUBQUERY <derived2> unique_subquery distinct_key distinct_key 4 func 1 100.00 Using where; Full scan on NULL key
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where !<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#3 */ select `tvc_0`.`1` from (values (1),(2)) `tvc_0` ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where `test`.`t1`.`a` = `<subquery3>`.`1`))))
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where !<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a`) in <temporary table> on distinct_key where trigcond(<cache>(`test`.`t1`.`a`) = `tvc_0`.`1`)))))
explain extended select * from t1
where a not in (select * from (values (1),(2)) as tvc_0);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
2 DEPENDENT SUBQUERY <derived3> unique_subquery distinct_key distinct_key 4 func 1 100.00 Using where; Full scan on NULL key
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where !<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `tvc_0`.`1` from (values (1),(2)) `tvc_0` ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where `test`.`t1`.`a` = `<subquery2>`.`1`))))
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where !<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a`) in <temporary table> on distinct_key where trigcond(<cache>(`test`.`t1`.`a`) = `tvc_0`.`1`)))))
# NOT IN subquery with VALUES structure(s) : UNION with VALUES on the first place
select * from t1
where a not in (values (1) union select 2);
@ -978,21 +976,19 @@ a b
explain extended select * from t1
where a = any (values (1),(2));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 MATERIALIZED <derived2> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived2> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
explain extended select * from t1
where a = any (select * from (values (1),(2)) as tvc_0);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
# ANY-subquery with VALUES structure(s) : UNION with VALUES on the first place
select * from t1
where a = any (values (1) union select 2);
@ -1011,7 +1007,7 @@ explain extended select * from t1
where a = any (values (1) union select 2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
4 DEPENDENT SUBQUERY <derived2> ref key0 key0 4 func 2 100.00
4 DEPENDENT SUBQUERY <derived2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union4,3> ALL NULL NULL NULL NULL NULL NULL
@ -1022,7 +1018,7 @@ where a = any (select * from (values (1)) as tvc_0 union
select 2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> ref key0 key0 4 func 2 100.00
2 DEPENDENT SUBQUERY <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,4> ALL NULL NULL NULL NULL NULL NULL
@ -1047,7 +1043,7 @@ where a = any (select 2 union values (1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 DEPENDENT UNION <derived3> ref key0 key0 4 func 2 100.00
4 DEPENDENT UNION <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,4> ALL NULL NULL NULL NULL NULL NULL
Warnings:
@ -1140,7 +1136,7 @@ where a = any (select 1 union values (1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 DEPENDENT UNION <derived3> ref key0 key0 4 func 2 100.00
4 DEPENDENT UNION <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,4> ALL NULL NULL NULL NULL NULL NULL
Warnings:
@ -2688,9 +2684,9 @@ a
explain extended select a from t1 where a in (values (7) union values (8));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
4 DEPENDENT SUBQUERY <derived2> ref key0 key0 4 func 2 100.00
4 DEPENDENT SUBQUERY <derived2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
5 DEPENDENT UNION <derived3> ref key0 key0 4 func 2 100.00
5 DEPENDENT UNION <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union4,5> ALL NULL NULL NULL NULL NULL NULL
Warnings:
@ -2951,6 +2947,8 @@ values ((values (4)), (select 5)), ((select 2), (values (8)));
values ((values (1) union values (1)));
(values (1) union values (1))
1
values ((values (1) union all values (1)));
ERROR 21000: Subquery returns more than 1 row
values ((values (1) union values (1) union values (1)));
(values (1) union values (1) union values (1))
1

3
mysql-test/main/table_value_constr.test
View File

@ -1575,6 +1575,9 @@ values ((values (4)), (select 5)), ((select 2), (values (8)));
values ((values (1) union values (1)));
--error ER_SUBQUERY_NO_1_ROW
values ((values (1) union all values (1)));
values ((values (1) union values (1) union values (1)));
values ((values ((values (4)))));

67
mysql-test/main/union.result
View File

@ -2783,3 +2783,70 @@ drop table t1;
#
# End of 10.3 tests
#
# check union all & union disctinct
select 1 as res union select 2 union select 1 union select 2;
res
1
2
select 1 as res union distinct select 2 union distinct select 1 union distinct select 2;
res
1
2
select 1 as res union all select 2 union all select 1 union all select 2;
res
1
2
1
2
select truncate(seq/2,0)+1 as res from seq_1_to_6 union select 2;
res
1
2
3
4
select truncate(seq/2,0)+1 as res from seq_1_to_6 union distinct select 2;
res
1
2
3
4
select truncate(seq/2,0)+1 as res from seq_1_to_6 union all select 2;
res
1
2
2
3
3
4
2
select 1 as res union all select 2 union distinct select 1 union all select 2;
res
1
2
2
select 1 as res union select 2 union all select 1 union distinct select 3;
res
1
2
3
select 1 as res union select 2 union all select 1 union distinct select 3 union all select 2;
res
1
2
3
2
select 1 as res union select 2 union all select 1 union distinct select 3 union all select 2 union distinct select 5;
res
1
2
3
5
select truncate(seq/2,0)+1 as res from seq_1_to_6 union all select 2 union all select 1 union distinct select 3 union all select 2;
res
1
2
3
4
2

20
mysql-test/main/union.test
View File

@ -1,6 +1,8 @@
#
# Test of unions
#
--source include/have_sequence.inc
CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');
@ -2010,3 +2012,21 @@ drop table t1;
--echo #
--echo # End of 10.3 tests
--echo #
--echo
--echo # check union all & union disctinct
--echo
select 1 as res union select 2 union select 1 union select 2;
select 1 as res union distinct select 2 union distinct select 1 union distinct select 2;
select 1 as res union all select 2 union all select 1 union all select 2;
select truncate(seq/2,0)+1 as res from seq_1_to_6 union select 2;
select truncate(seq/2,0)+1 as res from seq_1_to_6 union distinct select 2;
select truncate(seq/2,0)+1 as res from seq_1_to_6 union all select 2;
select 1 as res union all select 2 union distinct select 1 union all select 2;
select 1 as res union select 2 union all select 1 union distinct select 3;
select 1 as res union select 2 union all select 1 union distinct select 3 union all select 2;
select 1 as res union select 2 union all select 1 union distinct select 3 union all select 2 union distinct select 5;
select truncate(seq/2,0)+1 as res from seq_1_to_6 union all select 2 union all select 1 union distinct select 3 union all select 2;

54
mysql-test/suite/compat/oracle/r/table_value_constr.result
View File

@ -741,21 +741,19 @@ a b
explain extended select * from t1
where a in (values (1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 MATERIALIZED <derived2> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived2> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" semi join ((values (1)) "tvc_0") where 1
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from (values (1)) "tvc_0" join "test"."t1" where "tvc_0"."1" = "test"."t1"."a"
explain extended select * from t1
where a in (select * from (values (1)) as tvc_0);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" semi join ((values (1)) "tvc_0") where 1
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from (values (1)) "tvc_0" join "test"."t1" where "tvc_0"."1" = "test"."t1"."a"
# IN-subquery with VALUES structure(s) : UNION with VALUES on the first place
select * from t1
where a in (values (1) union select 2);
@ -774,7 +772,7 @@ explain extended select * from t1
where a in (values (1) union select 2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
4 DEPENDENT SUBQUERY <derived2> ref key0 key0 4 func 2 100.00
4 DEPENDENT SUBQUERY <derived2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union4,3> ALL NULL NULL NULL NULL NULL NULL
@ -785,7 +783,7 @@ where a in (select * from (values (1)) as tvc_0 union
select 2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> ref key0 key0 4 func 2 100.00
2 DEPENDENT SUBQUERY <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,4> ALL NULL NULL NULL NULL NULL NULL
@ -810,7 +808,7 @@ where a in (select 2 union values (1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 DEPENDENT UNION <derived3> ref key0 key0 4 func 2 100.00
4 DEPENDENT UNION <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,4> ALL NULL NULL NULL NULL NULL NULL
Warnings:
@ -846,7 +844,7 @@ explain extended select * from t1
where a in (values (1) union all select b from t1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
4 DEPENDENT SUBQUERY <derived2> ref key0 key0 4 func 2 100.00
4 DEPENDENT SUBQUERY <derived2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 DEPENDENT UNION t1 ALL NULL NULL NULL NULL 6 100.00 Using where
Warnings:
@ -856,7 +854,7 @@ where a in (select * from (values (1)) as tvc_0 union all
select b from t1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> ref key0 key0 4 func 2 100.00
2 DEPENDENT SUBQUERY <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 DEPENDENT UNION t1 ALL NULL NULL NULL NULL 6 100.00 Using where
Warnings:
@ -878,18 +876,18 @@ explain extended select * from t1
where a not in (values (1),(2));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
3 MATERIALIZED <derived2> ALL NULL NULL NULL NULL 2 100.00
3 DEPENDENT SUBQUERY <derived2> unique_subquery distinct_key distinct_key 4 func 1 100.00 Using where; Full scan on NULL key
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" where !<expr_cache><"test"."t1"."a">(<in_optimizer>("test"."t1"."a","test"."t1"."a" in ( <materialize> (/* select#3 */ select "tvc_0"."1" from (values (1),(2)) "tvc_0" ), <primary_index_lookup>("test"."t1"."a" in <temporary table> on distinct_key where "test"."t1"."a" = "<subquery3>"."1"))))
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" where !<expr_cache><"test"."t1"."a">(<in_optimizer>("test"."t1"."a",<exists>(<primary_index_lookup>(<cache>("test"."t1"."a") in <temporary table> on distinct_key where trigcond(<cache>("test"."t1"."a") = "tvc_0"."1")))))
explain extended select * from t1
where a not in (select * from (values (1),(2)) as tvc_0);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
2 DEPENDENT SUBQUERY <derived3> unique_subquery distinct_key distinct_key 4 func 1 100.00 Using where; Full scan on NULL key
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" where !<expr_cache><"test"."t1"."a">(<in_optimizer>("test"."t1"."a","test"."t1"."a" in ( <materialize> (/* select#2 */ select "tvc_0"."1" from (values (1),(2)) "tvc_0" ), <primary_index_lookup>("test"."t1"."a" in <temporary table> on distinct_key where "test"."t1"."a" = "<subquery2>"."1"))))
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" where !<expr_cache><"test"."t1"."a">(<in_optimizer>("test"."t1"."a",<exists>(<primary_index_lookup>(<cache>("test"."t1"."a") in <temporary table> on distinct_key where trigcond(<cache>("test"."t1"."a") = "tvc_0"."1")))))
# NOT IN subquery with VALUES structure(s) : UNION with VALUES on the first place
select * from t1
where a not in (values (1) union select 2);
@ -976,21 +974,19 @@ a b
explain extended select * from t1
where a = any (values (1),(2));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 MATERIALIZED <derived2> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived2> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" semi join ((values (1),(2)) "tvc_0") where 1
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from (values (1),(2)) "tvc_0" join "test"."t1" where "tvc_0"."1" = "test"."t1"."a"
explain extended select * from t1
where a = any (select * from (values (1),(2)) as tvc_0);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" semi join ((values (1),(2)) "tvc_0") where 1
Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from (values (1),(2)) "tvc_0" join "test"."t1" where "tvc_0"."1" = "test"."t1"."a"
# ANY-subquery with VALUES structure(s) : UNION with VALUES on the first place
select * from t1
where a = any (values (1) union select 2);
@ -1009,7 +1005,7 @@ explain extended select * from t1
where a = any (values (1) union select 2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
4 DEPENDENT SUBQUERY <derived2> ref key0 key0 4 func 2 100.00
4 DEPENDENT SUBQUERY <derived2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union4,3> ALL NULL NULL NULL NULL NULL NULL
@ -1020,7 +1016,7 @@ where a = any (select * from (values (1)) as tvc_0 union
select 2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY <derived3> ref key0 key0 4 func 2 100.00
2 DEPENDENT SUBQUERY <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,4> ALL NULL NULL NULL NULL NULL NULL
@ -1045,7 +1041,7 @@ where a = any (select 2 union values (1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 DEPENDENT UNION <derived3> ref key0 key0 4 func 2 100.00
4 DEPENDENT UNION <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,4> ALL NULL NULL NULL NULL NULL NULL
Warnings:
@ -1138,7 +1134,7 @@ where a = any (select 1 union values (1));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
4 DEPENDENT UNION <derived3> ref key0 key0 4 func 2 100.00
4 DEPENDENT UNION <derived3> eq_ref distinct_key distinct_key 4 func 1 100.00
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,4> ALL NULL NULL NULL NULL NULL NULL
Warnings:

2
mysql-test/suite/federated/federatedx_create_handlers.result
View File

@ -298,7 +298,7 @@ SELECT * FROM federated.t1 WHERE id >= 5) t
WHERE federated.t3.name=t.name;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t3 ALL NULL NULL NULL NULL 7
1 PRIMARY <derived2> ref key0 key0 18 federated.t3.name 2
1 PRIMARY <derived2> ref key1 key1 18 federated.t3.name 2
2 PUSHED DERIVED NULL NULL NULL NULL NULL NULL NULL NULL
#
# MDEV-21887: federatedx crashes on SELECT ... INTO query in select_handler code

46
sql/item_subselect.cc
View File

@ -1588,8 +1588,9 @@ Item_exists_subselect::Item_exists_subselect(THD *thd,
{
DBUG_ENTER("Item_exists_subselect::Item_exists_subselect");
init(select_lex, new (thd->mem_root) select_exists_subselect(thd, this));
select_lex->distinct= 1;
select_lex->master_unit()->distinct= 1;
max_columns= UINT_MAX;
null_value= FALSE; //can't be NULL
base_flags&= ~item_base_t::MAYBE_NULL; //can't be NULL
@ -1640,6 +1641,39 @@ Item_in_subselect::Item_in_subselect(THD *thd, Item * left_exp,
Item_row(thd, static_cast<Item_row*>(left_exp));
func= &eq_creator;
init(select_lex, new (thd->mem_root) select_exists_subselect(thd, this));
select_lex->distinct= 1;
/*
If the IN subquery (xxx IN (SELECT ...) is a join without grouping,
we don't need duplicates from the tables it is joining. These
tables can be derived tables, like shown in the following
example. In this case, it's useful to indicate that we don't need
duplicates from them either.
Example:
col IN (SELECT ... -- this is the select_lex
FROM
(SELECT ... FROM t1) AS t1, -- child1, first_inner_init().
(SELECT ... FROM t2) AS t2, -- child2
WHERE
...
)
We don't need duplicates from either child1 or child2.
We only indicate this to child1 (select_lex->first_inner_unit()), as that
catches most of practically important use cases.
(The check for item==NULL is to make sure the subquery is a derived table
and not any other kind of subquery like another IN (SELECT ...) or a scalar-
context (SELECT 'foo'))
*/
select_lex->master_unit()->distinct= 1;
if (!select_lex->with_sum_func &&
select_lex->first_inner_unit() &&
select_lex->first_inner_unit()->item == NULL)
select_lex->first_inner_unit()->distinct= 1;
max_columns= UINT_MAX;
set_maybe_null();
reset();
@ -1667,6 +1701,16 @@ Item_allany_subselect::Item_allany_subselect(THD *thd, Item * left_exp,
Item_row(thd, static_cast<Item_row*>(left_exp));
func= func_creator(all_arg);
init(select_lex, new (thd->mem_root) select_exists_subselect(thd, this));
select_lex->distinct= 1;
/*
If this is is 'xxx IN (SELECT ...) mark that the we are only interested in
unique values for the select
*/
select_lex->master_unit()->distinct= 1;
if (!select_lex->with_sum_func &&
select_lex->first_inner_unit() &&
select_lex->first_inner_unit()->item == NULL)
select_lex->first_inner_unit()->distinct= 1;
max_columns= 1;
reset();
//if test_limit will fail then error will be reported to client

12
sql/sql_derived.cc
View File

@ -870,18 +870,20 @@ bool mysql_derived_prepare(THD *thd, LEX *lex, TABLE_LIST *derived)
goto exit;
/*
Temp table is created so that it hounours if UNION without ALL is to be
Temp table is created so that it honors if UNION without ALL is to be
processed
As 'distinct' parameter we always pass FALSE (0), because underlying
query will control distinct condition by itself. Correct test of
distinct underlying query will be is_unit_op &&
As 'distinct' parameter we pass unit->distinct, which tells us if
the values should be uniq.
Note that the underlying query will also control distinct condition.
Correct test of distinct underlying query will be is_unit_op &&
!unit->union_distinct->next_select() (i.e. it is union and last distinct
SELECT is last SELECT of UNION).
*/
thd->create_tmp_table_for_derived= TRUE;
if (!(derived->table) &&
derived->derived_result->create_result_table(thd, &unit->types, FALSE,
derived->derived_result->create_result_table(thd, &unit->types,
unit->distinct,
(first_select->options |
thd->variables.option_bits |
TMP_TABLE_ALL_COLUMNS),

4
sql/sql_lex.cc
View File

@ -2873,7 +2873,7 @@ void st_select_lex_node::init_query_common()
{
options= 0;
set_linkage(UNSPECIFIED_TYPE);
distinct= TRUE;
distinct= FALSE;
no_table_names_allowed= 0;
uncacheable= 0;
}
@ -10146,6 +10146,7 @@ SELECT_LEX_UNIT *LEX::parsed_select_expr_start(SELECT_LEX *s1, SELECT_LEX *s2,
if (res == NULL)
return NULL;
res->pre_last_parse= sel1;
res->distinct= distinct;
push_select(res->fake_select_lex);
return res;
}
@ -10392,7 +10393,6 @@ bool LEX::parsed_TVC_start()
insert_list= 0;
if (!(sel= alloc_select(TRUE)) || push_select(sel))
return true;
sel->init_select();
sel->braces= FALSE; // just initialisation
return false;
}

32
sql/sql_select.cc
View File

@ -2613,8 +2613,12 @@ int JOIN::optimize_stage2()
if (select_lex->handle_derived(thd->lex, DT_OPTIMIZE))
DBUG_RETURN(1);
if (optimizer_flag(thd, OPTIMIZER_SWITCH_DERIVED_WITH_KEYS))
drop_unused_derived_keys();
/*
We have to call drop_unused_derived_keys() even if we don't have any
generated keys (enabled with OPTIMIZER_SWITCH_DERIVED_WITH_KEYS)
as we may still have unique constraints we have to get rid of.
*/
drop_unused_derived_keys();
if (rollup.state != ROLLUP::STATE_NONE)
{
@ -5698,7 +5702,14 @@ make_join_statistics(JOIN *join, List<TABLE_LIST> &tables_list,
base_const_ref.intersect(base_part);
base_eq_part= eq_part;
base_eq_part.intersect(base_part);
if (table->actual_key_flags(keyinfo) & HA_NOSAME)
/*
We can read the const record if we are using a full unique key and
if the table is not an unopened to be materialized table/view.
*/
if ((table->actual_key_flags(keyinfo) & HA_NOSAME) &&
(!s->table->pos_in_table_list->is_materialized_derived() ||
s->table->pos_in_table_list->fill_me))
{
if (base_const_ref == base_eq_part &&
@ -13573,9 +13584,12 @@ void JOIN::drop_unused_derived_keys()
if (tab->ref.key >= 0 && tab->ref.key < MAX_KEY)
tab->ref.key= 0;
else
{
tmp_tbl->s->keys= 0;
tmp_tbl->s->uniques= 0;
}
}
tab->keys= (key_map) (tmp_tbl->s->keys ? 1 : 0);
tab->keys= (key_map) (tmp_tbl->s->keys || tmp_tbl->s->uniques ? 1 : 0);
}
}
@ -22708,12 +22722,16 @@ join_read_const_table(THD *thd, JOIN_TAB *tab, POSITION *pos)
if (tab->table->pos_in_table_list->is_materialized_derived() &&
!tab->table->pos_in_table_list->fill_me)
{
DBUG_ASSERT(0);
//TODO: don't get here at all
/* Skip materialized derived tables/views. */
/*
Skip materialized derived tables/views as they temporary table is not
opened yet.
*/
DBUG_RETURN(0);
}
else if (tab->table->pos_in_table_list->jtbm_subselect &&
tab->table->pos_in_table_list->jtbm_subselect->is_jtbm_const_tab)
else if (tab->table->pos_in_table_list->jtbm_subselect &&
tab->table->pos_in_table_list->jtbm_subselect->is_jtbm_const_tab)
{
/* Row will not be found */
int res;

7
sql/sql_tvc.cc
View File

@ -705,11 +705,11 @@ st_select_lex *wrap_tvc(THD *thd, st_select_lex *tvc_sl,
goto err;
wrapper_sl->select_number= ++thd->lex->stmt_lex->current_select_number;
wrapper_sl->parent_lex= lex; /* Used in init_query. */
wrapper_sl->init_query();
wrapper_sl->init_select();
wrapper_sl->make_empty_select();
wrapper_sl->nest_level= tvc_sl->nest_level;
wrapper_sl->parsing_place= tvc_sl->parsing_place;
wrapper_sl->distinct= tvc_sl->distinct;
wrapper_sl->set_linkage(tvc_sl->get_linkage());
wrapper_sl->exclude_from_table_unique_test=
tvc_sl->exclude_from_table_unique_test;
@ -737,6 +737,7 @@ st_select_lex *wrap_tvc(THD *thd, st_select_lex *tvc_sl,
derived_unit->init_query();
derived_unit->thd= thd;
derived_unit->include_down(wrapper_sl);
derived_unit->distinct= tvc_sl->distinct;
/*
Attach the select used of TVC as the only slave to the unit for
@ -1011,7 +1012,9 @@ Item *Item_func_in::in_predicate_to_in_subs_transformer(THD *thd,
lex->init_select();
tvc_select= lex->current_select;
derived_unit= tvc_select->master_unit();
derived_unit->distinct= 1;
tvc_select->set_linkage(DERIVED_TABLE_TYPE);
tvc_select->distinct= 1;
/* Create TVC used in the transformation */
if (create_value_list_for_tvc(thd, &values))

24
sql/sql_union.cc
View File

@ -1302,6 +1302,7 @@ bool st_select_lex_unit::prepare(TABLE_LIST *derived_arg,
bool instantiate_tmp_table= false;
bool single_tvc= !first_sl->next_select() && first_sl->tvc;
bool single_tvc_wo_order= single_tvc && !first_sl->order_list.elements;
bool distinct_key= 0;
DBUG_ENTER("st_select_lex_unit::prepare");
DBUG_ASSERT(thd == current_thd);
@ -1405,15 +1406,17 @@ bool st_select_lex_unit::prepare(TABLE_LIST *derived_arg,
{
case INTERSECT_TYPE:
have_intersect= TRUE;
if (!s->distinct){
have_except_all_or_intersect_all= true;
}
if (!s->distinct)
have_except_all_or_intersect_all= TRUE;
break;
case EXCEPT_TYPE:
have_except= TRUE;
if (!s->distinct){
if (!s->distinct)
have_except_all_or_intersect_all= TRUE;
}
break;
case DERIVED_TABLE_TYPE:
if (s->distinct)
distinct_key= 1;
break;
default:
break;
@ -1620,7 +1623,8 @@ bool st_select_lex_unit::prepare(TABLE_LIST *derived_arg,
if (join_union_item_types(thd, types, union_part_count + 1))
goto err;
if (union_result->create_result_table(thd, &types,
MY_TEST(union_distinct),
(MY_TEST(union_distinct) ||
distinct_key),
create_options,
&derived_arg->alias, false,
instantiate_tmp_table, false,
@ -1643,7 +1647,7 @@ bool st_select_lex_unit::prepare(TABLE_LIST *derived_arg,
res= derived_arg->derived_result->create_result_table(thd,
&types,
FALSE,
distinct_key,
create_options,
&derived_arg->alias,
FALSE, FALSE,
@ -1767,9 +1771,9 @@ cont:
union_result->create_result_table(thd, &types,
MY_TEST(union_distinct) ||
have_except_all_or_intersect_all ||
have_intersect,
create_options, &empty_clex_str, false,
instantiate_tmp_table, false,
have_intersect || distinct_key,
create_options, &empty_clex_str,
false, instantiate_tmp_table, false,
hidden);
union_result->addon_cnt= hidden;
for (uint i= 0; i < hidden; i++)