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MDEV-20109: Optimizer ignores distinct key created for materialized...

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(Backported to 10.3, addressed review input)

Sj_materialization_picker::check_qep(): fix error in cost/fanout
calculations:
- for each join prefix, add #prefix_rows / TIME_FOR_COMPARE to the cost,
  like best_extension_by_limited_search does
- Remove the fanout produced by the subquery tables.
- Also take into account join condition selectivity

optimize_wo_join_buffering() (used by LooseScan and FirstMatch)
- also add #prefix_rows / TIME_FOR_COMPARE to the cost of each prefix.
- Also take into account join condition selectivity
This commit is contained in:
Sergei Petrunia 2019-08-29 15:37:49 +03:00
parent d58437d195
commit ef76f81c98
27 changed files with 392 additions and 295 deletions
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142
mysql-test/main/analyze_stmt_privileges2.result
View File

@ -376,13 +376,13 @@ SELECT * FROM t1 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM t1 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM t1 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 4.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 4.00 100.00 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 0.00 100.00 100.00
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
#------------------------------------------------------------------------
# I/R/U/D/S on the inner view
@ -491,14 +491,14 @@ SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 8.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 8.00 100.00 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 NULL 100.00 NULL
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 NULL 100.00 NULL
#------------------------------------------------------------------------
# I/R/U/D/S on the outer view
# Expectation: Can run everything
@ -598,14 +598,14 @@ SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 12 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 12 12.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 12 12.00 100.00 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 NULL 100.00 NULL
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 NULL 100.00 NULL
#========================================================================
# Test: Grant INSERT on the table
@ -1591,14 +1591,14 @@ SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 4.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 4.00 100.00 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 NULL 100.00 NULL
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 NULL 100.00 NULL
#------------------------------------------------------------------------
# I/R/U/D/S on the outer view
# Expectation: Can run everything: SELECT access to the column `a`
@ -1708,14 +1708,14 @@ SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 8.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 8.00 100.00 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 NULL 100.00 NULL
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 NULL 100.00 NULL
#========================================================================
# Test: Grant SELECT, INSERT, UPDATE, DELETE on the table
@ -1940,14 +1940,14 @@ SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 4.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 4.00 100.00 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 NULL 100.00 NULL
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 NULL 100.00 NULL
#------------------------------------------------------------------------
# I/R/U/D/S on the outer view
# Expectation: Can run everything
@ -2048,14 +2048,14 @@ SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 8.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 8 8.00 100.00 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 NULL 100.00 NULL
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 NULL 100.00 NULL
#########################################################################
# Inner view permission tests
@ -2697,14 +2697,14 @@ SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 14 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 14 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 14 14.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 14 14.00 100.00 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 NULL 100.00 NULL
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 NULL 100.00 NULL
#------------------------------------------------------------------------
# I/R/U/D/S on the outer view
# Expectation: Can run everything
@ -2804,14 +2804,14 @@ SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 18 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 18 18.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 18 18.00 100.00 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 NULL 100.00 NULL
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 NULL 100.00 NULL
#========================================================================
# Test: Grant INSERT on the inner view
@ -3987,14 +3987,14 @@ SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 35 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 35 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM v1 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 35 35.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 35 35.00 100.00 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 NULL 100.00 NULL
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 NULL 100.00 NULL
#------------------------------------------------------------------------
# I/R/U/D/S on the outer view
# Expectation: Can run everything
@ -4094,14 +4094,14 @@ SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 39 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 39 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 39 39.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 39 39.00 100.00 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 NULL 100.00 NULL
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 NULL 100.00 NULL
#########################################################################
# Outer view permission tests
@ -4614,14 +4614,14 @@ SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 39 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 39 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 39 39.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 39 39.00 100.00 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 NULL 100.00 NULL
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 NULL 100.00 NULL
#========================================================================
# Test: Grant INSERT on the outer view
@ -5221,14 +5221,14 @@ SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
a b
EXPLAIN SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 44 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 44 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
ANALYZE SELECT * FROM v2 WHERE a IN ( SELECT a FROM t2 );
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 3.00 100.00 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 44 44.00 100.00 0.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00 Using where
1 PRIMARY t1 ALL NULL NULL NULL NULL 44 44.00 100.00 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 NULL 100.00 NULL
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 NULL 100.00 NULL
disconnect con1;
connection default;
DROP USER 'privtest'@localhost;

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

@ -1159,9 +1159,9 @@ with cte as
union
(select a from t1 where a < 2);
a
7
5
4
5
7
1
prepare stmt from "with cte as
(select a from t1 where a between 4 and 7 group by a)
@ -1170,15 +1170,15 @@ union
(select a from t1 where a < 2)";
execute stmt;
a
7
5
4
5
7
1
execute stmt;
a
7
5
4
5
7
1
deallocate prepare stmt;
with cte as
@ -1188,9 +1188,9 @@ union
(select a from cte where exists( select a from t1 where cte.a=t1.a ));
a
1
7
5
4
5
7
prepare stmt from "with cte as
(select a from t1 where a between 4 and 7 group by a)
(select a from t1 where a < 2)
@ -1199,15 +1199,15 @@ union
execute stmt;
a
1
7
5
4
5
7
execute stmt;
a
1
7
5
4
5
7
deallocate prepare stmt;
with cte as
(select a from t1 where a between 4 and 7)

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

@ -1607,7 +1607,8 @@ EXPLAIN SELECT 1 FROM t2 WHERE a IN
(SELECT a FROM t1 USE INDEX (i2) IGNORE INDEX (i2));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 index a a 5 NULL 4 Using index
1 PRIMARY t1 ALL NULL NULL NULL NULL 144 Using where; FirstMatch(t2)
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 144
SET optimizer_switch=@save_optimizer_switch;
DROP TABLE t1, t2;
CREATE TABLE t1(

5
mysql-test/main/index_merge_myisam.result
View File

@ -556,8 +556,9 @@ where exists (select 1 from t2, t3
where t2.a=t1.a and (t3.a=t2.b or t3.b=t2.b or t3.b=t2.b+1));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where
1 PRIMARY t3 ALL a,b NULL NULL NULL 1002 Range checked for each record (index map: 0x3); FirstMatch(t1)
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
2 MATERIALIZED t3 ALL a,b NULL NULL NULL 1002 Range checked for each record (index map: 0x3)
select * from t1
where exists (select 1 from t2, t3
where t2.a=t1.a and (t3.a=t2.b or t3.b=t2.b or t3.b=t2.b+1));

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

@ -727,8 +727,8 @@ SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t index a,b b 7 NULL 10 Using index
1 PRIMARY t1 ref b b 3 test.t.b 2 Using index
1 PRIMARY t2 index NULL PRIMARY 4 NULL 11 Using index; FirstMatch(t)
1 PRIMARY t1 ref b b 3 test.t.b 2 Using index; Start temporary
1 PRIMARY t2 index NULL PRIMARY 4 NULL 11 Using index; End temporary; Using join buffer (flat, BNL join)
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t.a 1 Using index
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
@ -740,8 +740,8 @@ SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t index a,b b 7 NULL 10 Using index
1 PRIMARY t1 ref b b 3 test.t.b 2 Using index
1 PRIMARY t2 index NULL PRIMARY 4 NULL 11 Using index; FirstMatch(t)
1 PRIMARY t1 ref b b 3 test.t.b 2 Using index; Start temporary
1 PRIMARY t2 index NULL PRIMARY 4 NULL 11 Using index; End temporary; Using join buffer (flat, BNL join)
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t.a 1 Using index
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);

72
mysql-test/main/opt_tvc.result
View File

@ -46,12 +46,12 @@ 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 <subquery2> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 `test`.`t1`.`a` = `tvc_0`.`_col_1`
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
explain extended select * from t1
where a in
(
@ -59,12 +59,12 @@ select *
from (values (1),(2)) as tvc_0
);
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 t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 `test`.`t1`.`a` = `tvc_0`.`1`
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
# AND-condition with IN-predicates in WHERE-part
select * from t1
where a in (1,2) and
@ -90,15 +90,15 @@ 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 <subquery4> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 4 func 1 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
4 MATERIALIZED <derived5> ALL NULL NULL NULL NULL 2 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
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 `test`.`t1`.`b` = `tvc_1`.`_col_1`
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
explain extended select * from t1
where a in
(
@ -111,15 +111,15 @@ select *
from (values (1),(5)) as tvc_1
);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery4> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 4 func 1 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
4 MATERIALIZED <derived5> ALL NULL NULL NULL NULL 2 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 2 100.00
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 `test`.`t1`.`b` = `tvc_1`.`1`
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
# subquery with IN-predicate
select * from t1
where a in
@ -206,12 +206,12 @@ 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 <subquery3> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 `test`.`t1`.`a` = `tvc_0`.`_col_1`
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
explain extended select * from
(
select *
@ -224,12 +224,12 @@ as tvc_0
)
) as dr_table;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery3> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 `test`.`t1`.`a` = `tvc_0`.`1`
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
# non-recursive CTE with IN-predicate
with tvc_0 as
(
@ -265,12 +265,12 @@ 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 <subquery3> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 `test`.`t1`.`a` = `tvc_0`.`_col_1`
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
explain extended select * from
(
select *
@ -283,12 +283,12 @@ as tvc_0
)
) as dr_table;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery3> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 `test`.`t1`.`a` = `tvc_0`.`1`
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
# VIEW with IN-predicate
create view v1 as
select *
@ -316,20 +316,20 @@ 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 <subquery3> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 `test`.`t1`.`a` = `tvc_0`.`_col_1`
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
explain extended select * from v2;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery3> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 `test`.`t1`.`a` = `tvc_0`.`1`
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
drop view v1,v2;
# subselect defined by derived table with IN-predicate
select * from t1
@ -519,12 +519,12 @@ 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 <subquery2> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 `test`.`t1`.`a` = `tvc_0`.`_col_1` and `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` semi join ((values (1,2),(3,4)) `tvc_0`) where 1
set @@in_predicate_conversion_threshold= 2;
# trasformation works for the one IN predicate and doesn't work for the other
set @@in_predicate_conversion_threshold= 5;
@ -538,12 +538,12 @@ explain extended select * from t2
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 <subquery2> ALL distinct_key NULL NULL NULL 3 100.00
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1 100.00
2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 3 100.00
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 `test`.`t2`.`a` = `tvc_0`.`_col_1` and `test`.`t2`.`c` = `tvc_0`.`_col_2` and (`tvc_0`.`_col_1`,`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 `test`.`t2` semi join ((values (1,3),(8,0),(5,1)) `tvc_0`) where (`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

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

@ -5688,8 +5688,8 @@ EXPLAIN
SELECT * FROM t1
WHERE EXISTS (SELECT a FROM t2 USE INDEX() WHERE t2.a = t1.a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
SELECT * FROM t1
WHERE EXISTS (SELECT a FROM t2 WHERE t2.a = t1.a);
@ -5699,8 +5699,8 @@ EXPLAIN
SELECT * FROM t1
WHERE EXISTS (SELECT a FROM t2 WHERE t2.a = t1.a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 index idx idx 5 NULL 3 Using index
DROP TABLE t1,t2;
#

18
mysql-test/main/subselect3.result
View File

@ -1139,8 +1139,8 @@ create table t3 (a int);
insert into t3 select A.a + 10*B.a from t0 A, t0 B;
explain select * from t3 where a in (select kp1 from t1 where kp1<20);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using where; Using index; LooseScan
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where
1 PRIMARY t1 ref kp1 kp1 5 test.t3.a 1 Using index; FirstMatch(t3)
create table t4 (pk int primary key);
insert into t4 select a from t3;
explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20
@ -1276,12 +1276,12 @@ insert into t1 select A.a, B.a, 'filler' from t0 A, t0 B;
create table t2 as select * from t1;
explain select * from t2 where a in (select b from t1 where a=3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ref a a 5 const 8 Using index; LooseScan
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where
1 PRIMARY t1 ref a a 10 const,test.t2.a 1 Using index; FirstMatch(t2)
explain select * from t2 where (b,a) in (select a,b from t1 where a=3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ref a a 5 const 8 Using index; LooseScan
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where
1 PRIMARY t1 ref a a 10 const,test.t2.a 1 Using index; FirstMatch(t2)
drop table t1,t2;
set @@optimizer_switch=@save_optimizer_switch;
create table t1 (a int, b int);
@ -1339,9 +1339,9 @@ insert into t2 select * from t2;
explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY X ALL NULL NULL NULL NULL 6 Using where
1 PRIMARY Y ALL NULL NULL NULL NULL 6 Using where
1 PRIMARY Z ALL NULL NULL NULL NULL 6 Using where; FirstMatch(t1)
1 PRIMARY X ALL NULL NULL NULL NULL 6 Using where; Start temporary; Using join buffer (flat, BNL join)
1 PRIMARY Y ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 PRIMARY Z ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (flat, BNL join)
drop table t0,t1,t2;
set @@optimizer_switch=@save_optimizer_switch;

20
mysql-test/main/subselect3_jcl6.result
View File

@ -1149,8 +1149,8 @@ create table t3 (a int);
insert into t3 select A.a + 10*B.a from t0 A, t0 B;
explain select * from t3 where a in (select kp1 from t1 where kp1<20);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using where; Using index; LooseScan
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where
1 PRIMARY t1 ref kp1 kp1 5 test.t3.a 1 Using index; FirstMatch(t3)
create table t4 (pk int primary key);
insert into t4 select a from t3;
explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20
@ -1286,12 +1286,12 @@ insert into t1 select A.a, B.a, 'filler' from t0 A, t0 B;
create table t2 as select * from t1;
explain select * from t2 where a in (select b from t1 where a=3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ref a a 5 const 8 Using index; LooseScan
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where
1 PRIMARY t1 ref a a 10 const,test.t2.a 1 Using index; FirstMatch(t2)
explain select * from t2 where (b,a) in (select a,b from t1 where a=3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ref a a 5 const 8 Using index; LooseScan
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where
1 PRIMARY t1 ref a a 10 const,test.t2.a 1 Using index; FirstMatch(t2)
drop table t1,t2;
set @@optimizer_switch=@save_optimizer_switch;
create table t1 (a int, b int);
@ -1348,10 +1348,10 @@ create table t2 as select a as a, a as b from t0 where a < 3;
insert into t2 select * from t2;
explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY X ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 PRIMARY Y ALL NULL NULL NULL NULL 6 Using where; Using join buffer (incremental, BNL join)
1 PRIMARY Z ALL NULL NULL NULL NULL 6 Using where; FirstMatch(t1); Using join buffer (incremental, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
1 PRIMARY X hash_ALL NULL #hash#$hj 5 test.t1.a 6 Using where; Start temporary; Using join buffer (flat, BNLH join)
1 PRIMARY Y hash_ALL NULL #hash#$hj 5 test.t1.b 6 Using where; Using join buffer (incremental, BNLH join)
1 PRIMARY Z hash_ALL NULL #hash#$hj 5 test.t1.c 6 Using where; End temporary; Using join buffer (incremental, BNLH join)
drop table t0,t1,t2;
set @@optimizer_switch=@save_optimizer_switch;

16
mysql-test/main/subselect_mat.result
View File

@ -1477,8 +1477,8 @@ set @@optimizer_switch=@optimizer_switch_local_default;
SET @@optimizer_switch='semijoin=on,materialization=on';
EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 7 func,func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
COUNT(*)
@ -2404,8 +2404,8 @@ INSERT INTO t2 VALUES (11,11),(12,12),(13,13);
explain
SELECT 1 FROM t1 where t1.id IN (SELECT t2.i1 FROM t2 WHERE t2.i1 = t2.i2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 hash_ALL NULL #hash#$hj 4 test.t2.i1 9 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 9
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
SELECT 1 FROM t1 where t1.id IN (SELECT t2.i1 FROM t2 WHERE t2.i1 = t2.i2);
1
@ -2417,8 +2417,8 @@ alter table t1 add key(id);
explain
SELECT 1 FROM t1 where t1.id IN (SELECT t2.i1 FROM t2 WHERE t2.i1 = t2.i2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ref id id 4 test.t2.i1 2 Using index
1 PRIMARY t1 index id id 4 NULL 9 Using index
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
SELECT 1 FROM t1 where t1.id IN (SELECT t2.i1 FROM t2 WHERE t2.i1 = t2.i2);
1
@ -2474,8 +2474,8 @@ INSERT INTO t2 VALUES (11,11),(12,12),(13,13);
CREATE VIEW v1 AS SELECT t2.i1 FROM t2 where t2.i1 = t2.i2;
explain SELECT 1 FROM t1 where t1.id IN (SELECT v1.i1 from v1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ref id id 4 test.t2.i1 2 Using index
1 PRIMARY t1 index id id 4 NULL 9 Using index
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
SELECT 1 FROM t1 where t1.id IN (SELECT v1.i1 from v1);
1

10
mysql-test/main/subselect_no_mat.result
View File

@ -5668,9 +5668,9 @@ WHERE (ot1.a,ot4.a) IN (SELECT it2.a,it3.a
FROM it2,it3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY ot1 ALL NULL NULL NULL NULL 2
1 PRIMARY ot4 ALL NULL NULL NULL NULL 8 Using join buffer (flat, BNL join)
1 PRIMARY it2 ALL NULL NULL NULL NULL 4 Using where
1 PRIMARY it3 ALL NULL NULL NULL NULL 6 Using where; FirstMatch(ot4)
1 PRIMARY it2 ALL NULL NULL NULL NULL 4 Using where; Start temporary; Using join buffer (flat, BNL join)
1 PRIMARY it3 ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join)
1 PRIMARY ot4 ALL NULL NULL NULL NULL 8 Using where; End temporary; Using join buffer (flat, BNL join)
DROP TABLE IF EXISTS ot1, ot4, it2, it3;
#
# Bug#729039: NULL keys used to evaluate subquery
@ -5697,8 +5697,8 @@ EXPLAIN
SELECT * FROM t1
WHERE EXISTS (SELECT a FROM t2 WHERE t2.a = t1.a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 index idx idx 5 NULL 3 Using index; LooseScan
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
1 PRIMARY t2 ref idx idx 5 test.t1.a 2 Using index; FirstMatch(t1)
DROP TABLE t1,t2;
#
# BUG#752992: Wrong results for a subquery with 'semijoin=on'

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

@ -5694,8 +5694,8 @@ EXPLAIN
SELECT * FROM t1
WHERE EXISTS (SELECT a FROM t2 USE INDEX() WHERE t2.a = t1.a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3
SELECT * FROM t1
WHERE EXISTS (SELECT a FROM t2 WHERE t2.a = t1.a);
@ -5705,8 +5705,8 @@ EXPLAIN
SELECT * FROM t1
WHERE EXISTS (SELECT a FROM t2 WHERE t2.a = t1.a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 index idx idx 5 NULL 3 Using index
DROP TABLE t1,t2;
#

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

@ -729,8 +729,8 @@ SELECT int_key FROM ot1
WHERE int_nokey IN (SELECT it2.int_key
FROM it1 LEFT JOIN it2 ON it2.datetime_key);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 11
1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
1 PRIMARY ot1 ALL NULL NULL NULL NULL 20
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED it1 index NULL int_key 4 NULL 2 Using index
2 MATERIALIZED it2 ALL int_key,datetime_key NULL NULL NULL 20 Using where
DROP TABLE ot1, it1, it2;
@ -972,11 +972,11 @@ SELECT `varchar_key` , `varchar_nokey`
FROM t1
WHERE `varchar_nokey` < 'n' XOR `pk` ) ;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 15 100.00
1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1 100.00
2 MATERIALIZED t1 ALL varchar_key NULL NULL NULL 15 100.00 Using where
Warnings:
Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where `test`.`t1`.`varchar_nokey` = `test`.`t1`.`varchar_key` and `test`.`t2`.`varchar_nokey` = `test`.`t1`.`varchar_key` and (`test`.`t1`.`varchar_key` < 'n' xor `test`.`t1`.`pk`)
Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where `test`.`t1`.`varchar_nokey` = `test`.`t1`.`varchar_key` and (`test`.`t1`.`varchar_key` < 'n' xor `test`.`t1`.`pk`)
SELECT varchar_nokey
FROM t2
WHERE ( `varchar_nokey` , `varchar_nokey` ) IN (
@ -1246,8 +1246,8 @@ INSERT INTO t2 VALUES (1, 0), (1, 1), (2, 0), (2, 1);
EXPLAIN
SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 index k k 10 NULL 4 Using where; Using index; LooseScan
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
1 PRIMARY t2 index k k 10 NULL 4 Using where; Using index; Start temporary; End temporary
SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
i
1
@ -1757,8 +1757,8 @@ insert into t3 values('three'),( 'four');
insert into t3 values('three'),( 'four');
explain select * from t3 where t3.b in (select t2.b from t1 left join t2 on t1.a=t2.a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2
1 PRIMARY t3 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t3 ALL NULL NULL NULL NULL 8
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func 1
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 2
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 Using where
select * from t3 where t3.b in (select t2.b from t1 left join t2 on t1.a=t2.a);
@ -1991,12 +1991,13 @@ CREATE VIEW v4 AS SELECT DISTINCT f2 FROM t4 ;
explain extended
SELECT * FROM t1 NATURAL LEFT JOIN (t2, t3) WHERE t2.f3 IN (SELECT * FROM t4);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY t4 ref f2 f2 5 test.t2.f3 2 100.00 Using index; FirstMatch(t2)
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t3 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t4 index f2 f2 5 NULL 2 100.00 Using index
Warnings:
Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2`,`test`.`t2`.`f3` AS `f3`,`test`.`t3`.`f3` AS `f3` from `test`.`t1` semi join (`test`.`t4`) join `test`.`t2` join `test`.`t3` where `test`.`t4`.`f2` = `test`.`t2`.`f3` and `test`.`t3`.`f1` = `test`.`t1`.`f1` and `test`.`t1`.`f2` = `test`.`t2`.`f2`
Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2`,`test`.`t2`.`f3` AS `f3`,`test`.`t3`.`f3` AS `f3` from `test`.`t1` semi join (`test`.`t4`) join `test`.`t2` join `test`.`t3` where `test`.`t3`.`f1` = `test`.`t1`.`f1` and `test`.`t1`.`f2` = `test`.`t2`.`f2`
SELECT * FROM t1 NATURAL LEFT JOIN (t2, t3) WHERE t2.f3 IN (SELECT * FROM t4);
f1 f2 f3 f3
2 0 0 0
@ -2495,8 +2496,8 @@ WHERE t1.a = t2.a AND t2.a IN (SELECT b FROM t3 STRAIGHT_JOIN t4);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t3 system NULL NULL NULL NULL 1
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 1
1 PRIMARY t1 ref a a 5 const 1 Using index
1 PRIMARY t2 ref a a 5 func 1 Using index
1 PRIMARY t2 ref a a 5 const 1 Using index
1 PRIMARY t1 ref a a 5 func 1 Using index
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 0
SELECT * FROM t1, t2
WHERE t1.a = t2.a AND t2.a IN (SELECT b FROM t3 STRAIGHT_JOIN t4);
@ -2701,8 +2702,8 @@ a
19
explain select * from t3 where a in (select kp1 from t1 where kp1<20);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using where; Using index; LooseScan
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where
1 PRIMARY t1 ref kp1 kp1 5 test.t3.a 1 Using index; FirstMatch(t3)
drop table t0,t1,t3;
set optimizer_switch= @tmp_923246;
#
@ -2918,8 +2919,8 @@ WHERE alias1.pk = 58 OR alias1.col_varchar_key = 'o'
);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2
1 PRIMARY alias1 index_merge PRIMARY,col_int_key,col_varchar_key PRIMARY,col_varchar_key 4,4 NULL 2 Using sort_union(PRIMARY,col_varchar_key); Using where
1 PRIMARY alias2 ALL col_int_key NULL NULL NULL 12 Range checked for each record (index map: 0x2); FirstMatch(t2)
1 PRIMARY alias1 index_merge PRIMARY,col_int_key,col_varchar_key PRIMARY,col_varchar_key 4,4 NULL 2 Using sort_union(PRIMARY,col_varchar_key); Using where; Start temporary
1 PRIMARY alias2 ALL col_int_key NULL NULL NULL 12 Range checked for each record (index map: 0x2); End temporary
SELECT *
FROM t2
WHERE (field1) IN (SELECT alias1.col_varchar_nokey AS field1
@ -3255,4 +3256,27 @@ create table t2 (a2 varchar(25)) ;
insert into t1 select 'xxx' from dual where 'xxx' in (select a2 from t2);
drop table t1,t2;
# End of 5.5 test
#
# MDEV-20109: Optimizer ignores distinct key created for materialized
# semi-join subquery when searching for best execution plan
#
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2(a int);
insert into t2 select A.a + B.a* 10 + C.a * 100 from t1 A, t1 B, t1 C;
create table t3 (a int);
create table t4 (a int);
insert into t3 select A.a +1000*B.a from t2 A, t1 B;
insert into t4 select floor(rand()*1000) from t2 limit 500;
# The following must not use this query plan that does a cross join:
# | 1 | PRIMARY | <subquery2> | ALL | distinct_key | ... | 500 | |
# | 1 | PRIMARY | t3 | ALL | NULL | ... | 10000 | Using where; Using join buffer (flat, BNL join) |
#
# Instead, it should use eq_ref on the materialized table.
explain select * from t3 where a in (select a from t4 group by a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t3 ALL NULL NULL NULL NULL 10000
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 500
drop table t1, t2, t3, t4;
set optimizer_switch=@subselect_sj_tmp;

25
mysql-test/main/subselect_sj.test
View File

@ -2938,5 +2938,30 @@ drop table t1,t2;
--echo # End of 5.5 test
--echo #
--echo # MDEV-20109: Optimizer ignores distinct key created for materialized
--echo # semi-join subquery when searching for best execution plan
--echo #
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2(a int);
insert into t2 select A.a + B.a* 10 + C.a * 100 from t1 A, t1 B, t1 C;
create table t3 (a int);
create table t4 (a int);
insert into t3 select A.a +1000*B.a from t2 A, t1 B;
insert into t4 select floor(rand()*1000) from t2 limit 500;
--echo # The following must not use this query plan that does a cross join:
--echo # | 1 | PRIMARY | <subquery2> | ALL | distinct_key | ... | 500 | |
--echo # | 1 | PRIMARY | t3 | ALL | NULL | ... | 10000 | Using where; Using join buffer (flat, BNL join) |
--echo #
--echo # Instead, it should use eq_ref on the materialized table.
explain select * from t3 where a in (select a from t4 group by a);
drop table t1, t2, t3, t4;
# The following command must be the last one the file
set optimizer_switch=@subselect_sj_tmp;

18
mysql-test/main/subselect_sj2.result
View File

@ -118,8 +118,9 @@ set join_buffer_size= @save_join_buffer_size;
set max_heap_table_size= @save_max_heap_table_size;
explain select * from t1 where a in (select b from t2);
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 t2 ref b b 5 test.t1.a 2 Using index; FirstMatch(t1)
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 index b b 5 NULL 20 Using index
select * from t1;
a b
1 1
@ -146,8 +147,8 @@ explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 22
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer (flat, BNL join)
1 PRIMARY ot ALL NULL NULL NULL NULL 32
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED it ALL NULL NULL NULL NULL 22
select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
@ -214,8 +215,8 @@ explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 22
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer (flat, BNL join)
1 PRIMARY ot ALL NULL NULL NULL NULL 52
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED it ALL NULL NULL NULL NULL 22
select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
@ -745,9 +746,10 @@ c2 in (select 1 from t3, t2) and
c1 in (select convert(c6,char(1)) from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t2)
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 1
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch(t2)
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch((sj-nest))
3 MATERIALIZED t2 ALL NULL NULL NULL NULL 1
drop table t2, t3;
#
# BUG#761598: InnoDB: Error: row_search_for_mysql() is called without ha_innobase::external_lock() in maria-5.3

22
mysql-test/main/subselect_sj2_jcl6.result
View File

@ -158,9 +158,9 @@ explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 22
1 PRIMARY ot hash_ALL NULL #hash#$hj 5 test.it.a 32 Using where; Using join buffer (flat, BNLH join)
2 MATERIALIZED it ALL NULL NULL NULL NULL 22 Using where
1 PRIMARY ot ALL NULL NULL NULL NULL 32
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED it ALL NULL NULL NULL NULL 22
select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
@ -226,9 +226,9 @@ explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 22
1 PRIMARY ot hash_ALL NULL #hash#$hj 5 test.it.a 52 Using where; Using join buffer (flat, BNLH join)
2 MATERIALIZED it ALL NULL NULL NULL NULL 22 Using where
1 PRIMARY ot ALL NULL NULL NULL NULL 52
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED it ALL NULL NULL NULL NULL 22
select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
@ -1367,9 +1367,10 @@ SELECT t3.* FROM t1 JOIN t3 ON t3.b = t1.b
WHERE c IN (SELECT t4.b FROM t4 JOIN t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t3 ALL NULL NULL NULL NULL 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join)
1 PRIMARY t4 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t3); Using join buffer (incremental, BNL join)
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
1 PRIMARY t1 ref b b 4 test.t3.b 1 Using index
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 1
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
SELECT t3.* FROM t1 JOIN t3 ON t3.b = t1.b
WHERE c IN (SELECT t4.b FROM t4 JOIN t2);
b c
@ -1395,9 +1396,10 @@ EXPLAIN
SELECT * FROM t1, t2 WHERE b IN (SELECT a FROM t3, t4 WHERE b = pk);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 1
1 PRIMARY t4 ALL NULL NULL NULL NULL 1 Using where
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t4.b 1 Using where; FirstMatch(t2)
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 1 Using where
2 MATERIALIZED t3 eq_ref PRIMARY PRIMARY 4 test.t4.b 1
SELECT * FROM t1, t2 WHERE b IN (SELECT a FROM t3, t4 WHERE b = pk);
pk a b
1 6 8

48
mysql-test/main/subselect_sj2_mat.result
View File

@ -120,8 +120,9 @@ set join_buffer_size= @save_join_buffer_size;
set max_heap_table_size= @save_max_heap_table_size;
explain select * from t1 where a in (select b from t2);
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 t2 ref b b 5 test.t1.a 2 Using index; FirstMatch(t1)
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 index b b 5 NULL 20 Using index
select * from t1;
a b
1 1
@ -148,8 +149,8 @@ explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 22
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer (flat, BNL join)
1 PRIMARY ot ALL NULL NULL NULL NULL 32
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED it ALL NULL NULL NULL NULL 22
select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
@ -216,8 +217,8 @@ explain select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 22
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer (flat, BNL join)
1 PRIMARY ot ALL NULL NULL NULL NULL 52
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED it ALL NULL NULL NULL NULL 22
select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
@ -747,9 +748,10 @@ c2 in (select 1 from t3, t2) and
c1 in (select convert(c6,char(1)) from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t2)
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 1
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch(t2)
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch((sj-nest))
3 MATERIALIZED t2 ALL NULL NULL NULL NULL 1
drop table t2, t3;
#
# BUG#761598: InnoDB: Error: row_search_for_mysql() is called without ha_innobase::external_lock() in maria-5.3
@ -1596,12 +1598,12 @@ set optimizer_switch='materialization=on,semijoin=on';
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE i1 IN (SELECT i3 FROM t2, t3 WHERE i3 = i2 OR 1=2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 100.00
1 PRIMARY t1 hash_ALL NULL #hash#$hj 5 test.t2.i2 5 100.00 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 100.00 Using where
2 MATERIALIZED t3 hash_ALL NULL #hash#$hj 5 test.t2.i2 3 100.00 Using where; Using join buffer (flat, BNLH join)
Warnings:
Note 1003 select `test`.`t1`.`i1` AS `i1` from `test`.`t1` semi join (`test`.`t2` join `test`.`t3`) where `test`.`t3`.`i3` = `test`.`t2`.`i2` and `test`.`t1`.`i1` = `test`.`t2`.`i2`
Note 1003 select `test`.`t1`.`i1` AS `i1` from `test`.`t1` semi join (`test`.`t2` join `test`.`t3`) where `test`.`t3`.`i3` = `test`.`t2`.`i2`
SELECT * FROM t1 WHERE i1 IN (SELECT i3 FROM t2, t3 WHERE i3 = i2 OR 1=2);
i1
7
@ -1609,12 +1611,12 @@ EXPLAIN EXTENDED
SELECT * FROM t1
WHERE i1 IN (SELECT i3 FROM t2, t3 WHERE i3 > 0 AND i3 = i2 OR 1=2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3 100.00
1 PRIMARY t1 hash_ALL NULL #hash#$hj 5 test.t2.i2 5 100.00 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 100.00 Using where
2 MATERIALIZED t3 hash_ALL NULL #hash#$hj 5 test.t2.i2 3 100.00 Using where; Using join buffer (flat, BNLH join)
Warnings:
Note 1003 select `test`.`t1`.`i1` AS `i1` from `test`.`t1` semi join (`test`.`t2` join `test`.`t3`) where `test`.`t3`.`i3` = `test`.`t2`.`i2` and `test`.`t1`.`i1` = `test`.`t2`.`i2` and `test`.`t3`.`i3` > 0
Note 1003 select `test`.`t1`.`i1` AS `i1` from `test`.`t1` semi join (`test`.`t2` join `test`.`t3`) where `test`.`t3`.`i3` = `test`.`t2`.`i2` and `test`.`t3`.`i3` > 0
SELECT * FROM t1
WHERE i1 IN (SELECT i3 FROM t2, t3 WHERE i3 > 0 AND i3 = i2 OR 1=2);
i1
@ -1702,8 +1704,8 @@ OR
);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t index PRIMARY PRIMARY 4 NULL 13 Using where; Using index
2 MATERIALIZED <subquery3> ALL distinct_key NULL NULL NULL 8
2 MATERIALIZED A ALL PRIMARY NULL NULL NULL 13 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED A ALL PRIMARY NULL NULL NULL 13
2 MATERIALIZED <subquery3> eq_ref distinct_key distinct_key 67 func 1
3 MATERIALIZED B ALL PRIMARY NULL NULL NULL 13 Using where
SELECT SQL_NO_CACHE t.id
FROM t1 t
@ -1853,18 +1855,18 @@ AND t3.id_product IN (SELECT id_product FROM t2 t2_3 WHERE t2_3.id_t2 = 18 OR t2
AND t3.id_product IN (SELECT id_product FROM t2 t2_4 WHERE t2_4.id_t2 = 34 OR t2_4.id_t2 = 23)
AND t3.id_product IN (SELECT id_product FROM t2 t2_5 WHERE t2_5.id_t2 = 29 OR t2_5.id_t2 = 28 OR t2_5.id_t2 = 26);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 index NULL PRIMARY 8 NULL 73 Using index
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t1.id_product 1 Using index
1 PRIMARY <subquery3> ALL distinct_key NULL NULL NULL 12
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t2_2.id_product 1 Using where; Using index
1 PRIMARY <subquery5> eq_ref distinct_key distinct_key 4 func 1 Using where
1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 4 func 1 Using where
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 Using where
1 PRIMARY t4 eq_ref PRIMARY PRIMARY 8 test.t1.id_product,const 1 Using where; Using index
1 PRIMARY <subquery6> eq_ref distinct_key distinct_key 4 func 1 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 Using where
1 PRIMARY t5 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t4 eq_ref PRIMARY PRIMARY 8 test.t3.id_product,const 1 Using where; Using index
1 PRIMARY t1 index NULL PRIMARY 8 NULL 73 Using where; Using index; Using join buffer (flat, BNL join)
3 MATERIALIZED t2_2 ref id_t2,id_product id_t2 5 const 12 Using where
5 MATERIALIZED t2_4 range id_t2,id_product id_t2 5 NULL 18 Using index condition; Using where
4 MATERIALIZED t2_3 range id_t2,id_product id_t2 5 NULL 32 Using index condition; Using where
3 MATERIALIZED t2_2 ref id_t2,id_product id_t2 5 const 12
2 MATERIALIZED t2_1 ref id_t2,id_product id_t2 5 const 50
6 MATERIALIZED t2_5 range id_t2,id_product id_t2 5 NULL 30 Using index condition; Using where
2 MATERIALIZED t2_1 ref id_t2,id_product id_t2 5 const 50
drop table t1,t2,t3,t4,t5;

61
mysql-test/main/subselect_sj_jcl6.result
View File

@ -742,8 +742,8 @@ SELECT int_key FROM ot1
WHERE int_nokey IN (SELECT it2.int_key
FROM it1 LEFT JOIN it2 ON it2.datetime_key);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 11
1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
1 PRIMARY ot1 ALL NULL NULL NULL NULL 20
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED it1 index NULL int_key 4 NULL 2 Using index
2 MATERIALIZED it2 ALL int_key,datetime_key NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)
DROP TABLE ot1, it1, it2;
@ -985,11 +985,11 @@ SELECT `varchar_key` , `varchar_nokey`
FROM t1
WHERE `varchar_nokey` < 'n' XOR `pk` ) ;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 15 100.00
1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1 100.00
2 MATERIALIZED t1 ALL varchar_key NULL NULL NULL 15 100.00 Using where
Warnings:
Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where `test`.`t1`.`varchar_nokey` = `test`.`t1`.`varchar_key` and `test`.`t2`.`varchar_nokey` = `test`.`t1`.`varchar_key` and (`test`.`t1`.`varchar_key` < 'n' xor `test`.`t1`.`pk`)
Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where `test`.`t1`.`varchar_nokey` = `test`.`t1`.`varchar_key` and (`test`.`t1`.`varchar_key` < 'n' xor `test`.`t1`.`pk`)
SELECT varchar_nokey
FROM t2
WHERE ( `varchar_nokey` , `varchar_nokey` ) IN (
@ -1259,8 +1259,8 @@ INSERT INTO t2 VALUES (1, 0), (1, 1), (2, 0), (2, 1);
EXPLAIN
SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 index k k 10 NULL 4 Using where; Using index; LooseScan
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
1 PRIMARY t2 index k k 10 NULL 4 Using where; Using index; Start temporary; End temporary; Using join buffer (flat, BNL join)
SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
i
1
@ -1770,8 +1770,8 @@ insert into t3 values('three'),( 'four');
insert into t3 values('three'),( 'four');
explain select * from t3 where t3.b in (select t2.b from t1 left join t2 on t1.a=t2.a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2
1 PRIMARY t3 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t3 ALL NULL NULL NULL NULL 8
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func 1
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 2
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
select * from t3 where t3.b in (select t2.b from t1 left join t2 on t1.a=t2.a);
@ -2509,8 +2509,8 @@ WHERE t1.a = t2.a AND t2.a IN (SELECT b FROM t3 STRAIGHT_JOIN t4);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t3 system NULL NULL NULL NULL 1
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 1
1 PRIMARY t1 ref a a 5 const 1 Using index
1 PRIMARY t2 ref a a 5 func 1 Using index
1 PRIMARY t2 ref a a 5 const 1 Using index
1 PRIMARY t1 ref a a 5 func 1 Using index
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 0
SELECT * FROM t1, t2
WHERE t1.a = t2.a AND t2.a IN (SELECT b FROM t3 STRAIGHT_JOIN t4);
@ -2715,8 +2715,8 @@ a
19
explain select * from t3 where a in (select kp1 from t1 where kp1<20);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using where; Using index; LooseScan
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where
1 PRIMARY t1 ref kp1 kp1 5 test.t3.a 1 Using index; FirstMatch(t3)
drop table t0,t1,t3;
set optimizer_switch= @tmp_923246;
#
@ -2932,8 +2932,8 @@ WHERE alias1.pk = 58 OR alias1.col_varchar_key = 'o'
);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2
1 PRIMARY alias1 index_merge PRIMARY,col_int_key,col_varchar_key PRIMARY,col_varchar_key 4,4 NULL 2 Using sort_union(PRIMARY,col_varchar_key); Using where
1 PRIMARY alias2 ALL col_int_key NULL NULL NULL 12 Range checked for each record (index map: 0x2); FirstMatch(t2)
1 PRIMARY alias1 index_merge PRIMARY,col_int_key,col_varchar_key PRIMARY,col_varchar_key 4,4 NULL 2 Using sort_union(PRIMARY,col_varchar_key); Using where; Start temporary; Using join buffer (flat, BNL join)
1 PRIMARY alias2 ALL col_int_key NULL NULL NULL 12 Range checked for each record (index map: 0x2); End temporary
SELECT *
FROM t2
WHERE (field1) IN (SELECT alias1.col_varchar_nokey AS field1
@ -3269,6 +3269,29 @@ create table t2 (a2 varchar(25)) ;
insert into t1 select 'xxx' from dual where 'xxx' in (select a2 from t2);
drop table t1,t2;
# End of 5.5 test
#
# MDEV-20109: Optimizer ignores distinct key created for materialized
# semi-join subquery when searching for best execution plan
#
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2(a int);
insert into t2 select A.a + B.a* 10 + C.a * 100 from t1 A, t1 B, t1 C;
create table t3 (a int);
create table t4 (a int);
insert into t3 select A.a +1000*B.a from t2 A, t1 B;
insert into t4 select floor(rand()*1000) from t2 limit 500;
# The following must not use this query plan that does a cross join:
# | 1 | PRIMARY | <subquery2> | ALL | distinct_key | ... | 500 | |
# | 1 | PRIMARY | t3 | ALL | NULL | ... | 10000 | Using where; Using join buffer (flat, BNL join) |
#
# Instead, it should use eq_ref on the materialized table.
explain select * from t3 where a in (select a from t4 group by a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t3 ALL NULL NULL NULL NULL 10000
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 500
drop table t1, t2, t3, t4;
set optimizer_switch=@subselect_sj_tmp;
#
# BUG#49129: Wrong result with IN-subquery with join_cache_level=6 and firstmatch=off
@ -3476,8 +3499,8 @@ EXPLAIN
SELECT a FROM t1 t WHERE a IN (SELECT b FROM t1, t2 WHERE b = a)
GROUP BY a HAVING a != 'z';
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t index idx_a idx_a 4 NULL 3 Using index
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2 Using temporary; Using filesort
1 PRIMARY t ref idx_a idx_a 4 test.t2.b 2 Using index
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 Using where
2 MATERIALIZED t1 ref idx_a idx_a 4 test.t2.b 2 Using index
SELECT a FROM t1 t WHERE a IN (SELECT b FROM t1, t2 WHERE b = a)
@ -3490,8 +3513,8 @@ EXPLAIN
SELECT a FROM t1 t WHERE a IN (SELECT b FROM t1, t2 WHERE b = a)
GROUP BY a HAVING a != 'z';
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t index idx_a idx_a 4 NULL 3 Using index
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2 Using temporary; Using filesort
1 PRIMARY t ref idx_a idx_a 4 test.t2.b 2 Using index
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 Using where
2 MATERIALIZED t1 ref idx_a idx_a 4 test.t2.b 2 Using index
SELECT a FROM t1 t WHERE a IN (SELECT b FROM t1, t2 WHERE b = a)

22
mysql-test/main/subselect_sj_mat.result
View File

@ -1100,11 +1100,11 @@ insert into t3 values (30);
explain extended
select a from t1 where a in (select c from t2 where d >= 20);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 6 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00
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 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t1`.`a` = `test`.`t2`.`c` and `test`.`t2`.`d` >= 20
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`d` >= 20
select a from t1 where a in (select c from t2 where d >= 20);
a
2
@ -1514,8 +1514,8 @@ set @@optimizer_switch=@optimizer_switch_local_default;
SET @@optimizer_switch='semijoin=on,materialization=on';
EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 7 func,func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2
SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
COUNT(*)
@ -2444,8 +2444,8 @@ INSERT INTO t2 VALUES (11,11),(12,12),(13,13);
explain
SELECT 1 FROM t1 where t1.id IN (SELECT t2.i1 FROM t2 WHERE t2.i1 = t2.i2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 hash_ALL NULL #hash#$hj 4 test.t2.i1 9 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 9
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
SELECT 1 FROM t1 where t1.id IN (SELECT t2.i1 FROM t2 WHERE t2.i1 = t2.i2);
1
@ -2457,8 +2457,8 @@ alter table t1 add key(id);
explain
SELECT 1 FROM t1 where t1.id IN (SELECT t2.i1 FROM t2 WHERE t2.i1 = t2.i2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ref id id 4 test.t2.i1 2 Using index
1 PRIMARY t1 index id id 4 NULL 9 Using index
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
SELECT 1 FROM t1 where t1.id IN (SELECT t2.i1 FROM t2 WHERE t2.i1 = t2.i2);
1
@ -2514,8 +2514,8 @@ INSERT INTO t2 VALUES (11,11),(12,12),(13,13);
CREATE VIEW v1 AS SELECT t2.i1 FROM t2 where t2.i1 = t2.i2;
explain SELECT 1 FROM t1 where t1.id IN (SELECT v1.i1 from v1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ref id id 4 test.t2.i1 2 Using index
1 PRIMARY t1 index id id 4 NULL 9 Using index
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 Using where
SELECT 1 FROM t1 where t1.id IN (SELECT v1.i1 from v1);
1

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

@ -743,21 +743,21 @@ 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 <subquery3> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1)) `tvc_0`) where `test`.`t1`.`a` = `tvc_0`.`1`
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1)) `tvc_0`) where 1
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 <subquery2> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 `test`.`t1`.`a` = `tvc_0`.`1`
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
# IN-subquery with VALUES structure(s) : UNION with VALUES on the first place
select * from t1
where a in (values (1) union select 2);
@ -978,21 +978,21 @@ 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 <subquery3> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 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` = `tvc_0`.`1`
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1
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 <subquery2> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 `test`.`t1`.`a` = `tvc_0`.`1`
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
# ANY-subquery with VALUES structure(s) : UNION with VALUES on the first place
select * from t1
where a = any (values (1) union select 2);

24
mysql-test/suite/compat/oracle/r/table_value_constr.result
View File

@ -741,21 +741,21 @@ 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 <subquery3> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" semi join ((values (1)) "tvc_0") where "test"."t1"."a" = "tvc_0"."1"
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" semi join ((values (1)) "tvc_0") where 1
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 <subquery2> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 "test"."t1"."a" = "tvc_0"."1"
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
# IN-subquery with VALUES structure(s) : UNION with VALUES on the first place
select * from t1
where a in (values (1) union select 2);
@ -976,21 +976,21 @@ 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 <subquery3> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 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" = "tvc_0"."1"
Note 1003 select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" semi join ((values (1),(2)) "tvc_0") where 1
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 <subquery2> ALL distinct_key NULL NULL NULL 2 100.00
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using join buffer (flat, BNL join)
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
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 "test"."t1"."a" = "tvc_0"."1"
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
# ANY-subquery with VALUES structure(s) : UNION with VALUES on the first place
select * from t1
where a = any (values (1) union select 2);

8
mysql-test/suite/gcol/r/gcol_select_innodb.result
View File

@ -691,8 +691,8 @@ WHERE t4.c1 < 'o'
)
AND t1.i1 <= t3.i2_key;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using join buffer (flat, BNL join)
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t4.i1 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using join buffer (flat, BNL join)
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 3 Using where
@ -746,8 +746,8 @@ WHERE t4.c1 < 'o'
)
AND t1.i1 <= t3.i2_key;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using join buffer (flat, BNL join)
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t4.i1 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using join buffer (flat, BNL join)
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 3 Using where
@ -802,8 +802,8 @@ WHERE t4.c1 < 'o'
)
AND t1.i1 <= t3.i2_key;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using join buffer (flat, BNL join)
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t4.i1 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using join buffer (flat, BNL join)
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 3 Using where
@ -866,8 +866,8 @@ WHERE t4.c1 < 'o'
)
AND t1.i1 <= t3.i2_key;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using join buffer (flat, BNL join)
1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t4.i1 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using join buffer (flat, BNL join)
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 3 Using where

8
mysql-test/suite/gcol/r/gcol_select_myisam.result
View File

@ -1313,8 +1313,8 @@ WHERE t4.c1 < 'o'
)
AND t1.i1 <= t3.i2_key;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using join buffer (flat, BNL join)
1 PRIMARY t3 eq_ref PRIMARY,v_idx PRIMARY 4 test.t4.i1 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using join buffer (flat, BNL join)
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 3 Using where
@ -1369,8 +1369,8 @@ WHERE t4.c1 < 'o'
)
AND t1.i1 <= t3.i2_key;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using join buffer (flat, BNL join)
1 PRIMARY t3 eq_ref PRIMARY,v_idx,v_idx2 PRIMARY 4 test.t4.i1 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using join buffer (flat, BNL join)
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 3 Using where
@ -1427,8 +1427,8 @@ WHERE t4.c1 < 'o'
)
AND t1.i1 <= t3.i2_key;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using join buffer (flat, BNL join)
1 PRIMARY t3 eq_ref PRIMARY,v_idx2 PRIMARY 4 test.t4.i1 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using join buffer (flat, BNL join)
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 3 Using where
@ -1494,8 +1494,8 @@ WHERE t4.c1 < 'o'
)
AND t1.i1 <= t3.i2_key;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using join buffer (flat, BNL join)
1 PRIMARY t3 eq_ref PRIMARY,v_idx PRIMARY 4 test.t4.i1 1 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using join buffer (flat, BNL join)
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 3 Using where

6
mysql-test/suite/versioning/r/cte.result
View File

@ -137,15 +137,15 @@ where e.mgr = a.emp_id
)
select name from emp where emp_id in (select emp_id from ancestors for system_time as of timestamp @ts_1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery4> ALL distinct_key NULL NULL NULL 4 100.00
1 PRIMARY emp ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY emp ALL PRIMARY NULL NULL NULL 4 75.00 Using where
1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 4 func 1 100.00
4 MATERIALIZED <derived2> ALL NULL NULL NULL NULL 4 100.00
2 DERIVED e ALL NULL NULL NULL NULL 4 100.00 Using where
3 RECURSIVE UNION e ALL mgr-fk NULL NULL NULL 4 100.00 Using where
3 RECURSIVE UNION <derived2> ref key0 key0 5 test.e.mgr 2 100.00
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
Warnings:
Note 1003 with recursive ancestors as (/* select#2 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME ALL `e` where `test`.`e`.`name` = 'bill' and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1` union /* select#3 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME ALL `e` join `ancestors` `a` where `a`.`emp_id` = `test`.`e`.`mgr` and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1`)/* select#1 */ select `test`.`emp`.`name` AS `name` from `test`.`emp` FOR SYSTEM_TIME ALL semi join (`ancestors`) where `test`.`emp`.`emp_id` = `ancestors`.`emp_id` and `test`.`emp`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999'
Note 1003 with recursive ancestors as (/* select#2 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME ALL `e` where `test`.`e`.`name` = 'bill' and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1` union /* select#3 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME ALL `e` join `ancestors` `a` where `a`.`emp_id` = `test`.`e`.`mgr` and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1`)/* select#1 */ select `test`.`emp`.`name` AS `name` from `test`.`emp` FOR SYSTEM_TIME ALL semi join (`ancestors`) where `test`.`emp`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999'
with recursive
ancestors
as

7
sql/opt_subselect.cc
View File

@ -2387,7 +2387,7 @@ bool optimize_semijoin_nests(JOIN *join, table_map all_table_map)
&subjoin_out_rows);
sjm->materialization_cost.convert_from_cost(subjoin_read_time);
sjm->rows= subjoin_out_rows;
sjm->rows_with_duplicates= sjm->rows= subjoin_out_rows;
// Don't use the following list because it has "stale" items. use
// ref_pointer_array instead:
@ -3011,11 +3011,14 @@ bool Sj_materialization_picker::check_qep(JOIN *join,
disable_jbuf, prefix_rec_count, &curpos, &dummy);
prefix_rec_count= COST_MULT(prefix_rec_count, curpos.records_read);
prefix_cost= COST_ADD(prefix_cost, curpos.read_time);
prefix_cost= COST_ADD(prefix_cost,
prefix_rec_count / (double) TIME_FOR_COMPARE);
//TODO: take into account join condition selectivity here
}
*strategy= SJ_OPT_MATERIALIZE_SCAN;
*read_time= prefix_cost;
*record_count= prefix_rec_count;
*record_count= prefix_rec_count / mat_info->rows_with_duplicates;
*handled_fanout= mat_nest->sj_inner_tables;
return TRUE;
}

5
sql/sql_class.h
View File

@ -5870,7 +5870,10 @@ public:
uint tables; /* Number of tables in the sj-nest */
/* Expected #rows in the materialized table */
/* Number of rows in the materialized table, before the de-duplication */
double rows_with_duplicates;
/* Expected #rows in the materialized table, after de-duplication */
double rows;
/*

15
sql/sql_select.cc
View File

@ -8244,6 +8244,7 @@ void JOIN::get_prefix_cost_and_fanout(uint n_tables,
record_count= COST_MULT(record_count, best_positions[i].records_read);
read_time= COST_ADD(read_time, best_positions[i].read_time);
}
/* TODO: Take into account condition selectivities here */
}
*read_time_arg= read_time;// + record_count / TIME_FOR_COMPARE;
*record_count_arg= record_count;
@ -15975,10 +15976,20 @@ void optimize_wo_join_buffering(JOIN *join, uint first_tab, uint last_tab,
reopt_remaining_tables &= ~rs->table->map;
rec_count= COST_MULT(rec_count, pos.records_read);
cost= COST_ADD(cost, pos.read_time);
cost= COST_ADD(cost, rec_count / (double) TIME_FOR_COMPARE);
//TODO: take into account join condition selectivity here
double pushdown_cond_selectivity= 1.0;
table_map real_table_bit= rs->table->map;
if (join->thd->variables.optimizer_use_condition_selectivity > 1)
{
pushdown_cond_selectivity= table_cond_selectivity(join, i, rs,
reopt_remaining_tables &
~real_table_bit);
}
(*outer_rec_count) *= pushdown_cond_selectivity;
if (!rs->emb_sj_nest)
*outer_rec_count= COST_MULT(*outer_rec_count, pos.records_read);
}
join->cur_sj_inner_tables= save_cur_sj_inner_tables;