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Back-ported the fix and the test case for bug #50257 from mariadb-5.3 code line.

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Adjusted results for a few test cases.
This commit is contained in:
Igor Babaev 2012-01-13 19:00:50 -08:00
parent 6dfe0956d6
commit 4de7978a3f
7 changed files with 40 additions and 16 deletions
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2
mysql-test/r/index_merge_myisam.result
View file

@ -1486,7 +1486,7 @@ EXPLAIN SELECT t1.f1 FROM t1
WHERE (SELECT COUNT(*) FROM t2 WHERE t2.f3 = 'h' AND t2.f2 = t1.f1) = 0 AND t1.f1 = 2;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 system PRIMARY NULL NULL NULL 1
2 DEPENDENT SUBQUERY t2 ref f2,f3 f2 5 1 Using where
2 DEPENDENT SUBQUERY t2 ref f2,f3 f2 5 const 1 Using where
DROP TABLE t1,t2;
#
# Generic @@optimizer_switch tests (move those into a separate file if

20
mysql-test/r/subselect.result
View file

@ -363,9 +363,9 @@ INSERT INTO t8 (pseudo,email) VALUES ('2joce1','2test1');
EXPLAIN EXTENDED SELECT pseudo,(SELECT email FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce')) FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t8 const PRIMARY PRIMARY 37 const 1 100.00 Using index
4 SUBQUERY t8 const PRIMARY PRIMARY 37 1 100.00 Using index
4 SUBQUERY t8 const PRIMARY PRIMARY 37 const 1 100.00 Using index
2 SUBQUERY t8 const PRIMARY PRIMARY 37 const 1 100.00
3 SUBQUERY t8 const PRIMARY PRIMARY 37 1 100.00 Using index
3 SUBQUERY t8 const PRIMARY PRIMARY 37 const 1 100.00 Using index
Warnings:
Note 1003 select 'joce' AS `pseudo`,(select 'test' from `test`.`t8` where 1) AS `(SELECT email FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce'))` from `test`.`t8` where 1
SELECT pseudo FROM t8 WHERE pseudo=(SELECT pseudo,email FROM
@ -4780,7 +4780,6 @@ EXPLAIN EXTENDED SELECT DISTINCT 1 FROM t1,
WHERE t1.a = d1.a;
ERROR 42S22: Unknown column 'd1.a' in 'where clause'
DROP TABLE t1;
End of 5.1 tests.
Set up test tables.
CREATE TABLE t1 (
t1_id INT UNSIGNED,
@ -5141,4 +5140,19 @@ pk
SET SESSION sql_mode=@old_sql_mode;
drop table t2, t1;
drop view v1;
#
# BUG#50257: Missing info in REF column of the EXPLAIN
# lines for subselects
#
CREATE TABLE t1 (a INT, b INT, INDEX (a));
INSERT INTO t1 VALUES (3, 10), (2, 20), (7, 10), (5, 20);
EXPLAIN SELECT * FROM (SELECT * FROM t1 WHERE a=7) t;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 ref a a 5 const 1 Using where
EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
2 SUBQUERY t1 ref a a 5 const 1 Using where; Using index
DROP TABLE t1;
End of 5.2 tests

6
mysql-test/suite/innodb/r/innodb_mysql.result
View file

@ -1739,7 +1739,7 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 ALL c3,c2 c3 5 5 Using where; Using filesort
2 DERIVED t1 ALL c3,c2 c3 5 const 5 Using where; Using filesort
DROP TABLE t1;
CREATE TABLE t1 (c1 REAL, c2 REAL, c3 REAL, KEY (c3), KEY (c2, c3))
ENGINE=InnoDB;
@ -1753,7 +1753,7 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 ALL c3,c2 c3 9 5 Using where; Using filesort
2 DERIVED t1 ALL c3,c2 c3 9 const 5 Using where; Using filesort
DROP TABLE t1;
CREATE TABLE t1 (c1 DECIMAL(12,2), c2 DECIMAL(12,2), c3 DECIMAL(12,2),
KEY (c3), KEY (c2, c3))
@ -1768,7 +1768,7 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 ALL c3,c2 c3 7 5 Using where; Using filesort
2 DERIVED t1 ALL c3,c2 c3 7 const 5 Using where; Using filesort
DROP TABLE t1;
End of 5.1 tests
drop table if exists t1, t2, t3;

6
mysql-test/suite/innodb_plugin/r/innodb_mysql.result
View file

@ -1739,7 +1739,7 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 ALL c3,c2 c3 5 5 Using where; Using filesort
2 DERIVED t1 ALL c3,c2 c3 5 const 5 Using where; Using filesort
DROP TABLE t1;
CREATE TABLE t1 (c1 REAL, c2 REAL, c3 REAL, KEY (c3), KEY (c2, c3))
ENGINE=InnoDB;
@ -1753,7 +1753,7 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 ALL c3,c2 c3 9 5 Using where; Using filesort
2 DERIVED t1 ALL c3,c2 c3 9 const 5 Using where; Using filesort
DROP TABLE t1;
CREATE TABLE t1 (c1 DECIMAL(12,2), c2 DECIMAL(12,2), c3 DECIMAL(12,2),
KEY (c3), KEY (c2, c3))
@ -1768,7 +1768,7 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 ALL c3,c2 c3 7 5 Using where; Using filesort
2 DERIVED t1 ALL c3,c2 c3 7 const 5 Using where; Using filesort
DROP TABLE t1;
End of 5.1 tests
drop table if exists t1, t2, t3;

4
mysql-test/suite/pbxt/r/subselect.result
View file

@ -363,9 +363,9 @@ INSERT INTO t8 (pseudo,email) VALUES ('2joce1','2test1');
EXPLAIN EXTENDED SELECT pseudo,(SELECT email FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce')) FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t8 const PRIMARY PRIMARY 37 const 1 100.00 Using index
4 SUBQUERY t8 const PRIMARY PRIMARY 37 1 100.00 Using index
4 SUBQUERY t8 const PRIMARY PRIMARY 37 const 1 100.00 Using index
2 SUBQUERY t8 const PRIMARY PRIMARY 37 const 1 100.00
3 SUBQUERY t8 const PRIMARY PRIMARY 37 1 100.00 Using index
3 SUBQUERY t8 const PRIMARY PRIMARY 37 const 1 100.00 Using index
Warnings:
Note 1003 select 'joce' AS `pseudo`,(select 'test' from `test`.`t8` where 1) AS `(SELECT email FROM t8 WHERE pseudo=(SELECT pseudo FROM t8 WHERE pseudo='joce'))` from `test`.`t8` where 1
SELECT pseudo FROM t8 WHERE pseudo=(SELECT pseudo,email FROM

15
mysql-test/t/subselect.test
View file

@ -3710,8 +3710,6 @@ WHERE t1.a = d1.a;
DROP TABLE t1;
--echo End of 5.1 tests.
#
# Bug #47904 Incorrect results w/ table subquery, derived SQs, and LEFT JOIN on index
#
@ -4011,4 +4009,17 @@ SET SESSION sql_mode=@old_sql_mode;
drop table t2, t1;
drop view v1;
--echo #
--echo # BUG#50257: Missing info in REF column of the EXPLAIN
--echo # lines for subselects
--echo #
CREATE TABLE t1 (a INT, b INT, INDEX (a));
INSERT INTO t1 VALUES (3, 10), (2, 20), (7, 10), (5, 20);
EXPLAIN SELECT * FROM (SELECT * FROM t1 WHERE a=7) t;
EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7);
DROP TABLE t1;
--echo End of 5.2 tests

3
sql/sql_select.cc
View file

@ -5913,8 +5913,7 @@ static bool create_ref_for_key(JOIN *join, JOIN_TAB *j, KEYUSE *org_keyuse,
if (keyuse->null_rejecting)
j->ref.null_rejecting |= 1 << i;
keyuse_uses_no_tables= keyuse_uses_no_tables && !keyuse->used_tables;
if (!keyuse->used_tables &&
!(join->select_options & SELECT_DESCRIBE))
if (!keyuse->used_tables &&!thd->lex->describe)
{ // Compare against constant
store_key_item tmp(thd, keyinfo->key_part[i].field,
key_buff + maybe_null,