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Merge

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This commit is contained in:
Igor Babaev
2011-02-27 00:21:45 -08:00
parent db984067eb 8f4bcdace0
commit d57b1be961
10 changed files with 442 additions and 157 deletions
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259
mysql-test/r/join_cache.result
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@ -201,7 +201,7 @@ WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
1 SIMPLE City hash NULL hj_key 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL NULL #hash#$hj 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
@ -231,8 +231,8 @@ CountryLanguage.Percentage > 50 AND
LENGTH(Language) < LENGTH(City.Name) - 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
1 SIMPLE CountryLanguage hash NULL hj_key 3 world.Country.Code 984 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash NULL hj_key 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE CountryLanguage hash_ALL NULL #hash#$hj 3 world.Country.Code 984 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL NULL #hash#$hj 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
@ -279,7 +279,7 @@ WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
1 SIMPLE City hash NULL hj_key 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL NULL #hash#$hj 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
@ -309,8 +309,8 @@ CountryLanguage.Percentage > 50 AND
LENGTH(Language) < LENGTH(City.Name) - 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
1 SIMPLE City hash NULL hj_key 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE CountryLanguage hash NULL hj_key 3 world.Country.Code 984 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE City hash_ALL NULL #hash#$hj 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE CountryLanguage hash_ALL NULL #hash#$hj 3 world.Country.Code 984 Using where; Using join buffer (incremental, BNLH join)
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
@ -347,6 +347,110 @@ Long Beach United States English
Lexington-Fayette United States English
Louisville United States English
Little Rock United States English
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND City.Population > 5000000
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
Name Population Name Population
China 1277558000 Shanghai 9696300
China 1277558000 Peking 7472000
China 1277558000 Chongqing 6351600
China 1277558000 Tianjin 5286800
Colombia 42321000 Santafé de Bogotá 6260862
Congo, The Democratic Republic of the 51654000 Kinshasa 5064000
Chile 15211000 NULL NULL
Cambodia 11168000 NULL NULL
Cameroon 15085000 NULL NULL
Canada 31147000 NULL NULL
Cuba 11201000 NULL NULL
Côte d?Ivoire 14786000 NULL NULL
Czech Republic 10278100 NULL NULL
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND
(City.Population > 5000000 OR City.Name LIKE 'Za%')
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
Name Population Name Population
China 1277558000 Shanghai 9696300
China 1277558000 Peking 7472000
China 1277558000 Chongqing 6351600
China 1277558000 Tianjin 5286800
China 1277558000 Zaozhuang 380846
China 1277558000 Zaoyang 162198
China 1277558000 Zalantun 130031
Colombia 42321000 Santafé de Bogotá 6260862
Congo, The Democratic Republic of the 51654000 Kinshasa 5064000
Chile 15211000 NULL NULL
Cambodia 11168000 NULL NULL
Cameroon 15085000 NULL NULL
Canada 31147000 NULL NULL
Cuba 11201000 NULL NULL
Côte d?Ivoire 14786000 NULL NULL
Czech Republic 10278100 NULL NULL
CREATE INDEX City_Population ON City(Population);
CREATE INDEX City_Name ON City(Name);
ANALYZE TABLE City;
Table Op Msg_type Msg_text
world.City analyze status Table is already up to date
EXPLAIN
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND City.Population > 5000000
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
1 SIMPLE City hash_range City_Population #hash#$hj:City_Population 3:4 world.Country.Code 25 Using where; Using MRR; Using join buffer (flat, BNLH join)
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND City.Population > 5000000
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
Name Population Name Population
China 1277558000 Shanghai 9696300
China 1277558000 Peking 7472000
China 1277558000 Chongqing 6351600
China 1277558000 Tianjin 5286800
Colombia 42321000 Santafé de Bogotá 6260862
Congo, The Democratic Republic of the 51654000 Kinshasa 5064000
Chile 15211000 NULL NULL
Cambodia 11168000 NULL NULL
Cameroon 15085000 NULL NULL
Canada 31147000 NULL NULL
Cuba 11201000 NULL NULL
Côte d?Ivoire 14786000 NULL NULL
Czech Republic 10278100 NULL NULL
EXPLAIN
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND
(City.Population > 5000000 OR City.Name LIKE 'Za%')
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
1 SIMPLE City hash_index_merge City_Population,City_Name #hash#$hj:City_Population,City_Name 3:4,35 world.Country.Code 96 Using sort_union(City_Population,City_Name); Using where; Using join buffer (flat, BNLH join)
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND
(City.Population > 5000000 OR City.Name LIKE 'Za%')
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
Name Population Name Population
China 1277558000 Shanghai 9696300
China 1277558000 Peking 7472000
China 1277558000 Chongqing 6351600
China 1277558000 Tianjin 5286800
China 1277558000 Zaozhuang 380846
China 1277558000 Zaoyang 162198
China 1277558000 Zalantun 130031
Colombia 42321000 Santafé de Bogotá 6260862
Congo, The Democratic Republic of the 51654000 Kinshasa 5064000
Chile 15211000 NULL NULL
Cambodia 11168000 NULL NULL
Cameroon 15085000 NULL NULL
Canada 31147000 NULL NULL
Cuba 11201000 NULL NULL
Côte d?Ivoire 14786000 NULL NULL
Czech Republic 10278100 NULL NULL
DROP INDEX City_Population ON City;
DROP INDEX City_Name ON City;
set join_cache_level=default;
set join_buffer_size=256;
show variables like 'join_buffer_size';
@ -517,7 +621,7 @@ WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
1 SIMPLE City hash NULL hj_key 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL NULL #hash#$hj 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
@ -547,8 +651,8 @@ CountryLanguage.Percentage > 50 AND
LENGTH(Language) < LENGTH(City.Name) - 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
1 SIMPLE City hash NULL hj_key 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE CountryLanguage hash NULL hj_key 3 world.Country.Code 984 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL NULL #hash#$hj 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE CountryLanguage hash_ALL NULL #hash#$hj 3 world.Country.Code 984 Using where; Using join buffer (flat, BNLH join)
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
@ -595,7 +699,7 @@ WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
1 SIMPLE City hash NULL hj_key 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL NULL #hash#$hj 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
@ -625,8 +729,8 @@ CountryLanguage.Percentage > 50 AND
LENGTH(Language) < LENGTH(City.Name) - 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
1 SIMPLE City hash NULL hj_key 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE CountryLanguage hash NULL hj_key 3 world.Country.Code 984 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE City hash_ALL NULL #hash#$hj 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE CountryLanguage hash_ALL NULL #hash#$hj 3 world.Country.Code 984 Using where; Using join buffer (incremental, BNLH join)
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
@ -712,7 +816,7 @@ WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
1 SIMPLE City hash Population,Country Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL Population,Country #hash#Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
@ -742,8 +846,8 @@ CountryLanguage.Percentage > 50 AND
LENGTH(Language) < LENGTH(City.Name) - 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
1 SIMPLE Country hash PRIMARY PRIMARY 3 world.CountryLanguage.Country 239 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash Country Country 3 world.CountryLanguage.Country 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE Country hash_ALL PRIMARY #hash#PRIMARY 3 world.CountryLanguage.Country 239 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL Country #hash#Country 3 world.CountryLanguage.Country 4079 Using where; Using join buffer (flat, BNLH join)
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
@ -786,7 +890,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
City.Population > 100000;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
1 PRIMARY City hash Population,Country Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY City hash_ALL Population,Country #hash#Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT Name FROM City
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
City.Population > 100000;
@ -814,7 +918,7 @@ WHERE
Country.Population > 10000000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
1 SIMPLE CountryLanguage hash PRIMARY PRIMARY 33 world.Country.Code,const 984 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE CountryLanguage hash_ALL PRIMARY #hash#PRIMARY 33 world.Country.Code,const 984 Using where; Using join buffer (flat, BNLH join)
SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage)
FROM Country LEFT JOIN CountryLanguage ON
(CountryLanguage.Country=Country.Code AND Language='English')
@ -912,7 +1016,7 @@ WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
1 SIMPLE City hash Population,Country Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL Population,Country #hash#Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
@ -942,8 +1046,8 @@ CountryLanguage.Percentage > 50 AND
LENGTH(Language) < LENGTH(City.Name) - 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
1 SIMPLE Country hash PRIMARY PRIMARY 3 world.CountryLanguage.Country 239 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash Country Country 3 world.CountryLanguage.Country 4079 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE Country hash_ALL PRIMARY #hash#PRIMARY 3 world.CountryLanguage.Country 239 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL Country #hash#Country 3 world.CountryLanguage.Country 4079 Using where; Using join buffer (incremental, BNLH join)
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
@ -986,7 +1090,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
City.Population > 100000;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
1 PRIMARY City hash Population,Country Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY City hash_ALL Population,Country #hash#Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT Name FROM City
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
City.Population > 100000;
@ -1014,7 +1118,7 @@ WHERE
Country.Population > 10000000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where
1 SIMPLE CountryLanguage hash PRIMARY PRIMARY 33 world.Country.Code,const 984 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE CountryLanguage hash_ALL PRIMARY #hash#PRIMARY 33 world.Country.Code,const 984 Using where; Using join buffer (flat, BNLH join)
SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage)
FROM Country LEFT JOIN CountryLanguage ON
(CountryLanguage.Country=Country.Code AND Language='English')
@ -1099,6 +1203,65 @@ Belarus NULL
Venezuela NULL
Russian Federation NULL
Vietnam NULL
EXPLAIN
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND City.Population > 5000000
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country range Name Name 52 NULL # Using index condition; Using where; Using MRR
1 SIMPLE City hash_range Population,Country #hash#Country:Population 3:4 world.Country.Code # Using where; Using MRR; Using join buffer (flat, BNLH join)
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND City.Population > 5000000
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
Name Population Name Population
China 1277558000 Shanghai 9696300
China 1277558000 Peking 7472000
China 1277558000 Chongqing 6351600
China 1277558000 Tianjin 5286800
Colombia 42321000 Santafé de Bogotá 6260862
Congo, The Democratic Republic of the 51654000 Kinshasa 5064000
Chile 15211000 NULL NULL
Cambodia 11168000 NULL NULL
Cameroon 15085000 NULL NULL
Canada 31147000 NULL NULL
Cuba 11201000 NULL NULL
Côte d?Ivoire 14786000 NULL NULL
Czech Republic 10278100 NULL NULL
CREATE INDEX City_Name ON City(Name);
EXPLAIN
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND
(City.Population > 5000000 OR City.Name LIKE 'Za%')
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country range Name Name 52 NULL 17 Using index condition; Using where; Using MRR
1 SIMPLE City hash_index_merge Population,Country,City_Name #hash#Country:Population,City_Name 3:4,35 world.Country.Code 96 Using sort_union(Population,City_Name); Using where; Using join buffer (flat, BNLH join)
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND
(City.Population > 5000000 OR City.Name LIKE 'Za%')
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
Name Population Name Population
China 1277558000 Shanghai 9696300
China 1277558000 Peking 7472000
China 1277558000 Chongqing 6351600
China 1277558000 Tianjin 5286800
China 1277558000 Zaozhuang 380846
China 1277558000 Zaoyang 162198
China 1277558000 Zalantun 130031
Colombia 42321000 Santafé de Bogotá 6260862
Congo, The Democratic Republic of the 51654000 Kinshasa 5064000
Chile 15211000 NULL NULL
Cambodia 11168000 NULL NULL
Cameroon 15085000 NULL NULL
Canada 31147000 NULL NULL
Cuba 11201000 NULL NULL
Côte d?Ivoire 14786000 NULL NULL
Czech Republic 10278100 NULL NULL
DROP INDEX City_Name ON City;
show variables like 'join_buffer_size';
Variable_name Value
join_buffer_size 131072
@ -1904,7 +2067,7 @@ WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
1 SIMPLE City hash Population,Country Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL Population,Country #hash#Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
@ -1934,8 +2097,8 @@ CountryLanguage.Percentage > 50 AND
LENGTH(Language) < LENGTH(City.Name) - 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
1 SIMPLE Country hash PRIMARY PRIMARY 3 world.CountryLanguage.Country 239 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash Country Country 3 world.CountryLanguage.Country 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE Country hash_ALL PRIMARY #hash#PRIMARY 3 world.CountryLanguage.Country 239 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL Country #hash#Country 3 world.CountryLanguage.Country 4079 Using where; Using join buffer (flat, BNLH join)
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
@ -1978,7 +2141,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
City.Population > 100000;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
1 PRIMARY City hash Population,Country Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY City hash_ALL Population,Country #hash#Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT Name FROM City
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
City.Population > 100000;
@ -2008,7 +2171,7 @@ WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
1 SIMPLE City hash Population,Country Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL Population,Country #hash#Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
@ -2038,8 +2201,8 @@ CountryLanguage.Percentage > 50 AND
LENGTH(Language) < LENGTH(City.Name) - 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where
1 SIMPLE Country hash PRIMARY PRIMARY 3 world.CountryLanguage.Country 239 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash Country Country 3 world.CountryLanguage.Country 4079 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE Country hash_ALL PRIMARY #hash#PRIMARY 3 world.CountryLanguage.Country 239 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE City hash_ALL Country #hash#Country 3 world.CountryLanguage.Country 4079 Using where; Using join buffer (incremental, BNLH join)
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
@ -2082,7 +2245,7 @@ WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AN
City.Population > 100000;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR
1 PRIMARY City hash Population,Country Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY City hash_ALL Population,Country #hash#Country 3 world.Country.Code 4079 Using where; Using join buffer (flat, BNLH join)
SELECT Name FROM City
WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND
City.Population > 100000;
@ -3105,7 +3268,7 @@ a b a c
explain select * from t1 left join t2 on t1.a=t2.a where t2.c=102 or t2.c is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 hash NULL hj_key 5 test.t1.a 3 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.a 3 Using where; Using join buffer (flat, BNLH join)
select * from t1 left join t2 on t1.a=t2.a where t2.c=102 or t2.c is null;
a b a c
3 30 3 102
@ -3959,7 +4122,7 @@ WHERE t3.u <='a' AND t2.j < 5 AND t3.v = t2.u;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 16
1 SIMPLE t2 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 hash idx idx 3 test.t2.u 20 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t3 hash_ALL idx #hash#idx 3 test.t2.u 20 Using where; Using join buffer (flat, BNLH join)
SELECT t1.i, t1.d, t1.v, t2.i, t2.d, t2.t, t2.v FROM t1,t2,t3
WHERE t3.u <='a' AND t2.j < 5 AND t3.v = t2.u;
i d v i d t v
@ -4082,8 +4245,8 @@ SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v
GROUP BY t2.v ORDER BY t1.pk,t2.v;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL idx1 NULL NULL NULL 20 Using temporary; Using filesort
1 SIMPLE t3 hash PRIMARY,idx2 PRIMARY 4 test.t2.i 20 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t1 hash idx2 idx2 3 test.t3.v 15 Using join buffer (incremental, BNLH join)
1 SIMPLE t3 hash_ALL PRIMARY,idx2 #hash#PRIMARY 4 test.t2.i 20 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t1 hash_ALL idx2 #hash#idx2 3 test.t3.v 15 Using join buffer (incremental, BNLH join)
SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v
GROUP BY t2.v ORDER BY t1.pk,t2.v;
v
@ -4134,7 +4297,7 @@ EXPLAIN
SELECT t2.i FROM t1,t2 WHERE t1.cu = t2.cl ;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 hash cu cu 33 func 10 Using where; Using index; Using join buffer (flat, BNLH join)
1 SIMPLE t1 hash_index cu #hash#cu:cu 33:33 func 10 Using where; Using join buffer (flat, BNLH join)
SELECT t2.i FROM t1,t2 WHERE t1.cu = t2.cl ;
i
6
@ -4161,7 +4324,7 @@ EXPLAIN
SELECT t1.a, t2.c FROM t1,t2 WHERE t1.a=t2.a AND t2.b=99;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 36 Using where
1 SIMPLE t2 hash idx idx 10 test.t1.a,const 15 Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL idx #hash#idx 10 test.t1.a,const 15 Using join buffer (flat, BNLH join)
SELECT t1.a, t2.c FROM t1,t2 WHERE t1.a=t2.a AND t2.b=99;
a c
SET SESSION join_cache_level = DEFAULT;
@ -4211,7 +4374,7 @@ EXPLAIN
SELECT t1.v,t2.i FROM t1,t2 WHERE t2.v = t1.v;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where
1 SIMPLE t2 hash idx idx 13 test.t1.v 18 Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL idx #hash#idx 13 test.t1.v 18 Using join buffer (flat, BNLH join)
SELECT t1.v,t2.i FROM t1,t2 WHERE t2.v = t1.v;
v i
f 4
@ -4220,7 +4383,7 @@ EXPLAIN
SELECT t1.v,t2.i FROM t1,t2 WHERE t2.v = concat(t1.v, t1.v);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7
1 SIMPLE t2 hash idx idx 13 func 18 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL idx #hash#idx 13 func 18 Using where; Using join buffer (flat, BNLH join)
SELECT t1.v,t2.i FROM t1,t2 WHERE t2.v = concat(t1.v, t1.v);
v i
f 5
@ -4273,8 +4436,8 @@ SELECT t3.i FROM t1,t2,t3
WHERE t1.v = t2.v AND t3.v = t1.v AND t2.i <> 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index idx idx 13 NULL 7 Using where; Using index
1 SIMPLE t2 hash idx idx 1003 test.t1.v 18 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t3 hash idx idx 1002 func 32 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t2 hash_ALL idx #hash#idx 1003 test.t1.v 18 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t3 hash_ALL idx #hash#idx 1002 func 32 Using where; Using join buffer (incremental, BNLH join)
SELECT t3.i FROM t1,t2,t3
WHERE t1.v = t2.v AND t3.v = t1.v AND t2.i <> 0;
i
@ -4311,7 +4474,7 @@ EXPLAIN
SELECT * FROM t1,t2 WHERE t2.a=t1.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL idx NULL NULL NULL 3 Using where
1 SIMPLE t2 hash idx idx 515 test.t1.a 12 Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL idx #hash#idx 515 test.t1.a 12 Using join buffer (flat, BNLH join)
SELECT * FROM t1,t2 WHERE t2.a=t1.a;
pk a pk a
2 aa 30 aa
@ -4494,8 +4657,8 @@ t1 LEFT JOIN
WHERE t3.a3 IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
1 SIMPLE t3 hash PRIMARY hj_key 5 test.t1.c1 1 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash NULL hj_key 5 test.t3.b3 1 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t3 hash_ALL PRIMARY #hash#$hj 5 test.t1.c1 1 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t3.b3 1 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join)
SELECT * FROM
t1 LEFT JOIN
@ -4548,7 +4711,7 @@ SELECT * FROM t1 LEFT JOIN t2 JOIN t3 ON t3.a3 = t2.a2 ON t3.b3 <> 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 hash PRIMARY PRIMARY 4 test.t2.a2 1 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t3 hash_ALL PRIMARY #hash#PRIMARY 4 test.t2.a2 1 Using where; Using join buffer (incremental, BNLH join)
SELECT * FROM t1 LEFT JOIN t2 JOIN t3 ON t3.a3 = t2.a2 ON t3.b3 <> 0;
a1 a2 b2 a3 b3
0 2 1 2 1
@ -4624,7 +4787,7 @@ EXPLAIN
SELECT * FROM t1,t2 WHERE t1.a=t2.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
1 SIMPLE t2 hash idx idx 35 test.t1.a 15 Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL idx #hash#idx 35 test.t1.a 15 Using join buffer (flat, BNLH join)
SELECT * FROM t1,t2 WHERE t1.a=t2.a;
pk a pk a
20 BBBB 1 Bbbb
@ -4739,7 +4902,7 @@ EXPLAIN
SELECT * FROM t1,t2 WHERE t1.a < 3 and t2.a IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 3 Using where; Using index
1 SIMPLE t2 hash idx idx 5 const 23 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_range idx #hash#idx:idx 5:5 const 4 Using index condition; Using MRR; Using join buffer (flat, BNLH join)
SELECT * FROM t1,t2 WHERE t1.a < 3 and t2.a IS NULL;
a a b
1 NULL 10
@ -4767,7 +4930,7 @@ EXPLAIN
SELECT * FROM t1,t2 WHERE t2.f1 = t1.f1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL f1 NULL NULL NULL 2 Using where
1 SIMPLE t2 hash f1 f1 13 test.t1.f1 12 Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL f1 #hash#f1 13 test.t1.f1 12 Using join buffer (flat, BNLH join)
SELECT * FROM t1,t2 WHERE t2.f1 = t1.f1;
f1 f2 f1 f2
SET SESSION join_cache_level = DEFAULT;
@ -4787,7 +4950,7 @@ EXPLAIN
SELECT a FROM t1,t2 WHERE t2.v = t1.v ;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t2 hash idx idx 4 test.t1.v 8 Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL idx #hash#idx 4 test.t1.v 8 Using join buffer (flat, BNLH join)
SELECT a FROM t1,t2 WHERE t2.v = t1.v ;
a
11

48
mysql-test/r/join_nested_jcl6.result
View File

@ -81,7 +81,7 @@ WHERE t3.a=1 OR t3.c IS NULL;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) where ((`test`.`t3`.`a` = 1) or isnull(`test`.`t3`.`c`))
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
@ -157,7 +157,7 @@ WHERE t3.a>1 OR t3.c IS NULL;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) where ((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`))
@ -187,7 +187,7 @@ WHERE (t3.a>1 OR t3.c IS NULL) AND
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) where (((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`)) and ((`test`.`t5`.`a` < 3) or isnull(`test`.`t5`.`c`)))
@ -237,7 +237,7 @@ ON t7.b=t8.b AND t6.b < 10;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
1 SIMPLE t8 hash NULL hj_key 5 test.t7.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t7.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
Warnings:
Note 1003 select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and (`test`.`t8`.`b` = `test`.`t7`.`b`)) and (`test`.`t7`.`b` is not null))) where 1
SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
@ -551,14 +551,14 @@ t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 hash NULL hj_key 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t1 hash_ALL NULL #hash#$hj 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join)
1 SIMPLE t7 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t8 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
Warnings:
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) where ((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)))
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
@ -646,14 +646,14 @@ t0.b=t1.b AND
(t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 hash NULL hj_key 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t1 hash_ALL NULL #hash#$hj 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t7 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t8 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings:
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
@ -845,7 +845,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) where (`test`.`t1`.`a` <= 2)
CREATE INDEX idx_b ON t2(b);
@ -913,14 +913,14 @@ t0.b=t1.b AND
(t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 hash NULL hj_key 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t1 hash_ALL NULL #hash#$hj 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t7 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t8 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings:
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
@ -963,14 +963,14 @@ t0.b=t1.b AND
(t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 hash NULL hj_key 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t1 hash_ALL NULL #hash#$hj 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t7 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t8 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings:
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
@ -1012,12 +1012,12 @@ t0.b=t1.b AND
(t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 hash NULL hj_key 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t1 hash_ALL NULL #hash#$hj 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t7 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
@ -1067,7 +1067,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t7 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t8 ref idx_b idx_b 5 test.t7.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
@ -1324,7 +1324,7 @@ c11 c21 c31
EXPLAIN SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
1 SIMPLE t2 hash NULL hj_key 5 test.t1.c11 0 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.c11 0 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (incremental, BNL join)
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (goods int(12) NOT NULL, price varchar(128) NOT NULL);

12
mysql-test/r/join_outer_jcl6.result
View File

@ -319,11 +319,11 @@ Lilliana Angelovska NULL NULL
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 hash NULL hj_key 2 test.t1.id 3 Using where; Not exists; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 2 test.t1.id 3 Using where; Not exists; Using join buffer (flat, BNLH join)
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.name is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 hash NULL hj_key 2 test.t1.id 3 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 2 test.t1.id 3 Using where; Using join buffer (flat, BNLH join)
select count(*) from t1 left join t2 on (t1.id = t2.owner);
count(*)
4
@ -339,11 +339,11 @@ Lilliana Angelovska NULL NULL
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 hash NULL hj_key 2 test.t1.id 3 Using where; Not exists; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 2 test.t1.id 3 Using where; Not exists; Using join buffer (flat, BNLH join)
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.name is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 hash NULL hj_key 2 test.t1.id 3 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 2 test.t1.id 3 Using where; Using join buffer (flat, BNLH join)
select count(*) from t2 right join t1 on (t1.id = t2.owner);
count(*)
4
@ -695,8 +695,8 @@ a1 a2 b1 b2 c1 c2
explain select * from t1 left join t2 on b1 = a1 left join t3 on c1 = a1 and b1 is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 hash NULL hj_key 4 test.t1.a1 2 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t3 hash NULL hj_key 5 test.t1.a1 2 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 4 test.t1.a1 2 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t3 hash_ALL NULL #hash#$hj 5 test.t1.a1 2 Using where; Using join buffer (incremental, BNLH join)
drop table t1, t2, t3;
create table t1 (
a int(11),

28
mysql-test/r/select_jcl6.result
View File

@ -1370,7 +1370,7 @@ id select_type table type possible_keys key key_len ref rows Extra
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL NULL NULL NULL NULL 12
1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1200 Using where; Not exists; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 1 test.t4.companynr 1200 Using where; Not exists; Using join buffer (flat, BNLH join)
select companynr,companyname from t2 left join t4 using (companynr) where companynr is null;
companynr companyname
select count(*) from t2 left join t4 using (companynr) where companynr is not null;
@ -1398,39 +1398,39 @@ id select_type table type possible_keys key key_len ref rows Extra
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 and companynr > 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL NULL NULL NULL NULL 12
1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0 or t4.companynr > 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12
1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where ifnull(t2.companynr,1)>0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL NULL NULL NULL NULL 12
1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0 or companynr > 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select companynr,companyname from t4 left join t2 using (companynr) where ifnull(companynr,1)>0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where
1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
companynr companynr
37 36
@ -1438,7 +1438,7 @@ companynr companynr
explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary
1 SIMPLE t2 hash NULL hj_key 1 func 1199 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 1 func 1199 Using where; Using join buffer (flat, BNLH join)
select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
fld1 companynr fld3 period
038008 37 reporters 1008
@ -2337,7 +2337,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 system NULL NULL NULL NULL 0 const row not found
1 SIMPLE t4 const id4 NULL NULL NULL 1
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
1 SIMPLE t2 hash NULL hj_key 4 test.t1.id1 1 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 4 test.t1.id1 1 Using where; Using join buffer (flat, BNLH join)
select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3
left join t4 on id3 = id4 where id2 = 1 or id4 = 1;
id1 id2 id3 id4 id44
@ -2917,11 +2917,11 @@ a
EXPLAIN SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
1 SIMPLE t2 hash NULL hj_key 5 test.t1.a 3 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.a 3 Using where; Using join buffer (flat, BNLH join)
EXPLAIN SELECT t1.a FROM t1 INNER JOIN t2 ON t1.a=t2.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 hash NULL hj_key 5 test.t2.a 5 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t1 hash_ALL NULL #hash#$hj 5 test.t2.a 5 Using where; Using join buffer (flat, BNLH join)
DROP TABLE t1,t2;
select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0;
x'10' + 0 X'10' + 0 b'10' + 0 B'10' + 0

14
mysql-test/r/subselect3_jcl6.result
View File

@ -1031,10 +1031,10 @@ explain select t21.* from t21,t22 where t21.a = t22.a and
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort
1 PRIMARY t21 hash NULL hj_key 4 test.t11.a 26 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY t22 hash NULL hj_key 4 test.t11.a 26 Using where; Using join buffer (incremental, BNLH join)
1 PRIMARY t21 hash_ALL NULL #hash#$hj 4 test.t11.a 26 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY t22 hash_ALL NULL #hash#$hj 4 test.t11.a 26 Using where; Using join buffer (incremental, BNLH join)
2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where
2 SUBQUERY t12 hash NULL hj_key 4 test.t11.a 8 Using where; Using join buffer (flat, BNLH join)
2 SUBQUERY t12 hash_ALL NULL #hash#$hj 4 test.t11.a 8 Using where; Using join buffer (flat, BNLH join)
select t21.* from t21,t22 where t21.a = t22.a and
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
a b c
@ -1155,7 +1155,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (incremental, BNL join)
1 PRIMARY C ALL NULL NULL NULL NULL 10 Using join buffer (incremental, BNL join)
1 PRIMARY D hash NULL hj_key 5 test.E.a 10 Using where; End temporary; Using join buffer (incremental, BNLH join)
1 PRIMARY D hash_ALL NULL #hash#$hj 5 test.E.a 10 Using where; End temporary; Using join buffer (incremental, BNLH join)
flush status;
select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E);
count(*)
@ -1193,11 +1193,11 @@ insert into t3 values (1),(2);
explain select * from t2 where a in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Start temporary
1 PRIMARY t1 hash NULL hj_key 4 test.t2.a 4 Using where; End temporary; Using join buffer (flat, BNLH join)
1 PRIMARY t1 hash_ALL NULL #hash#$hj 4 test.t2.a 4 Using where; End temporary; Using join buffer (flat, BNLH join)
explain select * from t2 where a in (select a from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Start temporary
1 PRIMARY t2 hash NULL hj_key 5 test.t2.a 2 Using where; End temporary; Using join buffer (flat, BNLH join)
1 PRIMARY t2 hash_ALL NULL #hash#$hj 5 test.t2.a 2 Using where; End temporary; Using join buffer (flat, BNLH join)
explain select * from t2 where a in (select a from t3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary
@ -1212,7 +1212,7 @@ insert into t1 values (1),(2);
explain select * from t1 where a in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; Start temporary
1 PRIMARY t1 hash NULL hj_key 6 test.t1.a 2 Using where; End temporary; Using join buffer (flat, BNLH join)
1 PRIMARY t1 hash_ALL NULL #hash#$hj 6 test.t1.a 2 Using where; End temporary; Using join buffer (flat, BNLH join)
drop table t1;
set @@optimizer_switch=@save_optimizer_switch;
create table t1 (a int);

6
mysql-test/r/subselect_sj2_jcl6.result
View File

@ -138,7 +138,7 @@ 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 subselect2 ALL unique_key NULL NULL NULL 22
1 PRIMARY ot hash NULL hj_key 5 test.it.a 32 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY ot hash_ALL NULL #hash#$hj 5 test.it.a 32 Using where; Using join buffer (flat, BNLH join)
2 SUBQUERY it ALL NULL NULL NULL NULL 22 Using where
select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
@ -206,7 +206,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
1 PRIMARY ot hash NULL hj_key 5 test.it.a 52 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY ot hash_ALL NULL #hash#$hj 5 test.it.a 52 Using where; Using join buffer (flat, BNLH join)
2 SUBQUERY it ALL NULL NULL NULL NULL 22 Using where
select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
@ -588,7 +588,7 @@ explain
select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY t2 hash NULL hj_key 5 test.t1.a 3 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY t2 hash_ALL NULL #hash#$hj 5 test.t1.a 3 Using where; Using join buffer (flat, BNLH join)
2 DEPENDENT SUBQUERY t3 unique_subquery PRIMARY PRIMARY 4 func 1 Using index
drop table t0, t1, t2, t3;
create table t1 (a int);

2
mysql-test/suite/innodb/r/innodb_mysql.result
View File

@ -2664,7 +2664,7 @@ SELECT t1.pk FROM t1,t2
WHERE t1.pk = t2.pk AND t2.pk <> 8;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 11 Using where; Using index
1 SIMPLE t2 hash PRIMARY PRIMARY 4 test.t1.pk 13 Using index; Using join buffer (flat, BNLH join)
1 SIMPLE t2 hash_range PRIMARY #hash#PRIMARY:PRIMARY 4:4 test.t1.pk 7 Using where; Using index; Using join buffer (flat, BNLH join)
SELECT t1.pk FROM t1,t2
WHERE t1.pk = t2.pk AND t2.pk <> 8;
pk

73
mysql-test/t/join_cache.test
View File

@ -146,6 +146,50 @@ SELECT City.Name, Country.Name, CountryLanguage.Language
CountryLanguage.Percentage > 50 AND
LENGTH(Language) < LENGTH(City.Name) - 2;
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND City.Population > 5000000
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND
(City.Population > 5000000 OR City.Name LIKE 'Za%')
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
CREATE INDEX City_Population ON City(Population);
CREATE INDEX City_Name ON City(Name);
ANALYZE TABLE City;
EXPLAIN
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND City.Population > 5000000
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND City.Population > 5000000
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
EXPLAIN
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND
(City.Population > 5000000 OR City.Name LIKE 'Za%')
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND
(City.Population > 5000000 OR City.Name LIKE 'Za%')
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
DROP INDEX City_Population ON City;
DROP INDEX City_Name ON City;
set join_cache_level=default;
set join_buffer_size=256;
@ -394,6 +438,35 @@ SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.P
Country.Population > 10000000;
--replace_column 9 #
EXPLAIN
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND City.Population > 5000000
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND City.Population > 5000000
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
CREATE INDEX City_Name ON City(Name);
EXPLAIN
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND
(City.Population > 5000000 OR City.Name LIKE 'Za%')
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
SELECT Country.Name, Country.Population, City.Name, City.Population
FROM Country LEFT JOIN City
ON City.Country=Country.Code AND
(City.Population > 5000000 OR City.Name LIKE 'Za%')
WHERE Country.Name LIKE 'C%' AND Country.Population > 10000000;
DROP INDEX City_Name ON City;
show variables like 'join_buffer_size';
set join_cache_level=5;
show variables like 'join_cache_level';

153
sql/sql_select.cc
View File

@ -42,8 +42,8 @@
const char *join_type_str[]={ "UNKNOWN","system","const","eq_ref","ref",
"MAYBE_REF","ALL","range","index","fulltext",
"ref_or_null","unique_subquery","index_subquery",
"index_merge","hash"
};
"index_merge", "hash_ALL", "hash_range",
"hash_index", "hash_index_merge" };
const char *copy_to_tmp_table= "Copying to tmp table";
@ -5055,19 +5055,20 @@ best_access_path(JOIN *join,
/* Estimate the cost of the hash join access to the table */
ha_rows rnd_records= matching_candidates_in_table(s, found_constraint);
tmp= s->table->file->scan_time();
tmp= s->quick ? s->quick->read_time : s->table->file->scan_time();
tmp+= (s->records - rnd_records)/(double) TIME_FOR_COMPARE;
/* We read the table as many times as join buffer becomes full. */
tmp*= (1.0 + floor((double) cache_record_length(join,idx) *
record_count /
(double) thd->variables.join_buff_size));
tmp+= (s->records - rnd_records)/(double) TIME_FOR_COMPARE;
best_time= tmp +
(record_count*join_sel) / TIME_FOR_COMPARE * rnd_records;
best= tmp;
records= rows2double(rnd_records);
best_key= hj_start_key;
best_ref_depends_map= 0;
best_uses_jbuf= test(!disable_jbuf);
best_uses_jbuf= TRUE;
}
/*
@ -6458,7 +6459,7 @@ static bool create_hj_key_for_table(JOIN *join, JOIN_TAB *join_tab,
keyinfo->key_length=0;
keyinfo->algorithm= HA_KEY_ALG_UNDEF;
keyinfo->flags= HA_GENERATED_KEY;
keyinfo->name= (char *) "hj_key";
keyinfo->name= (char *) "$hj";
keyinfo->rec_per_key= (ulong*) thd->calloc(sizeof(ulong)*key_parts);
if (!keyinfo->rec_per_key)
DBUG_RETURN(TRUE);
@ -7136,6 +7137,7 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
table_map current_map;
for (uint i=join->const_tables ; i < join->tables ; i++)
{
bool is_hj;
tab= join->join_tab+i;
/*
first_inner is the X in queries like:
@ -7195,9 +7197,20 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
/* Add conditions added by add_not_null_conds(). */
if (tab->select_cond)
add_cond_and_fix(&tmp, tab->select_cond);
is_hj= (tab->type == JT_REF || tab->type == JT_EQ_REF) &&
(join->allowed_join_cache_types & JOIN_CACHE_HASHED_BIT) &&
((join->max_allowed_join_cache_level+1)/2 == 2 ||
((join->max_allowed_join_cache_level+1)/2 > 2 &&
is_hash_join_key_no(tab->ref.key))) &&
(!tab->emb_sj_nest ||
join->allowed_semijoin_with_cache) &&
(!(tab->table->map & join->outer_join) ||
join->allowed_outer_join_with_cache);
if (cond && !tmp && tab->quick)
{ // Outer join
if (tab->type != JT_ALL)
if (tab->type != JT_ALL && !is_hj)
{
/*
Don't use the quick method
@ -7275,9 +7288,10 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
{
/* Use quick key read if it's a constant and it's not used
with key reading */
if (tab->needed_reg.is_clear_all() && tab->type != JT_EQ_REF
&& tab->type != JT_FT && (tab->type != JT_REF ||
(uint) tab->ref.key == tab->quick->index))
if ((tab->needed_reg.is_clear_all() && tab->type != JT_EQ_REF
&& tab->type != JT_FT &&
(tab->type != JT_REF ||
(uint) tab->ref.key == tab->quick->index)) || is_hj)
{
sel->quick=tab->quick; // Use value from get_quick_...
sel->quick_keys.clear_all();
@ -8261,6 +8275,9 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after)
if (jcl)
tab[-1].next_select=sub_select_cache;
if (tab->cache && tab->cache->get_join_alg() == JOIN_CACHE::BNLH_JOIN_ALG)
tab->type= JT_HASH;
switch (tab->type) {
case JT_SYSTEM: // Only happens with left join
case JT_CONST: // Only happens with left join
@ -8273,7 +8290,7 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after)
table->key_read=1;
table->file->extra(HA_EXTRA_KEYREAD);
}
else if ((!jcl || jcl > 4) && !tab->is_ref_for_hash_join())
else if (!jcl || jcl > 4)
push_index_cond(tab, tab->ref.key);
break;
case JT_EQ_REF:
@ -8285,7 +8302,7 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after)
table->key_read=1;
table->file->extra(HA_EXTRA_KEYREAD);
}
else if ((!jcl || jcl > 4) && !tab->is_ref_for_hash_join())
else if (!jcl || jcl > 4)
push_index_cond(tab, tab->ref.key);
break;
case JT_REF_OR_NULL:
@ -8300,10 +8317,11 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after)
if (table->covering_keys.is_set(tab->ref.key) &&
!table->no_keyread)
table->enable_keyread();
else if ((!jcl || jcl > 4) &&!tab->is_ref_for_hash_join())
else if (!jcl || jcl > 4)
push_index_cond(tab, tab->ref.key);
break;
case JT_ALL:
case JT_HASH:
/*
If previous table use cache
If the incoming data set is already sorted don't use cache.
@ -8377,7 +8395,8 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after)
*/
tab->index=find_shortest_key(table, & table->covering_keys);
tab->read_first_record= join_read_first;
tab->type=JT_NEXT; // Read with index_first / index_next
/* Read with index_first / index_next */
tab->type= tab->type == JT_ALL ? JT_NEXT : JT_HASH_NEXT;
}
}
if (tab->select && tab->select->quick &&
@ -8419,6 +8438,11 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after)
sort_by_tab->type= JT_ALL;
sort_by_tab->read_first_record= join_init_read_record;
}
else if (sort_by_tab->type == JT_HASH_NEXT)
{
sort_by_tab->type= JT_HASH;
sort_by_tab->read_first_record= join_init_read_record;
}
}
break;
}
@ -19051,7 +19075,7 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
TABLE *table=tab->table;
TABLE_LIST *table_list= tab->table->pos_in_table_list;
char buff[512];
char buff1[512], buff2[512], buff3[512];
char buff1[512], buff2[512], buff3[512], buff4[512];
char keylen_str_buf[64];
my_bool key_read;
String extra(buff, sizeof(buff),cs);
@ -19059,10 +19083,17 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
String tmp1(buff1,sizeof(buff1),cs);
String tmp2(buff2,sizeof(buff2),cs);
String tmp3(buff3,sizeof(buff3),cs);
String tmp4(buff4,sizeof(buff4),cs);
char hash_key_prefix[]= "#hash#";
KEY *key_info= 0;
uint key_len= 0;
bool is_hj= tab->type == JT_HASH || tab->type ==JT_HASH_NEXT;
extra.length(0);
tmp1.length(0);
tmp2.length(0);
tmp3.length(0);
tmp4.length(0);
quick_type= -1;
/* Don't show eliminated tables */
@ -19158,21 +19189,19 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
goto loop_end;
}
if (tab->type == JT_ALL && tab->select && tab->select->quick)
if ((tab->type == JT_ALL || tab->type == JT_HASH) &&
tab->select && tab->select->quick)
{
quick_type= tab->select->quick->get_type();
if ((quick_type == QUICK_SELECT_I::QS_TYPE_INDEX_MERGE) ||
(quick_type == QUICK_SELECT_I::QS_TYPE_INDEX_INTERSECT) ||
(quick_type == QUICK_SELECT_I::QS_TYPE_ROR_INTERSECT) ||
(quick_type == QUICK_SELECT_I::QS_TYPE_ROR_UNION))
tab->type = JT_INDEX_MERGE;
tab->type= tab->type == JT_ALL ? JT_INDEX_MERGE : JT_HASH_INDEX_MERGE;
else
tab->type = JT_RANGE;
tab->type= tab->type == JT_ALL ? JT_RANGE : JT_HASH_RANGE;
}
if (tab->cache && tab->cache->get_join_alg() == JOIN_CACHE::BNLH_JOIN_ALG)
tab->type= JT_HASH;
/* table */
if (table->derived_select_number)
{
@ -19234,45 +19263,66 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
item_list.push_back(item_null);
/* Build "key", "key_len", and "ref" values and add them to item_list */
if (tab->ref.key_parts)
if (tab->type == JT_NEXT)
{
key_info= table->key_info+tab->index;
key_len= key_info->key_length;
}
else if (tab->ref.key_parts)
{
key_info= tab->get_keyinfo_by_key_no(tab->ref.key);
key_len= tab->ref.key_length;
}
if (key_info)
{
KEY *key_info= tab->get_keyinfo_by_key_no(tab->ref.key);
register uint length;
item_list.push_back(new Item_string(key_info->name,
strlen(key_info->name),
system_charset_info));
length= (longlong10_to_str(tab->ref.key_length, keylen_str_buf, 10) -
if (is_hj)
tmp2.append(hash_key_prefix, strlen(hash_key_prefix), cs);
tmp2.append(key_info->name, strlen(key_info->name), cs);
length= (longlong10_to_str(key_len, keylen_str_buf, 10) -
keylen_str_buf);
item_list.push_back(new Item_string(keylen_str_buf, length,
system_charset_info));
for (store_key **ref=tab->ref.key_copy ; *ref ; ref++)
tmp3.append(keylen_str_buf, length, cs);
if (tab->ref.key_parts)
{
if (tmp2.length())
tmp2.append(',');
tmp2.append((*ref)->name(), strlen((*ref)->name()),
system_charset_info);
}
item_list.push_back(new Item_string(tmp2.ptr(),tmp2.length(),cs));
for (store_key **ref=tab->ref.key_copy ; *ref ; ref++)
{
if (tmp4.length())
tmp4.append(',');
tmp4.append((*ref)->name(), strlen((*ref)->name()), cs);
}
}
}
else if (tab->type == JT_NEXT)
if (is_hj && tab->type != JT_HASH)
{
tmp2.append(':');
tmp3.append(':');
}
if (tab->type == JT_HASH_NEXT)
{
KEY *key_info=table->key_info+ tab->index;
register uint length;
item_list.push_back(new Item_string(key_info->name,
strlen(key_info->name),cs));
length= (longlong10_to_str(key_info->key_length, keylen_str_buf, 10) -
key_info= table->key_info+tab->index;
key_len= key_info->key_length;
tmp2.append(key_info->name, strlen(key_info->name), cs);
length= (longlong10_to_str(key_len, keylen_str_buf, 10) -
keylen_str_buf);
item_list.push_back(new Item_string(keylen_str_buf,
length,
system_charset_info));
item_list.push_back(item_null);
tmp3.append(keylen_str_buf, length, cs);
}
else if (tab->select && tab->select->quick)
{
if (tab->select && tab->select->quick)
tab->select->quick->add_keys_and_lengths(&tmp2, &tmp3);
item_list.push_back(new Item_string(tmp2.ptr(),tmp2.length(),cs));
item_list.push_back(new Item_string(tmp3.ptr(),tmp3.length(),cs));
item_list.push_back(item_null);
if (key_info || (tab->select && tab->select->quick))
{
if (tmp2.length())
item_list.push_back(new Item_string(tmp2.ptr(),tmp2.length(),cs));
else
item_list.push_back(item_null);
if (tmp3.length())
item_list.push_back(new Item_string(tmp3.ptr(),tmp3.length(),cs));
else
item_list.push_back(item_null);
if (key_info && tab->type != JT_NEXT)
item_list.push_back(new Item_string(tmp4.ptr(),tmp4.length(),cs));
else
item_list.push_back(item_null);
}
else
{
@ -19320,8 +19370,7 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
ha_rows examined_rows;
if (tab->select && tab->select->quick)
examined_rows= tab->select->quick->records;
else if (tab->type == JT_NEXT || tab->type == JT_ALL ||
tab->type == JT_HASH)
else if (tab->type == JT_NEXT || tab->type == JT_ALL || is_hj)
{
if (tab->limit)
examined_rows= tab->limit;

2
sql/sql_select.h
View File

@ -135,7 +135,7 @@ typedef struct st_table_ref
enum join_type { JT_UNKNOWN,JT_SYSTEM,JT_CONST,JT_EQ_REF,JT_REF,JT_MAYBE_REF,
JT_ALL, JT_RANGE, JT_NEXT, JT_FT, JT_REF_OR_NULL,
JT_UNIQUE_SUBQUERY, JT_INDEX_SUBQUERY, JT_INDEX_MERGE,
JT_HASH};
JT_HASH, JT_HASH_RANGE, JT_HASH_NEXT, JT_HASH_INDEX_MERGE};
class JOIN;