BNLH algorithm always used a full table scan over the joined table

even in the cases when there existed range/index-merge scans that
were cheaper than the full table scan.
This was a defect/bug of the implementation of mwl #128. 
Now hash join can work not only with full table scan of the joined
table, but also with full index scan, range and index-merge scans.
Accordingly, in the cases when hash join is used the column 'type'
in the EXPLAINs can contain now 'hash_ALL', 'hash_index', 'hash_range'
and 'hash_index_merge'. If hash join is coupled with a range/index_merge
scan then the columns 'key' and 'key_len' contain info not only on
the used hash index, but also on the indexes used for the scan.   

mysql-test/r/join_cache.result

@@ -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	17	Using index condition; Using where; Using MRR
+1	SIMPLE	City	hash_range	Population,Country	#hash#Country:Population	3:4	world.Country.Code	31	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

mysql-test/r/join_nested_jcl6.result

@@ -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);

mysql-test/r/join_outer_jcl6.result

@@ -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),

mysql-test/r/select_jcl6.result

@@ -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

mysql-test/r/subselect3_jcl6.result

@@ -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);

mysql-test/r/subselect_sj2_jcl6.result

@@ -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);

mysql-test/suite/innodb/r/innodb_mysql.result

@@ -2656,7 +2656,7 @@ 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

mysql-test/t/join_cache.test

@@ -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 +438,34 @@ SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.P
        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
+   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';

sql/sql_select.cc

@@ -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();
@@ -8260,6 +8274,9 @@ 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 
@@ -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;
     }
@@ -19045,7 +19069,7 @@ 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);
@@ -19053,10 +19077,17 @@ 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 */
@@ -19152,21 +19183,19 @@ 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)
       {
@@ -19228,45 +19257,66 @@ 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)
       {
-	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) - 
-                 keylen_str_buf);
-        item_list.push_back(new Item_string(keylen_str_buf, 
-                                            length,
-                                            system_charset_info));
-	item_list.push_back(item_null);
+        tmp2.append(':');
+        tmp3.append(':');
       }
-      else if (tab->select && tab->select->quick)
+      if (tab->type == JT_HASH_NEXT)
       {
+        register uint length;
+	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);
+        tmp3.append(keylen_str_buf, length, cs);
+      }         
+      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
       {
@@ -19314,8 +19364,7 @@ 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;

sql/sql_select.h

@@ -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;