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| From: | igor | Date: | April 6 2008 9:20am |
| Subject: | bk commit into 6.0 tree (igor:1.2608) | ||
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Below is the list of changes that have just been committed into a local 6.0 repository of igor. When igor does a push these changes will be propagated to the main repository and, within 24 hours after the push, to the public repository. For information on how to access the public repository see http://dev.mysql.com/doc/mysql/en/installing-source-tree.html ChangeSet@stripped, 2008-04-06 00:20:43-07:00, igor@stripped +11 -0 Completed the function check_join_cache_usage taht determines whether a join buffer can be used to access a join table. Fixed many minor bugs/typos that made the code non-functional in many cases. Fixed a bug that caused serious problems with linking records: introduced the curr_rec_link member to JOIN_CACHE. mysql-test/r/index_merge_myisam.result@stripped, 2008-04-06 00:20:36-07:00, igor@stripped +0 -2 Adjusted test result after changing the lower limit for join_buffer_size. mysql-test/r/join_cache.result@stripped, 2008-04-06 00:20:36-07:00, igor@stripped +1076 -0 Added new test cases. mysql-test/r/join_nested_jcl6.result@stripped, 2008-04-05 23:35:11-07:00, igor@stripped +1756 -0 BitKeeper file /home/igor/dev-opt/mysql-6.0-bka-preview/mysql-test/r/join_nested_jcl6.result mysql-test/r/join_nested_jcl6.result@stripped, 2008-04-05 23:35:11-07:00, igor@stripped +0 -0 mysql-test/r/subselect_sj2.result@stripped, 2008-04-06 00:20:37-07:00, igor@stripped +0 -4 Adjusted test result after changing the lower limit for join_buffer_size. mysql-test/suite/falcon/r/falcon_select.result@stripped, 2008-04-06 00:20:37-07:00, igor@stripped +10 -10 Adjusted results that should been adjusted before the commit with the BKA code. mysql-test/suite/ndb/r/ndb_condition_pushdown.result@stripped, 2008-04-06 00:20:37-07:00, igor@stripped +1 -1 Adjusted results. mysql-test/t/join_cache.test@stripped, 2008-04-06 00:20:37-07:00, igor@stripped +219 -0 Added test cases. mysql-test/t/join_nested_jcl6.test@stripped, 2008-04-05 23:34:57-07:00, igor@stripped +11 -0 BitKeeper file /home/igor/dev-opt/mysql-6.0-bka-preview/mysql-test/t/join_nested_jcl6.test mysql-test/t/join_nested_jcl6.test@stripped, 2008-04-05 23:34:57-07:00, igor@stripped +0 -0 sql/handler.cc@stripped, 2008-04-06 00:20:37-07:00, igor@stripped +1 -1 Removed a warning. sql/sql_select.cc@stripped, 2008-04-06 00:20:37-07:00, igor@stripped +137 -55 Completed the function check_join_cache_usage taht determines whether a join buffer can be used to access a join table. Fixed many minor bugs/typos that made the code non-functional in many cases. Fixed a bug that caused serious problems with linking records: introduced the curr_rec_link member to JOIN_CACHE. Used the flag HA_MRR_SEMI_JOIN when appropriate that tells the MRR interface not to fetch a row with a given association if there is a match for the associated record. sql/sql_select.h@stripped, 2008-04-06 00:20:37-07:00, igor@stripped +38 -5 Fixed a bug that caused serious problems with linking records: introduced the curr_rec_link member to JOIN_CACHE. The value of mrr_mode must be received from the call of multi_range_read_info and passed to the cache constructor. diff -Nrup a/mysql-test/r/index_merge_myisam.result b/mysql-test/r/index_merge_myisam.result --- a/mysql-test/r/index_merge_myisam.result 2008-01-10 14:04:52 -08:00 +++ b/mysql-test/r/index_merge_myisam.result 2008-04-06 00:20:36 -07:00 @@ -342,8 +342,6 @@ create table t4 (a int); insert into t4 values (1),(4),(3); set @save_join_buffer_size=@@join_buffer_size; set join_buffer_size= 4000; -Warnings: -Warning 1292 Truncated incorrect join_buffer_size value: '4000' explain select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) from t0 as A force index(i1,i2), t0 as B force index (i1,i2) where (A.key1 < 500000 or A.key2 < 3) diff -Nrup a/mysql-test/r/join_cache.result b/mysql-test/r/join_cache.result --- a/mysql-test/r/join_cache.result 2008-03-31 22:22:55 -07:00 +++ b/mysql-test/r/join_cache.result 2008-04-06 00:20:36 -07:00 @@ -698,3 +698,1079 @@ Variable_name Value join_buffer_size 131072 Variable_name Value join_cache_level 1 +Variable_name Value +join_buffer_size 131072 +Variable_name Value +join_cache_level 5 +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 ref Population,Country Country 3 world.Country.Code 8 Using where; Using join buffer +Name Name +Vientiane Laos +Riga Latvia +Daugavpils Latvia +Maseru Lesotho +Beirut Lebanon +Tripoli Lebanon +Monrovia Liberia +Tripoli Libyan Arab Jamahiriya +Bengasi Libyan Arab Jamahiriya +Misrata Libyan Arab Jamahiriya +Vilnius Lithuania +Kaunas Lithuania +Klaipeda Lithuania +?iauliai Lithuania +Panevezys Lithuania +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 eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer +1 SIMPLE City ref Country Country 3 world.Country.Code 8 Using where; Using join buffer +Name Name Language +Leiden Netherlands Dutch +La Matanza Argentina Spanish +Lomas de Zamora Argentina Spanish +La Plata Argentina Spanish +Lanús Argentina Spanish +Las Heras Argentina Spanish +La Rioja Argentina Spanish +Liège Belgium Dutch +La Paz Bolivia Spanish +Londrina Brazil Portuguese +Limeira Brazil Portuguese +Lages Brazil Portuguese +Luziânia Brazil Portuguese +Lauro de Freitas Brazil Portuguese +Linhares Brazil Portuguese +London United Kingdom English +Liverpool United Kingdom English +Leeds United Kingdom English +Leicester United Kingdom English +Luton United Kingdom English +Los Angeles Chile Spanish +La Serena Chile Spanish +La Romana Dominican Republic Spanish +Loja Ecuador Spanish +Luxor Egypt Arabic +Las Palmas de Gran Canaria Spain Spanish +L´Hospitalet de Llobregat Spain Spanish +Leganés Spain Spanish +León Spain Spanish +Logroño Spain Spanish +Lleida (Lérida) Spain Spanish +Le-Cap-Haïtien Haiti Haiti Creole +La Ceiba Honduras Spanish +Livorno Italy Italian +Latina Italy Italian +Lecce Italy Italian +La Spezia Italy Italian +Linz Austria German +London Canada English +Laval Canada English +Longueuil Canada English +Lanzhou China Chinese +Luoyang China Chinese +Liuzhou China Chinese +Liaoyang China Chinese +Liupanshui China Chinese +Liaoyuan China Chinese +Lianyungang China Chinese +Leshan China Chinese +Linyi China Chinese +Luzhou China Chinese +Laiwu China Chinese +Liaocheng China Chinese +Laizhou China Chinese +Linfen China Chinese +Liangcheng China Chinese +Longkou China Chinese +Langfang China Chinese +Liu´an China Chinese +Longjing China Chinese +Lengshuijiang China Chinese +Laiyang China Chinese +Longyan China Chinese +Linhe China Chinese +Leiyang China Chinese +Loudi China Chinese +Luohe China Chinese +Linqing China Chinese +Laohekou China Chinese +Linchuan China Chinese +Lhasa China Chinese +Lianyuan China Chinese +Liyang China Chinese +Liling China Chinese +Linhai China Chinese +Larisa Greece Greek +La Habana Cuba Spanish +Lilongwe Malawi Chichewa +León Mexico Spanish +La Paz Mexico Spanish +La Paz Mexico Spanish +Lázaro Cárdenas Mexico Spanish +Lagos de Moreno Mexico Spanish +Lerdo Mexico Spanish +Los Cabos Mexico Spanish +Lerma Mexico Spanish +Las Margaritas Mexico Spanish +Lashio (Lasho) Myanmar Burmese +Lalitapur Nepal Nepali +León Nicaragua Spanish +Lambaré Paraguay Spanish +Lima Peru Spanish +Lisboa Portugal Portuguese +Lódz Poland Polish +Lublin Poland Polish +Legnica Poland Polish +Lyon France French +Le Havre France French +Lille France French +Le Mans France French +Limoges France French +Linköping Sweden Swedish +Lund Sweden Swedish +Leipzig Germany German +Lübeck Germany German +Ludwigshafen am Rhein Germany German +Leverkusen Germany German +Lünen Germany German +Lahti Finland Finnish +Lausanne Switzerland German +Latakia Syria Arabic +Luchou Taiwan Min +Lungtan Taiwan Min +Liberec Czech Republic Czech +Lviv Ukraine Ukrainian +Lugansk Ukraine Ukrainian +Lutsk Ukraine Ukrainian +Lysyt?ansk Ukraine Ukrainian +Lower Hutt New Zealand English +Lida Belarus Belorussian +Los Teques Venezuela Spanish +Lipetsk Russian Federation Russian +Ljubertsy Russian Federation Russian +Leninsk-Kuznetski Russian Federation Russian +Long Xuyen Vietnam Vietnamese +Los Angeles United States English +Las Vegas United States English +Long Beach United States English +Lexington-Fayette United States English +Louisville United States English +Lincoln United States English +Lubbock United States English +Little Rock United States English +Laredo United States English +Lakewood United States English +Lansing United States English +Lancaster United States English +Lafayette United States English +Lowell United States English +Livonia United States English +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY Country ALL PRIMARY,Name NULL NULL NULL 239 Using where +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 8 Using where; Using join buffer +Name +Vientiane +Riga +Daugavpils +Maseru +Beirut +Tripoli +Monrovia +Tripoli +Bengasi +Misrata +Vilnius +Kaunas +Klaipeda +?iauliai +Panevezys +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 eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer +Name IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) +Australia 81.2 +United Kingdom 97.3 +Canada 60.4 +United States 86.2 +Zimbabwe 2.2 +Japan 0.1 +South Africa 8.5 +Malaysia 1.6 +Afghanistan NULL +Netherlands NULL +Algeria NULL +Angola NULL +Argentina NULL +Bangladesh NULL +Belgium NULL +Brazil NULL +Burkina Faso NULL +Chile NULL +Ecuador NULL +Egypt NULL +Spain NULL +Ethiopia NULL +Philippines NULL +Ghana NULL +Guatemala NULL +Indonesia NULL +India NULL +Iraq NULL +Iran NULL +Italy NULL +Yemen NULL +Yugoslavia NULL +Cambodia NULL +Cameroon NULL +Kazakstan NULL +Kenya NULL +China NULL +Colombia NULL +Congo, The Democratic Republic of the NULL +North Korea NULL +South Korea NULL +Greece NULL +Cuba NULL +Madagascar NULL +Malawi NULL +Mali NULL +Morocco NULL +Mexico NULL +Mozambique NULL +Myanmar NULL +Nepal NULL +Niger NULL +Nigeria NULL +Côte d?Ivoire NULL +Pakistan NULL +Peru NULL +Poland NULL +France NULL +Romania NULL +Germany NULL +Saudi Arabia NULL +Somalia NULL +Sri Lanka NULL +Sudan NULL +Syria NULL +Taiwan NULL +Tanzania NULL +Thailand NULL +Czech Republic NULL +Turkey NULL +Uganda NULL +Ukraine NULL +Hungary NULL +Uzbekistan NULL +Belarus NULL +Venezuela NULL +Russian Federation NULL +Vietnam NULL +Variable_name Value +join_cache_level 6 +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 ref Population,Country Country 3 world.Country.Code 8 Using where; Using join buffer +Name Name +Vientiane Laos +Riga Latvia +Daugavpils Latvia +Maseru Lesotho +Beirut Lebanon +Tripoli Lebanon +Monrovia Liberia +Tripoli Libyan Arab Jamahiriya +Bengasi Libyan Arab Jamahiriya +Misrata Libyan Arab Jamahiriya +Vilnius Lithuania +Kaunas Lithuania +Klaipeda Lithuania +?iauliai Lithuania +Panevezys Lithuania +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 eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer +1 SIMPLE City ref Country Country 3 world.Country.Code 8 Using where; Using join buffer +Name Name Language +Leiden Netherlands Dutch +La Matanza Argentina Spanish +Lomas de Zamora Argentina Spanish +La Plata Argentina Spanish +Lanús Argentina Spanish +Las Heras Argentina Spanish +La Rioja Argentina Spanish +Liège Belgium Dutch +La Paz Bolivia Spanish +Londrina Brazil Portuguese +Limeira Brazil Portuguese +Lages Brazil Portuguese +Luziânia Brazil Portuguese +Lauro de Freitas Brazil Portuguese +Linhares Brazil Portuguese +London United Kingdom English +Liverpool United Kingdom English +Leeds United Kingdom English +Leicester United Kingdom English +Luton United Kingdom English +Los Angeles Chile Spanish +La Serena Chile Spanish +La Romana Dominican Republic Spanish +Loja Ecuador Spanish +Luxor Egypt Arabic +Las Palmas de Gran Canaria Spain Spanish +L´Hospitalet de Llobregat Spain Spanish +Leganés Spain Spanish +León Spain Spanish +Logroño Spain Spanish +Lleida (Lérida) Spain Spanish +Le-Cap-Haïtien Haiti Haiti Creole +La Ceiba Honduras Spanish +Livorno Italy Italian +Latina Italy Italian +Lecce Italy Italian +La Spezia Italy Italian +Linz Austria German +London Canada English +Laval Canada English +Longueuil Canada English +Lanzhou China Chinese +Luoyang China Chinese +Liuzhou China Chinese +Liaoyang China Chinese +Liupanshui China Chinese +Liaoyuan China Chinese +Lianyungang China Chinese +Leshan China Chinese +Linyi China Chinese +Luzhou China Chinese +Laiwu China Chinese +Liaocheng China Chinese +Laizhou China Chinese +Linfen China Chinese +Liangcheng China Chinese +Longkou China Chinese +Langfang China Chinese +Liu´an China Chinese +Longjing China Chinese +Lengshuijiang China Chinese +Laiyang China Chinese +Longyan China Chinese +Linhe China Chinese +Leiyang China Chinese +Loudi China Chinese +Luohe China Chinese +Linqing China Chinese +Laohekou China Chinese +Linchuan China Chinese +Lhasa China Chinese +Lianyuan China Chinese +Liyang China Chinese +Liling China Chinese +Linhai China Chinese +Larisa Greece Greek +La Habana Cuba Spanish +Lilongwe Malawi Chichewa +León Mexico Spanish +La Paz Mexico Spanish +La Paz Mexico Spanish +Lázaro Cárdenas Mexico Spanish +Lagos de Moreno Mexico Spanish +Lerdo Mexico Spanish +Los Cabos Mexico Spanish +Lerma Mexico Spanish +Las Margaritas Mexico Spanish +Lashio (Lasho) Myanmar Burmese +Lalitapur Nepal Nepali +León Nicaragua Spanish +Lambaré Paraguay Spanish +Lima Peru Spanish +Lisboa Portugal Portuguese +Lódz Poland Polish +Lublin Poland Polish +Legnica Poland Polish +Lyon France French +Le Havre France French +Lille France French +Le Mans France French +Limoges France French +Linköping Sweden Swedish +Lund Sweden Swedish +Leipzig Germany German +Lübeck Germany German +Ludwigshafen am Rhein Germany German +Leverkusen Germany German +Lünen Germany German +Lahti Finland Finnish +Lausanne Switzerland German +Latakia Syria Arabic +Luchou Taiwan Min +Lungtan Taiwan Min +Liberec Czech Republic Czech +Lviv Ukraine Ukrainian +Lugansk Ukraine Ukrainian +Lutsk Ukraine Ukrainian +Lysyt?ansk Ukraine Ukrainian +Lower Hutt New Zealand English +Lida Belarus Belorussian +Los Teques Venezuela Spanish +Lipetsk Russian Federation Russian +Ljubertsy Russian Federation Russian +Leninsk-Kuznetski Russian Federation Russian +Long Xuyen Vietnam Vietnamese +Los Angeles United States English +Las Vegas United States English +Long Beach United States English +Lexington-Fayette United States English +Louisville United States English +Lincoln United States English +Lubbock United States English +Little Rock United States English +Laredo United States English +Lakewood United States English +Lansing United States English +Lancaster United States English +Lafayette United States English +Lowell United States English +Livonia United States English +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY Country ALL PRIMARY,Name NULL NULL NULL 239 Using where +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 8 Using where; Using join buffer +Name +Vientiane +Riga +Daugavpils +Maseru +Beirut +Tripoli +Monrovia +Tripoli +Bengasi +Misrata +Vilnius +Kaunas +Klaipeda +?iauliai +Panevezys +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 eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer +Name IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) +Australia 81.2 +United Kingdom 97.3 +Canada 60.4 +United States 86.2 +Zimbabwe 2.2 +Japan 0.1 +South Africa 8.5 +Malaysia 1.6 +Afghanistan NULL +Netherlands NULL +Algeria NULL +Angola NULL +Argentina NULL +Bangladesh NULL +Belgium NULL +Brazil NULL +Burkina Faso NULL +Chile NULL +Ecuador NULL +Egypt NULL +Spain NULL +Ethiopia NULL +Philippines NULL +Ghana NULL +Guatemala NULL +Indonesia NULL +India NULL +Iraq NULL +Iran NULL +Italy NULL +Yemen NULL +Yugoslavia NULL +Cambodia NULL +Cameroon NULL +Kazakstan NULL +Kenya NULL +China NULL +Colombia NULL +Congo, The Democratic Republic of the NULL +North Korea NULL +South Korea NULL +Greece NULL +Cuba NULL +Madagascar NULL +Malawi NULL +Mali NULL +Morocco NULL +Mexico NULL +Mozambique NULL +Myanmar NULL +Nepal NULL +Niger NULL +Nigeria NULL +Côte d?Ivoire NULL +Pakistan NULL +Peru NULL +Poland NULL +France NULL +Romania NULL +Germany NULL +Saudi Arabia NULL +Somalia NULL +Sri Lanka NULL +Sudan NULL +Syria NULL +Taiwan NULL +Tanzania NULL +Thailand NULL +Czech Republic NULL +Turkey NULL +Uganda NULL +Ukraine NULL +Hungary NULL +Uzbekistan NULL +Belarus NULL +Venezuela NULL +Russian Federation NULL +Vietnam NULL +Variable_name Value +join_buffer_size 256 +Variable_name Value +join_cache_level 5 +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 ref Population,Country Country 3 world.Country.Code 8 Using where; Using join buffer +Name Name +Vientiane Laos +Riga Latvia +Daugavpils Latvia +Maseru Lesotho +Beirut Lebanon +Tripoli Lebanon +Monrovia Liberia +Tripoli Libyan Arab Jamahiriya +Bengasi Libyan Arab Jamahiriya +Misrata Libyan Arab Jamahiriya +Vilnius Lithuania +Kaunas Lithuania +Klaipeda Lithuania +?iauliai Lithuania +Panevezys Lithuania +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 eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer +1 SIMPLE City ref Country Country 3 world.Country.Code 8 Using where; Using join buffer +Name Name Language +Leiden Netherlands Dutch +La Matanza Argentina Spanish +Lomas de Zamora Argentina Spanish +La Plata Argentina Spanish +Lanús Argentina Spanish +Las Heras Argentina Spanish +La Rioja Argentina Spanish +Liège Belgium Dutch +La Paz Bolivia Spanish +Londrina Brazil Portuguese +Limeira Brazil Portuguese +Lages Brazil Portuguese +Luziânia Brazil Portuguese +Lauro de Freitas Brazil Portuguese +Linhares Brazil Portuguese +London United Kingdom English +Liverpool United Kingdom English +Leeds United Kingdom English +Leicester United Kingdom English +Luton United Kingdom English +Los Angeles Chile Spanish +La Serena Chile Spanish +La Romana Dominican Republic Spanish +Loja Ecuador Spanish +Luxor Egypt Arabic +Las Palmas de Gran Canaria Spain Spanish +L´Hospitalet de Llobregat Spain Spanish +Leganés Spain Spanish +León Spain Spanish +Logroño Spain Spanish +Lleida (Lérida) Spain Spanish +Le-Cap-Haïtien Haiti Haiti Creole +La Ceiba Honduras Spanish +Livorno Italy Italian +Latina Italy Italian +Lecce Italy Italian +La Spezia Italy Italian +Linz Austria German +London Canada English +Laval Canada English +Longueuil Canada English +Lanzhou China Chinese +Luoyang China Chinese +Liuzhou China Chinese +Liaoyang China Chinese +Liupanshui China Chinese +Liaoyuan China Chinese +Lianyungang China Chinese +Leshan China Chinese +Linyi China Chinese +Luzhou China Chinese +Laiwu China Chinese +Liaocheng China Chinese +Laizhou China Chinese +Linfen China Chinese +Liangcheng China Chinese +Longkou China Chinese +Langfang China Chinese +Liu´an China Chinese +Longjing China Chinese +Lengshuijiang China Chinese +Laiyang China Chinese +Longyan China Chinese +Linhe China Chinese +Leiyang China Chinese +Loudi China Chinese +Luohe China Chinese +Linqing China Chinese +Laohekou China Chinese +Linchuan China Chinese +Lhasa China Chinese +Lianyuan China Chinese +Liyang China Chinese +Liling China Chinese +Linhai China Chinese +Larisa Greece Greek +La Habana Cuba Spanish +Lilongwe Malawi Chichewa +León Mexico Spanish +La Paz Mexico Spanish +La Paz Mexico Spanish +Lázaro Cárdenas Mexico Spanish +Lagos de Moreno Mexico Spanish +Lerdo Mexico Spanish +Los Cabos Mexico Spanish +Lerma Mexico Spanish +Las Margaritas Mexico Spanish +Lashio (Lasho) Myanmar Burmese +Lalitapur Nepal Nepali +León Nicaragua Spanish +Lambaré Paraguay Spanish +Lima Peru Spanish +Lisboa Portugal Portuguese +Lódz Poland Polish +Lublin Poland Polish +Legnica Poland Polish +Lyon France French +Le Havre France French +Lille France French +Le Mans France French +Limoges France French +Linköping Sweden Swedish +Lund Sweden Swedish +Leipzig Germany German +Lübeck Germany German +Ludwigshafen am Rhein Germany German +Leverkusen Germany German +Lünen Germany German +Lahti Finland Finnish +Lausanne Switzerland German +Latakia Syria Arabic +Luchou Taiwan Min +Lungtan Taiwan Min +Liberec Czech Republic Czech +Lviv Ukraine Ukrainian +Lugansk Ukraine Ukrainian +Lutsk Ukraine Ukrainian +Lysyt?ansk Ukraine Ukrainian +Lower Hutt New Zealand English +Lida Belarus Belorussian +Los Teques Venezuela Spanish +Lipetsk Russian Federation Russian +Ljubertsy Russian Federation Russian +Leninsk-Kuznetski Russian Federation Russian +Long Xuyen Vietnam Vietnamese +Los Angeles United States English +Las Vegas United States English +Long Beach United States English +Lexington-Fayette United States English +Louisville United States English +Lincoln United States English +Lubbock United States English +Little Rock United States English +Laredo United States English +Lakewood United States English +Lansing United States English +Lancaster United States English +Lafayette United States English +Lowell United States English +Livonia United States English +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY Country ALL PRIMARY,Name NULL NULL NULL 239 Using where +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 8 Using where; Using join buffer +Name +Vientiane +Riga +Daugavpils +Maseru +Beirut +Tripoli +Monrovia +Tripoli +Bengasi +Misrata +Vilnius +Kaunas +Klaipeda +?iauliai +Panevezys +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 eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer +Name IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) +Afghanistan NULL +Netherlands NULL +Algeria NULL +Angola NULL +Australia 81.2 +Argentina NULL +Bangladesh NULL +Belgium NULL +United Kingdom 97.3 +Brazil NULL +Burkina Faso NULL +Chile NULL +South Africa 8.5 +Ecuador NULL +Egypt NULL +Spain NULL +Ethiopia NULL +Philippines NULL +Ghana NULL +Guatemala NULL +Indonesia NULL +India NULL +Iraq NULL +Iran NULL +Japan 0.1 +Italy NULL +Yemen NULL +Yugoslavia NULL +Cambodia NULL +Canada 60.4 +Cameroon NULL +Kazakstan NULL +Kenya NULL +China NULL +Colombia NULL +Congo, The Democratic Republic of the NULL +North Korea NULL +South Korea NULL +Greece NULL +Cuba NULL +Madagascar NULL +Malaysia 1.6 +Malawi NULL +Mali NULL +Morocco NULL +Mexico NULL +Mozambique NULL +Myanmar NULL +Nepal NULL +Niger NULL +Nigeria NULL +Côte d?Ivoire NULL +Pakistan NULL +Peru NULL +Poland NULL +France NULL +Romania NULL +Germany NULL +Saudi Arabia NULL +Somalia NULL +Sri Lanka NULL +Sudan NULL +Syria NULL +Taiwan NULL +Tanzania NULL +Thailand NULL +Czech Republic NULL +Turkey NULL +Uganda NULL +Ukraine NULL +Hungary NULL +Uzbekistan NULL +Belarus NULL +United States 86.2 +Venezuela NULL +Russian Federation NULL +Vietnam NULL +Zimbabwe 2.2 +Variable_name Value +join_cache_level 6 +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 ref Population,Country Country 3 world.Country.Code 8 Using where; Using join buffer +Name Name +Vientiane Laos +Riga Latvia +Daugavpils Latvia +Maseru Lesotho +Beirut Lebanon +Tripoli Lebanon +Monrovia Liberia +Tripoli Libyan Arab Jamahiriya +Bengasi Libyan Arab Jamahiriya +Misrata Libyan Arab Jamahiriya +Vilnius Lithuania +Kaunas Lithuania +Klaipeda Lithuania +?iauliai Lithuania +Panevezys Lithuania +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 eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer +1 SIMPLE City ref Country Country 3 world.Country.Code 8 Using where; Using join buffer +Name Name Language +Leiden Netherlands Dutch +La Matanza Argentina Spanish +Lomas de Zamora Argentina Spanish +La Plata Argentina Spanish +Lanús Argentina Spanish +Las Heras Argentina Spanish +La Rioja Argentina Spanish +Liège Belgium Dutch +La Paz Bolivia Spanish +Londrina Brazil Portuguese +Limeira Brazil Portuguese +Lages Brazil Portuguese +Luziânia Brazil Portuguese +Lauro de Freitas Brazil Portuguese +Linhares Brazil Portuguese +London United Kingdom English +Liverpool United Kingdom English +Leeds United Kingdom English +Leicester United Kingdom English +Luton United Kingdom English +Los Angeles Chile Spanish +La Serena Chile Spanish +La Romana Dominican Republic Spanish +Loja Ecuador Spanish +Luxor Egypt Arabic +Las Palmas de Gran Canaria Spain Spanish +L´Hospitalet de Llobregat Spain Spanish +Leganés Spain Spanish +León Spain Spanish +Logroño Spain Spanish +Lleida (Lérida) Spain Spanish +Le-Cap-Haïtien Haiti Haiti Creole +La Ceiba Honduras Spanish +Livorno Italy Italian +Latina Italy Italian +Lecce Italy Italian +La Spezia Italy Italian +Linz Austria German +London Canada English +Laval Canada English +Longueuil Canada English +Lanzhou China Chinese +Luoyang China Chinese +Liuzhou China Chinese +Liaoyang China Chinese +Liupanshui China Chinese +Liaoyuan China Chinese +Lianyungang China Chinese +Leshan China Chinese +Linyi China Chinese +Luzhou China Chinese +Laiwu China Chinese +Liaocheng China Chinese +Laizhou China Chinese +Linfen China Chinese +Liangcheng China Chinese +Longkou China Chinese +Langfang China Chinese +Liu´an China Chinese +Longjing China Chinese +Lengshuijiang China Chinese +Laiyang China Chinese +Longyan China Chinese +Linhe China Chinese +Leiyang China Chinese +Loudi China Chinese +Luohe China Chinese +Linqing China Chinese +Laohekou China Chinese +Linchuan China Chinese +Lhasa China Chinese +Lianyuan China Chinese +Liyang China Chinese +Liling China Chinese +Linhai China Chinese +Larisa Greece Greek +La Habana Cuba Spanish +Lilongwe Malawi Chichewa +León Mexico Spanish +La Paz Mexico Spanish +La Paz Mexico Spanish +Lázaro Cárdenas Mexico Spanish +Lagos de Moreno Mexico Spanish +Lerdo Mexico Spanish +Los Cabos Mexico Spanish +Lerma Mexico Spanish +Las Margaritas Mexico Spanish +Lashio (Lasho) Myanmar Burmese +Lalitapur Nepal Nepali +León Nicaragua Spanish +Lambaré Paraguay Spanish +Lima Peru Spanish +Lisboa Portugal Portuguese +Lódz Poland Polish +Lublin Poland Polish +Legnica Poland Polish +Lyon France French +Le Havre France French +Lille France French +Le Mans France French +Limoges France French +Linköping Sweden Swedish +Lund Sweden Swedish +Leipzig Germany German +Lübeck Germany German +Ludwigshafen am Rhein Germany German +Leverkusen Germany German +Lünen Germany German +Lahti Finland Finnish +Lausanne Switzerland German +Latakia Syria Arabic +Luchou Taiwan Min +Lungtan Taiwan Min +Liberec Czech Republic Czech +Lviv Ukraine Ukrainian +Lugansk Ukraine Ukrainian +Lutsk Ukraine Ukrainian +Lysyt?ansk Ukraine Ukrainian +Lower Hutt New Zealand English +Lida Belarus Belorussian +Los Teques Venezuela Spanish +Lipetsk Russian Federation Russian +Ljubertsy Russian Federation Russian +Leninsk-Kuznetski Russian Federation Russian +Long Xuyen Vietnam Vietnamese +Los Angeles United States English +Las Vegas United States English +Long Beach United States English +Lexington-Fayette United States English +Louisville United States English +Lincoln United States English +Lubbock United States English +Little Rock United States English +Laredo United States English +Lakewood United States English +Lansing United States English +Lancaster United States English +Lafayette United States English +Lowell United States English +Livonia United States English +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY Country ALL PRIMARY,Name NULL NULL NULL 239 Using where +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 8 Using where; Using join buffer +Name +Vientiane +Riga +Daugavpils +Maseru +Beirut +Tripoli +Monrovia +Tripoli +Bengasi +Misrata +Vilnius +Kaunas +Klaipeda +?iauliai +Panevezys +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 eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer +Name IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) +Afghanistan NULL +Netherlands NULL +Algeria NULL +Angola NULL +Australia 81.2 +Argentina NULL +Bangladesh NULL +Belgium NULL +United Kingdom 97.3 +Brazil NULL +Burkina Faso NULL +Chile NULL +South Africa 8.5 +Ecuador NULL +Egypt NULL +Spain NULL +Ethiopia NULL +Philippines NULL +Ghana NULL +Guatemala NULL +Indonesia NULL +India NULL +Iraq NULL +Iran NULL +Japan 0.1 +Italy NULL +Yemen NULL +Yugoslavia NULL +Cambodia NULL +Canada 60.4 +Cameroon NULL +Kazakstan NULL +Kenya NULL +China NULL +Colombia NULL +Congo, The Democratic Republic of the NULL +North Korea NULL +South Korea NULL +Greece NULL +Cuba NULL +Madagascar NULL +Malaysia 1.6 +Malawi NULL +Mali NULL +Morocco NULL +Mexico NULL +Mozambique NULL +Myanmar NULL +Nepal NULL +Niger NULL +Nigeria NULL +Côte d?Ivoire NULL +Pakistan NULL +Peru NULL +Poland NULL +France NULL +Romania NULL +Germany NULL +Saudi Arabia NULL +Somalia NULL +Sri Lanka NULL +Sudan NULL +Syria NULL +Taiwan NULL +Tanzania NULL +Thailand NULL +Czech Republic NULL +Turkey NULL +Uganda NULL +Ukraine NULL +Hungary NULL +Uzbekistan NULL +Belarus NULL +United States 86.2 +Venezuela NULL +Russian Federation NULL +Vietnam NULL +Zimbabwe 2.2 +Variable_name Value +join_buffer_size 131072 +Variable_name Value +join_cache_level 1 diff -Nrup a/mysql-test/r/join_nested_jcl6.result b/mysql-test/r/join_nested_jcl6.result --- /dev/null Wed Dec 31 16:00:00 196900 +++ b/mysql-test/r/join_nested_jcl6.result 2008-04-05 23:35:11 -07:00 @@ -0,0 +1,1756 @@ +set join_cache_level=6; +show variables like 'join_cache_level'; +Variable_name Value +join_cache_level 6 +DROP TABLE IF EXISTS t0,t1,t2,t3,t4,t5,t6,t7,t8,t9; +CREATE TABLE t0 (a int, b int, c int); +CREATE TABLE t1 (a int, b int, c int); +CREATE TABLE t2 (a int, b int, c int); +CREATE TABLE t3 (a int, b int, c int); +CREATE TABLE t4 (a int, b int, c int); +CREATE TABLE t5 (a int, b int, c int); +CREATE TABLE t6 (a int, b int, c int); +CREATE TABLE t7 (a int, b int, c int); +CREATE TABLE t8 (a int, b int, c int); +CREATE TABLE t9 (a int, b int, c int); +INSERT INTO t0 VALUES (1,1,0), (1,2,0), (2,2,0); +INSERT INTO t1 VALUES (1,3,0), (2,2,0), (3,2,0); +INSERT INTO t2 VALUES (3,3,0), (4,2,0), (5,3,0); +INSERT INTO t3 VALUES (1,2,0), (2,2,0); +INSERT INTO t4 VALUES (3,2,0), (4,2,0); +INSERT INTO t5 VALUES (3,1,0), (2,2,0), (3,3,0); +INSERT INTO t6 VALUES (3,2,0), (6,2,0), (6,1,0); +INSERT INTO t7 VALUES (1,1,0), (2,2,0); +INSERT INTO t8 VALUES (0,2,0), (1,2,0); +INSERT INTO t9 VALUES (1,1,0), (1,2,0), (3,3,0); +SELECT t2.a,t2.b +FROM t2; +a b +3 3 +4 2 +5 3 +SELECT t3.a,t3.b +FROM t3; +a b +1 2 +2 2 +SELECT t4.a,t4.b +FROM t4; +a b +3 2 +4 2 +SELECT t3.a,t3.b,t4.a,t4.b +FROM t3,t4; +a b a b +1 2 3 2 +2 2 3 2 +1 2 4 2 +2 2 4 2 +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t2.b=t4.b; +a b a b a b +4 2 1 2 3 2 +4 2 2 2 3 2 +4 2 1 2 4 2 +4 2 2 2 4 2 +3 3 NULL NULL NULL NULL +5 3 NULL NULL NULL NULL +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b; +a b a b a b +4 2 1 2 3 2 +4 2 1 2 4 2 +3 3 NULL NULL NULL NULL +5 3 NULL NULL NULL NULL +EXPLAIN EXTENDED +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t2.b=t4.b +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 +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +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`)) where ((`test`.`t3`.`a` = 1) or isnull(`test`.`t3`.`c`)) +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t2.b=t4.b +WHERE t3.a=1 OR t3.c IS NULL; +a b a b a b +4 2 1 2 3 2 +4 2 1 2 4 2 +3 3 NULL NULL NULL NULL +5 3 NULL NULL NULL NULL +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t2.b=t4.b +WHERE t3.a>1 OR t3.c IS NULL; +a b a b a b +4 2 2 2 3 2 +4 2 2 2 4 2 +3 3 NULL NULL NULL NULL +5 3 NULL NULL NULL NULL +SELECT t5.a,t5.b +FROM t5; +a b +3 1 +2 2 +3 3 +SELECT t3.a,t3.b,t4.a,t4.b,t5.a,t5.b +FROM t3,t4,t5; +a b a b a b +1 2 3 2 3 1 +2 2 3 2 3 1 +1 2 4 2 3 1 +2 2 4 2 3 1 +1 2 3 2 2 2 +2 2 3 2 2 2 +1 2 4 2 2 2 +2 2 4 2 2 2 +1 2 3 2 3 3 +2 2 3 2 3 3 +1 2 4 2 3 3 +2 2 4 2 3 3 +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b +FROM t2 +LEFT JOIN +(t3, t4, t5) +ON t2.b=t4.b; +a b a b a b a b +4 2 1 2 3 2 3 1 +4 2 2 2 3 2 3 1 +4 2 1 2 4 2 3 1 +4 2 2 2 4 2 3 1 +4 2 1 2 3 2 2 2 +4 2 2 2 3 2 2 2 +4 2 1 2 4 2 2 2 +4 2 2 2 4 2 2 2 +4 2 1 2 3 2 3 3 +4 2 2 2 3 2 3 3 +4 2 1 2 4 2 3 3 +4 2 2 2 4 2 3 3 +3 3 NULL NULL NULL NULL NULL NULL +5 3 NULL NULL NULL NULL NULL NULL +EXPLAIN EXTENDED +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b +FROM t2 +LEFT JOIN +(t3, t4, t5) +ON t2.b=t4.b +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 +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer +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`)) where ((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`)) +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b +FROM t2 +LEFT JOIN +(t3, t4, t5) +ON t2.b=t4.b +WHERE t3.a>1 OR t3.c IS NULL; +a b a b a b a b +4 2 2 2 3 2 3 1 +4 2 2 2 4 2 3 1 +4 2 2 2 3 2 2 2 +4 2 2 2 4 2 2 2 +4 2 2 2 3 2 3 3 +4 2 2 2 4 2 3 3 +3 3 NULL NULL NULL NULL NULL NULL +5 3 NULL NULL NULL NULL NULL NULL +EXPLAIN EXTENDED +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b +FROM t2 +LEFT JOIN +(t3, t4, t5) +ON t2.b=t4.b +WHERE (t3.a>1 OR t3.c IS NULL) AND +(t5.a<3 OR t5.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 +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +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`)) where (((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`)) and ((`test`.`t5`.`a` < 3) or isnull(`test`.`t5`.`c`))) +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b +FROM t2 +LEFT JOIN +(t3, t4, t5) +ON t2.b=t4.b +WHERE (t3.a>1 OR t3.c IS NULL) AND +(t5.a<3 OR t5.c IS NULL); +a b a b a b a b +4 2 2 2 3 2 2 2 +4 2 2 2 4 2 2 2 +3 3 NULL NULL NULL NULL NULL NULL +5 3 NULL NULL NULL NULL NULL NULL +SELECT t6.a,t6.b +FROM t6; +a b +3 2 +6 2 +6 1 +SELECT t7.a,t7.b +FROM t7; +a b +1 1 +2 2 +SELECT t6.a,t6.b,t7.a,t7.b +FROM t6,t7; +a b a b +3 2 1 1 +3 2 2 2 +6 2 1 1 +6 2 2 2 +6 1 1 1 +6 1 2 2 +SELECT t8.a,t8.b +FROM t8; +a b +0 2 +1 2 +EXPLAIN EXTENDED +SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM (t6, t7) +LEFT JOIN +t8 +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 +1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +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`.`t7`.`b` = `test`.`t8`.`b`) and (`test`.`t6`.`b` < 10))) where 1 +SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM (t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10; +a b a b a b +3 2 2 2 0 2 +6 2 2 2 0 2 +6 1 2 2 0 2 +3 2 2 2 1 2 +6 2 2 2 1 2 +6 1 2 2 1 2 +3 2 1 1 NULL NULL +6 2 1 1 NULL NULL +6 1 1 1 NULL NULL +SELECT t5.a,t5.b +FROM t5; +a b +3 1 +2 2 +3 3 +SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b; +a b a b a b a b +2 2 3 2 2 2 0 2 +2 2 6 2 2 2 0 2 +2 2 3 2 2 2 1 2 +2 2 6 2 2 2 1 2 +3 1 3 2 1 1 NULL NULL +3 1 6 2 1 1 NULL NULL +3 3 NULL NULL NULL NULL NULL NULL +SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b AND +(t8.a < 1 OR t8.c IS NULL); +a b a b a b a b +2 2 3 2 2 2 0 2 +2 2 6 2 2 2 0 2 +3 1 3 2 1 1 NULL NULL +3 1 6 2 1 1 NULL NULL +3 3 NULL NULL NULL NULL NULL NULL +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b; +a b a b a b +4 2 1 2 3 2 +4 2 1 2 4 2 +3 3 NULL NULL NULL NULL +5 3 NULL NULL NULL NULL +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b; +a b a b a b a b a b a b a b +4 2 1 2 3 2 2 2 3 2 2 2 0 2 +4 2 1 2 4 2 2 2 3 2 2 2 0 2 +4 2 1 2 3 2 2 2 6 2 2 2 0 2 +4 2 1 2 4 2 2 2 6 2 2 2 0 2 +4 2 1 2 3 2 2 2 3 2 2 2 1 2 +4 2 1 2 4 2 2 2 3 2 2 2 1 2 +4 2 1 2 3 2 2 2 6 2 2 2 1 2 +4 2 1 2 4 2 2 2 6 2 2 2 1 2 +4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL +4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL +4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +WHERE t2.a > 3 AND +(t6.a < 6 OR t6.c IS NULL); +a b a b a b a b a b a b a b +4 2 1 2 3 2 2 2 3 2 2 2 0 2 +4 2 1 2 4 2 2 2 3 2 2 2 0 2 +4 2 1 2 3 2 2 2 3 2 2 2 1 2 +4 2 1 2 4 2 2 2 3 2 2 2 1 2 +4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +SELECT t1.a,t1.b +FROM t1; +a b +1 3 +2 2 +3 2 +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2); +a b a b a b a b a b a b a b a b +3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2 +3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2 +3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 +3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 +3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2 +3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2 +3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2 +3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2 +1 3 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +1 3 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +1 3 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL +3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL +1 3 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL +3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL +1 3 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +1 3 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +1 3 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +3 2 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +1 3 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +3 2 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +1 3 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +3 2 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +1 3 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +3 2 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +1 3 3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +3 2 3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +1 3 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +1 3 3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +3 2 3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +1 3 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +1 3 3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +3 2 3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +1 3 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2) +WHERE (t2.a >= 4 OR t2.c IS NULL); +a b a b a b a b a b a b a b a b +3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2 +3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2 +3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 +3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 +3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2 +3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2 +3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2 +3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2 +1 3 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +1 3 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +1 3 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL +3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL +1 3 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL +3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL +1 3 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +1 3 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +1 3 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +1 3 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +1 3 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL +SELECT t0.a,t0.b +FROM t0; +a b +1 1 +1 2 +2 2 +EXPLAIN EXTENDED +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2) +WHERE t0.a=1 AND +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 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) 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, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2) +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL); +a b a b a b a b a b a b a b a b a b +1 2 3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2 +1 2 3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2 +1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 +1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 +1 2 3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2 +1 2 3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2 +1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2 +1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2 +1 2 3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +1 2 3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL +1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL +1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +1 2 3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +1 2 3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL +EXPLAIN EXTENDED +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2), +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) 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 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) 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`))) +SELECT t9.a,t9.b +FROM t9; +a b +1 1 +1 2 +3 3 +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2), +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) AND +(t9.a=1); +a b a b a b a b a b a b a b a b a b a b +1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 1 2 +1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 1 2 +1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 1 +1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 1 +1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 2 +1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 2 +1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 1 +1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 1 +1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 2 +1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 1 +1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 1 +1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 2 +1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1 +1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 2 +SELECT t1.a,t1.b +FROM t1; +a b +1 3 +2 2 +3 2 +SELECT t2.a,t2.b +FROM t2; +a b +3 3 +4 2 +5 3 +SELECT t3.a,t3.b +FROM t3; +a b +1 2 +2 2 +SELECT t2.a,t2.b,t3.a,t3.b +FROM t2 +LEFT JOIN +t3 +ON t2.b=t3.b; +a b a b +4 2 1 2 +4 2 2 2 +3 3 NULL NULL +5 3 NULL NULL +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b +FROM t1, t2 +LEFT JOIN +t3 +ON t2.b=t3.b +WHERE t1.a <= 2; +a b a b a b +1 3 4 2 1 2 +2 2 4 2 1 2 +1 3 4 2 2 2 +2 2 4 2 2 2 +1 3 3 3 NULL NULL +2 2 3 3 NULL NULL +1 3 5 3 NULL NULL +2 2 5 3 NULL NULL +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b +FROM t1, t3 +RIGHT JOIN +t2 +ON t2.b=t3.b +WHERE t1.a <= 2; +a b a b a b +1 3 4 2 1 2 +2 2 4 2 1 2 +1 3 4 2 2 2 +2 2 4 2 2 2 +1 3 3 3 NULL NULL +2 2 3 3 NULL NULL +1 3 5 3 NULL NULL +2 2 5 3 NULL NULL +SELECT t3.a,t3.b,t4.a,t4.b +FROM t3,t4; +a b a b +1 2 3 2 +2 2 3 2 +1 2 4 2 +2 2 4 2 +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b; +a b a b a b +4 2 1 2 3 2 +4 2 1 2 4 2 +3 3 NULL NULL NULL NULL +5 3 NULL NULL NULL NULL +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t1, t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b +WHERE t1.a <= 2; +a b a b a b a b +1 3 4 2 1 2 3 2 +2 2 4 2 1 2 3 2 +1 3 4 2 1 2 4 2 +2 2 4 2 1 2 4 2 +1 3 3 3 NULL NULL NULL NULL +2 2 3 3 NULL NULL NULL NULL +1 3 5 3 NULL NULL NULL NULL +2 2 5 3 NULL NULL NULL NULL +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t1, (t3, t4) +RIGHT JOIN +t2 +ON t3.a=1 AND t2.b=t4.b +WHERE t1.a <= 2; +a b a b a b a b +1 3 4 2 1 2 3 2 +2 2 4 2 1 2 3 2 +1 3 4 2 1 2 4 2 +2 2 4 2 1 2 4 2 +1 3 3 3 NULL NULL NULL NULL +2 2 3 3 NULL NULL NULL NULL +1 3 5 3 NULL NULL NULL NULL +2 2 5 3 NULL NULL NULL NULL +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t1, (t3, t4) +RIGHT JOIN +t2 +ON t3.a=1 AND t2.b=t4.b +WHERE t1.a <= 2; +a b a b a b a b +1 3 4 2 1 2 3 2 +2 2 4 2 1 2 3 2 +1 3 4 2 1 2 4 2 +2 2 4 2 1 2 4 2 +1 3 3 3 NULL NULL NULL NULL +2 2 3 3 NULL NULL NULL NULL +1 3 5 3 NULL NULL NULL NULL +2 2 5 3 NULL NULL NULL NULL +EXPLAIN EXTENDED +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t1, (t3, t4) +RIGHT JOIN +t2 +ON t3.a=1 AND t2.b=t4.b +WHERE t1.a <= 2; +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 +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) where (`test`.`t1`.`a` <= 2) +CREATE INDEX idx_b ON t2(b); +EXPLAIN EXTENDED +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM (t3,t4) +LEFT JOIN +(t1,t2) +ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b; +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 +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer +1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using join buffer +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`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(((`test`.`t3`.`a` = 1) and (`test`.`t3`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` = `test`.`t4`.`b`))) where 1 +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM (t3,t4) +LEFT JOIN +(t1,t2) +ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b; +a b a b a b +4 2 1 2 3 2 +4 2 1 2 4 2 +4 2 1 2 3 2 +4 2 1 2 4 2 +4 2 1 2 3 2 +4 2 1 2 4 2 +NULL NULL 2 2 3 2 +NULL NULL 2 2 4 2 +EXPLAIN EXTENDED +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2), +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) 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 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) 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`))) +CREATE INDEX idx_b ON t4(b); +CREATE INDEX idx_b ON t5(b); +EXPLAIN EXTENDED +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2), +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) 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 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer +1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) 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`))) +CREATE INDEX idx_b ON t8(b); +EXPLAIN EXTENDED +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2), +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) 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 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer +1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) 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`))) +CREATE INDEX idx_b ON t1(b); +CREATE INDEX idx_a ON t0(a); +EXPLAIN EXTENDED +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2), +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) AND +(t9.a=1); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t0 ref idx_a idx_a 5 const 1 100.00 +1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 2 100.00 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer +1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) 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`))) +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2), +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) AND +(t9.a=1); +a b a b a b a b a b a b a b a b a b a b +1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 1 2 +1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 1 2 +1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 1 +1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 1 +1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 2 +1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 2 +1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 1 +1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 1 +1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 2 +1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 1 +1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 1 +1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 2 +1 2 2 2 NULL NULL 1 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1 +1 2 2 2 NULL NULL 1 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 2 +1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1 +1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 2 +SELECT t2.a,t2.b +FROM t2; +a b +3 3 +4 2 +5 3 +SELECT t3.a,t3.b +FROM t3; +a b +1 2 +2 2 +SELECT t2.a,t2.b,t3.a,t3.b +FROM t2 LEFT JOIN t3 ON t2.b=t3.b +WHERE t2.a = 4 OR (t2.a > 4 AND t3.a IS NULL); +a b a b +4 2 1 2 +4 2 2 2 +5 3 NULL NULL +SELECT t2.a,t2.b,t3.a,t3.b +FROM t2 LEFT JOIN (t3) ON t2.b=t3.b +WHERE t2.a = 4 OR (t2.a > 4 AND t3.a IS NULL); +a b a b +4 2 1 2 +4 2 2 2 +5 3 NULL NULL +ALTER TABLE t3 +CHANGE COLUMN a a1 int, +CHANGE COLUMN c c1 int; +SELECT t2.a,t2.b,t3.a1,t3.b +FROM t2 LEFT JOIN t3 ON t2.b=t3.b +WHERE t2.a = 4 OR (t2.a > 4 AND t3.a1 IS NULL); +a b a1 b +4 2 1 2 +4 2 2 2 +5 3 NULL NULL +SELECT t2.a,t2.b,t3.a1,t3.b +FROM t2 NATURAL LEFT JOIN t3 +WHERE t2.a = 4 OR (t2.a > 4 AND t3.a1 IS NULL); +a b a1 b +4 2 1 2 +4 2 2 2 +5 3 NULL NULL +DROP TABLE t0,t1,t2,t3,t4,t5,t6,t7,t8,t9; +CREATE TABLE t1 (a int); +CREATE TABLE t2 (a int); +CREATE TABLE t3 (a int); +INSERT INTO t1 VALUES (1); +INSERT INTO t2 VALUES (2); +INSERT INTO t3 VALUES (2); +INSERT INTO t1 VALUES (2); +SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t2.a=t3.a) ON t1.a=t3.a; +a a a +2 2 2 +1 NULL NULL +SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON t2.a=t3.a ON t1.a=t3.a; +a a a +2 2 2 +1 NULL NULL +DELETE FROM t1 WHERE a=2; +SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON t2.a=t3.a ON t1.a=t3.a; +a a a +1 NULL NULL +DELETE FROM t2; +SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON t2.a=t3.a ON t1.a=t3.a; +a a a +1 NULL NULL +DROP TABLE t1,t2,t3; +CREATE TABLE t1(a int, key (a)); +CREATE TABLE t2(b int, key (b)); +CREATE TABLE t3(c int, key (c)); +INSERT INTO t1 VALUES (NULL), (0), (1), (2), (3), (4), (5), (6), (7), (8), (9), +(10), (11), (12), (13), (14), (15), (16), (17), (18), (19); +INSERT INTO t2 VALUES (NULL), (0), (1), (2), (3), (4), (5), (6), (7), (8), (9), +(10), (11), (12), (13), (14), (15), (16), (17), (18), (19); +INSERT INTO t3 VALUES (0), (1), (2), (3), (4), (5); +EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON c < 3 and b = c; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index NULL a 5 NULL 21 Using index +1 SIMPLE t3 index c c 5 NULL 6 Using where; Using index +1 SIMPLE t2 ref b b 5 test.t3.c 2 Using index +EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index NULL a 5 NULL 21 Using index +1 SIMPLE t3 index c c 5 NULL 6 Using index +1 SIMPLE t2 ref b b 5 test.t3.c 2 Using where; Using index +SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; +a b c +NULL 0 0 +NULL 1 1 +NULL 2 2 +0 0 0 +0 1 1 +0 2 2 +1 0 0 +1 1 1 +1 2 2 +2 0 0 +2 1 1 +2 2 2 +3 0 0 +3 1 1 +3 2 2 +4 0 0 +4 1 1 +4 2 2 +5 0 0 +5 1 1 +5 2 2 +6 0 0 +6 1 1 +6 2 2 +7 0 0 +7 1 1 +7 2 2 +8 0 0 +8 1 1 +8 2 2 +9 0 0 +9 1 1 +9 2 2 +10 0 0 +10 1 1 +10 2 2 +11 0 0 +11 1 1 +11 2 2 +12 0 0 +12 1 1 +12 2 2 +13 0 0 +13 1 1 +13 2 2 +14 0 0 +14 1 1 +14 2 2 +15 0 0 +15 1 1 +15 2 2 +16 0 0 +16 1 1 +16 2 2 +17 0 0 +17 1 1 +17 2 2 +18 0 0 +18 1 1 +18 2 2 +19 0 0 +19 1 1 +19 2 2 +DELETE FROM t3; +EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index NULL a 5 NULL 21 Using index +1 SIMPLE t3 index c c 5 NULL 0 Using index +1 SIMPLE t2 ref b b 5 test.t3.c 2 Using where; Using index +SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; +a b c +NULL NULL NULL +0 NULL NULL +1 NULL NULL +2 NULL NULL +3 NULL NULL +4 NULL NULL +5 NULL NULL +6 NULL NULL +7 NULL NULL +8 NULL NULL +9 NULL NULL +10 NULL NULL +11 NULL NULL +12 NULL NULL +13 NULL NULL +14 NULL NULL +15 NULL NULL +16 NULL NULL +17 NULL NULL +18 NULL NULL +19 NULL NULL +DROP TABLE t1,t2,t3; +CREATE TABLE t1 (c11 int); +CREATE TABLE t2 (c21 int); +CREATE TABLE t3 (c31 int); +INSERT INTO t1 VALUES (4), (5); +SELECT * FROM t1 LEFT JOIN t2 ON c11=c21; +c11 c21 +4 NULL +5 NULL +EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON c11=c21; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 system NULL NULL NULL NULL 0 const row not found +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21; +c11 c21 c31 +4 NULL NULL +5 NULL NULL +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 ALL NULL NULL NULL NULL 0 Using where; Using join buffer +1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer +DROP TABLE t1,t2,t3; +CREATE TABLE t1 (goods int(12) NOT NULL, price varchar(128) NOT NULL); +INSERT INTO t1 VALUES (23, 2340), (26, 9900); +CREATE TABLE t2 (goods int(12), name varchar(50), shop char(2)); +INSERT INTO t2 VALUES (23, 'as300', 'fr'), (26, 'as600', 'fr'); +create table t3 (groupid int(12) NOT NULL, goodsid int(12) NOT NULL); +INSERT INTO t3 VALUES (3,23), (6,26); +CREATE TABLE t4 (groupid int(12)); +INSERT INTO t4 VALUES (1), (2), (3), (4), (5), (6); +SELECT * FROM +(SELECT DISTINCT gl.groupid, gp.price +FROM t4 gl +LEFT JOIN +(t3 g INNER JOIN t2 p ON g.goodsid = p.goods +INNER JOIN t1 gp ON p.goods = gp.goods) +ON gl.groupid = g.groupid and p.shop = 'fr') t; +groupid price +3 2340 +6 9900 +1 NULL +2 NULL +4 NULL +5 NULL +CREATE VIEW v1 AS +SELECT g.groupid groupid, p.goods goods, +p.name name, p.shop shop, +gp.price price +FROM t3 g INNER JOIN t2 p ON g.goodsid = p.goods +INNER JOIN t1 gp on p.goods = gp.goods; +CREATE VIEW v2 AS +SELECT DISTINCT g.groupid, fr.price +FROM t4 g +LEFT JOIN +v1 fr on g.groupid = fr.groupid and fr.shop = 'fr'; +SELECT * FROM v2; +groupid price +3 2340 +6 9900 +1 NULL +2 NULL +4 NULL +5 NULL +SELECT * FROM +(SELECT DISTINCT g.groupid, fr.price +FROM t4 g +LEFT JOIN +v1 fr on g.groupid = fr.groupid and fr.shop = 'fr') t; +groupid price +3 2340 +6 9900 +1 NULL +2 NULL +4 NULL +5 NULL +DROP VIEW v1,v2; +DROP TABLE t1,t2,t3,t4; +CREATE TABLE t1(a int); +CREATE TABLE t2(b int); +CREATE TABLE t3(c int, d int); +CREATE TABLE t4(d int); +CREATE TABLE t5(e int, f int); +CREATE TABLE t6(f int); +CREATE VIEW v1 AS +SELECT e FROM t5 JOIN t6 ON t5.e=t6.f; +CREATE VIEW v2 AS +SELECT e FROM t5 NATURAL JOIN t6; +SELECT t1.a FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c JOIN t4 USING(d); +a +SELECT t1.x FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c JOIN t4 USING(d); +ERROR 42S22: Unknown column 't1.x' in 'field list' +SELECT t1.a FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c NATURAL JOIN t4; +a +SELECT t1.x FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c NATURAL JOIN t4; +ERROR 42S22: Unknown column 't1.x' in 'field list' +SELECT v1.e FROM v1 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d); +e +SELECT v1.x FROM v1 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d); +ERROR 42S22: Unknown column 'v1.x' in 'field list' +SELECT v2.e FROM v2 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d); +e +SELECT v2.x FROM v2 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d); +ERROR 42S22: Unknown column 'v2.x' in 'field list' +DROP VIEW v1, v2; +DROP TABLE t1, t2, t3, t4, t5, t6; +create table t1 (id1 int(11) not null); +insert into t1 values (1),(2); +create table t2 (id2 int(11) not null); +insert into t2 values (1),(2),(3),(4); +create table t3 (id3 char(16) not null); +insert into t3 values ('100'); +create table t4 (id2 int(11) not null, id3 char(16)); +create table t5 (id1 int(11) not null, key (id1)); +insert into t5 values (1),(2),(1); +create view v1 as +select t4.id3 from t4 join t2 on t4.id2 = t2.id2; +select t1.id1 from t1 inner join (t3 left join v1 on t3.id3 = v1.id3); +id1 +1 +2 +drop view v1; +drop table t1, t2, t3, t4, t5; +create table t0 (a int); +insert into t0 values (0),(1),(2),(3); +create table t1(a int); +insert into t1 select A.a + 10*(B.a) from t0 A, t0 B; +create table t2 (a int, b int); +insert into t2 values (1,1), (2,2), (3,3); +create table t3(a int, b int, filler char(200), key(a)); +insert into t3 select a,a,'filler' from t1; +insert into t3 select a,a,'filler' from t1; +create table t4 like t3; +insert into t4 select * from t3; +insert into t4 select * from t3; +create table t5 like t4; +insert into t5 select * from t4; +insert into t5 select * from t4; +create table t6 like t5; +insert into t6 select * from t5; +insert into t6 select * from t5; +create table t7 like t6; +insert into t7 select * from t6; +insert into t7 select * from t6; +explain select * from t4 join +t2 left join (t3 join t5 on t5.a=t3.b) on t3.a=t2.b where t4.a<=>t3.b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL X +1 SIMPLE t3 ref a a 5 test.t2.b X Using join buffer +1 SIMPLE t5 ref a a 5 test.t3.b X Using join buffer +1 SIMPLE t4 ref a a 5 test.t3.b X Using where; Using join buffer +explain select * from (t4 join t6 on t6.a=t4.b) right join t3 on t4.a=t3.b +join t2 left join (t5 join t7 on t7.a=t5.b) on t5.a=t2.b where t3.a<=>t2.b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL X +1 SIMPLE t3 ref a a 5 test.t2.b X Using where; Using join buffer +1 SIMPLE t4 ref a a 5 test.t3.b X Using join buffer +1 SIMPLE t6 ref a a 5 test.t4.b X Using join buffer +1 SIMPLE t5 ref a a 5 test.t2.b X Using join buffer +1 SIMPLE t7 ref a a 5 test.t5.b X Using join buffer +explain select * from t2 left join +(t3 left join (t4 join t6 on t6.a=t4.b) on t4.a=t3.b +join t5 on t5.a=t3.b) on t3.a=t2.b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL X +1 SIMPLE t3 ref a a 5 test.t2.b X Using join buffer +1 SIMPLE t4 ref a a 5 test.t3.b X Using join buffer +1 SIMPLE t6 ref a a 5 test.t4.b X Using join buffer +1 SIMPLE t5 ref a a 5 test.t3.b X Using join buffer +drop table t0, t1, t2, t3, t4, t5, t6, t7; +create table t1 (a int); +insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); +create table t2 (a int, filler char(100), key(a)); +insert into t2 select A.a + 10*B.a, '' from t1 A, t1 B; +create table t3 like t2; +insert into t3 select * from t2; +explain select * from t1 left join +(t2 left join t3 on (t2.a = t3.a)) +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 10 +1 SIMPLE t2 ref a a 5 test.t1.a 1 Using join buffer +1 SIMPLE t3 ref a a 5 test.t2.a 1 Using join buffer +drop table t1, t2, t3; +CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, type varchar(10)); +CREATE TABLE t2 (pid int NOT NULL PRIMARY KEY, type varchar(10)); +CREATE TABLE t3 (cid int NOT NULL PRIMARY KEY, +id int NOT NULL, +pid int NOT NULL); +INSERT INTO t1 VALUES (1, 'A'), (3, 'C'); +INSERT INTO t2 VALUES (1, 'A'), (3, 'C'); +INSERT INTO t3 VALUES (1, 1, 1), (3, 3, 3); +SELECT * FROM t1 p LEFT JOIN (t3 JOIN t1) +ON (t1.id=t3.id AND t1.type='B' AND p.id=t3.id) +LEFT JOIN t2 ON (t3.pid=t2.pid) +WHERE p.id=1; +id type cid id pid id type pid type +1 A NULL NULL NULL NULL NULL NULL NULL +CREATE VIEW v1 AS +SELECT t3.* FROM t3 JOIN t1 ON t1.id=t3.id AND t1.type='B'; +SELECT * FROM t1 p LEFT JOIN v1 ON p.id=v1.id +LEFT JOIN t2 ON v1.pid=t2.pid +WHERE p.id=1; +id type cid id pid pid type +1 A NULL NULL NULL NULL NULL +DROP VIEW v1; +DROP TABLE t1,t2,t3; +CREATE TABLE t1 (id1 int PRIMARY KEY, id2 int); +CREATE TABLE t2 (id1 int PRIMARY KEY, id2 int); +CREATE TABLE t3 (id1 int PRIMARY KEY, id2 int); +CREATE TABLE t4 (id1 int PRIMARY KEY, id2 int); +CREATE TABLE t5 (id1 int PRIMARY KEY, id2 int); +SELECT t1.id1 AS id, t5.id1 AS ngroupbynsa +FROM t1 INNER JOIN t2 ON t2.id2 = t1.id1 +LEFT OUTER JOIN +(t3 INNER JOIN t4 ON t4.id1 = t3.id2 INNER JOIN t5 ON t4.id2 = t5.id1) +ON t3.id2 IS NOT NULL +WHERE t1.id1=2; +id ngroupbynsa +PREPARE stmt FROM +"SELECT t1.id1 AS id, t5.id1 AS ngroupbynsa + FROM t1 INNER JOIN t2 ON t2.id2 = t1.id1 + LEFT OUTER JOIN + (t3 INNER JOIN t4 ON t4.id1 = t3.id2 INNER JOIN t5 ON t4.id2 = t5.id1) + ON t3.id2 IS NOT NULL + WHERE t1.id1=2"; +EXECUTE stmt; +id ngroupbynsa +EXECUTE stmt; +id ngroupbynsa +EXECUTE stmt; +id ngroupbynsa +EXECUTE stmt; +id ngroupbynsa +INSERT INTO t1 VALUES (1,1), (2,1), (3,2); +INSERT INTO t2 VALUES (2,1), (3,2), (4,3); +INSERT INTO t3 VALUES (1,1), (3,2), (2,NULL); +INSERT INTO t4 VALUES (1,1), (2,1), (3,3); +INSERT INTO t5 VALUES (1,1), (2,2), (3,3), (4,3); +EXECUTE stmt; +id ngroupbynsa +2 1 +2 1 +EXECUTE stmt; +id ngroupbynsa +2 1 +2 1 +EXECUTE stmt; +id ngroupbynsa +2 1 +2 1 +EXECUTE stmt; +id ngroupbynsa +2 1 +2 1 +SELECT t1.id1 AS id, t5.id1 AS ngroupbynsa +FROM t1 INNER JOIN t2 ON t2.id2 = t1.id1 +LEFT OUTER JOIN +(t3 INNER JOIN t4 ON t4.id1 = t3.id2 INNER JOIN t5 ON t4.id2 = t5.id1) +ON t3.id2 IS NOT NULL +WHERE t1.id1=2; +id ngroupbynsa +2 1 +2 1 +DROP TABLE t1,t2,t3,t4,t5; +CREATE TABLE t1 ( +id int NOT NULL PRIMARY KEY, +ct int DEFAULT NULL, +pc int DEFAULT NULL, +INDEX idx_ct (ct), +INDEX idx_pc (pc) +); +INSERT INTO t1 VALUES +(1,NULL,NULL),(2,NULL,NULL),(3,NULL,NULL),(4,NULL,NULL),(5,NULL,NULL); +CREATE TABLE t2 ( +id int NOT NULL PRIMARY KEY, +sr int NOT NULL, +nm varchar(255) NOT NULL, +INDEX idx_sr (sr) +); +INSERT INTO t2 VALUES +(2441905,4308,'LesAbymes'),(2441906,4308,'Anse-Bertrand'); +CREATE TABLE t3 ( +id int NOT NULL PRIMARY KEY, +ct int NOT NULL, +ln int NOT NULL, +INDEX idx_ct (ct), +INDEX idx_ln (ln) +); +CREATE TABLE t4 ( +id int NOT NULL PRIMARY KEY, +nm varchar(255) NOT NULL +); +INSERT INTO t4 VALUES (4308,'Guadeloupe'),(4309,'Martinique'); +SELECT t1.* +FROM t1 LEFT JOIN +(t2 LEFT JOIN t3 ON t3.ct=t2.id AND t3.ln='5') ON t1.ct=t2.id +WHERE t1.id='5'; +id ct pc +5 NULL NULL +SELECT t1.*, t4.nm +FROM t1 LEFT JOIN +(t2 LEFT JOIN t3 ON t3.ct=t2.id AND t3.ln='5') ON t1.ct=t2.id +LEFT JOIN t4 ON t2.sr=t4.id +WHERE t1.id='5'; +id ct pc nm +5 NULL NULL NULL +DROP TABLE t1,t2,t3,t4; +CREATE TABLE t1 (a INT, b INT); +CREATE TABLE t2 (a INT); +CREATE TABLE t3 (a INT, c INT); +CREATE TABLE t4 (a INT, c INT); +CREATE TABLE t5 (a INT, c INT); +SELECT b FROM t1 JOIN (t2 LEFT JOIN t3 USING (a) LEFT JOIN t4 USING (a) +LEFT JOIN t5 USING (a)) USING (a); +b +SELECT c FROM t1 JOIN (t2 LEFT JOIN t3 USING (a) LEFT JOIN t4 USING (a) +LEFT JOIN t5 USING (a)) USING (a); +ERROR 23000: Column 'c' in field list is ambiguous +SELECT b FROM t1 JOIN (t2 JOIN t3 USING (a) JOIN t4 USING (a) +JOIN t5 USING (a)) USING (a); +b +SELECT c FROM t1 JOIN (t2 JOIN t3 USING (a) JOIN t4 USING (a) +JOIN t5 USING (a)) USING (a); +ERROR 23000: Column 'c' in field list is ambiguous +DROP TABLE t1,t2,t3,t4,t5; +CREATE TABLE t1 (a INT, b INT); +CREATE TABLE t2 (a INT, b INT); +CREATE TABLE t3 (a INT, b INT); +INSERT INTO t1 VALUES (1,1); +INSERT INTO t2 VALUES (1,1); +INSERT INTO t3 VALUES (1,1); +SELECT * FROM t1 JOIN (t2 JOIN t3 USING (b)) USING (a); +ERROR 23000: Column 'a' in from clause is ambiguous +DROP TABLE t1,t2,t3; +CREATE TABLE t1 ( +carrier char(2) default NULL, +id int NOT NULL auto_increment PRIMARY KEY +); +INSERT INTO t1 VALUES +('CO',235371754),('CO',235376554),('CO',235376884),('CO',235377874), +('CO',231060394),('CO',231059224),('CO',231059314),('CO',231060484), +('CO',231060274),('CO',231060124),('CO',231060244),('CO',231058594), +('CO',231058924),('CO',231058504),('CO',231059344),('CO',231060424), +('CO',231059554),('CO',231060304),('CO',231059644),('CO',231059464), +('CO',231059764),('CO',231058294),('CO',231058624),('CO',231058864), +('CO',231059374),('CO',231059584),('CO',231059734),('CO',231059014), +('CO',231059854),('CO',231059494),('CO',231059794),('CO',231058534), +('CO',231058324),('CO',231058684),('CO',231059524),('CO',231059974); +CREATE TABLE t2 ( +scan_date date default NULL, +package_id int default NULL, +INDEX scan_date(scan_date), +INDEX package_id(package_id) +); +INSERT INTO t2 VALUES +('2008-12-29',231062944),('2008-12-29',231065764),('2008-12-29',231066124), +('2008-12-29',231060094),('2008-12-29',231061054),('2008-12-29',231065644), +('2008-12-29',231064384),('2008-12-29',231064444),('2008-12-29',231073774), +('2008-12-29',231058594),('2008-12-29',231059374),('2008-12-29',231066004), +('2008-12-29',231068494),('2008-12-29',231070174),('2008-12-29',231071884), +('2008-12-29',231063274),('2008-12-29',231063754),('2008-12-29',231064144), +('2008-12-29',231069424),('2008-12-29',231073714),('2008-12-29',231058414), +('2008-12-29',231060994),('2008-12-29',231069154),('2008-12-29',231068614), +('2008-12-29',231071464),('2008-12-29',231074014),('2008-12-29',231059614), +('2008-12-29',231059074),('2008-12-29',231059464),('2008-12-29',231069094), +('2008-12-29',231067294),('2008-12-29',231070144),('2008-12-29',231073804), +('2008-12-29',231072634),('2008-12-29',231058294),('2008-12-29',231065344), +('2008-12-29',231066094),('2008-12-29',231069034),('2008-12-29',231058594), +('2008-12-29',231059854),('2008-12-29',231059884),('2008-12-29',231059914), +('2008-12-29',231063664),('2008-12-29',231063814),('2008-12-29',231063904); +CREATE TABLE t3 ( +package_id int default NULL, +INDEX package_id(package_id) +); +INSERT INTO t3 VALUES +(231058294),(231058324),(231058354),(231058384),(231058414),(231058444), +(231058474),(231058504),(231058534),(231058564),(231058594),(231058624), +(231058684),(231058744),(231058804),(231058864),(231058924),(231058954), +(231059014),(231059074),(231059104),(231059134),(231059164),(231059194), +(231059224),(231059254),(231059284),(231059314),(231059344),(231059374), +(231059404),(231059434),(231059464),(231059494),(231059524),(231059554), +(231059584),(231059614),(231059644),(231059674),(231059704),(231059734), +(231059764),(231059794),(231059824),(231059854),(231059884),(231059914), +(231059944),(231059974),(231060004),(231060034),(231060064),(231060094), +(231060124),(231060154),(231060184),(231060214),(231060244),(231060274), +(231060304),(231060334),(231060364),(231060394),(231060424),(231060454), +(231060484),(231060514),(231060544),(231060574),(231060604),(231060634), +(231060664),(231060694),(231060724),(231060754),(231060784),(231060814), +(231060844),(231060874),(231060904),(231060934),(231060964),(231060994), +(231061024),(231061054),(231061084),(231061144),(231061174),(231061204), +(231061234),(231061294),(231061354),(231061384),(231061414),(231061474), +(231061564),(231061594),(231061624),(231061684),(231061714),(231061774), +(231061804),(231061894),(231061984),(231062074),(231062134),(231062224), +(231062254),(231062314),(231062374),(231062434),(231062494),(231062554), +(231062584),(231062614),(231062644),(231062704),(231062734),(231062794), +(231062854),(231062884),(231062944),(231063004),(231063034),(231063064), +(231063124),(231063154),(231063184),(231063214),(231063274),(231063334), +(231063394),(231063424),(231063454),(231063514),(231063574),(231063664); +CREATE TABLE t4 ( +carrier char(2) NOT NULL default '' PRIMARY KEY, +id int(11) default NULL, +INDEX id(id) +); +INSERT INTO t4 VALUES +('99',6),('SK',456),('UA',486),('AI',1081),('OS',1111),('VS',1510); +CREATE TABLE t5 ( +carrier_id int default NULL, +INDEX carrier_id(carrier_id) +); +INSERT INTO t5 VALUES +(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6), +(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6), +(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6), +(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6), +(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6), +(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(456),(456),(456), +(456),(456),(456),(456),(456),(456),(456),(456),(456),(456),(456),(456), +(456),(486),(1081),(1111),(1111),(1111),(1111),(1510); +SELECT COUNT(*) +FROM((t2 JOIN t1 ON t2.package_id = t1.id) +JOIN t3 ON t3.package_id = t1.id); +COUNT(*) +6 +EXPLAIN +SELECT COUNT(*) +FROM ((t2 JOIN t1 ON t2.package_id = t1.id) +JOIN t3 ON t3.package_id = t1.id) +LEFT JOIN +(t5 JOIN t4 ON t5.carrier_id = t4.id) +ON t4.carrier = t1.carrier; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 index package_id package_id 5 NULL 45 Using index +1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.package_id 1 Using join buffer +1 SIMPLE t4 eq_ref PRIMARY,id PRIMARY 2 test.t1.carrier 1 +1 SIMPLE t5 ref carrier_id carrier_id 5 test.t4.id 22 Using index +1 SIMPLE t3 ref package_id package_id 5 test.t1.id 1 Using where; Using index +SELECT COUNT(*) +FROM ((t2 JOIN t1 ON t2.package_id = t1.id) +JOIN t3 ON t3.package_id = t1.id) +LEFT JOIN +(t5 JOIN t4 ON t5.carrier_id = t4.id) +ON t4.carrier = t1.carrier; +COUNT(*) +6 +DROP TABLE t1,t2,t3,t4,t5; +End of 5.0 tests +set join_cache_level=default; +show variables like 'join_cache_level'; +Variable_name Value +join_cache_level 1 diff -Nrup a/mysql-test/r/subselect_sj2.result b/mysql-test/r/subselect_sj2.result --- a/mysql-test/r/subselect_sj2.result 2008-02-21 02:26:54 -08:00 +++ b/mysql-test/r/subselect_sj2.result 2008-04-06 00:20:37 -07:00 @@ -59,8 +59,6 @@ set @save_max_heap_table_size= @@max_hea set max_heap_table_size=16384; set @save_join_buffer_size = @@join_buffer_size; set join_buffer_size= 8000; -Warnings: -Warning 1292 Truncated incorrect join_buffer_size value: '8000' drop table t3; create table t3 ( a int, @@ -111,8 +109,6 @@ a b drop table t1, t2, t3; set @save_join_buffer_size = @@join_buffer_size; set join_buffer_size= 8000; -Warnings: -Warning 1292 Truncated incorrect join_buffer_size value: '8000' create table t1 (a int, filler1 binary(200), filler2 binary(200)); insert into t1 select a, 'filler123456', 'filler123456' from t0; insert into t1 select a+10, 'filler123456', 'filler123456' from t0; diff -Nrup a/mysql-test/suite/falcon/r/falcon_select.result b/mysql-test/suite/falcon/r/falcon_select.result --- a/mysql-test/suite/falcon/r/falcon_select.result 2008-02-14 07:45:49 -08:00 +++ b/mysql-test/suite/falcon/r/falcon_select.result 2008-04-06 00:20:37 -07:00 @@ -1331,15 +1331,15 @@ id select_type table type possible_keys 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 range PRIMARY PRIMARY 1 NULL 1 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where 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 range PRIMARY PRIMARY 1 NULL 13 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where 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 range PRIMARY PRIMARY 1 NULL 1 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where 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 @@ -1355,15 +1355,15 @@ id select_type table type possible_keys 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 range PRIMARY PRIMARY 1 NULL 1 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where 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 range PRIMARY PRIMARY 1 NULL 13 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where 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 ALL NULL NULL NULL NULL 1199 +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; companynr companynr 37 36 @@ -2268,8 +2268,8 @@ explain select * from t1 left join t2 on left join t4 on id3 = id4 where id2 = 1 or id4 = 1; 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 NULL NULL NULL NULL 1 -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t4 ref id4 id4 4 test.t3.id3 2 Using where 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; @@ -2302,7 +2302,7 @@ insert into t1 values (1,2), (2,2), (3,2 insert into t2 values (1,3), (2,3), (3,4), (4,4); explain select * from t1 left join t2 on a=c where d in (4); id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ref c,d d 5 const 2 Using where +1 SIMPLE t2 ref c,d d 5 const 2 1 SIMPLE t1 ref a a 5 test.t2.c 2 select * from t1 left join t2 on a=c where d in (4); a b c d @@ -2310,7 +2310,7 @@ a b c d 4 2 4 4 explain select * from t1 left join t2 on a=c where d = 4; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ref c,d d 5 const 2 Using where +1 SIMPLE t2 ref c,d d 5 const 2 1 SIMPLE t1 ref a a 5 test.t2.c 2 select * from t1 left join t2 on a=c where d = 4; a b c d diff -Nrup a/mysql-test/suite/ndb/r/ndb_condition_pushdown.result b/mysql-test/suite/ndb/r/ndb_condition_pushdown.result --- a/mysql-test/suite/ndb/r/ndb_condition_pushdown.result 2008-03-20 02:20:04 -07:00 +++ b/mysql-test/suite/ndb/r/ndb_condition_pushdown.result 2008-04-06 00:20:37 -07:00 @@ -1910,7 +1910,7 @@ insert into NodeAlias VALUES(null, 8 , ' 12:22:26'); explain select * from NodeAlias where (aliasKey LIKE '491803%'); id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE NodeAlias range NodeAlias_KeyIndex NodeAlias_KeyIndex 48 NULL 10 Using where with pushed condition +1 SIMPLE NodeAlias range NodeAlias_KeyIndex NodeAlias_KeyIndex 48 NULL 10 Using where with pushed condition; Using MRR select * from NodeAlias where (aliasKey LIKE '491803%') order by id; id nodeId displayName aliasKey objectVersion changed 7 8 491803% 491803% 0 2008-03-10 12:22:26 diff -Nrup a/mysql-test/t/join_cache.test b/mysql-test/t/join_cache.test --- a/mysql-test/t/join_cache.test 2008-03-31 22:22:37 -07:00 +++ b/mysql-test/t/join_cache.test 2008-04-06 00:20:37 -07:00 @@ -142,4 +142,223 @@ show variables like 'join_cache_level'; DROP DATABASE world; +CREATE DATABASE world; + +use world; + +--source include/world_schema.inc + +--disable_query_log +--disable_warnings +--source include/world.inc +--disable_warnings +--disable_query_log + +show variables like 'join_buffer_size'; +set join_cache_level=5; +show variables like 'join_cache_level'; + +EXPLAIN +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +EXPLAIN +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; + +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; + +EXPLAIN +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +EXPLAIN +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) + FROM Country LEFT JOIN CountryLanguage ON + (CountryLanguage.Country=Country.Code AND Language='English') + WHERE + Country.Population > 10000000; + +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) + FROM Country LEFT JOIN CountryLanguage ON + (CountryLanguage.Country=Country.Code AND Language='English') + WHERE + Country.Population > 10000000; + +set join_cache_level=6; +show variables like 'join_cache_level'; + +EXPLAIN +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +EXPLAIN +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; + +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; + +EXPLAIN +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +EXPLAIN +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) + FROM Country LEFT JOIN CountryLanguage ON + (CountryLanguage.Country=Country.Code AND Language='English') + WHERE + Country.Population > 10000000; + +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) + FROM Country LEFT JOIN CountryLanguage ON + (CountryLanguage.Country=Country.Code AND Language='English') + WHERE + Country.Population > 10000000; + +set join_buffer_size=256; +show variables like 'join_buffer_size'; + +set join_cache_level=5; +show variables like 'join_cache_level'; + +EXPLAIN +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +EXPLAIN +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; + +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; + +EXPLAIN +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +EXPLAIN +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) + FROM Country LEFT JOIN CountryLanguage ON + (CountryLanguage.Country=Country.Code AND Language='English') + WHERE + Country.Population > 10000000; + +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) + FROM Country LEFT JOIN CountryLanguage ON + (CountryLanguage.Country=Country.Code AND Language='English') + WHERE + Country.Population > 10000000; + +set join_cache_level=6; +show variables like 'join_cache_level'; + +EXPLAIN +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +EXPLAIN +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; + +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; + +EXPLAIN +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +EXPLAIN +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) + FROM Country LEFT JOIN CountryLanguage ON + (CountryLanguage.Country=Country.Code AND Language='English') + WHERE + Country.Population > 10000000; + +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) + FROM Country LEFT JOIN CountryLanguage ON + (CountryLanguage.Country=Country.Code AND Language='English') + WHERE + Country.Population > 10000000; + +set join_cache_level=default; +set join_buffer_size=default; + +show variables like 'join_buffer_size'; +show variables like 'join_cache_level'; + +DROP DATABASE world; diff -Nrup a/mysql-test/t/join_nested_jcl6.test b/mysql-test/t/join_nested_jcl6.test --- /dev/null Wed Dec 31 16:00:00 196900 +++ b/mysql-test/t/join_nested_jcl6.test 2008-04-05 23:34:57 -07:00 @@ -0,0 +1,11 @@ +# +# Run join_nested.test with BKA enabled +# + +set join_cache_level=6; +show variables like 'join_cache_level'; + +--source t/join_nested.test + +set join_cache_level=default; +show variables like 'join_cache_level'; diff -Nrup a/sql/handler.cc b/sql/handler.cc --- a/sql/handler.cc 2008-03-23 06:35:02 -07:00 +++ b/sql/handler.cc 2008-04-06 00:20:37 -07:00 @@ -4290,7 +4290,7 @@ int DsMrr_impl::dsmrr_init(handler *h, K uint elem_size; uint keyno; Item *pushed_cond= NULL; - handler *new_h2; + handler *new_h2= 0; DBUG_ENTER("DsMrr_impl::dsmrr_init"); keyno= h->active_index; diff -Nrup a/sql/sql_select.cc b/sql/sql_select.cc --- a/sql/sql_select.cc 2008-03-31 23:17:44 -07:00 +++ b/sql/sql_select.cc 2008-04-06 00:20:37 -07:00 @@ -138,8 +138,6 @@ evaluate_join_record(JOIN *join, JOIN_TA static enum_nested_loop_state evaluate_null_complemented_join_record(JOIN *join, JOIN_TAB *join_tab); static enum_nested_loop_state -flush_cached_records(JOIN *join, JOIN_TAB *join_tab, bool skip_last); -static enum_nested_loop_state end_send(JOIN *join, JOIN_TAB *join_tab, bool end_of_records); static enum_nested_loop_state end_write(JOIN *join, JOIN_TAB *join_tab, bool end_of_records); @@ -8153,63 +8151,131 @@ uint make_join_orderinfo(JOIN *join) return i; } +static +void set_join_cache_denial(JOIN_TAB *join_tab) +{ + if (join_tab->cache) + { + join_tab->cache->free(); + join_tab->cache= 0; + } + if (join_tab->use_join_cache) + { + join_tab->use_join_cache= FALSE; + join_tab[-1].next_select= sub_select; + } +} + +static +void revise_cache_usage(JOIN_TAB *join_tab) +{ + JOIN_TAB *tab; + JOIN_TAB *first_inner; + + if (join_tab->first_inner) + { + JOIN_TAB *end_tab= join_tab; + JOIN_TAB *last_inner= join_tab->first_inner->last_inner; + for (first_inner= join_tab->first_inner; + first_inner && first_inner->last_inner == last_inner; + first_inner= first_inner->first_upper) + { + for (tab= end_tab-1; tab >= first_inner; tab--) + { + if (tab->first_inner->last_inner == last_inner) + set_join_cache_denial(tab); + } + end_tab= first_inner; + } + } + else if (tab->first_sj_inner_tab) + { + first_inner= tab->first_sj_inner_tab; + for (tab= join_tab-1; tab >= first_inner; tab--) + { + if (tab->first_sj_inner_tab == first_inner) + set_join_cache_denial(tab); + } + } +} + static bool check_join_cache_usage(JOIN_TAB *tab, JOIN *join, ulonglong options, uint no_jbuf_after) { + uint flags; + COST_VECT cost; + uint bufsz= 4096; + JOIN_CACHE *prev_cache=0; uint cache_level= join->thd->variables.join_cache_level; bool force_unlinked_cache= test(cache_level & 1); uint i= tab-join->join_tab; + if (cache_level == 0) + return FALSE; if (i == join->const_tables) return FALSE; if (options & SELECT_NO_JOIN_CACHE) - return FALSE; + goto no_join_cache; if (tab->use_quick == 2) - return FALSE; + goto no_join_cache; if (force_unlinked_cache && - (tab->first_inner && tab->first_inner != tab || - tab->first_sj_inner_tab && tab->first_sj_inner_tab != tab) && - tab->get_first_inner_table()->cache) - return FALSE; + (tab->is_inner_table_of_semi_join_with_first_match() && + !tab->is_single_inner_of_semi_join_with_first_match() || + tab->is_inner_table_of_outer_join() && + !tab->is_single_inner_of_outer_join())) + goto no_join_cache; + if (!(i <= no_jbuf_after) || tab->insideout_match_tab) + goto no_join_cache; + for (JOIN_TAB *first_inner= tab->first_inner; first_inner; + first_inner= first_inner->first_upper) + { + if (first_inner != tab && !first_inner->use_join_cache) + goto no_join_cache; + } + if (tab->is_inner_table_of_semi_join_with_first_match() && + !tab->is_single_inner_of_semi_join_with_first_match() && + !tab->first_sj_inner_tab->use_join_cache) + goto no_join_cache; - JOIN_CACHE *prev_cache= force_unlinked_cache ? 0 : tab[-1].cache; + if (!force_unlinked_cache) + prev_cache= tab[-1].cache; switch (tab->type) { case JT_ALL: - if (tab->first_inner || !(i <= no_jbuf_after) || tab->insideout_match_tab) - return FALSE; + if (cache_level <= 2 && (tab->first_inner || tab->first_sj_inner_tab)) + goto no_join_cache; if ((options & SELECT_DESCRIBE) || (tab->cache || (tab->cache= new JOIN_CACHE_BNL(join, tab, prev_cache))) && !tab->cache->init()) return TRUE; - return FALSE; + goto no_join_cache; case JT_REF: case JT_EQ_REF: - { if (cache_level <= 4) return FALSE; - uint flag= HA_MRR_NO_NULL_ENDPOINTS; - COST_VECT cost; - uint bufsz= 4096; + flags= HA_MRR_NO_NULL_ENDPOINTS; + if (tab->table->covering_keys.is_set(tab->ref.key)) + flags|= HA_MRR_INDEX_ONLY; tab->table->file->multi_range_read_info(tab->ref.key, 10, 20, - &bufsz, &flag, &cost); - if (!(i <= no_jbuf_after)) - return FALSE; - if (!(flag & HA_MRR_USE_DEFAULT_IMPL) && + &bufsz, &flags, &cost); + if (!(flags & HA_MRR_USE_DEFAULT_IMPL) && ((options & SELECT_DESCRIBE) || (tab->cache || - (tab->cache= new JOIN_CACHE_BKA(join, tab, prev_cache))) && + (tab->cache= new JOIN_CACHE_BKA(join, tab, flags, prev_cache))) && !tab->cache->init())) return TRUE; - return FALSE; - } + goto no_join_cache; default : ; } - return FALSE; + +no_join_cache: + if (cache_level>2) + revise_cache_usage(tab); + return FALSE; } /* @@ -8244,6 +8310,7 @@ make_join_readinfo(JOIN *join, ulonglong for (i=join->const_tables ; i < join->tables ; i++) { + JOIN_TAB *first_revised; JOIN_TAB *tab=join->join_tab+i; TABLE *table=tab->table; bool using_join_cache; @@ -8327,7 +8394,7 @@ make_join_readinfo(JOIN *join, ulonglong { using_join_cache= TRUE; tab[-1].next_select=sub_select_cache; - } + } } else { @@ -8489,7 +8556,10 @@ void JOIN_TAB::cleanup() delete quick; quick= 0; if (cache) + { cache->free(); + cache= 0; + } limit= 0; if (table) { @@ -16826,8 +16896,11 @@ void JOIN_CACHE::set_constants() If some of the fields are referenced from other caches then the record length allows us to easily reach the saved offsets for these fields since the offsets are stored at the very end of the record. + However at this moment we don't know whether we have referenced fields for + the cache or not. Later when a referenced field is registered for the cache + we adjust the value of the flag 'with_length'. */ - with_length= is_key_access() || with_match_flag || referenced_fields; + with_length= is_key_access() || with_match_flag; /* At this moment we don't know yet the value of 'referenced_fields', but in any case it can't be greater than the value of 'fields'. @@ -17026,14 +17099,15 @@ int JOIN_CACHE_BKA::init() { /* Register the referenced field 'copy': - - set the offset number in copy->referenced_field_no - - adjust the values of 'pack_length' and 'pack_last_length' + - set the offset number in copy->referenced_field_no, + - adjust the value of the flag 'with_length', + - adjust the values of 'pack_length' and 'pack_last_length'. */ - copy->referenced_field_no= ++referenced_fields; + copy->referenced_field_no= ++cache->referenced_fields; + cache->with_length= TRUE; cache->pack_length+= cache->get_size_of_fld_offset(); cache->pack_last_length+= cache->get_size_of_fld_offset(); - } - } + } } } } } @@ -17041,7 +17115,7 @@ int JOIN_CACHE_BKA::init() blob_ptr= copy_ptr; /* Now create local fields that are used to build ref for this key access */ - copy= field_descr; + copy= field_descr+flag_fields; for (tab= join_tab-tables; tab < join_tab ; tab++) { length+= add_table_data_fields_to_join_cache(tab, &tab->table->tmp_set, @@ -17049,16 +17123,19 @@ int JOIN_CACHE_BKA::init() ©, ©_ptr); } - check_emb_key_usage(); + use_emb_key= check_emb_key_usage(); create_remaining_fields(FALSE); set_constants(); + if (join_tab->is_single_inner_of_semi_join_with_first_match()) + mrr_mode|= HA_MRR_SEMI_JOIN; + if (alloc_buffer()) DBUG_RETURN(1); - reset(TRUE); + reset(TRUE); DBUG_RETURN(0); } @@ -17104,6 +17181,7 @@ bool JOIN_CACHE_BKA::check_emb_key_usage Item *item; KEY_PART_INFO *key_part; CACHE_FIELD *copy; + CACHE_FIELD *copy_end; uint len= 0; TABLE *table= join_tab->table; TABLE_REF *ref= &join_tab->ref; @@ -17150,9 +17228,9 @@ bool JOIN_CACHE_BKA::check_emb_key_usage is not considered as embedded. */ - for (copy= field_descr+flag_fields; - i < local_key_arg_fields; - i++, copy++) + copy= field_descr+flag_fields; + copy_end= copy+local_key_arg_fields; + for ( ; copy < copy_end; copy++) { if (copy->type != 0) return FALSE; @@ -17187,7 +17265,7 @@ bool JOIN_CACHE_BKA::check_emb_key_usage } } - return ((use_emb_key= TRUE)); + return TRUE; } @@ -17270,7 +17348,7 @@ uint JOIN_CACHE::write_record_data(uchar bool last_record; CACHE_FIELD *copy; CACHE_FIELD *copy_end; - uchar *cp= this->pos; + uchar *cp= pos; uchar *init_pos= cp; uchar *rec_len_ptr= 0; @@ -17368,7 +17446,7 @@ uint JOIN_CACHE::write_record_data(uchar } /* Save the offset of the field to put it later at the end of the record */ if (copy->referenced_field_no) - copy->offset= pos-curr_rec_pos; + copy->offset= cp-curr_rec_pos; if (copy->type == CACHE_BLOB) { @@ -17484,6 +17562,7 @@ uint JOIN_CACHE::write_record_data(uchar void JOIN_CACHE::reset(bool for_writing) { pos= buff; + curr_rec_link= 0; if (for_writing) { records= 0; @@ -17504,8 +17583,8 @@ void JOIN_CACHE::reset(bool for_writing) This default implementation of the virtual function put_record links the record that it written into the join buffer with the matching record in the previous cache if there is any. - The implementation assumes that prev_cache get_curr_rec() - returns exactly the pointer to this matching record. + The implementation assumes that the function get_curr_link() + will return exactly the pointer to this matching record. RETURN TRUE if it has been decided that it should be the last record @@ -17516,7 +17595,9 @@ void JOIN_CACHE::reset(bool for_writing) bool JOIN_CACHE::put_record() { bool is_full; - uchar *link = prev_cache ? prev_cache->get_curr_rec() : 0; + uchar *link= 0; + if (prev_cache) + link= prev_cache->get_curr_rec_link(); write_record_data(link, &is_full); return is_full; } @@ -17550,19 +17631,19 @@ bool JOIN_CACHE::put_record() bool JOIN_CACHE::get_record() { bool res; - uchar *prev_rec_ptr= 0; + uchar *prev_rec_ptr; if (with_length) pos+= size_of_rec_len; if (prev_cache) { - prev_rec_ptr= prev_cache->get_rec_ref(pos); pos+= prev_cache->get_size_of_rec_offset(); - } + prev_rec_ptr= prev_cache->get_rec_ref(pos); + } curr_rec_pos= pos; if (!(res= read_all_record_fields() == 0)) { pos+= referenced_fields*size_of_fld_ofs; - if (prev_rec_ptr) + if (prev_cache) prev_cache->get_record_by_pos(prev_rec_ptr); } return res; @@ -17595,8 +17676,7 @@ void JOIN_CACHE::get_record_by_pos(uchar pos= save_pos; if (prev_cache) { - uchar *prev_rec_ptr= - prev_cache->get_rec_ref(rec_ptr-prev_cache->get_size_of_rec_offset()); + uchar *prev_rec_ptr= prev_cache->get_rec_ref(rec_ptr); prev_cache->get_record_by_pos(prev_rec_ptr); } } @@ -17836,7 +17916,7 @@ bool JOIN_CACHE::skip_record_if_match() /* Check whether the match flag is on */ if (test(*(pos+offset))) { - pos+= get_rec_length(pos); + pos+= size_of_rec_len + get_rec_length(pos); return TRUE; } return FALSE; @@ -17887,7 +17967,7 @@ enum_nested_loop_state JOIN_CACHE::join_ if (outer_join_first_inner) join_tab->not_null_compl= TRUE; - if (!outer_join_first_inner || join_tab->first_inner->not_null_compl) + if (!join_tab->first_inner || join_tab->first_inner->not_null_compl) { /* Find all records from join_tab that match records from join buffer */ rc= join_matching_records(skip_last); @@ -18445,7 +18525,7 @@ enum_nested_loop_state JOIN_CACHE_BKA::j JOIN_TAB *tab; handler *file= join_tab->table->file; enum_nested_loop_state rc= NESTED_LOOP_OK; - uchar *rec_ptr; + uchar *rec_ptr= 0; bool check_only_first_match= join_tab->check_only_first_match(); join_tab->table->null_row= 0; @@ -18514,6 +18594,7 @@ enum_nested_loop_state JOIN_CACHE_BKA::j !(res= do_sj_dups_weedout(join->thd, join_tab->check_weed_out_table))) { + set_curr_rec_link(rec_ptr); rc= (join_tab->next_select)(join, join_tab+1, 0); if (rc != NESTED_LOOP_OK && rc != NESTED_LOOP_NO_MORE_ROWS) { @@ -18575,7 +18656,6 @@ uint JOIN_CACHE_BKA::get_next_key(uchar uint len; uint32 rec_len; uchar *init_pos; - uchar *rec_ptr; JOIN_CACHE *cache; if (pos > last_rec_pos) @@ -18609,6 +18689,7 @@ uint JOIN_CACHE_BKA::get_next_key(uchar /* Read key arguments from previous caches if there are any such fields */ if (external_key_arg_fields) { + uchar *rec_ptr= curr_rec_pos; uint key_arg_count= external_key_arg_fields; CACHE_FIELD **copy_ptr= blob_ptr-key_arg_count; for (cache= prev_cache; key_arg_count; cache= cache->prev_cache) @@ -18635,10 +18716,11 @@ uint JOIN_CACHE_BKA::get_next_key(uchar Read the other key arguments from the current record. The fields for these arguments are always first in the sequence of the record's fields. */ - CACHE_FIELD *copy= field_descr; + CACHE_FIELD *copy= field_descr+flag_fields; CACHE_FIELD *copy_end= copy+local_key_arg_fields; + bool blob_in_rec_buff= blob_data_is_in_rec_buff(curr_rec_pos); for ( ; copy < copy_end; copy++) - read_record_field(copy, blob_data_is_in_rec_buff(curr_rec_pos)); + read_record_field(copy, blob_in_rec_buff); /* Build the key over the fields read into the record buffers */ TABLE_REF *ref= &join_tab->ref; diff -Nrup a/sql/sql_select.h b/sql/sql_select.h --- a/sql/sql_select.h 2008-03-31 23:17:45 -07:00 +++ b/sql/sql_select.h 2008-04-06 00:20:37 -07:00 @@ -284,13 +284,21 @@ typedef struct st_join_table { } return test(used_rowid_fields); } + bool is_inner_table_of_semi_join_with_first_match() + { + return first_sj_inner_tab != NULL; + } + bool is_inner_table_of_outer_join() + { + return first_inner != NULL; + } bool is_single_inner_of_semi_join_with_first_match() { return first_sj_inner_tab == this && last_sj_inner_tab == this; } bool is_single_inner_of_outer_join() { - return first_inner && first_inner == last_inner; + return first_inner == this && first_inner->last_inner == this; } bool is_first_inner_for_outer_join() { @@ -537,7 +545,19 @@ protected: Flag is set on if the blob data for the last record in the join buffer is in record buffers rather than in the join cache. */ - bool last_rec_blob_data_is_in_rec_buff; + bool last_rec_blob_data_is_in_rec_buff; + + /* + Pointer to the position to the current record link. + Record links are used only with linked caches. Record links allow to set + connections between parts of one join record that are stored in different + join buffers. + In the simplest case a record link is just a pointer to the beginning of + the record stored in the buffer. + In a more general case a link could be a reference to an array of pointers + to records in the buffer. + */ + uchar *curr_rec_link; void calc_record_fields(); int alloc_fields(uint external_fields); @@ -551,7 +571,7 @@ protected: uchar *get_rec_ref(uchar *ptr) { - return buff+get_offset(size_of_rec_ofs, ptr); + return buff+get_offset(size_of_rec_ofs, ptr-get_size_of_rec_offset()); } ulong get_rec_length(uchar *ptr) { @@ -664,6 +684,15 @@ public: /* Shall return the position of the current record */ virtual uchar *get_curr_rec() { return curr_rec_pos; } + + /* Shall set the current record link */ + virtual void set_curr_rec_link(uchar *link) { curr_rec_link= link; } + + /* Shall return the current record link */ + virtual uchar *get_curr_rec_link() + { + return (curr_rec_link ? curr_rec_link : get_curr_rec()); + } /* Join records from the join buffer with records from the next join table */ enum_nested_loop_state join_records(bool skip_last); @@ -780,12 +809,14 @@ public: This constructor creates an unlinked BKA join cache. The cache is to be used to join table 'tab' to the result of joining the previous tables specified by the 'j' parameter. + The MRR mode initially is set to 'flags'. */ - JOIN_CACHE_BKA(JOIN *j, JOIN_TAB *tab) + JOIN_CACHE_BKA(JOIN *j, JOIN_TAB *tab, uint flags) { join= j; join_tab= tab; prev_cache= next_cache= 0; + mrr_mode= flags; } /* @@ -793,8 +824,9 @@ public: used to join table 'tab' to the result of joining the previous tables specified by the 'j' parameter. The parameter 'prev' specifies the cache object to which this cache is linked. + The MRR mode initially is set to 'flags'. */ - JOIN_CACHE_BKA(JOIN *j, JOIN_TAB *tab, JOIN_CACHE* prev) + JOIN_CACHE_BKA(JOIN *j, JOIN_TAB *tab, uint flags, JOIN_CACHE* prev) { join= j; join_tab= tab; @@ -802,6 +834,7 @@ public: next_cache= 0; if (prev) prev->next_cache= this; + mrr_mode= flags; } /* Initialize the BNL cache */
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| • bk commit into 6.0 tree (igor:1.2608) | igor | 6 Apr |
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