# # test of left outer join # --disable_warnings drop table if exists t0,t1,t2,t3,t4,t5; --enable_warnings CREATE TABLE t1 ( grp int(11) default NULL, a bigint(20) unsigned default NULL, c char(10) NOT NULL default '' ) ENGINE=MyISAM; INSERT INTO t1 VALUES (1,1,'a'),(2,2,'b'),(2,3,'c'),(3,4,'E'),(3,5,'C'),(3,6,'D'),(NULL,NULL,''); create table t2 (id int, a bigint unsigned not null, c char(10), d int, primary key (a)); insert into t2 values (1,1,"a",1),(3,4,"A",4),(3,5,"B",5),(3,6,"C",6),(4,7,"D",7); select t1.*,t2.* from t1 JOIN t2 where t1.a=t2.a; select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) order by t1.grp,t1.a,t2.c; select t1.*,t2.* from { oj t2 left outer join t1 on (t1.a=t2.a) }; select t1.*,t2.* from t1 as t0,{ oj t2 left outer join t1 on (t1.a=t2.a) } WHERE t0.a=2; select t1.*,t2.* from t1 left join t2 using (a); select t1.*,t2.* from t1 left join t2 using (a) where t1.a=t2.a; select t1.*,t2.* from t1 left join t2 using (a,c); select t1.*,t2.* from t1 left join t2 using (c); select t1.*,t2.* from t1 natural left outer join t2; select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) where t2.id=3; select t1.*,t2.* from t1 left join t2 on (t1.a=t2.a) where t2.id is null; explain select t1.*,t2.* from t1,t2 where t1.a=t2.a and isnull(t2.a)=1; explain select t1.*,t2.* from t1 left join t2 on t1.a=t2.a where isnull(t2.a)=1; select t1.*,t2.*,t3.a from t1 left join t2 on (t1.a=t2.a) left join t1 as t3 on (t2.a=t3.a); # The next query should rearange the left joins to get this to work --error 1120 explain select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on (t1.a=t3.a); --error 1120 select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on (t1.a=t3.a); # The next query should give an error in MySQL --error 1120 select t1.*,t2.*,t3.a from t1 left join t2 on (t3.a=t2.a) left join t1 as t3 on (t2.a=t3.a); # Test of inner join select t1.*,t2.* from t1 inner join t2 using (a); select t1.*,t2.* from t1 inner join t2 on (t1.a=t2.a); select t1.*,t2.* from t1 natural join t2; drop table t1,t2; # # Test of left join bug # CREATE TABLE t1 ( usr_id INT unsigned NOT NULL, uniq_id INT unsigned NOT NULL AUTO_INCREMENT, start_num INT unsigned NOT NULL DEFAULT 1, increment INT unsigned NOT NULL DEFAULT 1, PRIMARY KEY (uniq_id), INDEX usr_uniq_idx (usr_id, uniq_id), INDEX uniq_usr_idx (uniq_id, usr_id) ); CREATE TABLE t2 ( id INT unsigned NOT NULL DEFAULT 0, usr2_id INT unsigned NOT NULL DEFAULT 0, max INT unsigned NOT NULL DEFAULT 0, c_amount INT unsigned NOT NULL DEFAULT 0, d_max INT unsigned NOT NULL DEFAULT 0, d_num INT unsigned NOT NULL DEFAULT 0, orig_time INT unsigned NOT NULL DEFAULT 0, c_time INT unsigned NOT NULL DEFAULT 0, active ENUM ("no","yes") NOT NULL, PRIMARY KEY (id,usr2_id), INDEX id_idx (id), INDEX usr2_idx (usr2_id) ); INSERT INTO t1 VALUES (3,NULL,0,50),(3,NULL,0,200),(3,NULL,0,25),(3,NULL,0,84676),(3,NULL,0,235),(3,NULL,0,10),(3,NULL,0,3098),(3,NULL,0,2947),(3,NULL,0,8987),(3,NULL,0,8347654),(3,NULL,0,20398),(3,NULL,0,8976),(3,NULL,0,500),(3,NULL,0,198); #1st select shows that one record is returned with null entries for the right #table, when selecting on an id that does not exist in the right table t2 SELECT t1.usr_id,t1.uniq_id,t1.increment, t2.usr2_id,t2.c_amount,t2.max FROM t1 LEFT JOIN t2 ON t2.id = t1.uniq_id WHERE t1.uniq_id = 4 ORDER BY t2.c_amount; # The same with RIGHT JOIN SELECT t1.usr_id,t1.uniq_id,t1.increment, t2.usr2_id,t2.c_amount,t2.max FROM t2 RIGHT JOIN t1 ON t2.id = t1.uniq_id WHERE t1.uniq_id = 4 ORDER BY t2.c_amount; INSERT INTO t2 VALUES (2,3,3000,6000,0,0,746584,837484,'yes'); --error 1062 INSERT INTO t2 VALUES (2,3,3000,6000,0,0,746584,837484,'yes'); INSERT INTO t2 VALUES (7,3,1000,2000,0,0,746294,937484,'yes'); #3rd select should show that one record is returned with null entries for the # right table, when selecting on an id that does not exist in the right table # t2 but this select returns an empty set!!!! SELECT t1.usr_id,t1.uniq_id,t1.increment,t2.usr2_id,t2.c_amount,t2.max FROM t1 LEFT JOIN t2 ON t2.id = t1.uniq_id WHERE t1.uniq_id = 4 ORDER BY t2.c_amount; SELECT t1.usr_id,t1.uniq_id,t1.increment,t2.usr2_id,t2.c_amount,t2.max FROM t1 LEFT JOIN t2 ON t2.id = t1.uniq_id WHERE t1.uniq_id = 4 GROUP BY t2.c_amount; # Removing the ORDER BY works: SELECT t1.usr_id,t1.uniq_id,t1.increment,t2.usr2_id,t2.c_amount,t2.max FROM t1 LEFT JOIN t2 ON t2.id = t1.uniq_id WHERE t1.uniq_id = 4; drop table t1,t2; # # Test of LEFT JOIN with const tables (failed for frankie@etsetb.upc.es) # CREATE TABLE t1 ( cod_asig int(11) DEFAULT '0' NOT NULL, desc_larga_cat varchar(80) DEFAULT '' NOT NULL, desc_larga_cas varchar(80) DEFAULT '' NOT NULL, desc_corta_cat varchar(40) DEFAULT '' NOT NULL, desc_corta_cas varchar(40) DEFAULT '' NOT NULL, cred_total double(3,1) DEFAULT '0.0' NOT NULL, pre_requisit int(11), co_requisit int(11), preco_requisit int(11), PRIMARY KEY (cod_asig) ); INSERT INTO t1 VALUES (10360,'asdfggfg','Introduccion a los Ordenadores I','asdfggfg','Introduccio Ordinadors I',6.0,NULL,NULL,NULL); INSERT INTO t1 VALUES (10361,'Components i Circuits Electronics I','Componentes y Circuitos Electronicos I','Components i Circuits Electronics I','Comp. i Circ. Electr. I',6.0,NULL,NULL,NULL); INSERT INTO t1 VALUES (10362,'Laboratori d`Ordinadors','Laboratorio de Ordenadores','Laboratori d`Ordinadors','Laboratori Ordinadors',4.5,NULL,NULL,NULL); INSERT INTO t1 VALUES (10363,'Tecniques de Comunicacio Oral i Escrita','Tecnicas de Comunicacion Oral y Escrita','Tecniques de Comunicacio Oral i Escrita','Tec. Com. Oral i Escrita',4.5,NULL,NULL,NULL); INSERT INTO t1 VALUES (11403,'Projecte Fi de Carrera','Proyecto Fin de Carrera','Projecte Fi de Carrera','PFC',9.0,NULL,NULL,NULL); INSERT INTO t1 VALUES (11404,'+lgebra lineal','Algebra lineal','+lgebra lineal','+lgebra lineal',15.0,NULL,NULL,NULL); INSERT INTO t1 VALUES (11405,'+lgebra lineal','Algebra lineal','+lgebra lineal','+lgebra lineal',18.0,NULL,NULL,NULL); INSERT INTO t1 VALUES (11406,'Calcul Infinitesimal','C�lculo Infinitesimal','Calcul Infinitesimal','Calcul Infinitesimal',15.0,NULL,NULL,NULL); CREATE TABLE t2 ( idAssignatura int(11) DEFAULT '0' NOT NULL, Grup int(11) DEFAULT '0' NOT NULL, Places smallint(6) DEFAULT '0' NOT NULL, PlacesOcupades int(11) DEFAULT '0', PRIMARY KEY (idAssignatura,Grup) ); INSERT INTO t2 VALUES (10360,12,333,0); INSERT INTO t2 VALUES (10361,30,2,0); INSERT INTO t2 VALUES (10361,40,3,0); INSERT INTO t2 VALUES (10360,45,10,0); INSERT INTO t2 VALUES (10362,10,12,0); INSERT INTO t2 VALUES (10360,55,2,0); INSERT INTO t2 VALUES (10360,70,0,0); INSERT INTO t2 VALUES (10360,565656,0,0); INSERT INTO t2 VALUES (10360,32767,7,0); INSERT INTO t2 VALUES (10360,33,8,0); INSERT INTO t2 VALUES (10360,7887,85,0); INSERT INTO t2 VALUES (11405,88,8,0); INSERT INTO t2 VALUES (10360,0,55,0); INSERT INTO t2 VALUES (10360,99,0,0); INSERT INTO t2 VALUES (11411,30,10,0); INSERT INTO t2 VALUES (11404,0,0,0); INSERT INTO t2 VALUES (10362,11,111,0); INSERT INTO t2 VALUES (10363,33,333,0); INSERT INTO t2 VALUES (11412,55,0,0); INSERT INTO t2 VALUES (50003,66,6,0); INSERT INTO t2 VALUES (11403,5,0,0); INSERT INTO t2 VALUES (11406,11,11,0); INSERT INTO t2 VALUES (11410,11410,131,0); INSERT INTO t2 VALUES (11416,11416,32767,0); INSERT INTO t2 VALUES (11409,0,0,0); CREATE TABLE t3 ( id int(11) NOT NULL auto_increment, dni_pasaporte char(16) DEFAULT '' NOT NULL, idPla int(11) DEFAULT '0' NOT NULL, cod_asig int(11) DEFAULT '0' NOT NULL, any smallint(6) DEFAULT '0' NOT NULL, quatrimestre smallint(6) DEFAULT '0' NOT NULL, estat char(1) DEFAULT 'M' NOT NULL, PRIMARY KEY (id), UNIQUE dni_pasaporte (dni_pasaporte,idPla), UNIQUE dni_pasaporte_2 (dni_pasaporte,idPla,cod_asig,any,quatrimestre) ); INSERT INTO t3 VALUES (1,'11111111',1,10362,98,1,'M'); CREATE TABLE t4 ( id int(11) NOT NULL auto_increment, papa int(11) DEFAULT '0' NOT NULL, fill int(11) DEFAULT '0' NOT NULL, idPla int(11) DEFAULT '0' NOT NULL, PRIMARY KEY (id), KEY papa (idPla,papa), UNIQUE papa_2 (idPla,papa,fill) ); INSERT INTO t4 VALUES (1,-1,10360,1); INSERT INTO t4 VALUES (2,-1,10361,1); INSERT INTO t4 VALUES (3,-1,10362,1); SELECT DISTINCT fill,desc_larga_cat,cred_total,Grup,Places,PlacesOcupades FROM t4 LEFT JOIN t3 ON t3.cod_asig=fill AND estat='S' AND dni_pasaporte='11111111' AND t3.idPla=1 , t2,t1 WHERE fill=t1.cod_asig AND Places>PlacesOcupades AND fill=idAssignatura AND t4.idPla=1 AND papa=-1; SELECT DISTINCT fill,t3.idPla FROM t4 LEFT JOIN t3 ON t3.cod_asig=t4.fill AND t3.estat='S' AND t3.dni_pasaporte='1234' AND t3.idPla=1 ; INSERT INTO t3 VALUES (3,'1234',1,10360,98,1,'S'); SELECT DISTINCT fill,t3.idPla FROM t4 LEFT JOIN t3 ON t3.cod_asig=t4.fill AND t3.estat='S' AND t3.dni_pasaporte='1234' AND t3.idPla=1 ; drop table t1,t2,t3,test.t4; # # Test of IS NULL on AUTO_INCREMENT with LEFT JOIN # CREATE TABLE t1 ( id smallint(5) unsigned NOT NULL auto_increment, name char(60) DEFAULT '' NOT NULL, PRIMARY KEY (id) ); INSERT INTO t1 VALUES (1,'Antonio Paz'); INSERT INTO t1 VALUES (2,'Lilliana Angelovska'); INSERT INTO t1 VALUES (3,'Thimble Smith'); CREATE TABLE t2 ( id smallint(5) unsigned NOT NULL auto_increment, owner smallint(5) unsigned DEFAULT '0' NOT NULL, name char(60), PRIMARY KEY (id) ); INSERT INTO t2 VALUES (1,1,'El Gato'); INSERT INTO t2 VALUES (2,1,'Perrito'); INSERT INTO t2 VALUES (3,3,'Happy'); select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner); select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null; explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null; explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.name is null; select count(*) from t1 left join t2 on (t1.id = t2.owner); select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner); select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null; explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null; explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.name is null; select count(*) from t2 right join t1 on (t1.id = t2.owner); select t1.name, t2.name, t2.id,t3.id from t2 right join t1 on (t1.id = t2.owner) left join t1 as t3 on t3.id=t2.owner; select t1.name, t2.name, t2.id,t3.id from t1 right join t2 on (t1.id = t2.owner) right join t1 as t3 on t3.id=t2.owner; select t1.name, t2.name, t2.id, t2.owner, t3.id from t1 left join t2 on (t1.id = t2.owner) right join t1 as t3 on t3.id=t2.owner; drop table t1,t2; create table t1 (id int not null, str char(10), index(str)); insert into t1 values (1, null), (2, null), (3, "foo"), (4, "bar"); select * from t1 where str is not null order by id; select * from t1 where str is null; drop table t1; # # Test wrong LEFT JOIN query # CREATE TABLE t1 ( t1_id bigint(21) NOT NULL auto_increment, PRIMARY KEY (t1_id) ); CREATE TABLE t2 ( t2_id bigint(21) NOT NULL auto_increment, PRIMARY KEY (t2_id) ); CREATE TABLE t3 ( t3_id bigint(21) NOT NULL auto_increment, PRIMARY KEY (t3_id) ); CREATE TABLE t4 ( seq_0_id bigint(21) DEFAULT '0' NOT NULL, seq_1_id bigint(21) DEFAULT '0' NOT NULL, KEY seq_0_id (seq_0_id), KEY seq_1_id (seq_1_id) ); CREATE TABLE t5 ( seq_0_id bigint(21) DEFAULT '0' NOT NULL, seq_1_id bigint(21) DEFAULT '0' NOT NULL, KEY seq_1_id (seq_1_id), KEY seq_0_id (seq_0_id) ); insert into t1 values (1); insert into t2 values (1); insert into t3 values (1); insert into t4 values (1,1); insert into t5 values (1,1); --error 1120 explain select * from t3 left join t4 on t4.seq_1_id = t2.t2_id left join t1 on t1.t1_id = t4.seq_0_id left join t5 on t5.seq_0_id = t1.t1_id left join t2 on t2.t2_id = t5.seq_1_id where t3.t3_id = 23; drop table t1,t2,t3,t4,t5; # # Another LEFT JOIN problem # (The problem was that the result changed when we added ORDER BY) # create table t1 (n int, m int, o int, key(n)); create table t2 (n int not null, m int, o int, primary key(n)); insert into t1 values (1, 2, 11), (1, 2, 7), (2, 2, 8), (1,2,9),(1,3,9); insert into t2 values (1, 2, 3),(2, 2, 8), (4,3,9),(3,2,10); select t1.*, t2.* from t1 left join t2 on t1.n = t2.n and t1.m = t2.m where t1.n = 1; select t1.*, t2.* from t1 left join t2 on t1.n = t2.n and t1.m = t2.m where t1.n = 1 order by t1.o; drop table t1,t2; # Test bug with NATURAL join: CREATE TABLE t1 (id1 INT NOT NULL PRIMARY KEY, dat1 CHAR(1), id2 INT); INSERT INTO t1 VALUES (1,'a',1); INSERT INTO t1 VALUES (2,'b',1); INSERT INTO t1 VALUES (3,'c',2); CREATE TABLE t2 (id2 INT NOT NULL PRIMARY KEY, dat2 CHAR(1)); INSERT INTO t2 VALUES (1,'x'); INSERT INTO t2 VALUES (2,'y'); INSERT INTO t2 VALUES (3,'z'); SELECT t2.id2 FROM t2 LEFT OUTER JOIN t1 ON t1.id2 = t2.id2 WHERE id1 IS NULL; SELECT t2.id2 FROM t2 NATURAL LEFT OUTER JOIN t1 WHERE id1 IS NULL; drop table t1,t2; create table t1 ( color varchar(20), name varchar(20) ); insert into t1 values ( 'red', 'apple' ); insert into t1 values ( 'yellow', 'banana' ); insert into t1 values ( 'green', 'lime' ); insert into t1 values ( 'black', 'grape' ); insert into t1 values ( 'blue', 'blueberry' ); create table t2 ( count int, color varchar(20) ); insert into t2 values (10, 'green'); insert into t2 values (5, 'black'); insert into t2 values (15, 'white'); insert into t2 values (7, 'green'); select * from t1; select * from t2; select * from t2 natural join t1; select t2.count, t1.name from t2 natural join t1; select t2.count, t1.name from t2 inner join t1 using (color); drop table t1; drop table t2; # # Test of LEFT JOIN + GROUP FUNCTIONS within functions: # CREATE TABLE t1 ( pcode varchar(8) DEFAULT '' NOT NULL ); INSERT INTO t1 VALUES ('kvw2000'),('kvw2001'),('kvw3000'),('kvw3001'),('kvw3002'),('kvw3500'),('kvw3501'),('kvw3502'),('kvw3800'),('kvw3801'),('kvw3802'),('kvw3900'),('kvw3901'),('kvw3902'),('kvw4000'),('kvw4001'),('kvw4002'),('kvw4200'),('kvw4500'),('kvw5000'),('kvw5001'),('kvw5500'),('kvw5510'),('kvw5600'),('kvw5601'),('kvw6000'),('klw1000'),('klw1020'),('klw1500'),('klw2000'),('klw2001'),('klw2002'),('kld2000'),('klw2500'),('kmw1000'),('kmw1500'),('kmw2000'),('kmw2001'),('kmw2100'),('kmw3000'),('kmw3200'); CREATE TABLE t2 ( pcode varchar(8) DEFAULT '' NOT NULL, KEY pcode (pcode) ); INSERT INTO t2 VALUES ('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw2000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3000'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw3500'),('kvw6000'),('kvw6000'),('kld2000'); SELECT t1.pcode, IF(ISNULL(t2.pcode), 0, COUNT(*)) AS count FROM t1 LEFT JOIN t2 ON t1.pcode = t2.pcode GROUP BY t1.pcode; SELECT SQL_BIG_RESULT t1.pcode, IF(ISNULL(t2.pcode), 0, COUNT(*)) AS count FROM t1 LEFT JOIN t2 ON t1.pcode = t2.pcode GROUP BY t1.pcode; drop table t1,t2; # # Another left join problem # CREATE TABLE t1 ( id int(11), pid int(11), rep_del tinyint(4), KEY id (id), KEY pid (pid) ); INSERT INTO t1 VALUES (1,NULL,NULL); INSERT INTO t1 VALUES (2,1,NULL); select * from t1 LEFT JOIN t1 t2 ON (t1.id=t2.pid) AND t2.rep_del IS NULL; create index rep_del ON t1(rep_del); select * from t1 LEFT JOIN t1 t2 ON (t1.id=t2.pid) AND t2.rep_del IS NULL; drop table t1; CREATE TABLE t1 ( id int(11) DEFAULT '0' NOT NULL, name tinytext DEFAULT '' NOT NULL, UNIQUE id (id) ); INSERT INTO t1 VALUES (1,'yes'),(2,'no'); CREATE TABLE t2 ( id int(11) DEFAULT '0' NOT NULL, idx int(11) DEFAULT '0' NOT NULL, UNIQUE id (id,idx) ); INSERT INTO t2 VALUES (1,1); explain SELECT * from t1 left join t2 on t1.id=t2.id where t2.id IS NULL; SELECT * from t1 left join t2 on t1.id=t2.id where t2.id IS NULL; drop table t1,t2; # # Test problem with using key_column= constant in ON and WHERE # create table t1 (bug_id mediumint, reporter mediumint); create table t2 (bug_id mediumint, who mediumint, index(who)); insert into t2 values (1,1),(1,2); insert into t1 values (1,1),(2,1); SELECT * FROM t1 LEFT JOIN t2 ON (t1.bug_id = t2.bug_id AND t2.who = 2) WHERE (t1.reporter = 2 OR t2.who = 2); drop table t1,t2; # # Test problem with LEFT JOIN create table t1 (fooID smallint unsigned auto_increment, primary key (fooID)); create table t2 (fooID smallint unsigned not null, barID smallint unsigned not null, primary key (fooID,barID)); insert into t1 (fooID) values (10),(20),(30); insert into t2 values (10,1),(20,2),(30,3); explain select * from t2 left join t1 on t1.fooID = t2.fooID and t1.fooID = 30; select * from t2 left join t1 on t1.fooID = t2.fooID and t1.fooID = 30; select * from t2 left join t1 ignore index(primary) on t1.fooID = t2.fooID and t1.fooID = 30; drop table t1,t2; create table t1 (i int); create table t2 (i int); create table t3 (i int); insert into t1 values(1),(2); insert into t2 values(2),(3); insert into t3 values(2),(4); select * from t1 natural left join t2 natural left join t3; select * from t1 natural left join t2 where (t2.i is not null)=0; select * from t1 natural left join t2 where (t2.i is not null) is not null; drop table t1,t2,t3; # # Test of USING # create table t1 (f1 integer,f2 integer,f3 integer); create table t2 (f2 integer,f4 integer); create table t3 (f3 integer,f5 integer); --error 1054 select * from t1 left outer join t2 using (f2) left outer join t3 using (f3); drop table t1,t2,t3; create table t1 (a1 int, a2 int); create table t2 (b1 int not null, b2 int); create table t3 (c1 int, c2 int); insert into t1 values (1,2), (2,2), (3,2); insert into t2 values (1,3), (2,3); insert into t3 values (2,4), (3,4); select * from t1 left join t2 on b1 = a1 left join t3 on c1 = a1 and b1 is null; explain select * from t1 left join t2 on b1 = a1 left join t3 on c1 = a1 and b1 is null; drop table t1, t2, t3; # Test for BUG#8711 '<=>' was considered to be a NULL-rejecting predicate. create table t1 ( a int(11), b char(10), key (a) ); insert into t1 (a) values (1),(2),(3),(4); create table t2 (a int); select * from t1 left join t2 on t1.a=t2.a where not (t2.a <=> t1.a); select * from t1 left join t2 on t1.a=t2.a having not (t2.a <=> t1.a); drop table t1,t2; # Test for BUG#5088 create table t1 ( match_id tinyint(3) unsigned not null auto_increment, home tinyint(3) unsigned default '0', unique key match_id (match_id), key match_id_2 (match_id) ); insert into t1 values("1", "2"); create table t2 ( player_id tinyint(3) unsigned default '0', match_1_h tinyint(3) unsigned default '0', key player_id (player_id) ); insert into t2 values("1", "5"); insert into t2 values("2", "9"); insert into t2 values("3", "3"); insert into t2 values("4", "7"); insert into t2 values("5", "6"); insert into t2 values("6", "8"); insert into t2 values("7", "4"); insert into t2 values("8", "12"); insert into t2 values("9", "11"); insert into t2 values("10", "10"); explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from (t2 s left join t1 m on m.match_id = 1) order by m.match_id desc; explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from (t2 s left join t1 m on m.match_id = 1) order by UUX desc; select s.*, '*', m.*, (s.match_1_h - m.home) UUX from (t2 s left join t1 m on m.match_id = 1) order by UUX desc; explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from t2 s straight_join t1 m where m.match_id = 1 order by UUX desc; select s.*, '*', m.*, (s.match_1_h - m.home) UUX from t2 s straight_join t1 m where m.match_id = 1 order by UUX desc; drop table t1, t2; # Tests for bugs #6307 and 6460 create table t1 (a int, b int, unique index idx (a, b)); create table t2 (a int, b int, c int, unique index idx (a, b)); insert into t1 values (1, 10), (1,11), (2,10), (2,11); insert into t2 values (1,10,3); select t1.a, t1.b, t2.c from t1 left join t2 on t1.a=t2.a and t1.b=t2.b and t2.c=3 where t1.a=1 and t2.c is null; drop table t1, t2; CREATE TABLE t1 ( ts_id bigint(20) default NULL, inst_id tinyint(4) default NULL, flag_name varchar(64) default NULL, flag_value text, UNIQUE KEY ts_id (ts_id,inst_id,flag_name) ) ENGINE=MyISAM DEFAULT CHARSET=utf8; CREATE TABLE t2 ( ts_id bigint(20) default NULL, inst_id tinyint(4) default NULL, flag_name varchar(64) default NULL, flag_value text, UNIQUE KEY ts_id (ts_id,inst_id,flag_name) ) ENGINE=MyISAM DEFAULT CHARSET=utf8; INSERT INTO t1 VALUES (111056548820001, 0, 'flag1', NULL), (111056548820001, 0, 'flag2', NULL), (2, 0, 'other_flag', NULL); INSERT INTO t2 VALUES (111056548820001, 3, 'flag1', 'sss'); SELECT t1.flag_name,t2.flag_value FROM t1 LEFT JOIN t2 ON (t1.ts_id = t2.ts_id AND t1.flag_name = t2.flag_name AND t2.inst_id = 3) WHERE t1.inst_id = 0 AND t1.ts_id=111056548820001 AND t2.flag_value IS NULL; DROP TABLE t1,t2; CREATE TABLE t1 ( id int(11) unsigned NOT NULL auto_increment, text_id int(10) unsigned default NULL, PRIMARY KEY (id) ); INSERT INTO t1 VALUES("1", "0"); INSERT INTO t1 VALUES("2", "10"); CREATE TABLE t2 ( text_id char(3) NOT NULL default '', language_id char(3) NOT NULL default '', text_data text, PRIMARY KEY (text_id,language_id) ); INSERT INTO t2 VALUES("0", "EN", "0-EN"); INSERT INTO t2 VALUES("0", "SV", "0-SV"); INSERT INTO t2 VALUES("10", "EN", "10-EN"); INSERT INTO t2 VALUES("10", "SV", "10-SV"); SELECT t1.id, t1.text_id, t2.text_data FROM t1 LEFT JOIN t2 ON t1.text_id = t2.text_id AND t2.language_id = 'SV' WHERE (t1.id LIKE '%' OR t2.text_data LIKE '%'); DROP TABLE t1, t2; # Test for bug #5896 CREATE TABLE t0 (a0 int PRIMARY KEY); CREATE TABLE t1 (a1 int PRIMARY KEY); CREATE TABLE t2 (a2 int); CREATE TABLE t3 (a3 int); INSERT INTO t0 VALUES (1); INSERT INTO t1 VALUES (1); INSERT INTO t2 VALUES (1), (2); INSERT INTO t3 VALUES (1), (2); SELECT * FROM t1 LEFT JOIN t2 ON a1=0; EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON a1=0; SELECT * FROM t1 LEFT JOIN (t2,t3) ON a1=0; EXPLAIN SELECT * FROM t1 LEFT JOIN (t2,t3) ON a1=0; SELECT * FROM t0, t1 LEFT JOIN (t2,t3) ON a1=0 WHERE a0=a1; EXPLAIN SELECT * FROM t0, t1 LEFT JOIN (t2,t3) ON a1=0 WHERE a0=a1; INSERT INTO t0 VALUES (0); INSERT INTO t1 VALUES (0); SELECT * FROM t0, t1 LEFT JOIN (t2,t3) ON a1=5 WHERE a0=a1 AND a0=1; EXPLAIN SELECT * FROM t0, t1 LEFT JOIN (t2,t3) ON a1=5 WHERE a0=a1 AND a0=1; # Test for BUG#4480 drop table t1,t2; create table t1 (a int, b int); insert into t1 values (1,1),(2,2),(3,3); create table t2 (a int, b int); insert into t2 values (1,1), (2,2); select * from t2 right join t1 on t2.a=t1.a; select straight_join * from t2 right join t1 on t2.a=t1.a; DROP TABLE t0,t1,t2,t3; # # Test for bug #9017: left join mistakingly converted to inner join # CREATE TABLE t1 (a int PRIMARY KEY, b int); CREATE TABLE t2 (a int PRIMARY KEY, b int); INSERT INTO t1 VALUES (1,1), (2,1), (3,1), (4,2); INSERT INTO t2 VALUES (1,2), (2,2); SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a; SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t1.b=1; SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t1.b=1 XOR (NOT ISNULL(t2.a) AND t2.b=1); SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE not(0+(t1.a=30 and t2.b=1)); DROP TABLE t1,t2; # Bug #8681: Bad warning message when group_concat() exceeds max length set group_concat_max_len=5; create table t1 (a int, b varchar(20)); create table t2 (a int, c varchar(20)); insert into t1 values (1,"aaaaaaaaaa"),(2,"bbbbbbbbbb"); insert into t2 values (1,"cccccccccc"),(2,"dddddddddd"); select group_concat(t1.b,t2.c) from t1 left join t2 using(a) group by t1.a; select group_concat(t1.b,t2.c) from t1 inner join t2 using(a) group by t1.a; drop table t1, t2; set group_concat_max_len=default;