path: root/mysql-test/t/union.test

#
# Test of unions
#

--disable_warnings
drop table if exists t1,t2,t3,t4,t5,t6;
--enable_warnings

CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');
CREATE TABLE t2 (a int not null, b char (10) not null);
insert into t2 values (3,'c'),(4,'d'),(5,'f'),(6,'e');

select a,b from t1 union select a,b from t2;
select a,b from t1 union all select a,b from t2;
select a,b from t1 union all select a,b from t2 order by b;
select a,b from t1 union all select a,b from t2 union select 7,'g';
select 0,'#' union select a,b from t1 union all select a,b from t2 union select 7,'gg';
select a,b from t1 union select a,b from t1;
select 't1',b,count(*) from t1 group by b UNION select 't2',b,count(*) from t2 group by b;

# Test alternate syntax for unions 
(select a,b from t1 limit 2)  union all (select a,b from t2 order by a) limit 4;
(select a,b from t1 limit 2)  union all (select a,b from t2 order by a limit 1);
(select a,b from t1 limit 2)  union all (select a,b from t2 order by a limit 1) order by b desc;
--error 1249
(select a,b from t1 limit 2)  union all (select a,b from t2 order by a limit 1) order by t1.b;
explain (select a,b from t1 limit 2)  union all (select a,b from t2 order by a limit 1) order by b desc;
(select sql_calc_found_rows  a,b from t1 limit 2)  union all (select a,b from t2 order by a) limit 2;
select found_rows();
select sql_calc_found_rows  a,b from t1  union all select a,b from t2 limit 2;
select found_rows();

#
# Test some error conditions with UNION
#

explain select a,b from t1 union all select a,b from t2;

--error  1054
explain select xx from t1 union select 1;
explain select a,b from t1 union select 1;
explain select 1 union select a,b from t1 union select 1;
explain select a,b from t1 union select 1 limit 0;

--error 1221
select a,b from t1 into outfile 'skr' union select a,b from t2;

--error 1221
select a,b from t1 order by a union select a,b from t2;

--error 1221
insert into t3 select a from t1 order by a union select a from t2;

--error 1222
create table t3 select a,b from t1 union select a from t2;

--error 1222
select a,b from t1 union select a from t2;

--error 1222
select * from t1 union select a from t2;

--error 1222
select a from t1 union select * from t2;

--error 1234
select * from t1 union select SQL_BUFFER_RESULT * from t2;

# Test CREATE, INSERT and REPLACE
create table t3 select a,b from t1 union all select a,b from t2;
insert into t3 select a,b from t1 union all select a,b from t2;
replace into t3 select a,b as c from t1 union all select a,b from t2;

drop table t1,t2,t3;

#
# Test some unions without tables
#
--error 1096
select * union select 1;
select 1 as a,(select a union select a);
--error 1054
(select 1) union (select 2) order by 0;
SELECT @a:=1 UNION SELECT @a:=@a+1;
--error 1054
(SELECT 1) UNION (SELECT 2) ORDER BY (SELECT a);
(SELECT 1,3) UNION (SELECT 2,1) ORDER BY (SELECT 2);

#
# Test bug reported by joc@presence-pc.com
#

CREATE TABLE t1 (
  `pseudo` char(35) NOT NULL default '',
  `pseudo1` char(35) NOT NULL default '',
  `same` tinyint(1) unsigned NOT NULL default '1',
  PRIMARY KEY  (`pseudo1`),
  KEY `pseudo` (`pseudo`)
) TYPE=MyISAM;
INSERT INTO t1 (pseudo,pseudo1,same) VALUES ('joce', 'testtt', 1),('joce', 'tsestset', 1),('dekad', 'joce', 1);
SELECT pseudo FROM t1 WHERE pseudo1='joce' UNION SELECT pseudo FROM t1 WHERE pseudo='joce';
SELECT pseudo1 FROM t1 WHERE pseudo1='joce' UNION SELECT pseudo1 FROM t1 WHERE pseudo='joce';
SELECT * FROM t1 WHERE pseudo1='joce' UNION SELECT * FROM t1 WHERE pseudo='joce' order by pseudo desc,pseudo1 desc;
SELECT pseudo1 FROM t1 WHERE pseudo='joce' UNION SELECT pseudo FROM t1 WHERE pseudo1='joce';
SELECT pseudo1 FROM t1 WHERE pseudo='joce' UNION ALL SELECT pseudo FROM t1 WHERE pseudo1='joce';
SELECT pseudo1 FROM t1 WHERE pseudo='joce' UNION SELECT 1;
drop table t1;

create table t1 (a int);
create table t2 (a int);
insert into t1 values (1),(2),(3),(4),(5);
insert into t2 values (11),(12),(13),(14),(15);
(select * from t1 limit 2) union (select * from t2 limit 3) limit 4;
(select * from t1 limit 2) union (select * from t2 limit 3);
(select * from t1 limit 2) union (select * from t2 limit 20,3);
set SQL_SELECT_LIMIT=2;
(select * from t1 limit 1) union (select * from t2 limit 3);
set SQL_SELECT_LIMIT=DEFAULT;
drop table t1,t2;

#
# Test error with left join
#

CREATE TABLE t1 (
  cid smallint(5) unsigned NOT NULL default '0',
  cv varchar(250) NOT NULL default '',
  PRIMARY KEY  (cid),
  UNIQUE KEY cv (cv)
) ;
INSERT INTO t1 VALUES (8,'dummy');
CREATE TABLE t2 (
  cid bigint(20) unsigned NOT NULL auto_increment,
  cap varchar(255) NOT NULL default '',
  PRIMARY KEY  (cid),
  KEY cap (cap)
) ;
CREATE TABLE t3 (
  gid bigint(20) unsigned NOT NULL auto_increment,
  gn varchar(255) NOT NULL default '',
  must tinyint(4) default NULL,
  PRIMARY KEY  (gid),
  KEY gn (gn)
) ;
INSERT INTO t3 VALUES (1,'V1',NULL);
CREATE TABLE t4 (
  uid bigint(20) unsigned NOT NULL default '0',
  gid bigint(20) unsigned default NULL,
  rid bigint(20) unsigned default NULL,
  cid bigint(20) unsigned default NULL,
  UNIQUE KEY m (uid,gid,rid,cid),
  KEY uid (uid),
  KEY rid (rid),
  KEY cid (cid),
  KEY container (gid,rid,cid)
) ;
INSERT INTO t4 VALUES (1,1,NULL,NULL);
CREATE TABLE t5 (
  rid bigint(20) unsigned NOT NULL auto_increment,
  rl varchar(255) NOT NULL default '',
  PRIMARY KEY  (rid),
  KEY rl (rl)
) ;
CREATE TABLE t6 (
  uid bigint(20) unsigned NOT NULL auto_increment,
  un varchar(250) NOT NULL default '',
  uc smallint(5) unsigned NOT NULL default '0',
  PRIMARY KEY  (uid),
  UNIQUE KEY nc (un,uc),
  KEY un (un)
) ;
INSERT INTO t6 VALUES (1,'test',8);

SELECT t4.uid, t5.rl, t3.gn as g1, t4.cid, t4.gid as gg FROM t3, t6, t1, t4 left join t5 on t5.rid = t4.rid left join t2 on t2.cid = t4.cid WHERE t3.gid=t4.gid AND t6.uid = t4.uid AND t6.uc  = t1.cid AND t1.cv = "dummy" AND t6.un = "test";
SELECT t4.uid, t5.rl, t3.gn as g1, t4.cid, t4.gid as gg FROM t3, t6, t1, t4 left join t5 on t5.rid = t4.rid left join t2 on t2.cid = t4.cid WHERE t3.gid=t4.gid AND t6.uid = t4.uid AND t3.must IS NOT NULL AND t6.uc  = t1.cid AND t1.cv = "dummy" AND t6.un = "test";
(SELECT t4.uid, t5.rl, t3.gn as g1, t4.cid, t4.gid as gg FROM t3, t6, t1, t4 left join t5 on t5.rid = t4.rid left join t2 on t2.cid = t4.cid WHERE t3.gid=t4.gid AND t6.uid = t4.uid AND t3.must IS NOT NULL AND t6.uc  = t1.cid AND t1.cv = "dummy" AND t6.un = "test") UNION (SELECT t4.uid, t5.rl, t3.gn as g1, t4.cid, t4.gid as gg FROM t3, t6, t1, t4 left join t5 on t5.rid = t4.rid left join t2 on t2.cid = t4.cid WHERE t3.gid=t4.gid AND t6.uid = t4.uid AND t6.uc  = t1.cid AND t1.cv = "dummy" AND t6.un = "test");
drop table t1,t2,t3,t4,t5,t6;

#
# Test insert ... SELECT with UNION
#

CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');
CREATE TABLE t2 (a int not null, b char (10) not null);
insert into t2 values (3,'c'),(4,'d'),(5,'f'),(6,'e');
create table t3 select a,b from t1 union select a,b from t2;
create table t4 (select a,b from t1) union (select a,b from t2) limit 2;
insert into  t4 select a,b from t1 union select a,b from t2;
insert into  t3 (select a,b from t1) union (select a,b from t2) limit 2;
select * from t3;
select * from t4;
drop table t1,t2,t3,t4;

#
# Test of SQL_CALC_FOUND_ROW handling
#
create table t1 (a int);
insert into t1 values (1),(2),(3);
create table t2 (a int);
insert into t2 values (3),(4),(5);

# Test global limits
(SELECT SQL_CALC_FOUND_ROWS * FROM t1) UNION all (SELECT * FROM t2) LIMIT 1;
select found_rows();
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION all (SELECT * FROM t2) LIMIT 2;
select found_rows();

# Test cases where found_rows() should return number of returned rows
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION all (SELECT * FROM t2);
select found_rows();
(SELECT SQL_CALC_FOUND_ROWS * FROM t1) UNION all (SELECT * FROM t2 LIMIT 1);
select found_rows();
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION SELECT * FROM t2 LIMIT 1;
select found_rows();

# In these case found_rows() should work
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1 UNION all SELECT * FROM t2 LIMIT 2;
select found_rows();
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION all SELECT * FROM t2 LIMIT 2;
select found_rows();

# The following examples will not be exact
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 2;
select found_rows();
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 100;
select found_rows();
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 100 UNION SELECT * FROM t2;
select found_rows();
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1 UNION SELECT * FROM t2;
select found_rows();
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1 UNION SELECT * FROM t2 LIMIT 2;
select found_rows();
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 2,2;
select found_rows();
SELECT SQL_CALC_FOUND_ROWS * FROM t1 limit 2,2 UNION SELECT * FROM t2;
select found_rows();

# Test some limits with ORDER BY
SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY a desc LIMIT 1;
(SELECT * FROM t1 ORDER by a) UNION ALL (SELECT * FROM t2 ORDER BY a) ORDER BY A desc LIMIT 4;

# Wrong usage
--error 1234
(SELECT * FROM t1) UNION all (SELECT SQL_CALC_FOUND_ROWS * FROM t2) LIMIT 1;

drop table t1,t2;

#
# Test for another bug with UNION and LEFT JOIN
#
CREATE TABLE t1 (  id int(3) unsigned default '0') TYPE=MyISAM;
INSERT INTO t1 (id) VALUES("1");
CREATE TABLE t2 ( id int(3) unsigned default '0',  id_master int(5) default '0',  text1 varchar(5) default NULL,  text2 varchar(5) default NULL) TYPE=MyISAM;
INSERT INTO t2 (id, id_master, text1, text2) VALUES("1", "1",
"foo1", "bar1");
INSERT INTO t2 (id, id_master, text1, text2) VALUES("2", "1",
"foo2", "bar2");
INSERT INTO t2 (id, id_master, text1, text2) VALUES("3", "1", NULL,
"bar3");
INSERT INTO t2 (id, id_master, text1, text2) VALUES("4", "1",
"foo4", "bar4");
SELECT 1 AS id_master, 1 AS id, NULL AS text1, 'ABCDE' AS text2 UNION SELECT id_master, t2.id, text1, text2 FROM t1 LEFT JOIN t2 ON t1.id = t2.id_master;
SELECT 1 AS id_master, 1 AS id, 'ABCDE' AS text1, 'ABCDE' AS text2 UNION SELECT id_master, t2.id, text1, text2 FROM t1 LEFT JOIN t2 ON t1.id = t2.id_master;
drop table if exists t1,t2;

#
# Test of bug when using the same table multiple times
#
create table t1 (a int not null primary key auto_increment, b int, key(b));
create table t2 (a int not null primary key auto_increment, b int);
insert into t1 (b) values (1),(2),(2),(3);
insert into t2 (b) values (10),(11),(12),(13);

explain (select * from t1 where a=1) union (select * from t2 where a=1);
(select * from t1 where a=5) union (select * from t2 where a=1);
(select * from t1 where a=5 and a=6) union (select * from t2 where a=1);
(select t1.a,t1.b from t1,t2 where t1.a=5) union (select * from t2 where a=1);
(select * from t1 where a=1) union (select t1.a,t2.a from t1,t2 where t1.a=t2.a);
explain (select * from t1 where a=1 and b=10) union (select t1.a,t2.a from t1,t2 where t1.a=t2.a);
explain (select * from t1 where a=1) union (select * from t1 where b=1);
drop table t1,t2;
create table t1 (   id int not null auto_increment, primary key (id)   ,user_name text );
create table t2 (    id int not null auto_increment, primary key (id)   ,group_name text );
create table t3 (    id int not null auto_increment, primary key (id)   ,user_id int   ,index user_idx (user_id)   ,foreign key (user_id) references users(id)   ,group_id int   ,index group_idx (group_id)   ,foreign key (group_id) references groups(id) );
insert into t1 (user_name) values ('Tester');
insert into t2 (group_name) values ('Group A');
insert into t2 (group_name) values ('Group B');
insert into t3 (user_id, group_id) values (1,1);
select 1 'is_in_group', a.user_name, c.group_name, b.id from t1 a, t3 b, t2 c where a.id = b.user_id and b.group_id = c.id UNION  select 0 'is_in_group', a.user_name, c.group_name, null from t1 a, t2 c;
drop table t1, t2, t3;