#
# Test of unions
#

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 distinct 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 ER_TABLENAME_NOT_ALLOWED_HERE
(select a,b from t1 limit 2)  union all (select a,b from t2 order by a limit 1) order by t1.b;
explain extended (select a,b from t1 limit 2)  union all (select a,b from t2 order by a limit 1) order by b desc;
--disable_view_protocol
select count(*) from (
(select                      a,b from t1 limit 2)  union all (select a,b from t2 order by a)) q;
(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 count(*) from (
select                      a,b from t1  union all select a,b from t2) q;
select sql_calc_found_rows  a,b from t1  union all select a,b from t2 limit 2;
select found_rows();
--enable_view_protocol
#
# Test some error conditions with UNION
#

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

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

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

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

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

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

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

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

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

--error ER_CANT_USE_OPTION_HERE
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;
# PS can't handle REPLACE ... SELECT
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 ER_NO_TABLES_USED
select * union select 1;
select 1 as a,(select a union select a);
--error ER_BAD_FIELD_ERROR
(select 1) union (select 2) order by 0;
SELECT @a:=1 UNION SELECT @a:=@a+1;
--error ER_BAD_FIELD_ERROR
(SELECT 1) UNION (SELECT 2) ORDER BY (SELECT a);
--sorted_result
(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`)
) ENGINE=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);

--disable_view_protocol
# Test global limits
SELECT COUNT(*) FROM (
(SELECT                     * FROM t1) UNION all (SELECT * FROM t2)) q;
(SELECT SQL_CALC_FOUND_ROWS * FROM t1) UNION all (SELECT * FROM t2) LIMIT 1;
select found_rows();
SELECT COUNT(*) FROM (
(SELECT                     * FROM t1 LIMIT 1) UNION all (SELECT * FROM t2)) q;
(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 COUNT(*) FROM (
(SELECT                     * FROM t1 LIMIT 1) UNION all (SELECT * FROM t2)) q;
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION all (SELECT * FROM t2);
select found_rows();
SELECT COUNT(*) FROM (
(SELECT                     * FROM t1) UNION all (SELECT * FROM t2 LIMIT 1)) q;
(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();
SELECT COUNT(*) FROM (
(SELECT                     * FROM t1 LIMIT 1) UNION SELECT * FROM t2) q;
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION SELECT * FROM t2 LIMIT 1;
select found_rows();
--enable_view_protocol

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

# The following examples will not be exact
SELECT COUNT(*) FROM (
SELECT                     * FROM t1 UNION SELECT * FROM t2) q;
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 2;
SELECT COUNT(*) FROM (
(SELECT                     * FROM t1 LIMIT 1) UNION all SELECT * FROM t2) q;
--disable_view_protocol
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION all SELECT * FROM t2 LIMIT 2;
select found_rows();
--enable_view_protocol
SELECT COUNT(*) FROM (
SELECT                     * FROM t1 UNION all SELECT * FROM t2) q;
--disable_view_protocol
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 100;
select found_rows();
--enable_view_protocol
--error ER_PARSE_ERROR
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 100 UNION SELECT * FROM t2;
SELECT COUNT(*) FROM (
(SELECT                     * FROM t1 LIMIT 100) UNION SELECT * FROM t2) q;
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 100) UNION SELECT * FROM t2;
--error ER_PARSE_ERROR
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1 UNION SELECT * FROM t2;
SELECT COUNT(*) FROM (
(SELECT                     * FROM t1 LIMIT 1) UNION SELECT * FROM t2) q;
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION SELECT * FROM t2;
--error ER_PARSE_ERROR
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1 UNION SELECT * FROM t2 LIMIT 2;
SELECT COUNT(*) FROM (
(SELECT                     * FROM t1 LIMIT 1) UNION SELECT * FROM t2) q;
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION SELECT * FROM t2 LIMIT 2;
--disable_view_protocol
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 2,2;
select found_rows();
--enable_view_protocol
SELECT COUNT(*) FROM (
SELECT                     * FROM t1 UNION SELECT * FROM t2) q;
--error ER_PARSE_ERROR
SELECT SQL_CALC_FOUND_ROWS * FROM t1 limit 2,2 UNION SELECT * FROM t2;
SELECT COUNT(*) FROM (
(SELECT                     * FROM t1 limit 2,2) UNION SELECT * FROM t2) q;
(SELECT SQL_CALC_FOUND_ROWS * FROM t1 limit 2,2) UNION SELECT * FROM t2;

# 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 ER_CANT_USE_OPTION_HERE
(SELECT * FROM t1) UNION all (SELECT SQL_CALC_FOUND_ROWS * FROM t2) LIMIT 1;

create temporary table t1 select a from t1 union select a from t2;
drop temporary table t1;
--error ER_TABLE_EXISTS_ERROR
create table t1 select a from t1 union select a from t2;
--error ER_TABLENAME_NOT_ALLOWED_HERE
select a from t1 union select a from t2 order by t2.a;
drop table t1,t2;

#
# Problem with alias '*' (BUG #1249)
#

select length(version()) > 1 as `*` UNION select 2;

#
# Bug #4980: problem with explain
#

create table t1 (a int);
insert into t1 values (0), (3), (1), (2);
explain (select * from t1) union (select * from t1) order by a;
drop table t1;
#
# Test for another bug with UNION and LEFT JOIN
#
CREATE TABLE t1 (  id int(3) unsigned default '0') ENGINE=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) ENGINE=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 extended (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);

set @save_optimizer_use_condition_selectivity=@@optimizer_use_condition_selectivity,@save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch='outer_join_with_cache=off',@@optimizer_use_condition_selectivity=4;
explain (select * from t1 where a=1 and b=10) union (select straight_join t1.a,t2.a from t1,t2 where t1.a=t2.a);
set @@optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity,@@optimizer_switch=@save_optimizer_switch;

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;

#
# fix_fields problem
#
create table t1 (mat_id MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, matintnum CHAR(6) NOT NULL, test MEDIUMINT UNSIGNED NULL);
create table t2 (mat_id MEDIUMINT UNSIGNED NOT NULL, pla_id MEDIUMINT UNSIGNED NOT NULL);
insert into t1 values (NULL, 'a', 1), (NULL, 'b', 2), (NULL, 'c', 3), (NULL, 'd', 4), (NULL, 'e', 5), (NULL, 'f', 6), (NULL, 'g', 7), (NULL, 'h', 8), (NULL, 'i', 9);
insert into t2 values (1, 100), (1, 101), (1, 102), (2, 100), (2, 103), (2, 104), (3, 101), (3, 102), (3, 105);
SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id union SELECT 0, 0;
drop table t1, t2;

#
# types conversions
#
create table t1 SELECT "a" as a UNION select "aa" as a;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT 12 as a UNION select "aa" as a;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT 12 as a UNION select 12.2 as a;
select * from t1;
show create table t1;
drop table t1;

create table t2 (it1 tinyint, it2 tinyint not null, i int not null, ib bigint, f float, d double, y year, da date, dt datetime, sc char(10), sv varchar(10), b blob, tx text);
insert into t2 values (NULL, 1, 3, 4, 1.5, 2.5, 1972, '1972-10-22', '1972-10-22 11:50', 'testc', 'testv', 'tetetetetest', 'teeeeeeeeeeeest');

create table t1 SELECT it2 from t2 UNION select it1 from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT it2 from t2 UNION select i from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT i from t2 UNION select f from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT f from t2 UNION select d from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT ib from t2 UNION select f from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT ib from t2 UNION select d from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT f from t2 UNION select y from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT f from t2 UNION select da from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT y from t2 UNION select da from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT y from t2 UNION select dt from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT da from t2 UNION select dt from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT dt from t2 UNION select trim(sc) from t2;
select trim(dt) from t1;
show create table t1;
drop table t1;
create table t1 SELECT dt from t2 UNION select sv from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT sc from t2 UNION select sv from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT dt from t2 UNION select b from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT sv from t2 UNION select b from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT i from t2 UNION select d from t2 UNION select b from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT sv from t2 UNION select tx from t2;
select * from t1;
show create table t1;
drop table t1;
create table t1 SELECT b from t2 UNION select tx from t2;
select * from t1;
show create table t1;
drop table t1,t2;
create table t1 select 1 union select -1;
select * from t1;
show create table t1;
drop table t1;
-- error ER_CANT_AGGREGATE_2COLLATIONS
create table t1 select _latin1"test" union select _latin2"testt" ;
create table t1 select _latin2"test" union select _latin2"testt" ;
show create table t1;
drop table t1;

#
# conversion memory->disk table
#
create table t1 (s char(200));
insert into t1 values (repeat("1",200));
create table t2 select * from t1;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
set local tmp_table_size=1024;
select count(*) from (select * from t1 union all select * from t2 order by 1) b;
select count(*) from t1;
select count(*) from t2;
drop table t1,t2;
set local tmp_table_size=default;

#
# slow logging
#
create table t1 (a int, index (a), b int);
insert t1 values (1,1),(2,2),(3,3),(4,4),(5,5);
insert t1 select a+1, a+b from t1;
insert t1 select a+1, a+b from t1;
insert t1 select a+1, a+b from t1;
insert t1 select a+1, a+b from t1;
insert t1 select a+1, a+b from t1;
FLUSH STATUS;
--disable_view_protocol
show status like 'Slow_queries';
select count(*) from t1 where a=7;
show status like 'Slow_queries';
select count(*) from t1 where b=13;
show status like 'Slow_queries';
select count(*) from t1 where b=13 union select count(*) from t1 where a=7;
show status like 'Slow_queries';
select count(*) from t1 where a=7 union select count(*) from t1 where b=13;
show status like 'Slow_queries';
# additional test for examined rows
flush status;
select a from t1 where b not in (1,2,3) union select a from t1 where b not in (4,5,6); 
show status like 'Slow_queries';
--enable_view_protocol
drop table t1;

#
# Column 'name' cannot be null (error with union and left join) (bug #2508)
#
create table t1 (   RID int(11) not null default '0',   IID int(11) not null default '0',    nada varchar(50)  not null,NAME varchar(50) not null,PHONE varchar(50) not null) engine=MyISAM;
insert into t1 ( RID,IID,nada,NAME,PHONE) values (1, 1, 'main', 'a', '111'), (2, 1, 'main', 'b', '222'), (3, 1, 'main', 'c', '333'), (4, 1, 'main', 'd', '444'), (5, 1, 'main', 'e', '555'), (6, 2, 'main', 'c', '333'), (7, 2, 'main', 'd', '454'), (8, 2, 'main', 'e', '555'), (9, 2, 'main', 'f', '666'), (10, 2, 'main', 'g', '777');
SET @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch='outer_join_with_cache=off';
select A.NAME, A.PHONE, B.NAME, B.PHONE from t1 A left join t1 B on A.NAME = B.NAME and B.IID = 2 where A.IID = 1 and (A.PHONE <> B.PHONE or B.NAME is null) union select A.NAME, A.PHONE, B.NAME, B.PHONE from t1 B left join t1 A on B.NAME = A.NAME and A.IID = 1 where B.IID = 2 and (A.PHONE <> B.PHONE or A.NAME is null);
SET optimizer_switch=@save_optimizer_switch;
drop  table t1;

#
# Bug #2809 (UNION fails on MyIsam tables when index on second column from
# same table)
#
create table t1 (col1 tinyint unsigned, col2 tinyint unsigned);
insert into t1 values (1,2),(3,4),(5,6),(7,8),(9,10);
select col1 n from t1 union select col2 n from t1 order by n;
alter table t1 add index myindex (col2);
select col1 n from t1 union select col2 n from t1 order by n;
drop  table t1;

#
# Incorrect handling of UNION ALL (Bug #1428)
#
create table t1 (i int);
insert into t1 values (1);
select * from t1 UNION select * from t1;
select * from t1 UNION ALL select * from t1;
select * from t1 UNION select * from t1 UNION ALL select * from t1;
drop table t1;
select 1 as a union all select 1 union all select 2 union select 1 union all select 2;
set sql_select_limit=1;
select 1 union select 2;
(select 1) union (select 2);
(select 1) union (select 2) union (select 3) limit 2;
set sql_select_limit=default;

#
# ORDER with LIMIT
#
create table t1 (a int);
insert into t1 values (100), (1);
create table t2 (a int);
insert into t2 values (100);
select a from t1 union select a from t2 order by a;
SET SQL_SELECT_LIMIT=1;
select a from t1 union select a from t2 order by a;
drop table t1, t2;
set sql_select_limit=default;

#
# nonexisting column in global ORDER BY
#
CREATE TABLE t1 (i int(11) default NULL,c char(1) default NULL,KEY i (i));
CREATE TABLE t2 (i int(11) default NULL,c char(1) default NULL,KEY i (i));
--error ER_BAD_FIELD_ERROR
explain (select * from t1) union (select * from t2) order by not_existing_column;
drop table t1, t2;

#
# length detecting
#
CREATE TABLE t1 (uid int(1));
INSERT INTO t1 SELECT 150;
SELECT 'a' UNION SELECT uid FROM t1;
drop table t1;

#
# parser stack overflow
#
CREATE TABLE t1 ( ID1 int(10) unsigned NOT NULL DEFAULT '0' , ID2 datetime NOT NULL DEFAULT '0000-00-00 00:00:00' , DATA1 varchar(10) , DATA2 double(5,4) , DATA3 datetime , PRIMARY KEY (ID1,ID2));

CREATE TABLE t2 ( ID int(3) unsigned NOT NULL DEFAULT '0' , DATA1 timestamp DEFAULT '0000-00-00 00:00:00' , PRIMARY KEY (ID));
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1) UNION
(SELECT * FROM t1 AS PARTITIONED, t2 AS
PARTITIONED_B WHERE PARTITIONED_B.ID=PARTITIONED.ID1);
drop table t1,t2;

#
# merging ENUM and SET fields in one UNION
#
create table t1 (a ENUM('Yes', 'No') NOT NULL);
create table t2 (a ENUM('aaa', 'bbb') NOT NULL);
insert into t1 values ('No');
insert into t2 values ('bbb');
create table t3 (a SET('Yes', 'No') NOT NULL);
create table t4 (a SET('aaa', 'bbb') NOT NULL);
insert into t3 values (1);
insert into t4 values (3);
select "1" as a union select a from t1;
select a as a from t1 union select "1";
select a as a from t2 union select a from t1;
select "1" as a union select a from t3;
select a as a from t3 union select "1";
select a as a from t4 union select a from t3;
select a as a from t1 union select a from t4;
drop table t1,t2,t3,t4;

#
# Bug #6139 UNION doesn't understand collate in the column of second select
#
create table t1 as
(select _latin1'test') union
(select _latin1'TEST') union
(select _latin1'TeST');
show create table t1;
select count(*) from t1;
drop table t1;

create table t1 as
(select _latin1'test' collate latin1_bin) union
(select _latin1'TEST') union
(select _latin1'TeST');
show create table t1;
select count(*) from t1;
drop table t1;

create table t1 as
(select _latin1'test') union
(select _latin1'TEST' collate latin1_bin) union
(select _latin1'TeST');
show create table t1;
select count(*) from t1;
drop table t1;

create table t1 as
(select _latin1'test') union
(select _latin1'TEST') union
(select _latin1'TeST' collate latin1_bin);
show create table t1;
select count(*) from t1;
drop table t1;

create table t2 (
a char character set latin1 collate latin1_swedish_ci,
b char character set latin1 collate latin1_german1_ci);
--error ER_CANT_AGGREGATE_NCOLLATIONS
create table t1 as
(select a from t2) union
(select b from t2);
create table t1 as
(select a collate latin1_german1_ci from t2) union
(select b from t2);
show create table t1;
drop table t1;
create table t1 as
(select a from t2) union
(select b collate latin1_german1_ci from t2);
show create table t1;
drop table t1;
create table t1 as
(select a from t2) union
(select b from t2) union
(select 'c' collate latin1_german1_ci from t2);
show create table t1;
drop table t1;
drop table t2;

#
# Bug 6931: Date Type column problem when using UNION-Table.
#
create table t1(a1 int, f1 char(10));
create table t2
select f2,a1 from (select a1, CAST('2004-12-31' AS DATE) f2 from t1) a
union
select f2,a1 from (select a1, CAST('2004-12-31' AS DATE) f2 from t1) a
order by f2, a1;
show columns from t2;
drop table t1, t2;

create table t1 (f1 int);
create table t2 (f1 int, f2 int ,f3 date);
create table t3 (f1 int, f2 char(10));
create table t4
(
  select t2.f3 as sdate
  from t1
  left outer join t2 on (t1.f1 = t2.f1)
  inner join t3 on (t2.f2 = t3.f1)
  order by t1.f1, t3.f1, t2.f3
)
union
(
  select cast('2004-12-31' as date) as sdate
  from t1
  left outer join t2 on (t1.f1 = t2.f1)
  inner join t3 on (t2.f2 = t3.f1)
  group by t1.f1
  order by t1.f1, t3.f1, t2.f3
)
order by sdate;
show columns from t4;
drop table t1, t2, t3, t4;

#
# Bug #2435 UNION with parentheses not supported
#
create table t1 (a int not null, b char (10) not null); 
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c'); 
select * from ((select * from t1 limit 1)) a;
select * from ((select * from t1 limit 1) union (select * from t1 limit 1)) a;
select * from ((select * from t1 limit 1) union (select * from t1 limit 1) union (select * from t1 limit 1)) a;
select * from ((((select * from t1))) union (select * from t1) union (select * from t1)) a;
select * from ((select * from t1) union (((select * from t1))) union (select * from t1)) a;
drop table t1;

#
# Bugs#6519 UNION with collation binary and latin1_swedish_ci fails
#
set @val:=6;
select concat('value is: ', @val) union select 'some text';

#
# Bug#15949 union + illegal mix of collations (IMPLICIT + COERCIBLE)
#
select concat(_latin1'a', _ascii'b' collate ascii_bin);
create table t1 (foo varchar(100)) collate ascii_bin;
insert into t1 (foo) values ("foo");
select foo from t1 union select 'bar' as foo from dual;
drop table t1;

#
# Enum merging test
#
CREATE TABLE t1 (
  a ENUM('ä','ö','ü') character set utf8 not null default 'ü',
  b ENUM("one", "two") character set utf8,
  c ENUM("one", "two")
);
show create table t1;
insert into t1 values ('ä', 'one', 'one'), ('ö', 'two', 'one'), ('ü', NULL, NULL);
create table t2 select NULL union select a from t1;
show columns from t2;
drop table t2;
create table t2 select a from t1 union select NULL;
show columns from t2;
drop table t2;
create table t2 select a from t1 union select a from t1;
show columns from t2;
drop table t2;
create table t2 select a from t1 union select c from t1;
drop table t2;
create table t2 select a from t1 union select b from t1;
show columns from t2;
drop table t2, t1;

# 
# Bug #14216: UNION + DECIMAL wrong values in result
#
create table t1 (f1 decimal(60,25), f2 decimal(60,25));
insert into t1 values (0.0,0.0);
select f1 from t1 union all select f2 from t1;
select 'XXXXXXXXXXXXXXXXXXXX' as description, f1 from t1
union all
select 'YYYYYYYYYYYYYYYYYYYY' as description, f2 from t1;
drop table t1;
create table t1 (f1 decimal(60,24), f2 decimal(60,24));
insert into t1 values (0.0,0.0);
select f1 from t1 union all select f2 from t1;
select 'XXXXXXXXXXXXXXXXXXXX' as description, f1 from t1
union all
select 'YYYYYYYYYYYYYYYYYYYY' as description, f2 from t1;
drop table t1;

#
# Test that union with VARCHAR produces dynamic row tables
#

create table t1 (a varchar(5));
create table t2 select * from t1 union select 'abcdefghijkl';
show create table t2;
select row_format from information_schema.TABLES where table_schema="test" and table_name="t2";
alter table t2 ROW_FORMAT=fixed;
show create table t2;
drop table t1,t2;

#
# correct conversion long string to TEXT (BUG#10025)
#

CREATE TABLE t1 (a mediumtext);
CREATE TABLE t2 (b varchar(20));
INSERT INTO t1 VALUES ('a'),('b');
SELECT left(a,100000000) FROM t1 UNION  SELECT b FROM t2;
create table t3 SELECT left(a,100000000) FROM t1 UNION  SELECT b FROM t2;
show create table t3;
drop tables t1,t2,t3;

#
# Extended fix to Bug#10025 - the test above should result to mediumtext
# and the one below to longtext. Earlier above test resulted to longtext
# type also.
#

CREATE TABLE t1 (a longtext);
CREATE TABLE t2 (b varchar(20));
INSERT INTO t1 VALUES ('a'),('b');
SELECT left(a,100000000) FROM t1 UNION  SELECT b FROM t2;
create table t3 SELECT left(a,100000000) FROM t1 UNION  SELECT b FROM t2;
show create table t3;
drop tables t1,t2,t3;

#
# Testing here that mediumtext converts into longtext if the result
# exceeds mediumtext maximum length
#

SET @tmp_max= @@global.max_allowed_packet;
SET @@global.max_allowed_packet=25000000;
# switching connection to allow the new max_allowed_packet take effect
--connect (newconn, localhost, root,,)
CREATE TABLE t1 (a mediumtext);
CREATE TABLE t2 (b varchar(20));
INSERT INTO t1 VALUES ('a');
CREATE TABLE t3 SELECT REPEAT(a,20000000) AS a FROM t1 UNION SELECT b FROM t2;
SHOW CREATE TABLE t3;
DROP TABLES t1,t3;
CREATE TABLE t1 (a tinytext);
INSERT INTO t1 VALUES ('a');
CREATE TABLE t3 SELECT REPEAT(a,2) AS a FROM t1 UNION SELECT b FROM t2;
SHOW CREATE TABLE t3;
DROP TABLES t1,t3;
CREATE TABLE t1 (a mediumtext);
INSERT INTO t1 VALUES ('a');
CREATE TABLE t3 SELECT REPEAT(a,2) AS a FROM t1 UNION SELECT b FROM t2;
SHOW CREATE TABLE t3;
DROP TABLES t1,t3;
CREATE TABLE t1 (a tinyblob);
INSERT INTO t1 VALUES ('a');
CREATE TABLE t3 SELECT REPEAT(a,2) AS a FROM t1 UNION SELECT b FROM t2;
SHOW CREATE TABLE t3;
DROP TABLES t1,t2,t3;
--connection default
SET @@global.max_allowed_packet:= @tmp_max;
--disconnect newconn

#
# Bug #10032 Bug in parsing UNION with ORDER BY when one node does not use FROM
#

create table t1 ( id int not null auto_increment, primary key (id), col1 int);
insert into t1 (col1) values (2),(3),(4),(5),(6);
select 99 union all select id from t1 order by 1;
select id from t1 union all select 99 order by 1;
drop table t1;

# End of 4.1 tests

#
# Bug#12185: Data type aggregation may produce wrong result
#
create table t1(f1 char(1), f2 char(5), f3 binary(1), f4 binary(5), f5 timestamp NOT NULL DEFAULT '0000-00-00 00:00:00', f6 varchar(1) character set utf8 collate utf8_general_ci, f7 text);
create table t2 as select *, f6 as f8 from t1 union select *, f7 from t1;
show create table t2;
drop table t1, t2;

CREATE TABLE t1
(
  c_varchar varchar(1) character set utf8 collate utf8_general_ci,
  c_tinytext tinytext,
  c_text text,
  c_mediumtext mediumtext,
  c_longtext longtext
);
CREATE TABLE t2 AS
SELECT c_tinytext, c_text, c_mediumtext, c_longtext FROM t1
UNION
SELECT c_varchar, c_varchar, c_varchar, c_varchar FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
DROP TABLE t1;

#
# Bug#18175: Union select over 129 tables with a sum function fails.
#
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1)) union
(select avg(1)) union (select avg(1)) union (select avg(1));

#
# Bug #16881: password() and union select
# (The issue was poor handling of character set aggregation.)
#
select _utf8'12' union select _latin1'12345';

#
# Bug #26661: UNION with ORDER BY undefined column in FROM list
#

CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (3),(1),(2),(4),(1);

SELECT a FROM (SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a) AS test;
--error ER_BAD_FIELD_ERROR
SELECT a FROM (SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY c) AS test;

DROP TABLE t1;

#
# Bug#23345: Wrongly allowed INTO in a non-last select of a UNION.
# (fixed)
#
--error ER_PARSE_ERROR
(select 1 into @var) union (select 1);
--error ER_PARSE_ERROR
(select 1) union (select 1 into @var);
select @var;
--error ER_PARSE_ERROR
(select 2) union (select 1 into @var);
--enable_prepare_warnings
(select 1) union (select 1) into @var;
--disable_prepare_warnings
--error ER_TOO_MANY_ROWS
(select 2) union (select 1) into @var;

#
# Bug#27848: order-by of union clashes with rollup of select part
#

CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (10), (20);
CREATE TABLE t2 (b int);
INSERT INTO t2 VALUES (10), (50), (50);

SELECT a,1 FROM t1 
UNION
SELECT b, COUNT(*) FROM t2 GROUP BY b WITH ROLLUP
ORDER BY a;

SELECT a,1 FROM t1 
UNION
SELECT b, COUNT(*) FROM t2 GROUP BY b WITH ROLLUP
ORDER BY a DESC;

SELECT a,1 FROM t1 
UNION
SELECT b, COUNT(*) FROM t2 GROUP BY b WITH ROLLUP
ORDER BY a ASC LIMIT 3;

SELECT a,1 FROM t1 
UNION ALL 
SELECT b, COUNT(*) FROM t2 GROUP BY b WITH ROLLUP
ORDER BY a DESC;

--error ER_WRONG_USAGE
SELECT a,1 FROM t1
UNION 
(SELECT b, COUNT(*) FROM t2 GROUP BY b WITH ROLLUP ORDER BY a);

--error ER_PARSE_ERROR
SELECT a,1 FROM t1
UNION ALL
SELECT b, COUNT(*) FROM t2 GROUP BY b WITH ROLLUP ORDER BY a
UNION
SELECT 1,1;

DROP TABLE t1,t2;

# Bug#32848: Data type conversion bug in union subselects in MySQL 5.0.38
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1), (2), (3);

CREATE TABLE t2 SELECT * FROM (SELECT NULL) a UNION SELECT a FROM t1;
DESC t2;

CREATE TABLE t3 SELECT a FROM t1 UNION SELECT * FROM (SELECT NULL) a;
DESC t3;

CREATE TABLE t4 SELECT NULL;
DESC t4;

CREATE TABLE t5 SELECT NULL UNION SELECT NULL;
DESC t5;

CREATE TABLE t6 
SELECT * FROM (SELECT * FROM (SELECT NULL)a) b UNION SELECT a FROM t1;
DESC t6;

DROP TABLE t1, t2, t3, t4, t5, t6;

#
# Bug #43432: Union on floats does unnecessary rounding
#

CREATE TABLE t1 (f FLOAT(9,6));
CREATE TABLE t2 AS SELECT f FROM t1 UNION SELECT f FROM t1;
SHOW FIELDS FROM t2;
DROP TABLE t1, t2;

CREATE TABLE t1(d DOUBLE(9,6));
CREATE TABLE t2 AS SELECT d FROM t1 UNION SELECT d FROM t1;
SHOW FIELDS FROM t2;
DROP TABLE t1, t2;

#
# Bug#43612 crash with explain extended, union, order by
#
CREATE TABLE t1(a INT);
EXPLAIN EXTENDED
SELECT a FROM t1
UNION
SELECT a FROM t1
ORDER BY a;
DROP TABLE t1;


-- echo #
-- echo # Bug#32858: Error: "Incorrect usage of UNION and INTO" does not take 
-- echo # subselects into account
-- echo #
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1);

-- echo # Tests fix in parser rule select_derived_union.
SELECT a INTO @v FROM (
  SELECT a FROM t1
  UNION
  SELECT a FROM t1
) alias;

SELECT a INTO OUTFILE 'union.out.file' FROM (
  SELECT a FROM t1
  UNION
  SELECT a FROM t1 WHERE 0
) alias;

SELECT a INTO DUMPFILE 'union.out.file2' FROM (
  SELECT a FROM t1
  UNION
  SELECT a FROM t1 WHERE 0
) alias;

--error ER_PARSE_ERROR
SELECT a FROM t1 UNION SELECT a INTO @v FROM t1;
--error ER_PARSE_ERROR
SELECT a FROM t1 UNION SELECT a INTO OUTFILE 'union.out.file5' FROM t1;
--error ER_PARSE_ERROR
SELECT a FROM t1 UNION SELECT a INTO OUTFILE 'union.out.file6' FROM t1;
--enable_prepare_warnings
SELECT a FROM t1 UNION SELECT a FROM t1 INTO @v ;
SELECT a FROM t1 UNION SELECT a FROM t1 INTO OUTFILE 'union.out.file5';
SELECT a FROM t1 UNION SELECT a FROM t1 INTO OUTFILE 'union.out.file6';
--disable_prepare_warnings
--error ER_PARSE_ERROR
SELECT a INTO @v FROM t1 UNION SELECT a FROM t1;
--error ER_PARSE_ERROR
SELECT a INTO OUTFILE 'union.out.file7' FROM t1 UNION SELECT a FROM t1;
--error ER_PARSE_ERROR
SELECT a INTO DUMPFILE 'union.out.file8' FROM t1 UNION SELECT a FROM t1;

-- echo # Tests fix in parser rule query_expression_body.
SELECT ( SELECT a UNION SELECT a ) INTO @v FROM t1;
SELECT ( SELECT a UNION SELECT a ) INTO OUTFILE  'union.out.file3' FROM t1;
SELECT ( SELECT a UNION SELECT a ) INTO DUMPFILE 'union.out.file4' FROM t1;

DROP TABLE t1;
remove_files_wildcard $MYSQLTEST_VARDIR/mysqld.1/data/test union.out.fil*;

--echo # 
--echo # Bug #49734: Crash on EXPLAIN EXTENDED UNION ... ORDER BY 
--echo #   <any non-const-function>
--echo # 

CREATE TABLE t1 (a VARCHAR(10), FULLTEXT KEY a (a));
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (b INT);
INSERT INTO t2 VALUES (1),(2);

--echo # Should not crash
EXPLAIN EXTENDED
SELECT * FROM t1 UNION SELECT * FROM t1 ORDER BY a + 12;

--echo # Should not crash
SELECT * FROM t1 UNION SELECT * FROM t1 ORDER BY a + 12;


--echo # Should not crash
EXPLAIN EXTENDED
SELECT * FROM t1 UNION SELECT * FROM t1
  ORDER BY MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE);

--echo # Should not crash
--sorted_result
SELECT * FROM t1 UNION SELECT * FROM t1
  ORDER BY MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE);

--echo # Should not crash
--sorted_result
(SELECT * FROM t1) UNION (SELECT * FROM t1)
  ORDER BY MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE);


--echo # Should not crash
EXPLAIN EXTENDED
SELECT * FROM t1 UNION SELECT * FROM t1
  ORDER BY (SELECT a FROM t2 WHERE b = 12);

--echo # Should not crash
--disable_result_log
SELECT * FROM t1 UNION SELECT * FROM t1
  ORDER BY (SELECT a FROM t2 WHERE b = 12);
--enable_result_log

--echo # Should not crash
SELECT * FROM t2 UNION SELECT * FROM t2
  ORDER BY (SELECT * FROM t1 WHERE MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE));

DROP TABLE t1,t2;

#
# lp:732124 union + limit returns wrong result
#
create table t1 (a int);
insert into t1 values (10),(10),(10),(2),(3),(4),(5),(6),(7),(8),(9),(1),(10);
--sorted_result
select a from t1 where false UNION select a from t1 limit 8;
--sorted_result
(select a from t1 where false) UNION (select a from t1) limit 8;
drop table t1;

--echo #
--echo # Bug#11765255 58201:
--echo # VALGRIND/CRASH WHEN ORDERING BY MULTIPLE AGGREGATE FUNCTIONS
--echo #

let $my_stmt=
select 1 as foo
union
select 2
union
select 3
union
select 4
order by max(42) + max(1) + max(1) + max(1) + max(1) + max(1)
;

--error ER_AGGREGATE_ORDER_FOR_UNION
eval $my_stmt;

--error ER_AGGREGATE_ORDER_FOR_UNION
eval prepare stmt1 from '$my_stmt';

let $my_stmt=
select 1 as foo
union
select 2
union
select 3
union
(select 4)
order by max(42) + max(1) + max(1) + max(1) + max(1) + max(1)
;

--error ER_AGGREGATE_ORDER_FOR_UNION
eval $my_stmt;

--error ER_AGGREGATE_ORDER_FOR_UNION
eval prepare stmt1 from '$my_stmt';

--echo End of 5.1 tests

--echo #
--echo # mdev-5091: Asseirtion failure for UNION with ORDER BY 
--echo #            in one of selects
--echo #
 
 CREATE TABLE t1 (i int, c char(1)) ENGINE=MyISAM;
 INSERT INTO t1 VALUES (6,'b');

 CREATE VIEW v1 AS SELECT * FROM t1;

 ( SELECT i FROM v1 GROUP BY i ORDER BY CONCAT( c, c ) LIMIT 1 )
 UNION 
 ( SELECT i FROM t1 );

 DROP VIEW v1;
 DROP TABLE t1;

--echo #
--echo # mdev-5382:  UNION with ORDER BY in subselect
--echo #
 
 CREATE TABLE t1 (a int DEFAULT NULL);
 INSERT INTO t1 VALUES (2), (4);
 CREATE TABLE t2 (b int DEFAULT NULL);
 INSERT INTO t2 VALUES (1), (3);
 
 SELECT c1 FROM (SELECT (SELECT a FROM t1 WHERE t1.a <= t2.b
                         UNION ALL
                         SELECT a FROM t1 WHERE t1.a+3<= t2.b
                         ORDER BY a DESC) AS c1 FROM t2) t3;

 DROP TABLE t1,t2;
 
 --echo End of 5.3 tests

--echo #
--echo # Bug#57986 ORDER BY clause is not used after a UNION, 
--echo #           if embedded in a SELECT
--echo #

CREATE TABLE t1 (c1 VARCHAR(10) NOT NULL, c2 INT NOT NULL);
CREATE TABLE t2 (c1 VARCHAR(10) NOT NULL, c2 INT NOT NULL);


INSERT INTO t1 (c1, c2) VALUES ('t1a', 1), ('t1a', 2), ('t1a', 3), ('t1b', 2), ('t1b', 1);
INSERT INTO t2 (c1, c2) VALUES ('t2a', 1), ('t2a', 2), ('t2a', 3), ('t2b', 2), ('t2b', 1);

SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY c2, c1;
SELECT * FROM t1 UNION (SELECT * FROM t2) ORDER BY c2, c1;
SELECT * FROM t1 UNION (SELECT * FROM t2 ORDER BY c2, c1);

SELECT c1, c2 FROM (
  SELECT c1, c2 FROM t1
  UNION
  (SELECT c1, c2 FROM t2)
  ORDER BY c2, c1
) AS res;

SELECT c1, c2 FROM (
  SELECT c1, c2 FROM t1
  UNION
  (SELECT c1, c2 FROM t2)
  ORDER BY c2 DESC, c1 LIMIT 1
) AS res;

SELECT c1, c2 FROM (
  SELECT c1, c2 FROM t1
  UNION
  (SELECT c1, c2 FROM t2 ORDER BY c2 DESC, c1 LIMIT 1)
) AS res;

SELECT c1, c2 FROM (
  SELECT c1, c2 FROM t1
  UNION
  SELECT c1, c2 FROM t2 
  ORDER BY c2 DESC, c1 DESC LIMIT 1
) AS res;

SELECT c1, c2 FROM (
  (
   (SELECT c1, c2 FROM t1)
   UNION
   (SELECT c1, c2 FROM t2)
  )
  ORDER BY c2 DESC, c1 ASC LIMIT 1
) AS res;

DROP TABLE t1, t2;

--echo #
--echo # Bug #58970 Problem Subquery (without referencing a table) 
--echo #            and Order By
--echo #

SELECT(SELECT 0 AS a UNION SELECT 1 AS a ORDER BY a ASC  LIMIT 1) AS dev;
SELECT(SELECT 0 AS a UNION SELECT 1 AS a ORDER BY a DESC LIMIT 1) AS dev;
SELECT(SELECT 0 AS a FROM dual UNION SELECT 1 AS a FROM dual ORDER BY a ASC  LIMIT 1) AS dev;
SELECT(SELECT 0 AS a FROM dual UNION SELECT 1 AS a FROM dual ORDER BY a DESC LIMIT 1) AS dev;
SELECT(SELECT 1 AS a ORDER BY a) AS dev;
SELECT(SELECT 1 AS a LIMIT 1) AS dev;
SELECT(SELECT 1 AS a FROM dual ORDER BY a DESC LIMIT 1) AS dev;


--echo #
--echo # Bug #17059925 : UNIONS COMPUTES ROWS_EXAMINED INCORRECTLY
--echo #

## Save current state of slow log variables
SET @old_slow_query_log= @@global.slow_query_log;
SET @old_log_output= @@global.log_output;
SET @old_long_query_time= @@long_query_time;
SET GLOBAL log_output= "TABLE";
SET GLOBAL slow_query_log= ON;
SET SESSION long_query_time= 0;

CREATE TABLE t17059925 (a INT);
CREATE TABLE t2 (b INT);
CREATE TABLE t3 (c INT);
INSERT INTO t17059925 VALUES (1), (2), (3);
INSERT INTO t2 VALUES (4), (5), (6);
INSERT INTO t3 VALUES (7), (8), (9);
TRUNCATE table mysql.slow_log;
--sorted_result
--disable_view_protocol
SELECT * FROM t17059925 UNION SELECT * FROM t2 UNION SELECT * FROM t3;
SELECT sql_text, rows_examined FROM mysql.slow_log WHERE sql_text LIKE '%SELECT%t17059925%';
--enable_view_protocol
DROP TABLE t17059925, t2, t3;

## Reset to initial values
SET @@long_query_time= @old_long_query_time;
SET @@global.log_output= @old_log_output;
SET @@global.slow_query_log= @old_slow_query_log;

--echo #
--echo # lp:1010729: Unexpected syntax error from UNION
--echo # (bug #54382) with single-table join nest      
--echo #
CREATE TABLE t1 (a int);
CREATE TABLE t2 (b int);
CREATE TABLE t3 (c int);
SELECT a FROM t1 UNION SELECT b FROM t2 JOIN (t3) ON ( t2.b = t3.c );

DROP TABLE t1, t2, t3;

CREATE TABLE t1 (pk int NOT NULL);
CREATE TABLE t2 (pk int NOT NULL, fk int NOT NULL);
SELECT t1.pk FROM t1 LEFT JOIN (t2) ON (t1.pk = t2.fk)
UNION
SELECT t1.pk FROM t1 LEFT JOIN (t2) ON (t1.pk = t2.fk);

DROP TABLE t1,t2;

#
# Bug #18167356: EXPLAIN W/ EXISTS(SELECT* UNION SELECT*)
#                WHERE ONE OF SELECT* IS DISTINCT FAILS.
#
create table t1 (a int);
insert t1 values (1),(2),(3),(1);
explain select 1 from dual where exists (select max(a) from t1 group by a union select a+2 from t1);
drop table t1;

--echo #
--echo # MDEV-6868:MariaDB  server crash ( select with union and order by
--echo # with subquery )
--echo #

CREATE TABLE t1 ( id INTEGER, sample_name1 VARCHAR(100), sample_name2 VARCHAR(100), PRIMARY KEY(id) );
					
INSERT INTO t1 ( id, sample_name1, sample_name2 ) VALUES ( 1, 'aaaa', 'bbbb' ), ( 2, 'cccc', 'dddd' );
										
(
	SELECT sample_name1 AS testname FROM t1
)
UNION
(
	SELECT sample_name2 AS testname FROM t1 C ORDER BY (SELECT T.sample_name1 FROM t1 T WHERE T.id = C.id)
)
;

drop table t1;


--echo #
--echo # MDEV-10172: UNION query returns incorrect rows outside
--echo # conditional evaluation
--echo #

create table t1 (d datetime not null primary key);
insert into t1(d) values ('2016-06-01'),('2016-06-02'),('2016-06-03'),('2016-06-04');
select * from
(
	select * from t1 where d between '2016-06-02' and '2016-06-05'
	union
	(select * from t1 where d < '2016-06-05' order by d desc limit 1)
) onlyJun2toJun4
order by d;
drop table t1;

--echo End of 5.0 tests

#
#  Bug #24595639: INCORRECT BEHAVIOR IN QUERY WITH UNION AND GROUP BY
#
create table t1 (a int, b int);
insert into t1 values (1,1),(2,2),(3,3);
create table t2 (c varchar(30), d varchar(30));
insert into t1 values ('1','1'),('2','2'),('4','4');
create table t3 (e int, f int);
insert into t3 values (1,1),(2,2),(31,31),(32,32);
select e,f, (e , f) in (select e,b from t1 union select c,d from t2) as sub from t3;
select avg(f), (e , f) in (select e,b from t1 union select c,d from t2) as sub from t3 group by sub;
drop table t1,t2,t3;

--echo #
--echo # MDEV-14715 Assertion `!table || (!table->read_set ||
--echo # bitmap_is_set(table->read_set, field_index))'
--echo # failed in Field_num::val_decimal
--echo #

CREATE TABLE t1 (a INT, b INT) ENGINE=MyISAM;
CREATE VIEW v1 AS SELECT * FROM t1;
INSERT INTO t1 VALUES (1, NULL),(3, 4);

(SELECT a, sum(a) AS f FROM v1 group by a ORDER BY b + sum(a))
UNION
(SELECT 2, 2);

(SELECT a, sum(a) AS f FROM v1 group by a ORDER BY b + 1)
UNION
(SELECT 2, 2);

SELECT a, b FROM t1
UNION
(SELECT a, VAR_POP(a) AS f FROM v1 GROUP BY a ORDER BY b/a );

DROP TABLE t1;

--error ER_VIEW_INVALID
(SELECT a, sum(a) AS f FROM v1 group by a ORDER BY b + 1)
UNION
(SELECT 2, 2);

DROP VIEW v1;

--error ER_NO_SUCH_TABLE
(SELECT a, sum(a) AS f FROM v1 group by a ORDER BY b + 1)
UNION
(SELECT 2, 2);

--echo #
--echo # Bug#27197235 USER VARIABLE + UINON + DECIMAL COLUMN RETURNS
--echo #              WRONG VALUES
--echo #

let $old_charset= `SELECT @@character_set_client`;

SET NAMES utf8;
SET @advertAcctId = 1000003;
select @advertAcctId as a from dual union all select 1.0 from dual;

eval SET NAMES $old_charset;
SET @advertAcctId = 1000003;
select @advertAcctId as a from dual union all select 1.0 from dual;

--echo #
--echo # MDEV-13784: query causes seg fault
--echo #

CREATE TABLE t1 (`bug_id` int NOT NULL PRIMARY KEY, `product_id` int NOT NULL);
INSERT INTO t1 VALUES (45199,1184);

CREATE TABLE t2 (`product_id` int NOT NULL,`userid` int NOT NULL, PRIMARY KEY (`product_id`,`userid`));
INSERT INTO t2 VALUES (1184,103),(1184,624),(1184,1577),(1184,1582);

CREATE TABLE t3 (`id` int NOT NULL  PRIMARY KEY,`name` varchar(64));


CREATE TABLE t4 ( `userid` int NOT NULL PRIMARY KEY, `login_name` varchar(255));
INSERT INTO t4 VALUES (103,'foo'),(624,'foo'),(1577,'foo'),(1582,'foo');
CREATE TABLE t5 (`id` int NOT NULL PRIMARY KEY, `name` varchar(64));

explain select
(
  select login_name from t4 where userId = (
    select userid from t2 where product_id = t1.product_id
    union
    select userid from t2 where product_id = (
      select id from t5 where name = (select name from t3 where id = t1.product_id)) limit 1 )
) as x  from t1 where (t1.bug_id=45199);
select
(
  select login_name from t4 where userId = (
    select userid from t2 where product_id = t1.product_id
    union
    select userid from t2 where product_id = (
      select id from t5 where name = (select name from t3 where id = t1.product_id)) limit 1 )
) as x  from t1 where (t1.bug_id=45199);
drop table t1, t2, t3, t4, t5;

--echo End of 5.5 tests

--echo #
--echo # WL#1763 Avoid creating temporary table in UNION ALL
--echo #

EXPLAIN SELECT 1 UNION ALL SELECT 1 LIMIT 1 OFFSET 1;

--echo # Bug #17579498 CHANGES IN DATATYPE OF THE RESULT QUERY IN UNION.

CREATE TABLE t1 (a TIME);
CREATE TABLE t2 (b DATETIME);

CREATE TABLE t3
SELECT a FROM t1 UNION ALL SELECT b FROM t2;

SELECT column_name, column_type
FROM information_schema.columns
WHERE TABLE_NAME='t3';

DROP TABLE t1, t2, t3;

--echo # Bug #17602922 RESULT DIFFERENCES IN UNION QUERIES WITH IN
--echo # (SUBQUERY-UNION ALL)

CREATE TABLE t1 (a VARCHAR(1));
INSERT INTO t1 VALUES (NULL);
INSERT INTO t1 VALUES (NULL);
INSERT INTO t1 VALUES ('j');
INSERT INTO t1 VALUES ('k');
INSERT INTO t1 VALUES ('r');
INSERT INTO t1 VALUES ('r');
INSERT INTO t1 VALUES ('h');

SELECT a FROM t1 WHERE a IN (SELECT 'r' FROM t1 UNION ALL SELECT 'j');

CREATE TABLE t2
SELECT a FROM t1 WHERE a IN (SELECT 'r' FROM t1 UNION ALL SELECT 'j');

SELECT * FROM t2;

DROP TABLE t1, t2;

CREATE TABLE t1 (a INT PRIMARY KEY);
CREATE TABLE t2 (a INT PRIMARY KEY);
INSERT INTO t2 VALUES (1);

SELECT a, SUM(a) FROM t2 UNION ALL SELECT a, MIN(a) FROM t1 ;

SELECT FOUND_ROWS();

DROP TABLE t1, t2;

--echo # Bug #17669551 CRASH/ASSERT AT SELECT_CREATE::PREPARE2 AT
--echo # SQL_INSERT.CC

CREATE TABLE t1 (a INT);

--error ER_DUP_FIELDNAME
CREATE TABLE t2 SELECT a, a FROM t1 UNION ALL SELECT a, a FROM t1;

DROP TABLE t1;

--echo # Bug #17694956 RESULT DIFFERENCES IN UNION ALL QUERIES WITH LIMIT

CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1);

(SELECT a FROM t1 ORDER BY a LIMIT 0) UNION ALL SELECT a FROM t1;

DROP TABLE t1;

--echo # Bug #17708480 FOUND_ROWS() VALUE DO NOT MATCH WITH UNION ALL QUERIES

CREATE TABLE t1 (a INT) ENGINE=MEMORY;
CREATE TABLE t2 (a INT) ENGINE=MEMORY;
INSERT INTO t2 VALUES (1);

SELECT COUNT(*) FROM (
SELECT                     * FROM t2 UNION ALL SELECT * FROM t1) q;
SELECT SQL_CALC_FOUND_ROWS * FROM t2 UNION ALL SELECT * FROM t1;
SELECT FOUND_ROWS();

SELECT COUNT(*) FROM (
SELECT                     * FROM t1 UNION ALL SELECT * FROM t2) q;
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION ALL SELECT * FROM t2;
SELECT FOUND_ROWS();

DROP TABLE t1, t2;

--echo # End of WL1763 tests

--echo #
--echo # Bug mdev-6874: crash with UNION ALL in a subquery
--echo #

CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (1,1), (2,8);

SELECT * FROM t1 t1_1 LEFT JOIN t1 t1_2 ON ( t1_2.b = t1_1.a )
  WHERE t1_2.b NOT IN ( SELECT 4 UNION ALL SELECT 5 );

DROP TABLE t1;

--echo # Bug mdev-12788: UNION ALL + impossible having for derived
--echo #                 with IN subquery in WHERE
--echo #

CREATE TABLE t1 (i int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1);

CREATE TABLE t2 (pk int PRIMARY KEY) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1),(2);

let $q=
SELECT 1, 2
UNION ALL
SELECT i, COUNT(*) FROM (
  SELECT * FROM t1 WHERE i IN ( SELECT pk FROM t2 )
) AS sq
GROUP BY i
HAVING i = 10;

eval $q;
eval EXPLAIN EXTENDED $q;

DROP TABLE t1,t2;

--echo #
--echo # MDEV-10120: Wrong result of UNION .. ORDER BY GROUP_CONCAT()
--echo #

CREATE TABLE t1 (a INT);
INSERT t1 VALUES (1),(2),(3);

--error ER_AGGREGATE_ORDER_FOR_UNION
(SELECT 1 AS a) UNION (SELECT a FROM t1 GROUP BY a) ORDER BY GROUP_CONCAT(a);
DROP TABLE t1;


--echo #
--echo # Start of 10.3 tests
--echo #

--echo #
--echo # MDEV-12619 UNION creates excessive integer column types for integer literals
--echo #

CREATE TABLE t1 AS SELECT 1;
SHOW CREATE TABLE t1;
DROP TABLE t1;

CREATE OR REPLACE TABLE t1 AS SELECT 1 UNION SELECT 1;
SHOW CREATE TABLE t1;
DROP TABLE t1;

CREATE OR REPLACE TABLE t1 AS SELECT * FROM (SELECT 1 UNION SELECT 1) AS t0;
SHOW CREATE TABLE t1;
DROP TABLE t1;

--echo #
--echo # MDEV-9495 Wrong field type for a UNION of a signed and an unsigned INT expression
--echo #
CREATE TABLE t1 (a INT, b INT UNSIGNED);
INSERT INTO t1 VALUES (0x7FFFFFFF,0xFFFFFFFF);
CREATE TABLE t2 AS SELECT a FROM t1 UNION SELECT b FROM t1;
SHOW CREATE TABLE t2;
SELECT * FROM t2 ORDER BY a;
DROP TABLE t2;
CREATE TABLE t2 AS SELECT COALESCE(a,b), COALESCE(b,a) FROM t1;
SHOW CREATE TABLE t2;
SELECT * FROM t2;
DROP TABLE t2;
DROP TABLE t1;

--echo #
--echo # MDEV-9497 UNION and COALESCE produce different field types for DECIMAL+INT
--echo #
CREATE TABLE t1 AS SELECT COALESCE(10.1,CAST(10 AS UNSIGNED)) AS a;
SHOW CREATE TABLE t1;
DROP TABLE t1;
CREATE OR REPLACE TABLE t1 AS SELECT 10.1 AS a UNION SELECT CAST(10 AS UNSIGNED);
SHOW CREATE TABLE t1;
DROP TABLE t1;

--echo #
--echo # MDEV-12594 UNION between fixed length double columns does not always preserve scale
--echo #
CREATE TABLE t1 (a FLOAT(20,4), b FLOAT(20,3), c FLOAT(20,4));
INSERT INTO t1 VALUES (1111,2222,3333);

CREATE TABLE t2 AS SELECT a FROM t1 UNION SELECT a FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;

CREATE OR REPLACE TABLE t2 SELECT a FROM t1 UNION SELECT c FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;

CREATE OR REPLACE TABLE t2 SELECT b FROM t1 UNION SELECT b FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;

CREATE OR REPLACE TABLE t2 SELECT c FROM t1 UNION SELECT c FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;

CREATE OR REPLACE TABLE t2 SELECT c FROM t1 UNION SELECT a FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;

CREATE OR REPLACE TABLE t2 AS SELECT a FROM t1 UNION SELECT b FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;

CREATE OR REPLACE TABLE t2 AS SELECT b FROM t1 UNION SELECT a FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;

DROP TABLE t1;

--echo # Corner case
CREATE TABLE t1 (a FLOAT(255,4), b FLOAT(255,3));
INSERT INTO t1 VALUES (1111,2222);
CREATE OR REPLACE TABLE t2 AS SELECT b FROM t1 UNION SELECT a FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
DROP TABLE t1;


--echo #
--echo # MDEV-12595 UNION converts INT to BIGINT
--echo #
CREATE TABLE t1 AS SELECT
  1,
  -1,
  COALESCE(1,1),
  COALESCE(-1,-1),
  COALESCE(1,-1),
  COALESCE(-1,1);
SHOW CREATE TABLE t1;
DROP TABLE t1;
CREATE TABLE t1 AS SELECT 1 AS c1,1 AS c2,-1 AS c3,-1 AS c4 UNION SELECT 1,-1,1,-1;
SHOW CREATE TABLE t1;
DROP TABLE t1;


--echo #
--echo # MDEV-12599 UNION is not symmetric when mixing INT and CHAR
--echo #

CREATE OR REPLACE TABLE t1 AS SELECT 1 AS c1, 'a' AS c2 UNION SELECT 'a', 1;
SHOW CREATE TABLE t1;
DROP TABLE t1;

CREATE OR REPLACE TABLE t1 AS SELECT 11112222 AS c1, 'a' AS c2 UNION SELECT 'a', 11112222;
SHOW CREATE TABLE t1;
DROP TABLE t1;


CREATE OR REPLACE TABLE t1 AS SELECT 111122223333 AS c1, 'a' AS c2 UNION SELECT 'a', 111122223333;
SHOW CREATE TABLE t1;
DROP TABLE t1;

CREATE OR REPLACE TABLE t1 AS SELECT 1111222233334444 AS c1, 'a' AS c2 UNION SELECT 'a', 1111222233334444;
SHOW CREATE TABLE t1;
DROP TABLE t1;

CREATE TABLE t1 (a INT(3), b VARCHAR(1));
CREATE TABLE t2 AS SELECT a,b FROM t1 UNION SELECT b,a FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
DROP TABLE t1;

CREATE TABLE t1 (a BIGINT(3), b VARCHAR(1));
CREATE TABLE t2 AS SELECT a,b FROM t1 UNION SELECT b,a FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
DROP TABLE t1;

CREATE TABLE t1 (a BIGINT(12), b VARCHAR(1));
CREATE TABLE t2 AS SELECT a,b FROM t1 UNION SELECT b,a FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;
DROP TABLE t1;

--echo #
--echo # MDEV-13232: Assertion `(&(&share->intern_lock)->m_mutex)->count > 0 &&
--echo # pthread_equal(pthread_self(), (&(&share->intern_lock)->m_mutex)->
--echo # thread)' failed in _ma_state_info_write
--echo #

CREATE TABLE t1 (c1 CHAR(8));
INSERT INTO t1 VALUES ('10'),('-10');
 
CREATE TABLE t2 (c2 CHAR);
SET @a= CAST('10' AS CHAR);
 
SELECT c1 FROM t1 UNION SELECT - @a FROM t2;

drop table t1,t2;

--echo #
--echo # MDEV-18700: EXPLAIN EXTENDED for query with UNION ALL
--echo #             after INTERSECT/EXCEPT operations
--echo #

create table t1 (a int);
insert into t1 values (3), (1), (7), (3), (2), (7), (4);

create table t2 (a int);
insert into t2 values (4), (5), (9), (1), (8), (9);

create table t3 (a int);
insert into t3 values (8), (1), (8), (2), (3), (7), (2);

explain extended
select * from t2 where a < 5
intersect
select * from t3 where a < 5
union all
select * from t1 where a > 4;

explain extended
select * from t2 where a < 5
except
select * from t3 where a < 5
union all
select * from t1 where a > 4;

drop table t1,t2,t3;

--echo #
--echo # MDEV-24387: Wrong number of decimal digits in certain UNION/Subqery
--echo #             constellation
--echo #

--disable_ps_protocol
--enable_metadata
--disable_view_protocol

SELECT CAST(1 AS UNSIGNED) UNION ALL SELECT * from (SELECT NULL) t;
SELECT CAST(1 AS SIGNED) UNION ALL SELECT * from (SELECT NULL) t;
SELECT CAST(1 AS SIGNED) UNION ALL SELECT * from (SELECT CAST(1 AS UNSIGNED)) t;

SELECT CAST(1 AS UNSIGNED) UNION ALL SELECT NULL;
SELECT CAST(1 AS UNSIGNED) UNION ALL SELECT CAST(1 AS SIGNED);

--enable_view_protocol
--disable_metadata
--enable_ps_protocol

--echo #
--echo # MDEV-24511 null field is created with CREATE..SELECT
--echo #

set @save_default_storage_engine=@@default_storage_engine;
SET @@default_storage_engine=MEMORY;

CREATE TABLE t1 SELECT NULL UNION SELECT NULL;
--error ER_KEY_COLUMN_DOES_NOT_EXIST
ALTER TABLE t1 ADD INDEX (`PRIMARY`);

CREATE TABLE t2 SELECT NULL;
SHOW CREATE TABLE t2;

CREATE TABLE t3 SELECT NULL UNION SELECT NULL;
SHOW CREATE TABLE t3;

CREATE OR REPLACE TABLE t4 SELECT NULL UNION SELECT NULL;
SHOW CREATE TABLE t4;
ALTER TABLE t4 ADD INDEX (`NULL`);

DROP TABLE t1, t2, t3, t4;

set @@default_storage_engine=@save_default_storage_engine;


--echo #
--echo # MDEV-29022: add_slave destroy child list and has dead code
--echo # (test added to be sure that ordering by several subqueries works)
--echo #

create table t1 (aa int);

insert into t1 values (-1),(0),(1),(2),(3),(4),(5),(6),(98),(99),(100),(102);


create table t2 (a int, b int);

insert into t2 values (2,2),(2,3),(3,4),(3,5);


select a as a, b as b,
       (select max(aa) from t1 where aa < t2.a) as c,
       (select max(aa) from t1 where aa < t2.b) as d
  from t2
union select 0 as a, 100 as b,
       (select max(aa) from t1 where aa < 0) as c,
       (select max(aa) from t1 where aa < 100) as d
union select 0 as a, 99 as b,
       (select max(aa) from t1 where aa < 0) as c,
       (select max(aa) from t1 where aa < 99) as d
  order by (select max(aa) from t1 where aa < a),
           (select max(aa) from t1 where aa < b);

select a as a, b as b,
       (select max(aa) from t1 where aa < t2.a) as c,
       (select 200 - max(aa) from t1 where aa < t2.b) as d
  from t2
union select 0 as a, 100 as b,
       (select max(aa) from t1 where aa < 0) as c,
       (select 200 - max(aa) from t1 where aa < 100) as d
union select 0 as a, 99 as b,
       (select max(aa) from t1 where aa < 0) as c,
       (select 200 - max(aa) from t1 where aa < 99) as d
  order by (select max(aa) from t1 where aa < a),
           (select 200 - max(aa) from t1 where aa < b);


(select a as a, b as b,
       (select max(aa) from t1 where aa < t2.a) as c,
       (select max(aa) from t1 where aa < t2.b) as d
  from t2)
union (select 0 as a, 100 as b,
       (select max(aa) from t1 where aa < 0) as c,
       (select max(aa) from t1 where aa < 100) as d)
union (select 0 as a, 99 as b,
       (select max(aa) from t1 where aa < 0) as c,
       (select max(aa) from t1 where aa < 99) as d)
  order by (select max(aa) from t1 where aa < a),
           (select max(aa) from t1 where aa < b);

(select a as a, b as b,
       (select max(aa) from t1 where aa < t2.a) as c,
       (select 200 - max(aa) from t1 where aa < t2.b) as d
  from t2)
union (select 0 as a, 100 as b,
       (select max(aa) from t1 where aa < 0) as c,
       (select 200 - max(aa) from t1 where aa < 100) as d)
union (select 0 as a, 99 as b,
       (select max(aa) from t1 where aa < 0) as c,
       (select 200 - max(aa) from t1 where aa < 99) as d)
  order by (select max(aa) from t1 where aa < a),
           (select 200 - max(aa) from t1 where aa < b);

drop table t1,t2;

--echo #
--echo # MDEV-30066 (limit + offset) union all (...) limit = incorrect result
--echo #
create table t1(id int primary key auto_increment, c1 int);
insert into t1(c1) values(1),(2),(3);
(select * from t1 where c1>=1 order by c1 desc limit 2,1) union all (select * from t1 where c1>1 order by c1 desc);
(select * from t1 where c1>=1 order by c1 desc limit 2,1) union all (select * from t1 where c1>1 order by c1 desc) limit 2;
drop table t1;

--echo #
--echo # End of 10.3 tests
--echo #