~drizzle-trunk/drizzle/development

#
# simple test of group_concat function
#
--disable_warnings
drop table if exists t1, t2;
--enable_warnings

create table t1 (grp int, a bigint, c char(10) not null, d char(10) not null);
insert into t1 values (1,1,"a","a");
insert into t1 values (2,2,"b","a");
insert into t1 values (2,3,"c","b");
insert into t1 values (3,4,"E","a");
insert into t1 values (3,5,"C","b");
insert into t1 values (3,6,"D","b");
insert into t1 values (3,7,"d","d");
insert into t1 values (3,8,"d","d");
insert into t1 values (3,9,"D","c");

# Test of MySQL simple request
select grp,group_concat(c) from t1 group by grp;
explain extended select grp,group_concat(c) from t1 group by grp;
select grp,group_concat(a,c) from t1 group by grp;
select grp,group_concat("(",a,":",c,")") from t1 group by grp;

# Test of MySQL with options
select grp,group_concat(c separator ",") from t1 group by grp;
select grp,group_concat(c separator "---->") from t1 group by grp;
select grp,group_concat(c order by c) from t1 group by grp;
select grp,group_concat(c order by c desc) from t1 group by grp;
select grp,group_concat(d order by a) from t1 group by grp;
select grp,group_concat(d order by a desc) from t1 group by grp;
--disable_warnings
select grp,group_concat(a order by a,d+c-ascii(c)-a) from t1 group by grp;
select grp,group_concat(a order by d+c-ascii(c),a) from t1 group by grp;
--enable_warnings
select grp,group_concat(c order by 1) from t1 group by grp;
select grp,group_concat(distinct c order by c) from t1 group by grp;
select grp,group_concat(distinct c order by c desc) from t1 group by grp;
explain extended select grp,group_concat(distinct c order by c desc) from t1 group by grp;
select grp,group_concat(c order by c separator ",") from t1 group by grp;
select grp,group_concat(c order by c desc separator ",") from t1 group by grp;
select grp,group_concat(distinct c order by c separator ",") from t1 group by grp;
explain extended select grp,group_concat(distinct c order by c separator ",") from t1 group by grp;
select grp,group_concat(distinct c order by c desc separator ",") from t1 group by grp;

# Test of SQL_LIST objects
select grp,group_concat(c order by grp desc) from t1 group by grp order by grp;


# Test transfer to real values

select grp, group_concat(a separator "")+0 from t1 group by grp;
select grp, group_concat(a separator "")+0.0 from t1 group by grp;
select grp, ROUND(group_concat(a separator "")) from t1 group by grp;
drop table t1;

# Test NULL values

create table t1 (grp int, c char(10));
insert into t1 values (1,NULL),(2,"b"),(2,NULL),(3,"E"),(3,NULL),(3,"D"),(3,NULL),(3,NULL),(3,"D"),(4,""),(5,NULL);
select grp,group_concat(c order by c) from t1 group by grp;

# Test warnings

set group_concat_max_len = 4;
select grp,group_concat(c) from t1 group by grp;
show warnings;
set group_concat_max_len = 1024;

# Test errors

--error ER_INVALID_GROUP_FUNC_USE
select group_concat(sum(c)) from t1 group by grp;
--error ER_BAD_FIELD_ERROR
select grp,group_concat(c order by 2) from t1 group by grp;

drop table t1;

# Test variable length

create table t1 ( URL_ID int, URL varchar(80));
create table t2 ( REQ_ID int, URL_ID int);
insert into t1 values (4,'www.host.com'), (5,'www.google.com'),(5,'www.help.com');
insert into t2 values (1,4), (5,4), (5,5);
# Make this order independent
--replace_result www.help.com X www.host.com X www.google.com X
select REQ_ID, Group_Concat(URL) as URL from t1, t2 where
t2.URL_ID = t1.URL_ID group by REQ_ID;
# check min/max function
--replace_result www.help.com X www.host.com X www.google.com X
select REQ_ID, Group_Concat(URL) as URL, Min(t1.URL_ID) urll,
Max(t1.URL_ID) urlg from t1, t2 where t2.URL_ID = t1.URL_ID group by REQ_ID;

drop table t1;
drop table t2;

create table t1 (id int, name varchar(16));
insert into t1 values (1,'longername'),(1,'evenlongername');
select ifnull(group_concat(concat(t1.id, ':', t1.name)), 'shortname') as 'without distinct: how it should be' from t1;
select distinct ifnull(group_concat(concat(t1.id, ':', t1.name)), 'shortname') as 'with distinct: cutoff at length of shortname' from t1;
drop table t1;

# check zero rows (bug#836)
create table t1(id int);
create table t2(id int);
insert into t1 values(0),(1);
select group_concat(t1.id) FROM t1,t2 where t2.id < 2;
drop table t1;
drop table t2;

# check having
create table t1 (bar varchar(32));
insert into t1 values('test1'),('test2');
select group_concat(bar order by concat(bar,bar)) from t1;
select group_concat(bar order by concat(bar,bar) desc) from t1;
select bar from t1 having group_concat(bar)='';
select bar from t1 having instr(group_concat(bar), "test") > 0;
select bar from t1 having instr(group_concat(bar order by concat(bar,bar) desc), "test2,test1") > 0;
drop table t1;

# ORDER BY fix_fields()
create table t1 (a int, a1 varchar(10));
create table t2 (a0 int);
insert into t1 values (0,"a"),(0,"b"),(1,"c");
insert into t2 values (1),(2),(3);
select  group_concat(a1 order by (t1.a IN (select a0 from t2))) from t1;
select  group_concat(a1 order by (t1.a)) from t1;
drop table t1, t2;

#
# Problem with GROUP BY (Bug #2695)
#

CREATE TABLE t1 (id1 int NOT NULL, id2 int NOT NULL);
INSERT INTO t1 VALUES (1, 1),(1, 2),(1, 3),(1, 4),(1, 5),(2, 1),(2, 2),(2, 3);
CREATE TABLE t2 (id1 int NOT NULL);
INSERT INTO t2 VALUES (1),(2),(3),(4),(5);
SELECT t1.id1, GROUP_CONCAT(t1.id2 ORDER BY t1.id2 ASC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 AND t1.id1=1 GROUP BY t1.id1;
SELECT t1.id1, GROUP_CONCAT(t1.id2 ORDER BY t1.id2 ASC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 GROUP BY t1.id1;
SELECT t1.id1, GROUP_CONCAT(t1.id2 ORDER BY t1.id2 DESC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 GROUP BY t1.id1;
SELECT t1.id1, GROUP_CONCAT(t1.id2 ORDER BY 6-t1.id2 ASC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 GROUP BY t1.id1;

# The following failed when it was run twice:
SELECT t1.id1, GROUP_CONCAT(t1.id2,6-t1.id2 ORDER BY 6-t1.id2 ASC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 GROUP BY t1.id1;
SELECT t1.id1, GROUP_CONCAT(t1.id2,6-t1.id2 ORDER BY 6-t1.id2 ASC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 GROUP BY t1.id1;

SELECT t1.id1, GROUP_CONCAT(t1.id2,"/",6-t1.id2 ORDER BY 1+0,6-t1.id2,t1.id2 ASC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 GROUP BY t1.id1;
drop table t1,t2;

#
# Problem with distinct (Bug #3381)
#

create table t1 (s1 char(10), s2 int not null);
insert into t1 values ('a',2),('b',2),('c',1),('a',3),('b',4),('c',4);
select distinct s1 from t1 order by s2,s1;
select group_concat(distinct s1) from t1;
select group_concat(distinct s1 order by s2) from t1 where s2 < 4;
# The following is wrong and needs to be fixed ASAP
select group_concat(distinct s1 order by s2) from t1;
drop table t1;

#
# Test with subqueries (Bug #3319)
#

create table t1 (a int, c int);
insert into t1 values (1, 2), (2, 3), (2, 4), (3, 5);
create table t2 (a int, c int);
insert into t2 values (1, 5), (2, 4), (3, 3), (3,3);
select group_concat(c) from t1;
select group_concat(c order by (select c from t2 where t2.a=t1.a limit 1)) as grp from t1;
select group_concat(c order by (select mid(group_concat(c order by a),1,5) from t2 where t2.a=t1.a)) as grp from t1;
select group_concat(c order by (select mid(group_concat(c order by a),1,5) from t2 where t2.a=t1.a) desc) as grp from t1;
select t1.a, group_concat(c order by (select c from t2 where t2.a=t1.a limit 1)) as grp from t1 group by 1;
select t1.a, group_concat(c order by (select mid(group_concat(c order by a),1,5) from t2 where t2.a=t1.a)) as grp from t1 group by 1;
select t1.a, group_concat(c order by (select mid(group_concat(c order by a),1,5) from t2 where t2.a=t1.a) desc) as grp from t1 group by 1;

# The following returns random results as we are sorting on blob addresses
select group_concat(c order by (select concat(5-t1.c,group_concat(c order by a)) from t2 where t2.a=t1.a)) as grp from t1;
select group_concat(c order by (select concat(t1.c,group_concat(c)) from t2 where a=t1.a)) as grp from t1;

select a,c,(select group_concat(c order by a) from t2 where a=t1.a) as grp from t1 order by grp;
drop table t1,t2;

#
# group_concat of expression with GROUP BY and external GROUP BY
#
CREATE TABLE t1 ( a int );
CREATE TABLE t2 ( a int );
INSERT INTO t1 VALUES (1), (2);
INSERT INTO t2 VALUES (1), (2);
SELECT GROUP_CONCAT(t1.a*t2.a ORDER BY t2.a) FROM t1, t2 WHERE t1.a < 3 GROUP BY t1.a;
DROP TABLE t1, t2;

#
# Bug #4035: group_concat() and HAVING
#

CREATE TABLE t1 (a char(4));
INSERT INTO t1 VALUES ('John'), ('Anna'), ('Bill');
SELECT GROUP_CONCAT(a SEPARATOR '||') AS names FROM t1 
  HAVING names LIKE '%An%';
SELECT GROUP_CONCAT(a SEPARATOR '###') AS names FROM t1 
  HAVING LEFT(names, 1) ='J';
DROP TABLE t1;

#
# check blobs
#

CREATE TABLE t1 ( a int, b TEXT );
INSERT INTO t1 VALUES (1,'First Row'), (2,'Second Row');
SELECT GROUP_CONCAT(b ORDER BY b) FROM t1 GROUP BY a;
DROP TABLE t1;

#
# check null values #2
#

CREATE TABLE t1 (A_ID INT NOT NULL,A_DESC CHAR(3) NOT NULL,PRIMARY KEY (A_ID));
INSERT INTO t1 VALUES (1,'ABC'), (2,'EFG'), (3,'HIJ');
CREATE TABLE t2 (A_ID INT NOT NULL,B_DESC CHAR(3) NOT NULL,PRIMARY KEY (A_ID,B_DESC));
INSERT INTO t2 VALUES (1,'A'),(1,'B'),(3,'F');
SELECT t1.A_ID, GROUP_CONCAT(t2.B_DESC) AS B_DESC FROM t1 LEFT JOIN t2 ON t1.A_ID=t2.A_ID GROUP BY t1.A_ID ORDER BY t1.A_DESC;
DROP TABLE t1;
DROP TABLE t2;

#
# blobs
#

create table t1 (a int, b text);
insert into t1 values (1, 'bb'), (1, 'ccc'), (1, 'a'), (1, 'bb'), (1, 'ccc');
insert into t1 values (2, 'BB'), (2, 'CCC'), (2, 'A'), (2, 'BB'), (2, 'CCC');
select group_concat(b) from t1 group by a;
select group_concat(distinct b) from t1 group by a;
select group_concat(b order by b) from t1 group by a;
select group_concat(distinct b order by b) from t1 group by a;
set local group_concat_max_len=4;
select group_concat(b) from t1 group by a;
select group_concat(distinct b) from t1 group by a;
select group_concat(b order by b) from t1 group by a;
select group_concat(distinct b order by b) from t1 group by a;

#
# long blobs
#

insert into t1 values (1, concat(repeat('1', 300), '2')), 
(1, concat(repeat('1', 300), '2')), (1, concat(repeat('0', 300), '1')), 
(2, concat(repeat('1', 300), '2')), (2, concat(repeat('1', 300), '2')), 
(2, concat(repeat('0', 300), '1'));
set local group_concat_max_len=1024;
select group_concat(b) from t1 group by a;
select group_concat(distinct b) from t1 group by a;
select group_concat(b order by b) from t1 group by a;
select group_concat(distinct b order by b) from t1 group by a;
set local group_concat_max_len=400;
select group_concat(b) from t1 group by a;
select group_concat(distinct b) from t1 group by a;
select group_concat(b order by b) from t1 group by a;
select group_concat(distinct b order by b) from t1 group by a;

drop table t1;

#
# Bug#10201
#
create table t1 (a varchar(255), b varchar(255) );
insert into t1 values ('xxx','yyy');
select collation(a) from t1;
select collation(group_concat(a)) from t1;
create table t2 select group_concat(a) as a from t1;
--replace_regex /ENGINE=[a-zA-Z]+/ENGINE=DEFAULT/
show create table t2;
select collation(group_concat(a,b)) from t1;
drop table t1;
drop table t2;

#
# Bug #12829
# Cannot convert the charset of a GROUP_CONCAT result
#
#CREATE TABLE t1 (a VARCHAR(10));
#INSERT INTO t1 VALUES ('À');
#SELECT a FROM t1;
#SELECT GROUP_CONCAT(a) FROM t1;
#DROP TABLE t1;

#
# bug #7769: group_concat returning null is checked in having
#
CREATE TABLE t1 (id int);
SELECT GROUP_CONCAT(id) AS gc FROM t1 HAVING gc IS NULL;
DROP TABLE t1;

#
# Bug #8656: Crash with group_concat on alias in outer table
#
create table t2 (a int, b int);
insert into t2 values (1,1), (2,2);
select  b x, (select group_concat(x) from t2) from  t2;
drop table t2;

#
# Bug #7405: problems with rollup
#

create table t1 (d int not null auto_increment,primary key(d), a int, b int, c int);
insert into t1(a,b) values (1,3), (1,4), (1,2), (2,7), (1,1), (1,2), (2,3), (2,3);
select d,a,b from t1 order by a;
explain select a, group_concat(b) from t1 group by a with rollup;
select a, group_concat(b) from t1 group by a with rollup;
select a, group_concat(distinct b) from t1 group by a with rollup;
select a, group_concat(b order by b) from t1 group by a with rollup;
select a, group_concat(distinct b order by b) from t1 group by a with rollup;
drop table t1;

#
# Bug #6475
#
create table t1 (a char(3), b char(20), primary key (a, b));
insert into t1 values ('ABW', 'Dutch'), ('ABW', 'English');
select group_concat(a) from t1 group by b;
drop table t1;
#
# Bug #12095: GROUP_CONCAT for one row table 
#

CREATE TABLE t1 (
  aID int NOT NULL auto_increment,
  sometitle varchar(155) NOT NULL default '',
  bID int NOT NULL,
  PRIMARY KEY  (aID),
  UNIQUE KEY sometitle (sometitle)
);
INSERT INTO t1 SET sometitle = 'title1', bID = 1;
INSERT INTO t1 SET sometitle = 'title2', bID = 1;

CREATE TABLE t2 (
  bID int NOT NULL auto_increment,
  somename varchar(155) NOT NULL default '',
  PRIMARY KEY  (bID),
  UNIQUE KEY somename (somename)
);
INSERT INTO t2 SET somename = 'test';

SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
  FROM t1 JOIN t2 ON t1.bID = t2.bID;
INSERT INTO t2 SET somename = 'test2';
SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
  FROM t1 JOIN t2 ON t1.bID = t2.bID;
DELETE FROM t2 WHERE somename = 'test2';
SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
  FROM t1 JOIN t2 ON t1.bID = t2.bID;

DROP TABLE t1,t2;

#
# Bug #12859 group_concat in subquery cause incorrect not null
#
create table t1 ( a int not null default 0);
select * from (select group_concat(a) from t1) t2;
select group_concat('x') UNION ALL select 1;
drop table t1;

#
# Bug #12863 : missing separators after first empty cancatanated elements
#

CREATE TABLE t1 (id int, a varchar(9));
INSERT INTO t1 VALUES
  (2, ''), (1, ''), (2, 'x'), (1, 'y'), (3, 'z'), (3, '');

SELECT GROUP_CONCAT(a) FROM t1;
SELECT GROUP_CONCAT(a ORDER BY a) FROM t1;

SELECT GROUP_CONCAT(a) FROM t1 GROUP BY id;
SELECT GROUP_CONCAT(a ORDER BY a) FROM t1 GROUP BY id;

DROP TABLE t1;

#
# Bug #15560: GROUP_CONCAT wasn't ready for WITH ROLLUP queries
#
create table t1(f1 int);
insert into t1 values(1),(2),(3);
select f1, group_concat(f1+1) from t1 group by f1 with rollup;
select count(distinct (f1+1)) from t1 group by f1 with rollup;
drop table t1;

#
# Bug#14169 type of group_concat() result changed to blob if tmp_table was used
#
create table t1 (f1 int, f2 varchar(255));
insert into t1 values (1,repeat('a',255)),(2,repeat('b',255));
--enable_metadata
select f2,group_concat(f1) from t1 group by f2;
--disable_metadata
drop table t1;

# End of 4.1 tests

#
# Bug#8568 "GROUP_CONCAT returns string, unless in a UNION in which case
# returns BLOB": add a test case, the bug can not be repeated any more.
#

create table t1 (a char, b char);
insert into t1 values ('a', 'a'), ('a', 'b'), ('b', 'a'), ('b', 'b');
create table t2 select group_concat(b) as a from t1 where a = 'a';
create table t3 (select group_concat(a) as a from t1 where a = 'a') union
                (select group_concat(b) as a from t1 where a = 'b');
drop table t1, t2, t3;

#
# Bug #16712: group_concat returns odd string instead of intended result
#
CREATE TABLE t1 (a INT, b LONGTEXT, PRIMARY KEY (a));

SET GROUP_CONCAT_MAX_LEN = 20000000;

INSERT INTO t1 VALUES (1,REPEAT(CONCAT('A',CAST(CHAR(0) AS BINARY),'B'), 40000));
INSERT INTO t1 SELECT a + 1, b FROM t1;

SELECT a, CHAR_LENGTH(b) FROM t1;
SELECT CHAR_LENGTH( GROUP_CONCAT(b) ) FROM t1;
SET GROUP_CONCAT_MAX_LEN = 1024;
DROP TABLE t1;

#
# Bug #22015: crash with GROUP_CONCAT over a derived table that 
#             returns the results of aggregation by GROUP_CONCAT  
#

CREATE TABLE t1 (a int, b int);

INSERT INTO t1 VALUES (2,1), (1,2), (2,2), (1,3);

SELECT GROUP_CONCAT(a), x 
  FROM (SELECT a, GROUP_CONCAT(b) x FROM t1 GROUP BY a) AS s
    GROUP BY x;

DROP TABLE t1;
#
# Bug#23451 GROUP_CONCAT truncates a multibyte utf8 character
#
create table t1
(
  x text not null,
  y integer not null
);
insert into t1 values (repeat('a', 1022), 0), (repeat( 0xc3b7, 4), 0);
let $1= 10;
while ($1)
{
  eval set group_concat_max_len= 1022 + $1;
  --disable_result_log
  select @x:=group_concat(x) from t1 group by y;
  --enable_result_log
  select @@group_concat_max_len, length(@x), char_length(@x), right(@x,12), right(HEX(@x),12);
  dec $1;
}
drop table t1;
set group_concat_max_len=1024;

#
# Bug#14169 type of group_concat() result changed to blob if tmp_table was used
#
create table t1 (f1 int, f2 varchar(255));
insert into t1 values (1,repeat('a',255)),(2,repeat('b',255));
--enable_metadata
select f2,group_concat(f1) from t1 group by f2;
--disable_metadata
drop table t1;

#
# Bug #26815: Unexpected built-in function behavior: group_concat(distinct
# substring_index())
# 
CREATE TABLE t1(a TEXT, b CHAR(20));
INSERT INTO t1 VALUES ("one.1","one.1"),("two.2","two.2"),("one.3","one.3");
SELECT GROUP_CONCAT(DISTINCT UCASE(a)) FROM t1;
SELECT GROUP_CONCAT(DISTINCT UCASE(b)) FROM t1;
DROP TABLE t1;

#
# Bug #28273: GROUP_CONCAT and ORDER BY: No warning when result gets truncated.
#
CREATE TABLE t1( a VARCHAR( 10 ), b INT );
INSERT INTO t1 VALUES ( repeat( 'a', 10 ), 1), 
                      ( repeat( 'b', 10 ), 2);
SET group_concat_max_len = 20;
SELECT GROUP_CONCAT( a ) FROM t1;
SELECT GROUP_CONCAT( DISTINCT a ) FROM t1;  
SELECT GROUP_CONCAT( a ORDER BY b ) FROM t1;          
SELECT GROUP_CONCAT( DISTINCT a ORDER BY b ) FROM t1; 
SET group_concat_max_len = DEFAULT;
DROP TABLE t1;
# Bug #23856:GROUP_CONCAT and ORDER BY: junk from previous rows for query on I_S
#
SET group_concat_max_len= 65535;
CREATE TABLE t1( a TEXT, b INTEGER );
INSERT INTO t1 VALUES ( 'a', 0 ), ( 'b', 1 );
SELECT GROUP_CONCAT( a ORDER BY b ) FROM t1;
SELECT GROUP_CONCAT(DISTINCT a ORDER BY b) FROM t1;
SELECT GROUP_CONCAT(DISTINCT a) FROM t1;
SET group_concat_max_len= 10;
SELECT GROUP_CONCAT(a ORDER BY b) FROM t1;
SELECT GROUP_CONCAT(DISTINCT a ORDER BY b) FROM t1;
SELECT GROUP_CONCAT(DISTINCT a) FROM t1;

SET group_concat_max_len= 65535;
CREATE TABLE t2( a TEXT );
INSERT INTO t2 VALUES( REPEAT( 'a', 5000 ) );
INSERT INTO t2 VALUES( REPEAT( 'b', 5000 ) );
INSERT INTO t2 VALUES( REPEAT( 'a', 5000 ) );
SELECT LENGTH( GROUP_CONCAT( DISTINCT a ) ) FROM t2;

CREATE TABLE t3( a TEXT, b INT  );
INSERT INTO t3 VALUES( REPEAT( 'a', 65534 ), 1 );
INSERT INTO t3 VALUES( REPEAT( 'a', 65535 ), 2 );
INSERT INTO t3 VALUES( REPEAT( 'a', 65533 ), 3 );
SELECT LENGTH( GROUP_CONCAT( a ) ) FROM t3 WHERE b = 1;
SELECT LENGTH( GROUP_CONCAT( a ) ) FROM t3 WHERE b = 2;
SELECT LENGTH( GROUP_CONCAT( a ) ) FROM t3 WHERE b = 3;

SET group_concat_max_len= DEFAULT;
DROP TABLE t1, t2, t3;

#
# Bug#29850: Wrong charset of the GROUP_CONCAT result when the select employs
#            a temporary table.
#
#create table t1 (id int, name varchar(20));
#insert into t1 (id, name) values (1, "óra");
#insert into t1 (id, name) values (2, "óra");
#select b.id, group_concat(b.name) from t1 a, t1 b group by b.id;
#drop table t1;

#
# Bug#30897 GROUP_CONCAT returns extra comma on empty fields
#
create table t1 (f1 char(20));
insert into t1 values (''),('');
select group_concat(distinct f1) from t1;
select group_concat(f1) from t1;
drop table t1;
# Bug#32798: DISTINCT in GROUP_CONCAT clause fails when ordering by a column
# with null values
#'
CREATE TABLE t1 (a INT, b INT);

INSERT INTO t1 VALUES (1, 1), (2, 2), (2, 3);

SELECT GROUP_CONCAT(DISTINCT a ORDER BY b) FROM t1;
SELECT GROUP_CONCAT(DISTINCT a ORDER BY b DESC) FROM t1;
SELECT GROUP_CONCAT(DISTINCT a) FROM t1;

SELECT GROUP_CONCAT(DISTINCT a + 1 ORDER BY 3 - b) FROM t1;
SELECT GROUP_CONCAT(DISTINCT a + 1 ORDER BY b) FROM t1;
SELECT GROUP_CONCAT(a ORDER BY 3 - b) FROM t1;

CREATE TABLE t2 (a INT, b INT, c INT, d INT);

# There is one duplicate in the expression list: 1,10
# There is one duplicate in ORDER BY list, but that shouldnt matter: 1,10
INSERT INTO t2 VALUES (1,1, 1,1), (1,1, 2,2), (1,2, 2,1), (2,1, 1,2);

SELECT GROUP_CONCAT(DISTINCT a, b ORDER BY c, d) FROM t2;
SELECT GROUP_CONCAT(DISTINCT a, b ORDER BY d, c) FROM t2;

CREATE TABLE t3 (a INT, b INT, c INT);

INSERT INTO t3 VALUES (1, 1, 1), (2, 1, 2), (3, 2, 1);

SELECT GROUP_CONCAT(DISTINCT a, b ORDER BY b, c) FROM t3;
SELECT GROUP_CONCAT(DISTINCT a, b ORDER BY c, b) FROM t3;

SELECT GROUP_CONCAT(DISTINCT a, b ORDER BY a, b) FROM t1;
SELECT GROUP_CONCAT(DISTINCT b, a ORDER BY a, b) FROM t1;
SELECT GROUP_CONCAT(DISTINCT a, b ORDER BY b, a) FROM t1;
SELECT GROUP_CONCAT(DISTINCT b, a ORDER BY a, b) FROM t1;
SELECT GROUP_CONCAT(DISTINCT a ORDER BY a, b) FROM t1;
SELECT GROUP_CONCAT(DISTINCT b ORDER BY b, a) FROM t1;
SELECT GROUP_CONCAT(DISTINCT a, b ORDER BY a) FROM t1;
SELECT GROUP_CONCAT(DISTINCT b, a ORDER BY b) FROM t1;

DROP TABLE t1, t2, t3;

#
# Bug #34747: crash in debug assertion check after derived table
#
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES (),();
SELECT s1.d1 FROM
(
 SELECT
  t1.a as d1,
  GROUP_CONCAT(DISTINCT t1.a) AS d2
 FROM
  t1 AS t1,
  t1 AS t2
 WHERE t2.a IS NULL
 GROUP BY 1
) AS s1;
DROP TABLE t1;

--echo End of 5.0 tests