#
# simple test of group_concat function
#
source include/have_sequence.inc;

create table t1 (grp int, a bigint unsigned, 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 1111
select group_concat(sum(c)) from t1 group by grp;
--error 1054
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(11), URL varchar(80));
create table t2 ( REQ_ID int(11), URL_ID int(11));
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;
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 tinyint(4) NOT NULL, id2 tinyint(4) 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 tinyint(4) 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 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) character set cp1250 collate cp1250_general_ci,
                 b varchar(255) character set koi8r);
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;
show create table t2;
select collation(group_concat(a,_koi8r'test')) from t1;
--error 1267
select collation(group_concat(a,_koi8r 0xC1C2)) from t1;
--error 1267
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 CHAR(10) CHARACTER SET cp850);
INSERT INTO t1 VALUES ('Ŕ');
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 smallint(5) unsigned NOT NULL auto_increment,
  sometitle varchar(255) NOT NULL default '',
  bID smallint(5) unsigned 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 smallint(5) unsigned NOT NULL auto_increment,
  somename varchar(255) 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 #12861 hang with group_concat insubquery FROM DUAL
#
select * from (select group_concat('c') from DUAL) t;

#
# 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 concatenated 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 unsigned, 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.
#

set names latin1;
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');
select charset(a) from t2;
select charset(a) from t3;
drop table t1, t2, t3;
set names default;

#
# Bug#18281 group_concat changes charset to binary
#
create table t1 (c1 varchar(10), c2 int);
select charset(group_concat(c1 order by c2)) from t1;
drop table t1;

#
# Bug #16712: group_concat returns odd string instead of intended result
#
CREATE TABLE t1 (a INT(10), 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
#
set names utf8;
create table t1
(
  x text character set utf8 not null,
  y integer not null
);
insert into t1 values (repeat('a', 1022), 0), (repeat(_utf8 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;
set names latin1;

#
# Bug#14169 type of group_concat() result changed to blob if tmp_table was used
#
create table t1 (f1 int unsigned, 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 IGNORE INTO t3 VALUES( REPEAT( 'a', 65536 ), 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.
#
set names latin1;
create table t1 (id int, name varchar(20)) DEFAULT CHARSET=utf8;
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 #31154: group_concat() and bit fields;
#
create table t1(a bit not null);
insert ignore into t1 values (), (), ();
select group_concat(distinct a) from t1;
select group_concat(distinct a order by a) from t1;
drop table t1;

create table t1(a bit(2) not null);
insert into t1 values (1), (0), (0), (3), (1);
select group_concat(distinct a) from t1;
select group_concat(distinct a order by a) from t1;
select group_concat(distinct a order by a desc) from t1;
drop table t1;

create table t1(a bit(2), b varchar(10), c bit);
insert into t1 values (1, 'a', 0), (0, 'b', 1), (0, 'c', 0), (3, 'd', 1),
(1, 'e', 1), (3, 'f', 1), (0, 'g', 1);
select group_concat(distinct a, c) from t1;
select group_concat(distinct a, c order by a) from t1;
select group_concat(distinct a, c) from t1;
select group_concat(distinct a, c order by a, c) from t1;
select group_concat(distinct a, c order by a desc, c desc) from t1;

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
 GROUP BY 1
) AS s1;
DROP TABLE t1;

#
# Bug #35298: GROUP_CONCAT with DISTINCT can crash the server
#

CREATE TABLE t1 (a INT);
CREATE TABLE t2 (a INT);

INSERT INTO t1 VALUES(1);

SELECT GROUP_CONCAT(DISTINCT t2.a) FROM t1 LEFT JOIN t2 ON t2.a = t1.a GROUP BY t1.a;

DROP TABLE t1, t2;

#
# Bug #36024: group_concat distinct in subquery crash
#

CREATE TABLE t1 (a INT, KEY(a));
CREATE TABLE t2 (b INT);

INSERT INTO t1 VALUES (NULL), (8), (2);
INSERT INTO t2 VALUES (4), (10);

SELECT 1 FROM t1 WHERE t1.a NOT IN
(
  SELECT GROUP_CONCAT(DISTINCT t1.a)
  FROM  t1 WHERE t1.a IN   
  (
    SELECT b FROM t2
  ) 
  AND NOT t1.a >= (SELECT t1.a FROM t1 LIMIT 1)
  GROUP BY t1.a
);

DROP TABLE t1, t2;

#
# Bug #49487: crash with explain extended and group_concat in a derived table
#

CREATE TABLE t1 (f1 INT);
INSERT INTO t1 VALUES (),();

EXPLAIN EXTENDED SELECT 1 FROM
 (SELECT DISTINCT GROUP_CONCAT(td.f1) FROM t1,t1 AS td GROUP BY td.f1) AS d,t1;

SELECT 1 FROM
 (SELECT DISTINCT GROUP_CONCAT(td.f1) FROM t1,t1 AS td GROUP BY td.f1) AS d,t1;

DROP TABLE t1;

--echo End of 5.0 tests

--echo #
--echo # Bug #52397: another crash with explain extended and group_concat
--echo #
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (0), (0);
EXPLAIN EXTENDED SELECT 1 FROM
  (SELECT GROUP_CONCAT(t1.a ORDER BY t1.a ASC) FROM 
    t1 t2, t1 GROUP BY t1.a) AS d;
DROP TABLE t1;


--echo End of 5.0 tests


--echo #
--echo # Bug #54476: crash when group_concat and 'with rollup' in prepared statements
--echo # 

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

PREPARE stmt FROM "SELECT GROUP_CONCAT(t1.a ORDER BY t1.a) FROM t1 JOIN t1 t2 GROUP BY t1.a WITH ROLLUP";
EXECUTE stmt;
EXECUTE stmt;

DEALLOCATE PREPARE stmt;
DROP TABLE t1;

--echo #
--echo # Bug#57194 group_concat cause crash and/or invalid memory reads with type errors
--echo #

CREATE TABLE t1(f1 int);
INSERT INTO t1 values (0),(0);
--disable_ps_protocol
--error ER_ILLEGAL_PARAMETER_DATA_TYPE_FOR_OPERATION
SELECT POLYGON((SELECT 1 FROM (SELECT 1 IN (GROUP_CONCAT(t1.f1)) FROM t1, t1 t GROUP BY t.f1 ) d));
--enable_ps_protocol
DROP TABLE t1;

--echo #
--echo # Bug#58396 group_concat and explain extended are still crashy
--echo #

CREATE TABLE t1(a INT);
--error ER_UNKNOWN_ERROR
EXPLAIN EXTENDED SELECT UPDATEXML('1', a, '1')
FROM t1 ORDER BY (SELECT GROUP_CONCAT(1) FROM t1);
SHOW WARNINGS;
DROP TABLE t1;

--echo End of 5.1 tests


#
# Bug#36785: Wrong error message when group_concat() exceeds max length
#

--disable_warnings
DROP TABLE IF EXISTS t1, t2;
--enable_warnings

CREATE TABLE t1 (a VARCHAR(6), b INT);
CREATE TABLE t2 (a VARCHAR(6), b INT);

INSERT INTO t1 VALUES ('111111', 1);
INSERT INTO t1 VALUES ('222222', 2);
INSERT INTO t1 VALUES ('333333', 3);
INSERT INTO t1 VALUES ('444444', 4);
INSERT INTO t1 VALUES ('555555', 5);

SET group_concat_max_len = 5;
SET @old_sql_mode = @@sql_mode, @@sql_mode = 'traditional';

SELECT GROUP_CONCAT(a), b FROM t1 GROUP BY b LIMIT 3;
--error ER_CUT_VALUE_GROUP_CONCAT
INSERT INTO t2 SELECT GROUP_CONCAT(a), b FROM t1 GROUP BY b;
UPDATE t1 SET a = '11111' WHERE b = 1;
UPDATE t1 SET a = '22222' WHERE b = 2;
--error ER_CUT_VALUE_GROUP_CONCAT
INSERT INTO t2 SELECT GROUP_CONCAT(a), b FROM t1 GROUP BY b;

SET group_concat_max_len = DEFAULT;
SET @@sql_mode = @old_sql_mode;
DROP TABLE t1, t2;

#
# MDEV-3987 uninitialized read in Item_cond::fix_fields leads to crash: select .. where .. in ( select ... )
#
create table t1 (a char(1) character set utf8);
insert into t1 values ('a'),('b');
select 1 from t1 where a in (select group_concat(a) from t1);
drop table t1;

#
# MDEV-7820 Server crashes in in my_strcasecmp_utf8 on subquery in ORDER BY clause of GROUP_CONCAT
#
CREATE TABLE t1 (f1 VARCHAR(10)) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('a'),('b');

CREATE TABLE t2 (f2 VARCHAR(10)) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('c');

CREATE TABLE t3 (f3 VARCHAR(10)) ENGINE=MyISAM;
INSERT INTO t3 VALUES ('d'),('e');

SELECT GROUP_CONCAT( f2 ORDER BY ( f2 IN ( SELECT f1 FROM t1 WHERE f1 <= f2 ) ) ) AS field
FROM ( SELECT * FROM t2 ) AS sq2, t3
ORDER BY field;

drop table t3, t2, t1;

--echo #
--echo # MDEV-7821 - Server crashes in Item_func_group_concat::fix_fields on 2nd
--echo #             execution of PS
--echo #
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES(1),(2);
PREPARE stmt FROM "SELECT GROUP_CONCAT(t1a.a ORDER BY 1, t1a.a=0) FROM t1 AS t1a, t1 AS t1b GROUP BY t1a.a";
EXECUTE stmt;
EXECUTE stmt;
DROP TABLE t1;

--echo #
--echo #  WL#6098 Eliminate GROUP_CONCAT intermediate result limitation.
--echo #  Bug#13387020 GROUP_CONCAT WITH ORDER BY RESULTS ARE TRUNCATED.
--echo #


SET group_concat_max_len= 9999999;
CREATE TABLE t1 (f1 LONGTEXT , f2  INTEGER);
INSERT INTO t1 VALUES (REPEAT('a', 500000), 0), (REPEAT('b', 500000), 1), (REPEAT('c', 500000), 2);

SELECT LENGTH(GROUP_CONCAT(f1 ORDER BY f2)) FROM t1;
SELECT LENGTH(GROUP_CONCAT(DISTINCT f1 ORDER BY f1 DESC)) FROM t1;
SELECT SUBSTRING(GROUP_CONCAT(DISTINCT f1 ORDER BY f1 DESC), 1, 5) FROM t1;
SELECT LENGTH(GROUP_CONCAT(DISTINCT f1)) FROM t1;

SELECT LENGTH(GROUP_CONCAT(UPPER(f1) ORDER BY f2)) FROM t1;
SELECT LENGTH(GROUP_CONCAT(DISTINCT UPPER(f1) ORDER BY f1)) FROM t1;
SELECT SUBSTRING(GROUP_CONCAT(DISTINCT UPPER(f1) ORDER BY f1), 1, 5) FROM t1;
SELECT LENGTH(GROUP_CONCAT(DISTINCT UPPER(f1))) FROM t1;

CREATE TABLE t2 SELECT GROUP_CONCAT(f1 order by f2) FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;

CREATE TABLE t2 SELECT GROUP_CONCAT(UPPER(f1) ORDER BY f2) FROM t1;
SHOW CREATE TABLE t2;
DROP TABLE t2;

SET group_concat_max_len= 1024;
SELECT LENGTH(GROUP_CONCAT(f1 ORDER BY f2)) FROM t1;

SET group_concat_max_len= 499999;
SELECT LENGTH(GROUP_CONCAT(f1 ORDER BY f2)) FROM t1 WHERE f2 = 0;
SELECT LENGTH(GROUP_CONCAT(f1 ORDER BY f2)) FROM t1 GROUP BY f2;

INSERT INTO t1 VALUES (REPEAT('a', 499999), 3), (REPEAT('b', 500000), 4);
SELECT LENGTH(GROUP_CONCAT(f1 ORDER BY f2)) FROM t1 GROUP BY f2;

DROP TABLE t1;
SET group_concat_max_len= DEFAULT;

#
# MDEV-9531 GROUP_CONCAT with ORDER BY inside takes a lot of memory while it's executed
#
set session group_concat_max_len=1024;
set max_session_mem_used=16*1024*1024; # 8M..32M
SELECT GROUP_CONCAT(concat(seq/1.1), concat(seq/1.1), concat(seq/1.1), concat(seq/1.1), concat(seq/1.1), concat(seq/1.1), concat(seq/1.1), concat(seq/1.1) ORDER BY 2,1,3,4,6,5,8,7) AS c
FROM seq_1_to_200000;
set max_session_mem_used=default;
set session group_concat_max_len=default;

#
# MDEV-19350 Server crashes in delete_tree_element / ... / Item_func_group_concat::repack_tree
#
SET group_concat_max_len= 8;
CREATE TABLE t1 (a INT);
INSERT t1 VALUES (1),(2);
CREATE TABLE t2 (b DATE, c INT);
INSERT t2 VALUES ('2019-12-04',1),('2020-03-28',2);
CREATE TABLE t3 (d INT);
INSERT t3 VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11),(12),(13),(14);
CREATE TABLE t4 (e INT);
INSERT t4 VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11),(12),(13),(14),(15);
SELECT (SELECT MAX(a) FROM t1 WHERE t2_sq.c > 0) AS f,
       GROUP_CONCAT(t2_sq.b ORDER BY 1) AS gc
FROM (SELECT t2_a.* FROM t2 AS t2_a, t2 AS t2_b) AS t2_sq, t3, t4
GROUP BY f;
DROP TABLE t1, t2, t3, t4;
SET group_concat_max_len= default;


--echo #
--echo # Start of 10.2 tests
--echo #

--echo #
--echo # MDEV-10124 Incorrect usage of CUBE/ROLLUP and ORDER BY with GROUP_CONCAT(a ORDER BY a)
--echo #

CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (10),(20),(30);

SELECT a,GROUP_CONCAT(a ORDER BY a) FROM t1 GROUP BY a WITH ROLLUP;
CREATE VIEW v1 AS
SELECT a,GROUP_CONCAT(a ORDER BY a) FROM t1 GROUP BY a WITH ROLLUP;
SELECT * FROM v1;
DROP VIEW v1;

SELECT a,GROUP_CONCAT(a ORDER BY a) FROM t1 GROUP BY a WITH ROLLUP HAVING GROUP_CONCAT(a ORDER BY a)='10,20,30';
CREATE VIEW v1 AS
SELECT a,GROUP_CONCAT(a ORDER BY a) FROM t1 GROUP BY a WITH ROLLUP HAVING GROUP_CONCAT(a ORDER BY a)='10,20,30';
SELECT * FROM v1;
DROP VIEW v1;

SELECT * FROM (SELECT a,GROUP_CONCAT(a ORDER BY a) FROM t1 GROUP BY a WITH ROLLUP HAVING GROUP_CONCAT(a ORDER BY a)='10,20,30') t1;
CREATE VIEW v1 AS
SELECT * FROM (SELECT a,GROUP_CONCAT(a ORDER BY a) FROM t1 GROUP BY a WITH ROLLUP HAVING GROUP_CONCAT(a ORDER BY a)='10,20,30') t1;
SELECT * FROM v1;
DROP VIEW v1;

SELECT (SELECT GROUP_CONCAT(a ORDER BY a) FROM t1 GROUP BY a WITH ROLLUP HAVING GROUP_CONCAT(a ORDER BY a)='10,20,30');
CREATE VIEW v1 AS
SELECT (SELECT GROUP_CONCAT(a ORDER BY a) FROM t1 GROUP BY a WITH ROLLUP HAVING GROUP_CONCAT(a ORDER BY a)='10,20,30');
SELECT * FROM v1;
DROP VIEW v1;

DROP TABLE t1;

--echo #
--echo # End of 10.2 tests
--echo #


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

#
# MDEV-11297: Add support for LIMIT clause in GROUP_CONCAT()
#
--disable_warnings
drop table if exists t1, t2;
--enable_warnings

create table t1 (grp int, a bigint unsigned, c char(10) , d char(10) not null);
insert into t1 values (1,1,NULL,"a");
insert into t1 values (1,10,"b","a");
insert into t1 values (1,11,"c","a");
insert into t1 values (2,2,"c","a");
insert into t1 values (2,3,"b","b");
insert into t1 values (3,4,"E","a");
insert into t1 values (3,5,"C","b");
insert into t1 values (3,6,"D","c");
insert into t1 values (3,7,"E","c");


select grp,group_concat(c) from t1 group by grp;
select grp,group_concat(c limit 1  ) from t1 group by grp;
select grp,group_concat(c limit 1,1 ) from t1 group by grp;
select grp,group_concat(c limit 1,10 ) from t1 group by grp;
select grp,group_concat(c limit 1000) from t1 group by grp;
select group_concat(grp limit 0) from t1;
--error ER_PARSE_ERROR
select group_concat(grp limit "sdjadjs") from t1
--error ER_PARSE_ERROR
select grp,group_concat(c limit 5.5) from t1 group by grp ;
select grp,group_concat(distinct c limit 1,10 ) from t1 group by grp;
select grp,group_concat(c order by a) from t1 group by grp;
select grp,group_concat(c order by a limit 2 ) from t1 group by grp;
select grp,group_concat(c order by a limit 1,1 ) 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 limit 2) from t1 group by grp;
select grp,group_concat(c order by c desc) from t1 group by grp;
select grp,group_concat(c order by c desc limit 2) from t1 group by grp;

drop table t1;

create table t2 (a int, b varchar(10));
insert into t2 values(1,'a'),(1,'b'),(NULL,'c'),(2,'x'),(2,'y');
select group_concat(a,b limit 2) from t2;

set @x=4;
prepare STMT from 'select group_concat(b limit ?) from t2';
execute STMT using @x;
set @x=2;
execute STMT using @x;
set @x=1000;
execute STMT using @x;
set @x=0;
execute STMT using @x;
set @x="adasfa";
--error ER_INVALID_VALUE_TO_LIMIT
execute STMT using @x;
set @x=-1;
--error ER_WRONG_ARGUMENTS
execute STMT using @x;
set @x=4;
prepare STMT from 'select group_concat(a,b limit ?) from t2';
execute STMT using @x;
drop table t2;

--echo #
--echo # MDEV-18943: Group Concat with limit not working with views
--echo #

create table t1 (a int, b varchar(10));
insert into t1 values(1,'a'),(1,'b'),(NULL,'c'),(2,'x'),(2,'y');
select group_concat(a,b limit 2) from t1;
create view v1 as select group_concat(a,b limit 2) from t1;
select * from v1;
drop view v1;
drop table t1;

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