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mariadb/mysql-test/t/func_gconcat.test
unknown a2066982f1 Fixed bug#14169: type of group_concat() result changed to blob if tmp_table was 
used

In a simple queries a result of the GROUP_CONCAT() function was always of 
varchar type.
But if length of GROUP_CONCAT() result is greater than 512 chars and temporary
table is used during select then the result is converted to blob, due to
policy to not to store fields longer than 512 chars in tmp table as varchar
fields.

In order to provide consistent behaviour, result of GROUP_CONCAT() now
will always be converted to blob if it is longer than 512 chars.
Item_func_group_concat::field_type() is modified accordingly.


mysql-test/t/func_gconcat.test:
  Added test case for bug#14169: type of group_concat() result changed to blob if tmp_table was used
mysql-test/r/func_gconcat.result:
  Added test case for bug#14169: type of group_concat() result changed to blob if tmp_table was used
sql/unireg.h:
  Added the CONVERT_IF_BIGGER_TO_BLOB constant
sql/sql_select.cc:
  Fixed bug#14169: type of group_concat() result changed to blob if tmp_table was used
  The unnamed constant 255 in the create_tmp_field() and create_tmp_field_from_item() functions now defined as the CONVERT_IF_BIGGER_TO_BLOB constant.
  The create_tmp_field() function now converts the Item_sum string result to a blob field based on its char length.
sql/item_sum.h:
  Fixed bug#14169: type of group_concat() result changed to blob if tmp_table was used
  To the Item_func_group_concat calls added the member function field_type() which returns the BLOB or VAR_STRING type based on the items length.
sql/item_func.cc:
  Fixed bug#14169: type of group_concat() result changed to blob if tmp_table was used
  In the Item_func::tmp_table_field() function the unnamed constant 255 is changed to the CONVERT_IF_BIGGER_TO_BLOB constant.
  The Item_func::tmp_table_field() function now measures the result length in chars rather than bytes when converting string result to a blob.
2006-04-12 23:05:38 +04:00

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#
# simple test of group_concat function
#
--disable_warnings
drop table if exists t1, t2;
--enable_warnings
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;
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;
select grp,group_concat(c order by 1) from t1 group by grp;
select grp,group_concat(c order by "c") 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(a)) 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
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 group_concat(c order by a) from t2 where t2.a=t1.a)) as grp from t1;
# select group_concat(c order by (select 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 ('<27>');
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 #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 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 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;
select f2,group_concat(f1) from t1 group by f2 order by 2;
--disable_metadata
# End of 4.1 tests
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