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DROP TABLE IF EXISTS t1;
CREATE TABLE t1 ( number INT NOT NULL, alpha CHAR(6) NOT NULL );
INSERT INTO t1 VALUES (1413006,'idlfmv'),
(1413065,'smpsfz'),(1413127,'sljrhx'),(1413304,'qerfnd');
SELECT number, alpha, CONCAT_WS('<---->',number,alpha) AS new
FROM t1 GROUP BY number;
number alpha new
1413006 idlfmv 1413006<---->idlfmv
1413065 smpsfz 1413065<---->smpsfz
1413127 sljrhx 1413127<---->sljrhx
1413304 qerfnd 1413304<---->qerfnd
SELECT CONCAT_WS('<---->',number,alpha) AS new
FROM t1 GROUP BY new LIMIT 1;
new
1413006<---->idlfmv
SELECT number, alpha, CONCAT_WS('<->',number,alpha) AS new
FROM t1 GROUP BY new LIMIT 1;
number alpha new
1413006 idlfmv 1413006<->idlfmv
SELECT number, alpha, CONCAT_WS('-',number,alpha,alpha,alpha,alpha,alpha,alpha,alpha) AS new
FROM t1 GROUP BY new LIMIT 1;
number alpha new
1413006 idlfmv 1413006-idlfmv-idlfmv-idlfmv-idlfmv-idlfmv-idlfmv-idlfmv
SELECT number, alpha, CONCAT_WS('<------------------>',number,alpha) AS new
FROM t1 GROUP BY new LIMIT 1;
number alpha new
1413006 idlfmv 1413006<------------------>idlfmv
drop table t1;
create table t1 (a char(4), b double, c date, d tinyint(4));
insert into t1 values ('AAAA', 105, '2003-03-01', 1);
select * from t1 where concat(A,C,B,D) = 'AAAA2003-03-011051';
a b c d
AAAA 105 2003-03-01 1
drop table t1;
select 'a' union select concat('a', -4);
a
a
a-4
select 'a' union select concat('a', -4.5);
a
a
a-4.5
select 'a' union select concat('a', -(4 + 1));
a
a
a-5
select 'a' union select concat('a', 4 - 5);
a
a
a-1
select 'a' union select concat('a', -'3');
a
a
a-3
select 'a' union select concat('a', -concat('3',4));
a
a
a-34
select 'a' union select concat('a', -0);
a
a
a0
select 'a' union select concat('a', -0.0);
a
a
a0.0
select 'a' union select concat('a', -0.0000);
a
a
a0.0000
select concat((select x from (select 'a' as x) as t1 ),
(select y from (select 'b' as y) as t2 )) from (select 1 union select 2 )
as t3;
concat((select x from (select 'a' as x) as t1 ),
(select y from (select 'b' as y) as t2 ))
ab
ab
create table t1(f1 varchar(6)) charset=utf8;
insert into t1 values ("123456");
select concat(f1, 2) a from t1 union select 'x' a from t1;
a
1234562
x
drop table t1;
CREATE TABLE t1 (c1 varchar(100), c2 varchar(100));
INSERT INTO t1 VALUES ('',''), ('','First'), ('Random','Random');
SELECT * FROM t1 WHERE CONCAT(c1,' ',c2) REGEXP 'First.*';
c1 c2
First
DROP TABLE t1;
# End of 5.0 tests
#
# Bug #44743: Join in combination with concat does not always work
#
CREATE TABLE t1 (
a VARCHAR(100) NOT NULL DEFAULT '0',
b VARCHAR(2) NOT NULL DEFAULT '',
c VARCHAR(2) NOT NULL DEFAULT '',
d TEXT NOT NULL,
PRIMARY KEY (a, b, c),
KEY (a)
) DEFAULT CHARSET=utf8;
INSERT INTO t1 VALUES ('gui_A', 'a', 'b', 'str1'),
('gui_AB', 'a', 'b', 'str2'), ('gui_ABC', 'a', 'b', 'str3');
CREATE TABLE t2 (
a VARCHAR(100) NOT NULL DEFAULT '',
PRIMARY KEY (a)
) DEFAULT CHARSET=latin1;
INSERT INTO t2 VALUES ('A'), ('AB'), ('ABC');
SELECT CONCAT('gui_', t2.a), t1.d FROM t2
LEFT JOIN t1 ON t1.a = CONCAT('gui_', t2.a) AND t1.b = 'a' AND t1.c = 'b';
CONCAT('gui_', t2.a) d
gui_A str1
gui_AB str2
gui_ABC str3
EXPLAIN SELECT CONCAT('gui_', t2.a), t1.d FROM t2
LEFT JOIN t1 ON t1.a = CONCAT('gui_', t2.a) AND t1.b = 'a' AND t1.c = 'b';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index NULL PRIMARY 102 NULL 3 Using index
1 SIMPLE t1 eq_ref PRIMARY,a PRIMARY 318 func,const,const 1
DROP TABLE t1, t2;
# End of 5.1 tests
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