mariadb/mysql-test/r/func_concat.result

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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
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a0.0
select 'a' union select concat('a', -0.0000);
a
a
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a0.0000
Fixed bug#16716: subselect in concat() may lead to a wrong result. The Item_func_concat::val_str() function tries to make as less re-allocations as possible. This results in appending strings returned by 2nd and next arguments to the string returned by 1st argument if the buffer for the first argument has enough free space. A constant subselect is evaluated only once and its result is stored in an Item_cache_str. In the case when the first argument of the concat() function is such a subselect Item_cache_str returns the stored value and Item_func_concat::val_str() append values of other arguments to it. But for the next row the value in the Item_cache_str isn't restored because the subselect is a constant one and it isn't evaluated second time. This results in appending string values of 2nd and next arguments to the result of the previous Item_func_concat::val_str() call. The Item_func_concat::val_str() function now checks whether the first argument is a constant one and if so it doesn't append values of 2nd and next arguments to the string value returned by it. mysql-test/t/func_concat.test: Added test case for bug#16716: subselect in concat() may lead to a wrong result. mysql-test/r/func_concat.result: Added test case for bug#16716: subselect in concat() may lead to a wrong result. sql/item_strfunc.cc: Fixed bug#16716: subselect in concat() may lead to a wrong result. The Item_func_concat::val_str() function now checks whether the first argument is a constant one and if so it doesn't append values of 2nd and next arguments to the string value returned by it.
2006-05-25 23:24:14 +02:00
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
Fix for bug#44743: Join in combination with concat does not always work bug#44766: valgrind error when using convert() in a subquery Problem: input and output buffers may be the same converting a string to some charset. That may lead to wrong results/valgrind warnings. Fix: use different buffers. mysql-test/r/cast.result: Fix for bug#44743: Join in combination with concat does not always work bug#44766: valgrind error when using convert() in a subquery - test result. mysql-test/r/func_concat.result: Fix for bug#44743: Join in combination with concat does not always work bug#44766: valgrind error when using convert() in a subquery - test result. mysql-test/t/cast.test: Fix for bug#44743: Join in combination with concat does not always work bug#44766: valgrind error when using convert() in a subquery - test case. mysql-test/t/func_concat.test: Fix for bug#44743: Join in combination with concat does not always work bug#44766: valgrind error when using convert() in a subquery - test case. sql/item.cc: Fix for bug#44743: Join in combination with concat does not always work bug#44766: valgrind error when using convert() in a subquery - comment added. sql/item_strfunc.cc: Fix for bug#44743: Join in combination with concat does not always work bug#44766: valgrind error when using convert() in a subquery - '&args[0]->str_value' used as a parameter of args[0]->val_str(), as 'str' may be equal to 'str_value' which we use as the output buffer converting strings. sql/sql_string.cc: Fix for bug#44743: Join in combination with concat does not always work bug#44766: valgrind error when using convert() in a subquery - input and output buffers must NOT be the same.
2009-05-21 10:06:43 +02:00
#
# 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