drop table if exists t1;
CREATE TABLE t1 (id CHAR(12) not null, PRIMARY KEY (id));
insert into t1 values ('000000000001'),('000000000002');
explain select * from t1 where id=000000000001;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	PRIMARY	PRIMARY	12	NULL	2	Using where; Using index
select * from t1 where id=000000000001;
id
000000000001
delete from t1 where id=000000000002;
select * from t1;
id
000000000001
drop table t1;
SELECT 'a' = 'a ';
'a' = 'a '
1
SELECT 'a\0' < 'a';
'a\0' < 'a'
1
SELECT 'a\0' < 'a ';
'a\0' < 'a '
1
SELECT 'a\t' < 'a';
'a\t' < 'a'
1
SELECT 'a\t' < 'a ';
'a\t' < 'a '
1
CREATE TABLE t1 (a char(10) not null);
INSERT INTO t1 VALUES ('a'),('a\0'),('a\t'),('a ');
SELECT hex(a),STRCMP(a,'a'), STRCMP(a,'a ') FROM t1;
hex(a)	STRCMP(a,'a')	STRCMP(a,'a ')
61	0	0
6100	-1	-1
6109	-1	-1
61	0	0
DROP TABLE t1;
SELECT CHAR(31) = '', '' = CHAR(31);
CHAR(31) = ''	'' = CHAR(31)
0	0
SELECT CHAR(30) = '', '' = CHAR(30);
CHAR(30) = ''	'' = CHAR(30)
0	0
create table t1 (a tinyint(1),b binary(1));
insert into t1 values (0x01,0x01);
select * from t1 where a=b;
a	b
Warnings:
Warning	1292	Truncated incorrect DOUBLE value: '
'
select * from t1 where a=b and b=0x01;
a	b
Warnings:
Warning	1292	Truncated incorrect DOUBLE value: '
'
drop table if exists t1;
CREATE TABLE  t1 (b int(2) zerofill, c int(2) zerofill);
INSERT INTO t1 (b,c) VALUES (1,2), (1,1), (2,2);
SELECT CONCAT(b,c), CONCAT(b,c) = '0101' FROM t1;
CONCAT(b,c)	CONCAT(b,c) = '0101'
0102	0
0101	1
0202	0
EXPLAIN EXTENDED SELECT b,c FROM t1 WHERE b = 1 AND CONCAT(b,c) = '0101';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where ((`test`.`t1`.`b` = 1) and (concat('01',`test`.`t1`.`c`) = '0101'))
SELECT b,c FROM t1 WHERE b = 1 AND CONCAT(b,c) = '0101';
b	c
01	01
CREATE TABLE t2 (a int);
INSERT INTO t2 VALUES (1),(2);
SELECT a, 
(SELECT COUNT(*) FROM t1 
WHERE b = t2.a AND CONCAT(b,c) = CONCAT('0',t2.a,'01')) x 
FROM t2 ORDER BY a;
a	x
1	1
2	0
EXPLAIN EXTENDED 
SELECT a, 
(SELECT COUNT(*) FROM t1 
WHERE b = t2.a AND CONCAT(b,c) = CONCAT('0',t2.a,'01')) x 
FROM t2 ORDER BY a;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using filesort
2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
Warnings:
Note	1276	Field or reference 'test.t2.a' of SELECT #2 was resolved in SELECT #1
Note	1276	Field or reference 'test.t2.a' of SELECT #2 was resolved in SELECT #1
Note	1003	select `test`.`t2`.`a` AS `a`,(select count(0) AS `COUNT(*)` from `test`.`t1` where ((`test`.`t1`.`b` = `test`.`t2`.`a`) and (concat(`test`.`t1`.`b`,`test`.`t1`.`c`) = concat('0',`test`.`t2`.`a`,'01')))) AS `x` from `test`.`t2` order by `test`.`t2`.`a`
DROP TABLE t1,t2;
End of 5.0 tests