drop table if exists t1;
select IF(0,"ERROR","this"),IF(1,"is","ERROR"),IF(NULL,"ERROR","a"),IF(1,2,3)|0,IF(1,2.0,3.0)+0 ;
IF(0,"ERROR","this")	IF(1,"is","ERROR")	IF(NULL,"ERROR","a")	IF(1,2,3)|0	IF(1,2.0,3.0)+0
this	is	a	2	2.0
CREATE TABLE t1 (st varchar(255) NOT NULL, u int(11) NOT NULL) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('a',1),('A',1),('aa',1),('AA',1),('a',1),('aaa',0),('BBB',0);
select if(1,st,st) s from t1 order by s;
s
a
A
a
aa
AA
aaa
BBB
select if(u=1,st,st) s from t1 order by s;
s
a
A
a
aa
AA
aaa
BBB
select if(u=1,binary st,st) s from t1 order by s;
s
A
AA
BBB
a
a
aa
aaa
select if(u=1,st,binary st) s from t1 where st like "%a%" order by s;
s
A
AA
a
a
aa
aaa
explain extended select if(u=1,st,binary st) s from t1 where st like "%a%" order by s;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	7	100.00	Using where; Using filesort
Warnings:
Note	1003	select if(`test`.`t1`.`u` = 1,`test`.`t1`.`st`,cast(`test`.`t1`.`st` as char charset binary)) AS `s` from `test`.`t1` where `test`.`t1`.`st` like '%a%' order by if(`test`.`t1`.`u` = 1,`test`.`t1`.`st`,cast(`test`.`t1`.`st` as char charset binary))
select nullif(u, 1) from t1;
nullif(u, 1)
NULL
NULL
NULL
NULL
NULL
0
0
explain extended select nullif(u, 1) from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	7	100.00	
Warnings:
Note	1003	select nullif(`test`.`t1`.`u`,1) AS `nullif(u, 1)` from `test`.`t1`
drop table t1;
select nullif(1,'test');
nullif(1,'test')
1
Warnings:
Warning	1292	Truncated incorrect DECIMAL value: 'test'
select NULLIF(NULL,NULL), NULLIF(NULL,1), NULLIF(NULL,1.0), NULLIF(NULL,"test");
NULLIF(NULL,NULL)	NULLIF(NULL,1)	NULLIF(NULL,1.0)	NULLIF(NULL,"test")
NULL	NULL	NULL	NULL
select NULLIF(1,NULL), NULLIF(1.0, NULL), NULLIF("test", NULL);
NULLIF(1,NULL)	NULLIF(1.0, NULL)	NULLIF("test", NULL)
1	1.0	test
create table t1 (num  double(12,2));
insert into t1 values (144.54);
select sum(if(num is null,0.00,num)) from t1;
sum(if(num is null,0.00,num))
144.54
drop table t1;
create table t1 (x int, y int);
insert into t1 values (0,6),(10,16),(20,26),(30,10),(40,46),(50,56);
select min(if(y -x > 5,y,NULL)), max(if(y - x > 5,y,NULL)) from t1;
min(if(y -x > 5,y,NULL))	max(if(y - x > 5,y,NULL))
6	56
drop table t1;
create table t1 (a int);
insert t1 values (1),(2);
select if(1>2,a,avg(a)) from t1;
if(1>2,a,avg(a))
1.5000
drop table t1;
SELECT NULLIF(5,5) IS NULL, NULLIF(5,5) IS NOT NULL;
NULLIF(5,5) IS NULL	NULLIF(5,5) IS NOT NULL
1	0
CREATE TABLE `t1` (
`id` int(11) NOT NULL ,
`date` int(10) default NULL,
`text` varchar(32) NOT NULL
);
INSERT INTO t1 VALUES (1,1110000000,'Day 1'),(2,1111000000,'Day 2'),(3,1112000000,'Day 3');
SELECT id, IF(date IS NULL, '-', FROM_UNIXTIME(date, '%d-%m-%Y')) AS date_ord, text FROM t1 ORDER BY date_ord ASC;
id	date_ord	text
1	05-03-2005	Day 1
2	16-03-2005	Day 2
3	28-03-2005	Day 3
SELECT id, IF(date IS NULL, '-', FROM_UNIXTIME(date, '%d-%m-%Y')) AS date_ord, text FROM t1 ORDER BY date_ord DESC;
id	date_ord	text
3	28-03-2005	Day 3
2	16-03-2005	Day 2
1	05-03-2005	Day 1
DROP TABLE t1;
CREATE TABLE t1 (a CHAR(10));
INSERT INTO t1 VALUES ('aaa'), (NULL), (''), ('bbb');
SELECT a, NULLIF(a,'') FROM t1;
a	NULLIF(a,'')
aaa	aaa
NULL	NULL
	NULL
bbb	bbb
SELECT a, NULLIF(a,'') FROM t1 WHERE NULLIF(a,'') IS NULL;
a	NULLIF(a,'')
NULL	NULL
	NULL
DROP TABLE t1;
create table t1 (f1 int, f2 int);
insert into t1 values(1,1),(0,0);
select f1, f2, if(f1, 40.0, 5.00) from t1 group by f1 order by f2;
f1	f2	if(f1, 40.0, 5.00)
0	0	5.00
1	1	40.00
drop table t1;
select if(0, 18446744073709551610, 18446744073709551610);
if(0, 18446744073709551610, 18446744073709551610)
18446744073709551610
CREATE TABLE t1(a DECIMAL(10,3));
SELECT t1.a,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,
IF((ROUND(t1.a,2)=1), 2,0)))))))))))))))))))))))))))))) + 1 as exp
FROM t1;
a	exp
DROP TABLE t1;
CREATE TABLE t1 (c LONGTEXT);
INSERT INTO t1 VALUES(1), (2), (3), (4), ('1234567890123456789');
SELECT IF(1, CAST(c AS UNSIGNED), 0) FROM t1;
IF(1, CAST(c AS UNSIGNED), 0)
1
2
3
4
1234567890123456789
SELECT * FROM (SELECT MAX(IF(1, CAST(c AS UNSIGNED), 0)) FROM t1) AS te;
MAX(IF(1, CAST(c AS UNSIGNED), 0))
1234567890123456789
SELECT * FROM (SELECT MAX(IFNULL(CAST(c AS UNSIGNED), 0)) FROM t1) AS te;
MAX(IFNULL(CAST(c AS UNSIGNED), 0))
1234567890123456789
DROP TABLE t1;
End of 5.0 tests
#
# Bug#55077: Assertion failed: width > 0 && to != ((void *)0), file .\dtoa.c
# 
CREATE TABLE t1 (a LONGBLOB, b DOUBLE);
INSERT INTO t1 VALUES (NULL, 0), (NULL, 1);
SELECT IF(b, (SELECT a FROM t1 LIMIT 1), b) c FROM t1 GROUP BY c;
c
NULL
0
DROP TABLE t1;
#
# Bug#12532830 
# SIGFPE OR ASSERTION (PRECISION <= ((9 * 9) - 8*2)) && (DEC <= 30)
#
select
sum(distinct(if('a',
(select adddate(elt(convert(9999999999999999999999999999999999999,decimal(64,0)),count(*)),
interval 1 day))
, .1))) as foo;
foo
0.1
Warnings:
Warning	1292	Truncated incorrect DOUBLE value: 'a'
Warning	1292	Truncated incorrect DOUBLE value: 'a'
#
# LP bug#998321 Simple query with IF expression causes an
# assertion abort (see also mysql Bug#12620084)
#
SELECT if(0, (SELECT min('hello')), NULL);
if(0, (SELECT min('hello')), NULL)
NULL
SELECT if(1, (SELECT min('hello')), NULL);
if(1, (SELECT min('hello')), NULL)
hello
SELECT if(0, NULL, (SELECT min('hello')));
if(0, NULL, (SELECT min('hello')))
hello
SELECT if(1, NULL, (SELECT min('hello')));
if(1, NULL, (SELECT min('hello')))
NULL
End of 5.2 tests
#
# MDEV-8663: IF Statement returns multiple values erroneously
# (or Assertion `!null_value' failed in Item::send(Protocol*, String*)
#
CREATE TABLE `t1` (
`datas` VARCHAR(25) NOT NULL
) DEFAULT CHARSET=utf8;
INSERT INTO `t1` VALUES ('1,2'), ('2,3'), ('3,4');
SELECT IF(FIND_IN_SET('1', `datas`), 1.5, IF(FIND_IN_SET('2', `datas`), 2, NULL)) AS `First`, '1' AS `Second`, '2' AS `Third` FROM `t1`;
First	Second	Third
1.5	1	2
2.0	1	2
NULL	1	2
drop table t1;