5
drop table if exists t1;
12
select IF(0,"ERROR","this"),IF(1,"is","ERROR"),IF(NULL,"ERROR","a"),IF(1,2.0,3.0)+0 ;
15
# Test of IF and case-sensitiveness
17
CREATE TABLE t1 (st varchar(255) NOT NULL, u int NOT NULL) ENGINE=MyISAM;
18
INSERT INTO t1 VALUES ('a',1),('A',1),('aa',1),('AA',1),('a',1),('aaa',0),('BBB',0);
19
select if(1,st,st) s from t1 order by s;
20
select if(u=1,st,st) s from t1 order by s;
21
select if(u=1,binary st,st) s from t1 order by s;
22
select if(u=1,st,binary st) s from t1 where st like "%a%" order by s;
23
explain extended select if(u=1,st,binary st) s from t1 where st like "%a%" order by s;
28
select nullif(u, 1) from t1;
29
explain extended select nullif(u, 1) from t1;
31
select nullif(1,'test');
36
select NULLIF(NULL,NULL), NULLIF(NULL,1), NULLIF(NULL,1.0), NULLIF(NULL,"test");
37
select NULLIF(1,NULL), NULLIF(1.0, NULL), NULLIF("test", NULL);
43
create table t1 (num double(12,2));
44
insert into t1 values (144.54);
45
select sum(if(num is null,0.00,num)) from t1;
47
create table t1 (x int, y int);
48
insert into t1 values (0,6),(10,16),(20,26),(30,10),(40,46),(50,56);
49
select min(if(y -x > 5,y,NULL)), max(if(y - x > 5,y,NULL)) from t1;
55
create table t1 (a int);
56
insert t1 values (1),(2);
57
select if(1>2,a,avg(a)) from t1;
61
# Bug #5595 NULLIF() IS NULL returns false if NULLIF() returns NULL
63
SELECT NULLIF(5,5) IS NULL, NULLIF(5,5) IS NOT NULL;
66
# Bug #9669 Ordering on IF function with FROM_UNIXTIME function fails
70
`date` int default NULL,
71
`text` varchar(32) NOT NULL
73
INSERT INTO t1 VALUES (1,1110000000,'Day 1'),(2,1111000000,'Day 2'),(3,1112000000,'Day 3');
74
SELECT id, IF(date IS NULL, '-', FROM_UNIXTIME(date, '%d-%m-%Y')) AS date_ord, text FROM t1 ORDER BY date_ord ASC;
75
SELECT id, IF(date IS NULL, '-', FROM_UNIXTIME(date, '%d-%m-%Y')) AS date_ord, text FROM t1 ORDER BY date_ord DESC;
80
# Test for bug #11142: evaluation of NULLIF when the first argument is NULL
83
CREATE TABLE t1 (a CHAR(10));
84
INSERT INTO t1 VALUES ('aaa'), (NULL), (''), ('bbb');
86
SELECT a, NULLIF(a,'') FROM t1;
87
SELECT a, NULLIF(a,'') FROM t1 WHERE NULLIF(a,'') IS NULL;
94
# Bug #16272 IF function with decimal args can produce wrong result
96
create table t1 (f1 int, f2 int);
97
insert into t1 values(1,1),(0,0);
98
select f1, f2, if(f1, 40.0, 5.00) from t1 group by f1 order by f2;
102
# Bug#24532 (The return data type of IS TRUE is different from similar
108
select if(0, 18446744073709551610, 18446744073709551610);