mirror of
https://github.com/MariaDB/server.git
synced 2025-10-31 15:50:51 +03:00
75 lines
1.8 KiB
Plaintext
75 lines
1.8 KiB
Plaintext
#
|
|
# Init section
|
|
#
|
|
--disable_warnings
|
|
drop table if exists t1;
|
|
--enable_warnings
|
|
|
|
#
|
|
# Simple IF tests
|
|
#
|
|
|
|
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 ;
|
|
|
|
#
|
|
# Test of IF and case-sensitiveness
|
|
#
|
|
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;
|
|
select if(u=1,st,st) s from t1 order by s;
|
|
select if(u=1,binary st,st) s from t1 order by s;
|
|
select if(u=1,st,binary st) s from t1 where st like "%a%" order by s;
|
|
explain extended select if(u=1,st,binary st) s from t1 where st like "%a%" order by s;
|
|
|
|
#
|
|
# NULLIF test
|
|
#
|
|
select nullif(u=0, 'test') from t1;
|
|
explain extended select nullif(u=0, 'test') from t1;
|
|
drop table t1;
|
|
|
|
#
|
|
# Bug 2629
|
|
#
|
|
select NULLIF(NULL,NULL), NULLIF(NULL,1), NULLIF(NULL,1.0), NULLIF(NULL,"test");
|
|
select NULLIF(1,NULL), NULLIF(1.0, NULL), NULLIF("test", NULL);
|
|
|
|
#
|
|
# Problem with IF()
|
|
#
|
|
|
|
create table t1 (num double(12,2));
|
|
insert into t1 values (144.54);
|
|
select sum(if(num is null,0.00,num)) from t1;
|
|
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;
|
|
drop table t1;
|
|
|
|
#
|
|
# BUG#3987
|
|
#
|
|
create table t1 (a int);
|
|
insert t1 values (1),(2);
|
|
select if(1>2,a,avg(a)) from t1;
|
|
drop table t1;
|
|
|
|
#
|
|
# Bug #5595 NULLIF() IS NULL returns false if NULLIF() returns NULL
|
|
#
|
|
SELECT NULLIF(5,5) IS NULL, NULLIF(5,5) IS NOT NULL;
|
|
|
|
#
|
|
# Test for bug #11142: evaluation of NULLIF when the first argument is NULL
|
|
#
|
|
|
|
CREATE TABLE t1 (a CHAR(10));
|
|
INSERT INTO t1 VALUES ('aaa'), (NULL), (''), ('bbb');
|
|
|
|
SELECT a, NULLIF(a,'') FROM t1;
|
|
SELECT a, NULLIF(a,'') FROM t1 WHERE NULLIF(a,'') IS NULL;
|
|
|
|
DROP TABLE t1;
|