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drop table if exists t1, t2;
select null,\N,isnull(null),isnull(1/0),isnull(1/0 = null),ifnull(null,1),ifnull(null,"TRUE"),ifnull("TRUE","ERROR"),1/0 is null,1 is not null;
NULL NULL isnull(null) isnull(1/0) isnull(1/0 = null) ifnull(null,1) ifnull(null,"TRUE") ifnull("TRUE","ERROR") 1/0 is null 1 is not null
NULL NULL 1 1 1 1 TRUE TRUE 1 1
Warnings:
Error 1365 Division by 0
Error 1365 Division by 0
Error 1365 Division by 0
explain extended select null,\N,isnull(null),isnull(1/0),isnull(1/0 = null),ifnull(null,1),ifnull(null,"TRUE"),ifnull("TRUE","ERROR"),1/0 is null,1 is not null;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Error 1365 Division by 0
Error 1365 Division by 0
Error 1365 Division by 0
Note 1003 select NULL AS `NULL`,NULL AS `NULL`,isnull(NULL) AS `isnull(null)`,isnull((1 / 0)) AS `isnull(1/0)`,isnull(((1 / 0) = NULL)) AS `isnull(1/0 = null)`,ifnull(NULL,1) AS `ifnull(null,1)`,ifnull(NULL,'TRUE') AS `ifnull(null,"TRUE")`,ifnull('TRUE','ERROR') AS `ifnull("TRUE","ERROR")`,isnull((1 / 0)) AS `1/0 is null`,(1 is not null) AS `1 is not null`
select CONCAT(1, NULL),1+NULL,1-NULL;
CONCAT(1, NULL) 1+NULL 1-NULL
NULL NULL NULL
select NULL=NULL,NULL<>NULL,IFNULL(NULL,1.1)+0,CONCAT(IFNULL(NULL,1), 0);
NULL=NULL NULL<>NULL IFNULL(NULL,1.1)+0 CONCAT(IFNULL(NULL,1), 0)
NULL NULL 1.1 10
select strcmp("a",NULL),(1<NULL)+0.0,null like "a%","a%" like null;
strcmp("a",NULL) (1<NULL)+0.0 null like "a%" "a%" like null
NULL NULL NULL NULL
select concat("a",NULL),replace(NULL,"a","b"),replace("string","i",NULL),replace("string",NULL,"i"),insert("abc",1,1,NULL),left(NULL,1);
concat("a",NULL) replace(NULL,"a","b") replace("string","i",NULL) replace("string",NULL,"i") insert("abc",1,1,NULL) left(NULL,1)
NULL NULL NULL NULL NULL NULL
select repeat("a",0),repeat("ab",5+5),repeat("ab",-1),reverse(NULL);
repeat("a",0) repeat("ab",5+5) repeat("ab",-1) reverse(NULL)
abababababababababab NULL
select field(NULL,"a","b","c");
field(NULL,"a","b","c")
0
select 2 between null and 1,2 between 3 AND NULL,NULL between 1 and 2,2 between NULL and 3, 2 between 1 AND null;
2 between null and 1 2 between 3 AND NULL NULL between 1 and 2 2 between NULL and 3 2 between 1 AND null
0 0 NULL NULL NULL
explain extended select 2 between null and 1,2 between 3 AND NULL,NULL between 1 and 2,2 between NULL and 3, 2 between 1 AND null;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select (2 between NULL and 1) AS `2 between null and 1`,(2 between 3 and NULL) AS `2 between 3 AND NULL`,(NULL between 1 and 2) AS `NULL between 1 and 2`,(2 between NULL and 3) AS `2 between NULL and 3`,(2 between 1 and NULL) AS `2 between 1 AND null`
SELECT NULL AND NULL, 1 AND NULL, NULL AND 1, NULL OR NULL, 0 OR NULL, NULL OR 0;
NULL AND NULL 1 AND NULL NULL AND 1 NULL OR NULL 0 OR NULL NULL OR 0
NULL NULL NULL NULL NULL NULL
SELECT (NULL OR NULL) IS NULL;
(NULL OR NULL) IS NULL
1
select NULL AND 0, 0 and NULL;
NULL AND 0 0 and NULL
0 0
create table t1 (x int);
insert into t1 values (null);
select * from t1 where x != 0;
x
drop table t1;
CREATE TABLE t1 (
indexed_field int default NULL,
KEY indexed_field (indexed_field)
);
INSERT INTO t1 VALUES (NULL),(NULL);
SELECT * FROM t1 WHERE indexed_field=NULL;
indexed_field
SELECT * FROM t1 WHERE indexed_field IS NULL;
indexed_field
NULL
NULL
SELECT * FROM t1 WHERE indexed_field<=>NULL;
indexed_field
NULL
NULL
DROP TABLE t1;
create table t1 (a int, b int);
insert into t1 values(20,null);
select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
t2.b=t3.a;
b ifnull(t2.b,"this is null")
NULL this is null
select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
t2.b=t3.a order by 1;
b ifnull(t2.b,"this is null")
NULL this is null
insert into t1 values(10,null);
select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
t2.b=t3.a order by 1;
b ifnull(t2.b,"this is null")
NULL this is null
NULL this is null
drop table t1;
CREATE TABLE t1 (a varchar(16) NOT NULL default '', b int NOT NULL default 0, c datetime NOT NULL default '2009-02-10 00:00:00', d int NOT NULL default 0);
INSERT INTO t1 (a) values (null);
ERROR 23000: Column 'a' cannot be null
INSERT INTO t1 (a) values (1/null);
ERROR 23000: Column 'a' cannot be null
INSERT INTO t1 (a) values (null),(null);
ERROR 23000: Column 'a' cannot be null
INSERT INTO t1 (b) values (null);
ERROR 23000: Column 'b' cannot be null
INSERT INTO t1 (b) values (1/null);
ERROR 23000: Column 'b' cannot be null
INSERT INTO t1 (b) values (null),(null);
ERROR 23000: Column 'b' cannot be null
INSERT INTO t1 (c) values (null);
ERROR 23000: Column 'c' cannot be null
INSERT INTO t1 (c) values (1/null);
ERROR 23000: Column 'c' cannot be null
INSERT INTO t1 (c) values (null),(null);
ERROR 23000: Column 'c' cannot be null
INSERT INTO t1 (d) values (null);
ERROR 23000: Column 'd' cannot be null
INSERT INTO t1 (d) values (1/null);
ERROR 23000: Column 'd' cannot be null
INSERT INTO t1 (d) values (null),(null);
ERROR 23000: Column 'd' cannot be null
UPDATE t1 SET d= NULL;
INSERT INTO t1 VALUES ();
UPDATE t1 SET a=1/NULL;
ERROR 23000: Column 'a' cannot be null
UPDATE t1 SET a=NULL;
ERROR 23000: Column 'a' cannot be null
UPDATE t1 SET b=NULL;
ERROR 23000: Column 'b' cannot be null
UPDATE t1 SET c=NULL;
ERROR 23000: Column 'c' cannot be null
UPDATE t1 SET d=NULL;
ERROR 23000: Column 'd' cannot be null
truncate table t1;
LOAD DATA INFILE '../std_data_ln/null_test.txt' INTO TABLE t1 FIELDS ENCLOSED BY '"';
ERROR 22004: Column set to default value; NULL supplied to NOT NULL column 'a' at row 1
drop table t1;
create table t1 (a int not null, b int not null, index idx(a));
insert into t1 values
(1,1), (2,2), (3,3), (4,4), (5,5), (6,6),
(7,7), (8,8), (9,9), (10,10), (11,11), (12,12);
explain select * from t1 where a between 2 and 3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range idx idx 4 NULL 2 Using where
explain select * from t1 where a between 2 and 3 or b is null;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range idx idx 4 NULL 2 Using where
drop table t1;
create table t1 select
null as c00,
if(1, null, 'string') as c01,
if(0, null, 'string') as c02,
ifnull(null, 'string') as c03,
ifnull('string', null) as c04,
case when 0 then null else 'string' end as c05,
case when 1 then null else 'string' end as c06,
coalesce(null, 'string') as c07,
coalesce('string', null) as c08,
least('string',null) as c09,
least(null, 'string') as c10,
greatest('string',null) as c11,
greatest(null, 'string') as c12,
nullif('string', null) as c13,
nullif(null, 'string') as c14,
trim('string' from null) as c15,
trim(null from 'string') as c16,
substring_index('string', null, 1) as c17,
substring_index(null, 'string', 1) as c18,
elt(1, null, 'string') as c19,
elt(1, 'string', null) as c20,
concat('string', null) as c21,
concat(null, 'string') as c22,
concat_ws('sep', 'string', null) as c23,
concat_ws('sep', null, 'string') as c24,
concat_ws(null, 'string', 'string') as c25,
make_set(3, 'string', null) as c26,
make_set(3, null, 'string') as c27,
export_set(3, null, 'off', 'sep') as c29,
export_set(3, 'on', null, 'sep') as c30,
export_set(3, 'on', 'off', null) as c31,
replace(null, 'from', 'to') as c32,
replace('str', null, 'to') as c33,
replace('str', 'from', null) as c34,
insert('str', 1, 2, null) as c35,
insert(null, 1, 2, 'str') as c36,
lpad('str', 10, null) as c37,
rpad(null, 10, 'str') as c38;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`c00` varbinary(0) DEFAULT NULL,
`c01` varchar(6) DEFAULT NULL,
`c02` varchar(6) DEFAULT NULL,
`c03` varchar(6) NOT NULL,
`c04` varchar(6) DEFAULT NULL,
`c05` varchar(6) DEFAULT NULL,
`c06` varchar(6) DEFAULT NULL,
`c07` varchar(6) DEFAULT NULL,
`c08` varchar(6) DEFAULT NULL,
`c09` varchar(6) DEFAULT NULL,
`c10` varchar(6) DEFAULT NULL,
`c11` varchar(6) DEFAULT NULL,
`c12` varchar(6) DEFAULT NULL,
`c13` varchar(6) DEFAULT NULL,
`c14` varchar(0) DEFAULT NULL,
`c15` varchar(0) DEFAULT NULL,
`c16` varchar(6) DEFAULT NULL,
`c17` varchar(6) DEFAULT NULL,
`c18` varchar(0) DEFAULT NULL,
`c19` varchar(6) DEFAULT NULL,
`c20` varchar(6) DEFAULT NULL,
`c21` varchar(6) DEFAULT NULL,
`c22` varchar(6) DEFAULT NULL,
`c23` varchar(9) DEFAULT NULL,
`c24` varchar(9) DEFAULT NULL,
`c25` varchar(12) DEFAULT NULL,
`c26` varchar(7) DEFAULT NULL,
`c27` varchar(7) DEFAULT NULL,
`c29` varchar(381) DEFAULT NULL,
`c30` varchar(317) DEFAULT NULL,
`c31` varchar(192) DEFAULT NULL,
`c32` varchar(0) DEFAULT NULL,
`c33` varchar(3) DEFAULT NULL,
`c34` varchar(3) DEFAULT NULL,
`c35` varchar(3) DEFAULT NULL,
`c36` varchar(3) DEFAULT NULL,
`c37` varchar(10) DEFAULT NULL,
`c38` varchar(10) DEFAULT NULL
) ENGINE=DEFAULT
drop table t1;
select
case 'str' when 'STR' then 'str' when null then 'null' end as c01,
case 'str' when null then 'null' when 'STR' then 'str' end as c02,
field(null, 'str1', 'str2') as c03,
field('str1','STR1', null) as c04,
field('str1', null, 'STR1') as c05,
'string' in ('STRING', null) as c08,
'string' in (null, 'STRING') as c09;
c01 c02 c03 c04 c05 c08 c09
str str 0 1 2 1 1
# End of 4.1 tests
#
# Bug #31471: decimal_bin_size: Assertion `scale >= 0 &&
# precision > 0 && scale <= precision'
#
CREATE TABLE t1 (a DECIMAL (1, 0) , b DECIMAL (1, 0) );
INSERT INTO t1 (a, b) VALUES (0, 0);
CREATE TABLE t2 SELECT IFNULL(a, b) FROM t1;
DESCRIBE t2;
Field Type Null Default Default_is_NULL On_Update
IFNULL(a, b) DECIMAL TRUE TRUE
DROP TABLE t2;
CREATE TABLE t2 SELECT IFNULL(a, NULL) FROM t1;
DESCRIBE t2;
Field Type Null Default Default_is_NULL On_Update
IFNULL(a, NULL) DECIMAL TRUE TRUE
DROP TABLE t2;
CREATE TABLE t2 SELECT IFNULL(NULL, b) FROM t1;
DESCRIBE t2;
Field Type Null Default Default_is_NULL On_Update
IFNULL(NULL, b) DECIMAL TRUE TRUE
DROP TABLE t1, t2;
# End of 5.0 tests
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