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https://github.com/MariaDB/server.git
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86 lines
2.7 KiB
Plaintext
86 lines
2.7 KiB
Plaintext
# Initialise
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--disable_warnings
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drop table if exists t1;
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--enable_warnings
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#
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# Testing of NULL in a lot of different places
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#
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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;
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select 1 | NULL,1 & NULL,1+NULL,1-NULL;
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select NULL=NULL,NULL<>NULL,IFNULL(NULL,1.1)+0,IFNULL(NULL,1) | 0;
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select strcmp("a",NULL),(1<NULL)+0.0,NULL regexp "a",null like "a%","a%" like null;
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select concat("a",NULL),replace(NULL,"a","b"),replace("string","i",NULL),replace("string",NULL,"i"),insert("abc",1,1,NULL),left(NULL,1);
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select repeat("a",0),repeat("ab",5+5),repeat("ab",-1),reverse(NULL);
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select field(NULL,"a","b","c");
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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;
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SELECT NULL AND NULL, 1 AND NULL, NULL AND 1, NULL OR NULL, 0 OR NULL, NULL OR 0;
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SELECT (NULL OR NULL) IS NULL;
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select NULL AND 0, 0 and NULL;
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select inet_ntoa(null),inet_aton(null),inet_aton("122.256"),inet_aton("122.226."),inet_aton("");
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create table t1 (x int);
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insert into t1 values (null);
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select * from t1 where x != 0;
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drop table t1;
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#
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# Test problem med index on NULL columns and testing with =NULL;
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#
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CREATE TABLE t1 (
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indexed_field int default NULL,
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KEY indexed_field (indexed_field)
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);
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INSERT INTO t1 VALUES (NULL),(NULL);
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SELECT * FROM t1 WHERE indexed_field=NULL;
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SELECT * FROM t1 WHERE indexed_field IS NULL;
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SELECT * FROM t1 WHERE indexed_field<=>NULL;
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DROP TABLE t1;
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#
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# Testing of IFNULL
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#
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create table t1 (a int, b int) type=myisam;
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insert into t1 values(20,null);
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select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
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t2.b=t3.a;
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select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
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t2.b=t3.a order by 1;
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insert into t1 values(10,null);
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select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
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t2.b=t3.a order by 1;
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drop table t1;
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#
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# Test inserting and updating with NULL
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#
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CREATE TABLE t1 (a varchar(16) NOT NULL, b smallint(6) NOT NULL, c datetime NOT NULL, d smallint(6) NOT NULL);
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INSERT INTO t1 SET a = "", d= "2003-01-14 03:54:55";
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UPDATE t1 SET d=1/NULL;
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UPDATE t1 SET d=NULL;
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--error 1048
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INSERT INTO t1 (a) values (null);
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--error 1048
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INSERT INTO t1 (a) values (1/null);
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INSERT INTO t1 (a) values (null),(null);
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--error 1048
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INSERT INTO t1 (b) values (null);
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--error 1048
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INSERT INTO t1 (b) values (1/null);
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INSERT INTO t1 (b) values (null),(null);
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--error 1048
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INSERT INTO t1 (c) values (null);
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--error 1048
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INSERT INTO t1 (c) values (1/null);
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INSERT INTO t1 (c) values (null),(null);
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--error 1048
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INSERT INTO t1 (d) values (null);
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--error 1048
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INSERT INTO t1 (d) values (1/null);
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INSERT INTO t1 (d) values (null),(null);
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select * from t1;
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drop table t1;
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