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dd68976a24
Now test for NULLness the pointers returned from objects created from the default value. Pushing patch on behalf of cmiller. mysql-test/r/null.result: Add test case mysql-test/t/null.test: Add test case sql/sql_table.cc: No longer blindly dereference pointer of the string representation of the values, where "NULL" is NUL. Raise INVALID DEFAULT error messages where appropriate. Note that the -O1 optimization flag made debugging this extremely tricky, with misleading results, and that removing it from the Makefile during debugging can be invaluable.
231 lines
7.8 KiB
Text
231 lines
7.8 KiB
Text
# 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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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;
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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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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;
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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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explain extended 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) engine=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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#
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# Test to check elimination of IS NULL predicate for a non-nullable attribute
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# (bug #1990)
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#
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create table t1 (a int not null, b int not null, index idx(a));
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insert into t1 values
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(1,1), (2,2), (3,3), (4,4), (5,5), (6,6),
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(7,7), (8,8), (9,9), (10,10), (11,11), (12,12);
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explain select * from t1 where a between 2 and 3;
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explain select * from t1 where a between 2 and 3 or b is null;
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drop table t1;
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select cast(NULL as signed);
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#
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# Test case for bug #4256
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#
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create table t1(i int, key(i));
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insert into t1 values(1);
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insert into t1 select i*2 from t1;
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insert into t1 select i*2 from t1;
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insert into t1 select i*2 from t1;
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insert into t1 select i*2 from t1;
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insert into t1 select i*2 from t1;
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insert into t1 select i*2 from t1;
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insert into t1 select i*2 from t1;
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insert into t1 select i*2 from t1;
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insert into t1 select i*2 from t1;
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explain select * from t1 where i=2 or i is null;
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alter table t1 change i i int not null;
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explain select * from t1 where i=2 or i is null;
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drop table t1;
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#
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# NULL has its own type BINARY(0) by default.
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# But NULL should be weaker than a constant
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# when mixing charsets/collations
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#
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set names latin2;
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# Check that result type is taken from a non-null string
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create table t1 select
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null as c00,
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if(1, null, 'string') as c01,
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if(0, null, 'string') as c02,
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ifnull(null, 'string') as c03,
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ifnull('string', null) as c04,
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case when 0 then null else 'string' end as c05,
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case when 1 then null else 'string' end as c06,
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coalesce(null, 'string') as c07,
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coalesce('string', null) as c08,
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least('string',null) as c09,
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least(null, 'string') as c10,
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greatest('string',null) as c11,
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greatest(null, 'string') as c12,
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nullif('string', null) as c13,
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nullif(null, 'string') as c14,
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trim('string' from null) as c15,
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trim(null from 'string') as c16,
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substring_index('string', null, 1) as c17,
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substring_index(null, 'string', 1) as c18,
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elt(1, null, 'string') as c19,
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elt(1, 'string', null) as c20,
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concat('string', null) as c21,
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concat(null, 'string') as c22,
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concat_ws('sep', 'string', null) as c23,
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concat_ws('sep', null, 'string') as c24,
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concat_ws(null, 'string', 'string') as c25,
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make_set(3, 'string', null) as c26,
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make_set(3, null, 'string') as c27,
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export_set(3, null, 'off', 'sep') as c29,
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export_set(3, 'on', null, 'sep') as c30,
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export_set(3, 'on', 'off', null) as c31,
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replace(null, 'from', 'to') as c32,
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replace('str', null, 'to') as c33,
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replace('str', 'from', null) as c34,
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insert('str', 1, 2, null) as c35,
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insert(null, 1, 2, 'str') as c36,
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lpad('str', 10, null) as c37,
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rpad(null, 10, 'str') as c38;
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show create table t1;
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drop table t1;
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#
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# Check that comparison is done according to
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# non-null string collation, i.e. case insensitively,
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# rather than according to NULL's collation, i.e. case sensitively
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#
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-- in field
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select
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case 'str' when 'STR' then 'str' when null then 'null' end as c01,
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case 'str' when null then 'null' when 'STR' then 'str' end as c02,
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field(null, 'str1', 'str2') as c03,
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field('str1','STR1', null) as c04,
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field('str1', null, 'STR1') as c05,
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'string' in ('STRING', null) as c08,
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'string' in (null, 'STRING') as c09;
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# Restore charset to the default value.
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set names latin1;
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#
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# Bug#19145: mysqld crashes if you set the default value of an enum field to NULL
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#
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create table bug19145a (e enum('a','b','c') default 'b' , s set('x', 'y', 'z') default 'y' ) engine=MyISAM;
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create table bug19145b (e enum('a','b','c') default null, s set('x', 'y', 'z') default null) engine=MyISAM;
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create table bug19145c (e enum('a','b','c') not null default 'b' , s set('x', 'y', 'z') not null default 'y' ) engine=MyISAM;
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# Invalid default value for 's'
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--error 1067
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create table bug19145setnotnulldefaultnull (e enum('a','b','c') default null, s set('x', 'y', 'z') not null default null) engine=MyISAM;
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# Invalid default value for 'e'
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--error 1067
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create table bug19145enumnotnulldefaultnull (e enum('a','b','c') not null default null, s set('x', 'y', 'z') default null) engine=MyISAM;
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alter table bug19145a alter column e set default null;
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alter table bug19145a alter column s set default null;
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alter table bug19145a add column (i int);
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alter table bug19145b alter column e set default null;
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alter table bug19145b alter column s set default null;
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alter table bug19145b add column (i int);
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# Invalid default value for 'e'
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--error 1067
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alter table bug19145c alter column e set default null;
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# Invalid default value for 's'
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--error 1067
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alter table bug19145c alter column s set default null;
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alter table bug19145c add column (i int);
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show create table bug19145a;
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show create table bug19145b;
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show create table bug19145c;
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drop table bug19145a;
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drop table bug19145b;
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drop table bug19145c;
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# End of 4.1 tests
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