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A fix for the bug with:

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delete from table where column<=>NULL 
on indexed columns
This commit is contained in:
unknown 2002-11-21 22:13:23 +02:00
commit a3a99fc7ca
3 changed files with 12 additions and 1 deletions
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6
mysql-test/r/delete.result
View file

@ -24,3 +24,9 @@ create table t1 (a bigint not null, primary key (a,a,a,a,a,a,a,a,a,a));
insert into t1 values (2),(4),(6),(8),(10),(12),(14),(16),(18),(20),(22),(24),(26),(23),(27);
delete from t1 where a=27;
drop table t1;
create table t1 (id int, index(id));
insert into t1 values(NULL);
delete from t1 where id <=> NULL;
select * from t1;
id
drop table if exists t1;

5
mysql-test/t/delete.test
View file

@ -35,3 +35,8 @@ create table t1 (a bigint not null, primary key (a,a,a,a,a,a,a,a,a,a));
insert into t1 values (2),(4),(6),(8),(10),(12),(14),(16),(18),(20),(22),(24),(26),(23),(27);
delete from t1 where a=27;
drop table t1;
create table t1 (id int, index(id));
insert into t1 values(NULL);
delete from t1 where id <=> NULL;
select * from t1;
drop table if exists t1;

2
sql/opt_range.cc
View file

@ -1024,7 +1024,7 @@ get_mm_leaf(PARAM *param, Field *field, KEY_PART *key_part,
field->cmp_type() != value->result_type())
DBUG_RETURN(0);
if (value->save_in_field(field))
if (value->save_in_field(field) || value->is_null())
{
// TODO; Check if we can we remove the following block.
if (type == Item_func::EQUAL_FUNC)