database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-09-11 05:52:26 +03:00
Code Activity

BUG20733: Bug in partition pruning with zerofill field

Browse Source 
Problem was with handling NULL values in ranges
This commit is contained in:
mikael/pappa@dator5.(none)
2006-07-20 05:28:16 -04:00
parent bae61f209d
commit cef004845c
10 changed files with 521 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

94
mysql-test/r/partition_list.result
View File

@@ -1,4 +1,98 @@
drop table if exists t1;
create table t1 (a int unsigned)
partition by list (a)
(partition p0 values in (0),
partition p1 values in (1),
partition pnull values in (null),
partition p2 values in (2));
insert into t1 values (null),(0),(1),(2);
select * from t1 where a < 2;
a
0
1
select * from t1 where a <= 0;
a
0
select * from t1 where a < 1;
a
0
select * from t1 where a > 0;
a
1
2
select * from t1 where a > 1;
a
2
select * from t1 where a >= 0;
a
0
1
2
select * from t1 where a >= 1;
a
1
2
select * from t1 where a is null;
a
NULL
select * from t1 where a is not null;
a
0
1
2
select * from t1 where a is null or a > 0;
a
1
NULL
2
drop table t1;
create table t1 (a int unsigned, b int)
partition by list (a)
subpartition by hash (b)
subpartitions 2
(partition p0 values in (0),
partition p1 values in (1),
partition pnull values in (null, 2),
partition p3 values in (3));
insert into t1 values (0,0),(0,1),(1,0),(1,1),(null,0),(null,1);
insert into t1 values (2,0),(2,1),(3,0),(3,1);
explain partitions select * from t1 where a is null;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 4 Using where
select * from t1 where a is null;
a b
NULL 0
NULL 1
explain partitions select * from t1 where a = 2;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 4 Using where
select * from t1 where a = 2;
a b
2 0
2 1
select * from t1 where a <= 0;
a b
0 0
0 1
select * from t1 where a < 3;
a b
0 0
0 1
1 0
1 1
2 0
2 1
select * from t1 where a >= 1 or a is null;
a b
1 0
1 1
NULL 0
2 0
NULL 1
2 1
3 0
3 1
drop table t1;
CREATE TABLE t1 (
a int not null,
b int not null,