database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-12-24 11:21:21 +03:00
Code Activity

Bug#51830: Incorrect partition pruning on range partition

Browse Source 
(regression)

Problem was that partition pruning did not exclude the
last partition if the range was beyond it
(i.e. not using MAXVALUE)

Fix was to not include the last partition if the
partitioning function value was not within the partition
range.

mysql-test/r/partition_innodb.result:
  Bug#51830: Incorrect partition pruning on range partition
  (regression)
  
  Updated result
mysql-test/r/partition_pruning.result:
  Bug#51830: Incorrect partition pruning on range partition
  (regression)
  
  Updated result
mysql-test/t/partition_innodb.test:
  Bug#51830: Incorrect partition pruning on range partition
  (regression)
  
  Added test for pruning in InnoDB, since it does not show
  for MyISAM due to 'Impossible WHERE noticed after reading
  const tables'.
mysql-test/t/partition_pruning.test:
  Bug#51830: Incorrect partition pruning on range partition
  (regression)
  
  Added test
sql/sql_partition.cc:
  Bug#51830: Incorrect partition pruning on range partition
  (regression)
  
  Also increase the partition id if not inside the last partition
  (and no MAXVALUE is defined).
  
  Added comments and DBUG_ASSERT.
This commit is contained in:
Mattias Jonsson
2010-03-10 12:56:05 +01:00
parent 25a9f5e094
commit 29b39e7a44
5 changed files with 202 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
mysql-test/r/partition_innodb.result
View File

@@ -1,4 +1,53 @@
drop table if exists t1;
#
# Bug#51830: Incorrect partition pruning on range partition (regression)
#
CREATE TABLE t1 (a INT NOT NULL)
ENGINE = InnoDB
PARTITION BY RANGE(a)
(PARTITION p10 VALUES LESS THAN (10),
PARTITION p30 VALUES LESS THAN (30),
PARTITION p50 VALUES LESS THAN (50),
PARTITION p70 VALUES LESS THAN (70),
PARTITION p90 VALUES LESS THAN (90));
INSERT INTO t1 VALUES (10),(30),(50);
INSERT INTO t1 VALUES (70);
INSERT INTO t1 VALUES (80);
INSERT INTO t1 VALUES (89);
INSERT INTO t1 VALUES (90);
ERROR HY000: Table has no partition for value 90
INSERT INTO t1 VALUES (100);
ERROR HY000: Table has no partition for value 100
insert INTO t1 VALUES (110);
ERROR HY000: Table has no partition for value 110
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 90;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 90;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = 90;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = 89;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p90 ALL NULL NULL NULL NULL 7 Using where
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 89;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p90 ALL NULL NULL NULL NULL 7 Using where
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 89;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = 100;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 100;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 100;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where
DROP TABLE t1;
create table t1 (a int not null,
b datetime not null,
primary key (a,b))