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Bug#37721: ORDER BY when WHERE contains non-partitioned

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index column

There was actually two problems
1) when clustered pk, order by non pk index should also
compare with pk as last resort to differ keys from each
other
2) bug in the index search handling in ha_partition (was
found when extending the test case

Solution to 1 was to include the pk in key compare if
clustered pk and search on other index.

Solution for 2 was to remove the optimization from
ordered scan to unordered scan if clustered pk.
This commit is contained in:
Mattias Jonsson
2008-10-10 12:01:01 +02:00
parent e300184c01
commit 44630e09ee
5 changed files with 234 additions and 75 deletions
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65
mysql-test/r/partition_innodb.result
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@ -1,3 +1,68 @@
# Bug#37721, test of ORDER BY on PK and WHERE on INDEX
CREATE TABLE t1 (
a INT,
b INT,
PRIMARY KEY (a),
INDEX (b))
ENGINE InnoDB
PARTITION BY HASH(a)
PARTITIONS 3;
INSERT INTO t1 VALUES (0,0),(4,0),(2,0);
SELECT a FROM t1 WHERE b = 0 ORDER BY a ASC;
a
0
2
4
SELECT a FROM t1 WHERE b = 0 ORDER BY a DESC;
a
4
2
0
ALTER TABLE t1 DROP INDEX b;
SELECT a FROM t1 WHERE b = 0 ORDER BY a ASC;
a
0
2
4
SELECT a FROM t1 WHERE b = 0 ORDER BY a DESC;
a
4
2
0
DROP TABLE t1;
CREATE TABLE t1 (
a VARCHAR(600),
b VARCHAR(600),
PRIMARY KEY (a),
INDEX (b))
ENGINE InnoDB
PARTITION BY KEY(a)
PARTITIONS 3;
INSERT INTO t1 VALUES (concat(repeat('MySQL',100),'1'),repeat('0',257));
INSERT INTO t1 VALUES (concat(repeat('MySQL',100),'3'),repeat('0',257));
INSERT INTO t1 VALUES (concat(repeat('MySQL',100),'2'),repeat('0',257));
SELECT right(a,1) FROM t1 WHERE b = repeat('0',257) ORDER BY a ASC;
right(a,1)
1
2
3
SELECT right(a,1) FROM t1 WHERE b = repeat('0',257) ORDER BY a DESC;
right(a,1)
3
2
1
ALTER TABLE t1 DROP INDEX b;
SELECT right(a,1) FROM t1 WHERE b = repeat('0',257) ORDER BY a ASC;
right(a,1)
1
2
3
SELECT right(a,1) FROM t1 WHERE b = repeat('0',257) ORDER BY a DESC;
right(a,1)
3
2
1
DROP TABLE t1;
# Bug#32948
CREATE TABLE t1 (c1 INT, PRIMARY KEY (c1)) ENGINE=INNODB;
CREATE TABLE t2 (c1 INT, PRIMARY KEY (c1),