database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

Don't count NULL values in cardinalty for MyISAM tables.

Browse Source 
Free row buffer cache after each query for MyISAM tables.
Added table join option FORCE INDEX
Fixed core dump bug when connecting with hostname that could not be resolved.
This commit is contained in:
monty@mashka.mysql.fi
2003-01-09 02:19:14 +02:00
parent 23c13c4539
commit 3c08da957e
17 changed files with 207 additions and 52 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
mysql-test/t/myisam.test
View File

@ -2,7 +2,13 @@
# Test bugs in the MyISAM code
#
drop table if exists t1;
# Initialise
drop table if exists t1,t2;
#
# Test problem with CHECK TABLE;
#
CREATE TABLE t1 (
STRING_DATA char(255) default NULL,
KEY STRING_DATA (STRING_DATA)
@ -326,3 +332,21 @@ CREATE TABLE t1 (a varchar(255), b varchar(255), c varchar(255));
ALTER TABLE t1 ADD INDEX t1 (a, b, c);
DROP TABLE t1;
#
# Test of cardinality of keys with NULL
#
CREATE TABLE t1 (a int not null, b int, c int, key(b), key(c), key(a,b), key(c,a));
INSERT into t1 values (0, null, 0), (0, null, 1), (0, null, 2), (0, null,3), (1,1,4);
create table t2 (a int not null, b int, c int, key(b), key(c), key(a));
INSERT into t2 values (1,1,1), (2,2,2);
optimize table t1;
show index from t1;
explain select * from t1,t2 where t1.a=t2.a;
explain select * from t1,t2 force index(a) where t1.a=t2.a;
explain select * from t1 force index(a),t2 force index(a) where t1.a=t2.a;
explain select * from t1,t2 where t1.b=t2.b;
explain select * from t1,t2 force index(c) where t1.a=t2.a;
explain select * from t1 where a=0 or a=2;
explain select * from t1 force index (a) where a=0 or a=2;
drop table t1,t2;