database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2026-01-06 05:22:24 +03:00
Code Activity

Merge with 4.0.14

Browse Source
This commit is contained in:
monty@mashka.mysql.fi
2003-08-11 22:44:43 +03:00
parent 1279f9b024 6e7a509d06
commit 2263e3e51f
363 changed files with 13819 additions and 2895 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
mysql-test/t/select.test
View File

@@ -1527,10 +1527,24 @@ select t2.fld1,t22.fld1 from t2,t2 t22 where t2.fld1 >= 250501 and t2.fld1 <= 25
#
# Test of left join.
#
insert into t2 (fld1, companynr) values (999999,99);
select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
select count(*) from t2 left join t4 using (companynr) where t4.companynr is not null;
explain select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr is null;
delete from t2 where fld1=999999;
#
# Test left join optimization
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0;
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0;
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 and t4.companynr > 0;
# Following can't be optimized
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr is null;
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0 or t4.companynr > 0;
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where ifnull(t2.companynr,1)>0;
#
# Joins with forms.
@@ -1821,3 +1835,23 @@ CREATE TABLE t2 ( id int(11) NOT NULL auto_increment, PRIMARY KEY (id)) TYPE=M
INSERT INTO t2 VALUES (2517), (2518), (2519), (2520), (2521), (2522);
select * from t1, t2 WHERE t1.t2_id = t2.id and t1.t2_id > 0 order by t1.id LIMIT 0, 5;
drop table t1,t2;
#
# outer join, impossible on condition, where, and usable key for range
#
create table t1 (id1 int NOT NULL);
create table t2 (id2 int NOT NULL);
create table t3 (id3 int NOT NULL);
create table t4 (id4 int NOT NULL, id44 int NOT NULL, KEY (id4));
insert into t1 values (1);
insert into t1 values (2);
insert into t2 values (1);
insert into t4 values (1,1);
explain select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3
left join t4 on id3 = id4 where id2 = 1 or id4 = 1;
select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3
left join t4 on id3 = id4 where id2 = 1 or id4 = 1;
drop table t1,t2,t3,t4;