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

Change of internal key_field=NULL handling to avoid error messages.

Browse Source 
Optimized SELECT DISTINCT ... ORDER BY ... LIMIT
Fixed reference to uninitalized variable
This commit is contained in:
monty@hundin.mysql.fi
2002-12-03 13:08:25 +02:00
parent ce56f927fa
commit 8830eb4aa9
25 changed files with 315 additions and 119 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
mysql-test/t/null.test
View File

@@ -34,3 +34,17 @@ SELECT * FROM t1 WHERE indexed_field=NULL;
SELECT * FROM t1 WHERE indexed_field IS NULL;
SELECT * FROM t1 WHERE indexed_field<=>NULL;
DROP TABLE t1;
#
# Testing of IFNULL
#
create table t1 (a int, b int) type=myisam;
insert into t1 values(20,null);
select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
t2.b=t3.a;
select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
t2.b=t3.a order by 1;
insert into t1 values(10,null);
select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
t2.b=t3.a order by 1;
drop table t1;