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

Fix for bug #30782: Truncated UNSIGNED BIGINT columns only in SELECT w/ CASE,

Browse Source 
JOIN, and ORDER BY

Problem: improper maximum length calculation of the CASE function leads to 
decimal value truncation (storing/retrieving decimal field values).

Fix: accurately calculate maximum length/unsigned flag/decimals parameters 
of the CASE function.
This commit is contained in:
ramil/ram@mysql.com/ramil.myoffice.izhnet.ru
2007-10-29 12:20:21 +04:00
parent 3d203e55e6
commit 98a4d99961
4 changed files with 70 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
mysql-test/r/case.result
View File

@@ -1,4 +1,4 @@
drop table if exists t1;
drop table if exists t1, t2;
select CASE "b" when "a" then 1 when "b" then 2 END;
CASE "b" when "a" then 1 when "b" then 2 END
2
@@ -200,3 +200,21 @@ CEMPNUM EMPMUM1 EMPNUM2
0.00 0 0.00
2.00 2 NULL
DROP TABLE t1,t2;
End of 4.1 tests
create table t1 (a int, b bigint unsigned);
create table t2 (c int);
insert into t1 (a, b) values (1,4572794622775114594), (2,18196094287899841997),
(3,11120436154190595086);
insert into t2 (c) values (1), (2), (3);
select t1.a, (case t1.a when 0 then 0 else t1.b end) d from t1
join t2 on t1.a=t2.c order by d;
a d
1 4572794622775114594
3 11120436154190595086
2 18196094287899841997
select t1.a, (case t1.a when 0 then 0 else t1.b end) d from t1
join t2 on t1.a=t2.c where b=11120436154190595086 order by d;
a d
3 11120436154190595086
drop table t1, t2;
End of 5.0 tests