database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-27 18:02:13 +03:00
Code Activity

Fix for bug #39932 "create table fails if column for FK is in different

Browse Source 
case than in corr index".

Server was unable to find existing or explicitly created supporting
index for foreign key if corresponding statement clause used field
names in case different than one used in key specification and created
yet another supporting index.
In cases when name of constraint (and thus name of generated index)
was the same as name of existing/explicitly created index this led
to duplicate key name error.

The problem was that unlike all other code Key_part_spec::operator==()
compared field names in case sensitive fashion. As result routines
responsible for getting rid of redundant generated supporting indexes
for foreign key were not working properly for versions of field names
using different cases.
This commit is contained in:
Dmitry Lenev
2009-10-09 19:18:52 +04:00
parent 43bf01e337
commit 268da1b1d3
3 changed files with 40 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

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

@ -2209,3 +2209,23 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 128 Using where
DROP TABLE t1;
End of 5.1 tests
#
# Test for bug #39932 "create table fails if column for FK is in different
# case than in corr index".
#
drop tables if exists t1, t2;
create table t1 (pk int primary key) engine=InnoDB;
# Even although the below statement uses uppercased field names in
# foreign key definition it still should be able to find explicitly
# created supporting index. So it should succeed and should not
# create any additional supporting indexes.
create table t2 (fk int, key x (fk),
constraint x foreign key (FK) references t1 (PK)) engine=InnoDB;
show create table t2;
Table Create Table
t2 CREATE TABLE `t2` (
`fk` int(11) DEFAULT NULL,
KEY `x` (`fk`),
CONSTRAINT `x` FOREIGN KEY (`fk`) REFERENCES `t1` (`pk`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t2, t1;