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Additional tweak to fix for bug #10543, to prevent a change in

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behavior when extending fields that were fully part of a
multi-part key.


mysql-test/r/key.result:
  Update results
mysql-test/t/key.test:
  Add test for behavior of extending fields in a multi-part key
  that were defined with a partial length the same as their
  field length.
sql/sql_table.cc:
  Reset key_part_length when old field length was the same as the
  old key_part_length.
This commit is contained in:
unknown
2005-06-02 10:00:36 -07:00
parent f0329bfb8c
commit dd8e174fa6
3 changed files with 42 additions and 0 deletions
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25
mysql-test/r/key.result
View File

@ -329,3 +329,28 @@ ERROR 42S21: Duplicate column name 'c1'
alter table t1 add key (c1,c1,c2);
ERROR 42S21: Duplicate column name 'c1'
drop table t1;
create table t1 (a varchar(10), b varchar(10), key(a(10),b(10)));
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` varchar(10) default NULL,
`b` varchar(10) default NULL,
KEY `a` (`a`,`b`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
alter table t1 modify b varchar(20);
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` varchar(10) default NULL,
`b` varchar(20) default NULL,
KEY `a` (`a`,`b`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
alter table t1 modify a varchar(20);
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` varchar(20) default NULL,
`b` varchar(20) default NULL,
KEY `a` (`a`,`b`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;

13
mysql-test/t/key.test
View File

@ -324,3 +324,16 @@ alter table t1 add key (c1,c2,c1);
--error 1060
alter table t1 add key (c1,c1,c2);
drop table t1;
#
# If we use a partial field for a key that is actually the length of the
# field, and we extend the field, we end up with a key that includes the
# whole new length of the field.
#
create table t1 (a varchar(10), b varchar(10), key(a(10),b(10)));
show create table t1;
alter table t1 modify b varchar(20);
show create table t1;
alter table t1 modify a varchar(20);
show create table t1;
drop table t1;