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Bug#19371 VARBINARY() have trailing zeros after upgrade from 4.1

- Detect if a table has field of type MYSQL_TYPE_VAR_STRING while running
   "CHECK TABLE t FOR UPGRADE" and indicate it need to be fixed
   with "REPAIR TABLE t".
 - When running a "REPAIR TABLE t" or "ALTER TABLE t FORCE" on the above
   table, install a special copy function to trim off the trailing spaces
   which we safely can say that the pre 5.0 mysqld didn't put there.
This commit is contained in:
msvensson@neptunus.(none)
2006-11-09 12:00:27 +01:00
parent 4b9ea8c0e2
commit 4c26bf9c1d
7 changed files with 120 additions and 0 deletions

View File

@ -26,3 +26,55 @@ select x,xx from t1;
x xx
1 2
drop table t1;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` varbinary(255) default NULL,
`b` varchar(255) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select length(a), length(b) from t1;
length(a) length(b)
255 3
255 3
CHECK TABLE t1 FOR UPGRADE;
Table Op Msg_type Msg_text
test.t1 check error Table upgrade required. Please do "REPAIR TABLE `t1`" to fix it!
REPAIR TABLE t1;
Table Op Msg_type Msg_text
test.t1 repair status OK
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` varbinary(255) default NULL,
`b` varchar(255) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select length(a), length(b) from t1;
length(a) length(b)
3 3
3 3
insert into t1 values("ccc", "ddd");
select length(a), length(b) from t1;
length(a) length(b)
3 3
3 3
3 3
select hex(a), hex(b) from t1;
hex(a) hex(b)
616161 636363
626262 646464
636363 646464
select concat("'", a, "'"), concat("'", b, "'") from t1;
concat("'", a, "'") concat("'", b, "'")
'aaa' 'ccc'
'bbb' 'ddd'
'ccc' 'ddd'
drop table t1;
create table t1(a varbinary(255));
insert into t1 values("aaa ");
select length(a) from t1;
length(a)
6
alter table t1 modify a varchar(255);
select length(a) from t1;
length(a)
6