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a fix (bug #2361: ALTER TABLE ... DROP PRIMARY KEY drops a non-primary key).

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unknown
2004-01-13 16:18:37 +04:00
parent 41b3fb05d5
commit 21e2c72bfb
3 changed files with 23 additions and 3 deletions
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9
mysql-test/r/alter_table.result
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@ -412,3 +412,12 @@ t1 0 PRIMARY 1 Host A NULL NULL NULL BTREE
t1 0 PRIMARY 2 User A 0 NULL NULL BTREE
t1 1 Host 1 Host A NULL NULL NULL BTREE disabled
DROP TABLE t1;
CREATE TABLE t1 (a int UNIQUE);
ALTER TABLE t1 DROP PRIMARY KEY;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) default NULL,
UNIQUE KEY `a` (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;

9
mysql-test/t/alter_table.test
View File

@ -244,3 +244,12 @@ LOCK TABLES t1 WRITE;
ALTER TABLE t1 DISABLE KEYS;
SHOW INDEX FROM t1;
DROP TABLE t1;
#
# Bug 2361
#
CREATE TABLE t1 (a int UNIQUE);
ALTER TABLE t1 DROP PRIMARY KEY;
SHOW CREATE TABLE t1;
DROP TABLE t1;

8
sql/sql_table.cc
View File

@ -2242,13 +2242,15 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
KEY *key_info=table->key_info;
for (uint i=0 ; i < table->keys ; i++,key_info++)
{
if (drop_primary && (key_info->flags & HA_NOSAME))
char *key_name= key_info->name;
if (drop_primary && !my_strcasecmp(system_charset_info, key_name,
"PRIMARY"))
{
drop_primary=0;
drop_primary= 0;
continue;
}
char *key_name=key_info->name;
Alter_drop *drop;
drop_it.rewind();
while ((drop=drop_it++))