Dropping primary key/unique key

[Nils Valentin]

Hi Mysql fans ;-);

I have a problem understanding why MySQL is deleting a unique key instead of
a primary key.

from Documentation: DROP PRIMARY KEY drops the primary index. If no such index
exists, it drops the first UNIQUE index in the table.

When I do it then I get this:

mysql> desc uksample4;
+-------+----------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+----------+------+-----+---------+-------+
| id | int(11) | | UNI | 0 | |
| name | char(30) | YES | | NULL | |
| tel | char(20) | | PRI | | |
+-------+----------+------+-----+---------+-------+
3 rows in set (0.00 sec)

mysql> alter table uksample4 drop primary key ;
Query OK, 0 rows affected (0.24 sec)
Records: 0 Duplicates: 0 Warnings: 0

mysql> desc uksample4;
+-------+----------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+----------+------+-----+---------+-------+
| id | int(11) | | | 0 | |
| name | char(30) | YES | | NULL | |
| tel | char(20) | | PRI | | |
+-------+----------+------+-----+---------+-------+
3 rows in set (0.00 sec)

It deletes the unique key (id) instead of he primary key (tel).

Did I do something wrong ?

MySQL 4.0.14

Best regards

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Valentin Nils
Internet Technology

E-Mail: ni**@knowd.co.j p
URL: http://www.knowd.co.jp
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