Comments on: What to do When Your Data Smiles At You…

By: Cevarief

Cevarief — Wed, 25 Jun 2008 01:15:51 +0000

I’m curious to test it on mysql shipped with opensuse 10.3. It shows diamond for bit 1 and blank for 0. When i paste to this comment text…it’s different.

mysql> select * from bits;
+——+
| val |
+——+
| |
| |
| |
| |
+——+

By: CaptTofu

CaptTofu — Tue, 24 Jun 2008 14:50:43 +0000

Yes, I’ve had all manner of oddball characters spew out at me, particularly when developing Federated and I break something in the process.

By: Mark Leith

Mark Leith — Tue, 24 Jun 2008 12:23:49 +0000

Yes, it has! :) The smiling only happens on Windows however - I guess it just tries to make you more happy! ;)

http://bugs.mysql.com/bug.php?id=28422

http://dev.mysql.com/doc/refman/5.0/en/bit-field-values.html

By: Santo Leto

Santo Leto — Tue, 24 Jun 2008 11:10:46 +0000

Yeah, and…I stood in open-mouthed!

This is not due to 6.0.4-alpha. For bit fields, please try use the following script:

select version();

use test;

drop table if exists bits;
create table bits (id int auto_increment primary key, val bit(1));

insert into bits (id) values (1),(2),(3);
select * from bits;

update bits set val=b’1′ where id=1;
update bits set val=b’0′ where id=2;
update bits set val=b’1′ where id=3;

select bin(val) from bits;

Output:

mysql> select version();
+————————-+
| version() |
+————————-+
| 5.1.24-rc-community-log |
+————————-+
1 row in set (0.00 sec)

mysql>
mysql> use test;
Database changed
mysql>
mysql> drop table if exists bits;
Query OK, 0 rows affected (0.05 sec)

mysql> create table bits (id int auto_increment primary key, val bit(1));
Query OK, 0 rows affected (0.09 sec)

mysql>
mysql> insert into bits (id) values (1),(2),(3);
Query OK, 3 rows affected (0.05 sec)
Records: 3 Duplicates: 0 Warnings: 0

mysql> select * from bits;
+—-+——+
| id | val |
+—-+——+
| 1 | NULL |
| 2 | NULL |
| 3 | NULL |
+—-+——+
3 rows in set (0.00 sec)

mysql>
mysql> update bits set val=b’1′ where id=1;
Query OK, 1 row affected (0.03 sec)
Rows matched: 1 Changed: 1 Warnings: 0

mysql> update bits set val=b’0′ where id=2;
Query OK, 1 row affected (0.03 sec)
Rows matched: 1 Changed: 1 Warnings: 0

mysql> update bits set val=b’1′ where id=3;
Query OK, 1 row affected (0.03 sec)
Rows matched: 1 Changed: 1 Warnings: 0

mysql>
mysql> select bin(val) from bits;
+———-+
| bin(val) |
+———-+
| 1 |
| 0 |
| 1 |
+———-+

By: Roland Bouman

Roland Bouman — Tue, 24 Jun 2008 06:21:50 +0000

I think this is due to the encoding used by the windows shell.

By: Arjen Lentz

Arjen Lentz — Tue, 24 Jun 2008 04:52:23 +0000

Yea - you just have UTF8 working in your console, plus the MySQL connection and everything else on the same wavelength.

By: Antony Curtis

Antony Curtis — Tue, 24 Jun 2008 03:56:18 +0000

IBM ASCII 1 looks like the smiley face…

Nothing unusual… trust me. ;)