Bonjour,
Mysql-3.23.37 with latest patch (patch of the patch from Heikki :)
) under Solaris 2.8 (SPARC 64bit).
I have a table :
CREATE TABLE mybuffer (
id int(10) unsigned NOT NULL auto_increment,
bourse char(3) NOT NULL default '',
service varchar(10) NOT NULL default '',
date datetime NOT NULL default '0000-00-00 00:00:00',
data text,
PRIMARY KEY (id),
KEY id_bourse (bourse),
KEY id_date (date)
) TYPE=Innobase;
mysql> desc mybuffer;
+---------+------------------+------+-----+---------------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------+------------------+------+-----+---------------------+----------------+
| id | int(10) unsigned | | PRI | NULL | auto_increment |
| bourse | char(3) | | MUL | | |
| service | varchar(10) | | | | |
| date | datetime | | MUL | 0000-00-00 00:00:00 | |
| data | text | YES | | NULL | |
+---------+------------------+------+-----+---------------------+----------------+
5 rows in set (0.00 sec)
If I look for distinct 'bourse' :
mysql> select distinct bourse from mybuffer;
+--------+
| bourse |
+--------+
| NAS |
| PAR |
+--------+
2 rows in set (0.75 sec)
If I want to know the number of rows with 'bourse' equal to 'NAS' :
mysql> select count(*) from mybuffer where bourse='NAS';
+----------+
| count(*) |
+----------+
| 0 |
+----------+
1 row in set (0.01 sec)
!!??
If I remove the count() :
mysql> select * from mybuffer where bourse='NAS';
+--------+--------+---------+---------------------+------------------------------------------------+
| id | bourse | service | date | data
| |
+--------+--------+---------+---------------------+------------------------------------------------+
| 122429 | NAS | live | 2001-04-26 18:46:34 |
|TCHBS?0138.95?4153600?7118:46:34?51300 |
| 122430 | NAS | live | 2001-04-26 18:46:34 |
|TASML?0126.55?41856100?7118:46:34?511000 |
| 122431 | NAS | live | 2001-04-26 18:46:34 |
|TINTC?0129.8?431331600?7118:46:34?51100 |
| 122432 | NAS | live | 2001-04-26 18:46:34 |
|TBEAS?0138.87?47440700?7118:46:34?51200 |
| 122433 | NAS | live | 2001-04-26 18:46:34 |
|TINTC?0129.8?431332100?7118:46:34?51500 |
| 122434 | NAS | live | 2001-04-26 18:46:34 |
|TBEAS?0138.9?47440900?7118:46:34?51200 |
| 122435 | NAS | live | 2001-04-26 18:46:34 |
|TMCSI?0117.8?4130800?7118:46:34?512500 |
| 122436 | NAS | live | 2001-04-26 18:46:34 |
|TMSFT?0170.54?432247800?7118:46:34?513100 |
| 122437 | NAS | live | 2001-04-26 18:46:34 |
|TXOXO?014.89?425024700?7118:46:34?51800 |
| 122438 | NAS | live | 2001-04-26 18:46:34 |
|TMSFT?0170.54?432248500?7118:46:34?51700 |
| 122439 | NAS | live | 2001-04-26 18:46:34 |
|TMXIM?0147.95?41768500?7118:46:34?511000 |
....
| 123155 | NAS | live | 2001-04-26 18:46:45 |
|TMYGN?0147.85?4476900?7118:46:45?51100 |
| 123156 | NAS | live | 2001-04-26 18:46:45 |
|TNITE?0118.4?41775300?7118:46:45?51100 |
| 123157 | NAS | live | 2001-04-26 18:46:45 |
|TSEBL?0144.05?48318200?7118:46:45?51200 |
| 123158 | NAS | live | 2001-04-26 18:46:45 |
|TNWAC?0125.18?4265600?7118:46:45?51100 |
+--------+--------+---------+---------------------+------------------------------------------------+
730 rows in set (0.03 sec)
Strange.
I've not yet tried to find if this is only a bug on this table or if
I can repeat it on another table. But I can repeat these answers on
this table.
Regards,
Alex.
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